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Levelling Agent HL988/HL788/HL505 is a family of polyacrylate-based leveling agents offered by Huangshan Huahui Technology to improve surface flow, film leveling, substrate wetting and final surface smoothness in powder coating systems.
The HL988, HL788 and HL505 in this product family were developed to address the same basic technical problem, namely the problem that the powder coating film does not spread evenly enough during melting and curing. However, the three grades are not the same product and should not be substituted at the same usage rate.
Levelling Agent HL988/HL788/HL505 is defined as a silica carrier polyacrylate-based general-purpose leveling agent in manufacturer and commercial technical sources. It can be used in pure epoxy, epoxy/polyester hybrid, pure polyester TGIC/HAA, polyurethane and different thermoset powder coating systems. The recommended general use level is approximately 0.8–1.2% of the total formulation weight.
Levelling Agent HL988/HL788/HL505 is also positioned as a general-purpose powder coating leveling agent based on polyacrylate carried on silica. It is specifically stated that the product does not contain silicone. This feature is important in reducing the risk of unnecessary negative effects on coating adhesion while ensuring surface leveling. The general recommended dosage for HL788 is approximately 1.2–1.6%.
Levelling Agent HL988/HL788/HL505 is a silica carrier polyacrylate based leveling agent. It can be used in epoxy, hybrid, pure polyester, polyurethane and both thermoset and some thermoplastic powder coating systems. In technical product sources, it is seen that HL505 is especially positioned to reduce surface tension, eliminate fish-eye and crater defects, improve substrate wetting and provide cost advantages. The recommended usage level is approximately 2-3%.
The common technical working principle of the three products is to help reduce surface tension differences within the film at the stage where the resin melts and the viscosity temporarily decreases when the powder coating enters the oven.
As the powder coating melts, the particles fuse together. A short flow window is created in which the surface can smooth out before the film is cross-linked. If surface tension differences, insufficient substrate wetting or local viscosity differences due to pigment/filler are found at this stage, the coating may not spread properly.
As a result, orange peel, crater, fish-eye, irregular gloss, insufficient film closure or local recession may occur.
The polyacrylate phase of the Levelling Agent HL988/HL788/HL505, HL788 and HL505 acts in the coating melt phase, helping to make the surface tension more homogeneous.
In this way, micro-surface irregularities can be reduced before the film hardens.
The coating can spread more evenly. Substrate wetting can improve Gloss can increase.
The fact that these products are silica carriers helps to dose the liquid or adhesive polyacrylate surface additive with powder coating raw materials more easily and to mix them homogeneously in the premix stage.
The silica carrier ensures that the product is available in a free-flowing solid powder form.
During extrusion, the organic polyacrylate phase is dispersed in the resin matrix.
The extrudate is then cooled, ground and powder coating particles are obtained. During application and curing, the polyacrylate phase regulates the film surface behavior. The HL988/HL788/HL505 family is not a curing agent.
It is not a pigment. It is not a main resin. It is not a filler.
It does not have the same function as the classical degassing agent like benzoin.
These products are low-dosage additives mainly used for flow, leveling, wetting and surface appearance control.
They can be used in combination with benzoin because the outgassing/pinhole problem targeted by benzoin is different from the surface runoff problem targeted by the leveling agent.
The HL988/HL788/HL505 product family can be used especially in metal furniture, white goods, electrical equipment, shelving systems, machine parts, general industrial metal components and decorative powder coating applications.
When choosing a product, the question "which product is stronger?" should not be asked.
HL988 can be considered as a high-efficiency general-purpose option with a lower dosage range.
HL788 stands out as a silicone-free grade that aims to keep the adhesion effect to a minimum.
HL505 can be considered as an economical general purpose alternative with a higher level of use.
The actual choice should be made based on resin chemistry, cure system, pigment loading, target gloss, intercoat adhesion needs, cost and existing surface defects.
WHAT IS LEVELLING AGENT HL988/HL788/HL505?
Levelling Agent HL988/HL788/HL505 is a family of polyacrylate-based additives used to improve surface leveling during film formation in powder coating systems.
All three grades are in the general-purpose leveling agent group in the Huangshan Huahui Technology product portfolio.
Levelling Agent HL988/HL788/HL505 are in the same family of manufacturers, but their formulations, active/carrier ratios, and recommended usage levels are not the same.
HL988 is defined as a polyacrylate-based leveling agent on a silica carrier.
HL788 is identified as a silica adsorption polyacrylate flow/levelling agent and is specifically stated as silicone-free.
HL505 is also a silica carrier polyacrylate leveling agent.
Polyacrylate chemistry refers to high molecular weight polymers derived from acrylate monomers.
In some commercial and shipping sources, the organic active phase of HL988, poly(butyl acrylate), has been associated with CAS No 9003-49-0.
However, this information should not be used to assign a single, precise CAS number to all three grades.
HL988, HL788, and HL505 are formulated commercial additives.
They contain silica carrier.
Active polymer/carrier ratios may vary by grade.
Therefore, it is not technically correct to give a single molecular formula, a single molecular weight, or a single CAS number for the entire product family.
The general repeat unit for poly(butyl acrylate) can be denoted as [-CH₂-CH(COOC₄H₉)-]n.
The general repetition unit formula can be expressed as (C₇H₁₂O₂)n.
However, this formula does not refer to the entire HL988/HL788/HL505 commercial mix.
The silica carrier is the inorganic phase.
Polyacrylate is the organic sur-regulatory phase.
In powder coating, these two phases perform different functions.
Silica carrier mainly solid form, easy to transport, dosage and dispersion.
The polyacrylate phase provides true leveling and surface tension control function.
The recommended general use level of HL988 is 0.8–1.2%.
The recommended general use level of HL788 is 1.2–1.6%.
The recommended general use level of HL505 is 2–3%.
These values should be evaluated over the total formulation weight.
A difference in dosage indicates that the active ingredient ratio or carrier structure of the products may be different.
However, exact active ratios should not be assumed without verification from the current manufacturer's TDS or COA document.
The HL788's silicone-free nature can be particularly advantageous for systems that are sensitive to recoating, adhesion, or silicone contamination.
Although HL505 requires higher dosage, it is associated with the advantage of cost reduction in technical resources.
HL988 can be considered a general-purpose high-yield grade with a lower usage level and wide system compatibility.
COMMON PRODUCT AND CHEMICAL NAMES
Levelling Agent HL988/HL788/HL505
Leveling Agent HL988/HL788/HL505
HL988
HL788
HL505
Huangshan Huahui HL988
Huangshan Huahui HL788
Huangshan Huahui HL505
Polyacrylate Levelling Agent
Silica-Carried Polyacrylate Levelling Agent
Powder Coating Flow Agent
CAS NO, EC / EINECS NO AND CHEMICAL IDENTIFICATION
Product family: Levelling Agent HL988 / HL788 / HL505
Manufacturer: Huangshan Huahui Technology Co., Ltd.
Product Class: Powder coating flow and levelling additive
Chemical family: Polyacrylate
Carrier: Silica
Physical form: Powder
Main function: Leveling
Additional function: Flow editing
Additional function: Helping to reduce surface tension
Additional function: Crater control
Additional function: Fish-eye control
Additional function: Substrate wetting development
Additional function: Gloss enhancement
HL988 recommended use level: 0.8–1.2%
HL788 recommended use level: 1.2–1.6%
HL505 recommended use level: 2–3%
HL788 silicon content: Described as silicone-free
HL988 main systems: Epoxy, hybrid, polyester TGIC/HAA, polyurethane
HL788 main systems: Epoxy, hybrid, polyester TGIC/HAA, polyurethane and other powder coatings
HL505 main systems: Epoxy, hybrid, polyester, polyurethane, thermosetting and some thermoplastic powder coatings
CAS No: 9003-49-0 associated with poly(butyl acrylate)
Poly(butyl acrylate) general repeat unit: (C₇H₁₂O₂)n
CHEMICAL STRUCTURE AND MOLECULAR PROPERTIES OF LEVELLING AGENT HL988/HL788/HL505
The active surface regulatory phase of the Levelling Agent HL988/HL788/HL505 family is polyacrylate based.
Polyacrylates are high molecular weight polymers that contain a carbon-carbon main chain and ester side groups.
Considering the Levelling Agent HL988/HL788/HL505 butyl acrylate-based polyacrylate, the ester carbonyl groups provide specific polarity, while the butyl segments support compatibility with organic resin phases.
This combination ensures a controlled compatibility that is not completely soluble in the polymer matrix but also does not exhibit strong macrophase separation.
This balance is important for the leveling agent to work.
If the additive is excessively compatible with the coating matrix, the required enrichment may not occur on the surface.
If it is too incompatible, new defects such as haze, crater, intercoat adhesion problems or surface contamination may occur.
Polyacrylate flow agents help reduce surface tension gradients by moving in the direction of the coating-air interface while the film is molten.
Although this phenomenon is different from classical surfactant adsorption, it has similar principles in terms of surface energy control.
Levelling Agent HL988/HL788/HL505 silica carrier is a solid inorganic carrier besides organic acrylic phase.
This carrier makes powder handling easier.
It allows the liquid acrylic additive to be bagged and enter the dry premix.
During extrusion, the active polymer diffuses into the resin phase.
Shipment data for HL988 shows a composition description that includes colloidal silicon dioxide, butyl acrylate polymer, and a small amount of barium sulfate.
This information supports that HL988 is not the only pure poly(butyl acrylate).
However, the same composition percentages should not be automatically applied to the HL788 or HL505.
It should be noted that the main differences between the three grades may be due not only to the name but also to parameters such as active polymer/carrier ratio, polymer molecular-weight profile and process design.
The main features of the Levelling Agent HL988/HL788/HL505 product family at the molecular and morphological level are as follows:
Being polyacrylate based
Using silica carrier
To be processed in powder form
Contain high molecular weight surface regulatory phase
Powder coating show mobility in the melt phase
Helping to reduce surface tension gradients
Improving flow-out
Reducing the risk of craters
Reduce fish-eye formation
Helping to reduce orange peel
Improving substrate wetting
Supporting gloss and surface smoothness
PHYSICAL AND CHEMICAL PROPERTIES OF LEVELLING AGENT HL988/HL788/HL505
All three products are considered solid powder additives suitable for the powder coating process.
General technical specifications:
Product family: Polyacrylate leveling agents
Carrier: Silica
Physical form: Powder
Typical appearance: White or light-colored powder
Main Application: Powder coatings
Main process: Premix + extrusion
HL988 dosage: 0.8–1.2%
HL788 dosage: 1.2–1.6%
HL505 dosage: 2–3%
HL788 feature: Silicone-free
HL505 feature: General purpose grade with a focus on cost-reduction
HL988 feature: Wide compatibility with low dosage
HL988 suitable systems: Pure epoxy, hybrid, pure polyester TGIC/HAA, polyurethane
HL788 suitable systems: Epoxy, hybrid, polyester, polyurethane and different powder coating systems
HL505 suitable systems: Epoxy, hybrid, pure polyester, polyurethane, thermosetting and thermoplastic powder coatings
Example of polyacrylate phase CAS for HL988: 9003-49-0
Single molecular weight of the product family: None
The only molecular formula of the product family: None
Values such as exact active content, volatile content, bulk density, particle size and moisture should be verified on a grade-based current TDS/COA.
It should not be assumed that these properties are the same across products.
In particular, different levels of use suggest that the active polymer concentration or carrier ratio may be different.
However, active content should not be calculated from dosage alone.
App performance must be verified by real movie testing.
HOW DOES THE LEVELLING AGENT HL988/HL788/HL505 WORK AT THE MOLECULAR LEVEL?
After the powder coating is electrostatically applied to the metal surface, it enters the curing oven.
In the first stage, the dust particles heat up.
The resin softens.
The particles melt and begin to coalesce.
Film viscosity temporarily decreases.
This period is the flow-out window.
If the surface tension is not the same at every point on the film surface, the liquid phase may move towards areas of high surface tension.
This movement may cause local filming.
Crater or fish-eye may occur.
Pigment, filler, contamination, silicone, oil, substrate treatment or different resin components can cause surface tension differences.
The polyacrylate phase of HL988/HL788/HL505 is dispersed in the melt film.
It helps to balance the surface tension differences on the coating-air interface.
The film spreads more controlled.
Micro-roughness can be reduced before hardening.
Substrate wetting develops.
Surface smoothness is elevated.
Gloss can be more homogeneous.
Then the curing reaction accelerates.
Molecular weight increases.
Film viscosity rises.
Surface flow stops.
Therefore, the time interval in which the leveling agent can be effective is limited.
If the cure is too fast, the film may lock before the additive can completely correct the surface imperfections.
In this case, simply increasing the amount of HL988, HL788, or HL505 may not be the right solution.
Resin reactivity, catalyst, cure temperature and film thickness should be examined separately.
Likewise, using too many leveling agents does not provide optimum results.
Excessive surface-active additive intercoat adhesion can create contamination sensitivity or different surface defects.
Therefore, dosage screening is mandatory.
The main functions of the product family at the formulation level:
Flow-out development
Surface tension control
Crater reduction
Fish-eye reduction
Orange peel reduction
Substrate wetting development
Gloss enhancement
Enhancing film smoothness
Creating a smooth decorative finish
Supporting powder coating quality consistency
IN WHICH SECTORS IS THE LEVELLING AGENT HL988/HL788/HL505 USED?
The main sector of use is the powder coatings industry.
Main areas of use:
Epoxy powder coatings
Epoxy/polyester hybrid powder coatings
Polyester/TGIC powder coatings
Polyester/HAA powder coatings
Polyurethane powder coatings
Thermosetting powder coatings
Some thermoplastic powder coatings
Metal furniture
White goods
Electrical panels
Lighting equipment
Shelving systems
Machine Parts
Industrial metal equipment
Decorative metal products
Automotive aftermarket metal components
Home appliance parts
Applications of electrostatic powder coating
Smooth finish coatings
High-gloss coatings
General industrial coatings
The basic application area of the three grades is similar.
However, it should be tested which one is more suitable in the same formulation.
HL988 may require lower dosage.
HL788 can be preferred in systems with silicone-free requirements.
HL505 can be advantageous in cost/performance oriented systems.
USE OF LEVELLING AGENT HL988 IN POWDER COATING APPLICATIONS
HL988 is the general-purpose grade used at a lower dosage in this family.
The recommended general use level is 0.8–1.2%.
It can be used in pure epoxy systems.
It can be used in epoxy/polyester hybrid systems.
It can be used in polyester/TGIC systems.
It can be used in polyester/HAA systems.
It can be used for polyurethane powder coatings.
HL988 helps reduce fish-eye and crater defects.
Coating reduces surface tension.
Improves substrate wettability.
It helps to increase the film gloss.
These features are especially important in systems where a high decorative appearance is required.
Due to its low dosage, it can provide an advantage in terms of the amount of active use in the formulation cost evaluation.
However, the price per kg alone is not sufficient for an economic decision.
The actual cost should be calculated over the percentage of kg additive × usage.
Using the HL988 at too low a level may not provide sufficient leveling.
Overuse can create surface additive overloading.
Therefore, screening 0.8% / 1.0% / 1.2% is the appropriate initial approach.
USE OF LEVELLING AGENT HL788 IN POWDER COATING APPLICATIONS
HL788 is a general-purpose silica carrier polyacrylate flow/leveling agent.
The recommended level of use is 1.2–1.6%.
In the technical sources for the HL788, it is stated that it does not contain silicone composition.
Being silicone-free can provide a significant advantage in terms of coating adhesion.
Silicone-free grade selection can be preferred, especially in systems where second coat paint will be applied or in processes sensitive to surface contamination.
HL788 helps to increase powder coating flow.
The film can enhance clarity and smoothness.
Supports substrate wetting.
It can reduce the appearance of orange peels.
It contributes to the control of crater and fish-eye problems.
There are commercial technical explanations that there is no wetting promoter in the HL788.
Therefore, if there is a special wetting requirement, a separate wetting promoter system can be evaluated.
The dosage range is higher than that of HL988.
This may indicate that the active/carrier ratio or formulation design of HL788 is different.
However, the exact ratio should not be calculated without TDS.
For HL788, the 1.2% / 1.4% / 1.6% screening is an appropriate initial study.
USE OF LEVELLING AGENT HL505 IN POWDER COATING APPLICATIONS
HL505 is a silica carrier polyacrylate leveling agent.
The recommended level of use is approximately 2–3% of the total formulation.
HL505 helps reduce fish-eye and crater defects.
Reduces film surface tension.
Base improves substrate wettability.
It is also associated with the cost reduction advantage in commercial technical resources.
It can be used in epoxy systems.
It can be used in hybrid systems.
It can be used in pure polyester systems.
It can be used in polyurethane systems.
In addition to thermosetting powder coatings, it is also recommended for use for some thermoplastic powder coatings.
The utilization level of HL505 is higher than that of HL988 and HL788.
For this reason, the price of kg should not be looked at only in price comparison.
For example, even if the HL505 has a lower kg price, the actual formulation cost may be different from the 2.5% usage and 1% usage of the HL988.
In addition, the performance target is also important.
For cost-sensitive general industrial coating, HL505 may be suitable.
For a premium smooth/high-gloss system, HL988 or HL788 may be more advantageous.
This selection should be based on actual panel testing.
IS LEVELLING AGENT HL988/HL788/HL505 USED IN FOOD, COSMETICS AND PHARMACEUTICAL APPLICATIONS?
This product family is an industrial powder coating additive.
It is not a food additive.
Cosmetics are not positioned as raw materials.
It is not a pharmaceutical active ingredient or standard excipient.
The fact that polyacrylate or silica components are used in other sectors does not mean that these three commercial grades are suitable for the same fields.
In particular, information can be found on the internet that mixes HL988/HL788/HL505 with polyacrylic acid or carbomer chemistry.
This information does not accurately represent the powder coating grade ID.
The actual commercial position of Levelling Agent HL988/HL788/HL505 is in the field of industrial coatings/powder coatings.
If food-contact coating or medical-device coating is to be applied, the exact regulatory statement must be obtained from the manufacturer.
General polyacrylate CAS number or silica information alone does not provide eligibility.
INDUSTRIAL APPLICATIONS OF LEVELLING AGENT HL988/HL788/HL505
The industrial function of the product family is to control the surface flow during coating film formation.
Main technical functions:
Powder coating levelling
Flow-out development
Anti-crater performance
Fish-eye control
Orange peel reduction
Substrate wetting
Gloss improvement
Surface smoothness
Epoxy powder coating production
Hybrid powder coating production
Polyester powder coating production
Polyurethane powder coating production
Decorative smooth coating production
High-gloss coating production
General industrial coating production
In the premix stage, HL988/HL788/HL505 is homogeneously mixed with other raw materials.
Extrusion is then applied.
It is selected in accordance with the extrusion temperature resin system.
Extremely low temperature can reduce additive dispersion.
Extremely high temperature can increase the risk of premature cure.
The extrudate is cooled.
It is ground.
He is eliminated.
Powder coating is applied electrostatically.
The film is cured.
Performance can be evaluated by the following tests:
60° gloss
20° gloss, high gloss systems
Orange peel
Crater count
Fish-eye
Pinhole
Surface smoothness
Cross-cut adhesion
Impact resistance
Flexibility
Film thickness
Come time
Cure response
Intercoat adhesion
Recoat compatibility
Accelerated weathering if weathering is required
WHAT PROBLEMS CAN THE LEVELLING AGENT HL988/HL788/HL505 SOLVE?
Orange peel
All three grades can help reduce the appearance of orange peel by improving film flow-out.
Crater
Crater formation caused by surface tension difference can be reduced.
Fish-eye
Substrate wetting and surface tension control can reduce fish-eye defect.
Low gloss
As surface smoothness improves, light reflection may become more regular and gloss may increase.
Poor substrate wetting
Polyacrylate leveling agent can support wetting by improving surface spreading.
High filler loading due to poor flow
Leveling agent can help, but if the main problem is very high melt viscosity, resin/filler balance should be regulated separately.
Very fast cure
A leveling agent alone may not be enough.
The cure window should be extended or the resin/catalyst system should be optimized.
Pinhole
HL988/HL788/HL505 is not a direct degassing agent.
Benzoin or other degassing solution may be required.
Intercoat adhesion
In this problem, the surface additive level may be too high.
Especially in systems where recoating is required, the silicone-free feature of the HL788 can be an advantage.
Substrate contamination
The leveling agent can reduce a limited level of surface defect, but oil, silicone, or dirt contamination must be removed in the process itself.
THINGS TO CONSIDER WHEN USING LEVELLING AGENT HL988/HL788/HL505
Exact grade should be verified.
HL988, HL788 and HL505 should not be confused with each other.
The recommended dosage should be used according to grade.
For HL988, an initial range of 0.8–1.2% should be used.
For HL788, an initial range of 1.2–1.6% should be used.
For HL505, a starting range of 2–3% should be used.
Resin chemistry should be verified.
Curing agent type must be recorded.
Pigment loading should be kept constant.
Filler loading should be kept constant.
Film thickness should be kept constant.
The cure schedule should be kept constant.
Premix homogeneity should be ensured.
Extrusion dispersion should be checked.
Interaction with other surface additives should be tested.
The difference in function with benzoin should be taken into account.
If silicone additives are used, contamination and recoat tests should be performed.
The silicone-free advantage of HL788 should be evaluated in the necessary applications.
Gloss should be measured.
Orange peel should be evaluated.
The number of craters and fish-eyes should be followed.
Adhesion should be tested.
If intercoat adhesion is required, it should be evaluated separately.
TDS should be examined.
SDS should be examined.
The COA should be checked.
INITIAL FORMULATION APPROACHES FOR LEVELLING AGENT HL988/HL788/HL505
The following examples are laboratory initial approaches prepared to compare three leveling agent grades within the same powder coating system.
These are not verified commercial prescriptions.
All percentages are the percentage by weight of the final mixture.
Each sample adds up to 100%.
EXAMPLE 1: HL988 EPOXY / POLYESTER HYBRID POWDER COATING
Starting components:
Carboxyl polyester resin: 29.0%
Epoxy resin: 29.0%
Titanium dioxide: 24.0%
Barium sulfate: 16.4%
Levelling Agent HL988: 1.0%
Benzoin: 0.3%
Pigment / tint: 0.3%
Total: 100%
Objective:
To evaluate the low-dosage general-purpose leveling performance of the HL988.
Application approach:
Premix is done.
Extrusion is applied.
The powder is ground to the same particle size.
The same film thickness is applied.
The same cure schedule is used.
60° gloss is measured.
Orange peel is evaluated.
Crater and fish-eye are recorded.
Cross-cut adhesion is tested.
EXAMPLE 2: HL788 EPOXY / POLYESTER HYBRID POWDER COATING
Starting components:
Carboxyl polyester resin: 28.8%
Epoxy resin: 28.8%
Titanium dioxide: 24.0%
Barium sulfate: 16.4%
Levelling Agent HL788: 1.4%
Benzoin: 0.3%
Pigment / tint: 0.3%
Total: 100%
Objective:
To evaluate the surface smoothness, gloss and adhesion behavior of silicone-free HL788.
Application approach:
The same raw material lots are used as the HL988 sample.
The same premix time is applied.
The same extrusion profile is used.
The same particle size distribution is targeted.
The same film thickness is applied.
The same curing is applied.
Gloss is compared.
Orange peel is compared.
Crater and fish-eye are compared.
Cross-cut adhesion is measured.
If recoat is required, intercoat adhesion is also tested.
EXAMPLE 3: HL505 EPOXY / POLYESTER HYBRID POWDER COATING
Starting components:
Carboxyl polyester resin: 28.25%
Epoxy resin: 28.25%
Titanium dioxide: 24.0%
Barium sulfate: 16.4%
Levelling Agent HL505: 2.5%
Benzoin: 0.3%
Pigment / tint: 0.3%
Total: 100%
Objective:
Comparing the higher dosage cost/performance profile of the HL505 with the HL988 and HL788.
Application approach:
The same process is applied as for the other two samples.
Gloss is measured.
Orange peel is evaluated.
Crater and fish-eye count.
Film hardness is checked.
Adhesion is tested.
The leveling agent cost per formula is calculated.
Film performance and cost are compared together.
ALTERNATIVES AND COMPARISON OF LEVELLING AGENT HL988/HL788/HL505
The three products are not directly equivalent to each other on a gram basis.
The basic comparison can be made as follows:
HL988
Lower level of utilization.
About 0.8–1.2%.
Wide thermosetting powder coating compatibility.
Fish-eye and crater control.
Substrate wetting development.
Gloss enhancement.
Potential for high active efficiency due to low dosage.
HL788
Medium usage level.
About 1.2–1.6%.
Silicone-free.
Minimal impact target on adhesion.
Flow and clarity development.
Orange peel reduction.
Recoat or adhesion can be advantageous in sensitive systems.
HL505
Higher level of utilization.
About 2–3%.
Silica-carried polyacrylate.
Thermosetting and some thermoplastic powder coatings.
Fish-eye and crater control.
Substrate wetting development.
Cost reduction oriented grade.
It can be advantageous in economical general-purpose systems.
HL988 VS. HL788
HL988 works with lower dosage.
HL788 requires a higher dosage.
It is clearly stated that HL788 is silicone-free.
For this reason, HL788 can be preferred in adhesion/recoat sensitive applications.
HL988 can be considered as a powerful general purpose option with its film gloss and general leveling performance.
The two products should not be replaced with the same percentage.
HL988 VS. HL505
HL988 is used at a level of approximately 0.8–1.2%.
HL505 is used at a level of approximately 2–3%.
Cost reduction is prominent in the technical positioning of the HL505.
HL988 has a lower utilization rate.
Real economic comparison:
Kg price × formulation usage rate
It should be done over the
Film quality should also be evaluated.
HL788 VS. HL505
HL788 is silicone-free grade.
HL505 is an economical grade with a higher usage level.
The HL788 can be advantageous in applications where adhesion precision is critical.
HL505 can be used in general industrial powder coating systems where cost pressure is high.
The optimal choice should be based on the panel test.
HL988/HL788/HL505 AND RESIFLOW PV88
Resiflow PV88 is an acrylic flow and leveling agent developed for powder coatings.
It helps reduce craters, pinholes and fisheyes defects.
Epoxy can be used for polyester, acrylic, hybrid and polyurethane powder coatings.
The typical dosage range is about 0.5–1.5%.
Therefore, it is a similar alternative to the HL988 family in terms of function.
However, carrier, active polymer and dosage are not the same.
Direct one-to-one substitution should not be made.
HL988/HL788/HL505 AND BYK POLYACRYLATE LEVELING AGENTS
The BYK product family includes different polyacrylate-based surface additives.
These contributions can be used to improve leveling, reduce crater formation, and regulate surface flow.
Some BYK products may be in liquid form.
Levelling Agent HL988/HL788/HL505 has the advantage of silica-carried powder form.
In the powder coating premix process, it may be easier to dose products with solid carriers.
Alternative selection should be made based on physical form, active content, dosage and final film performance.
QUALITY CONTROL AND PURCHASING CRITERIA FOR LEVELLING AGENT HL988/HL788/HL505
Recommended information to review before purchasing:
Full commercial product name
HL988 / HL788 / HL505 exact grade
Manufacturer
Chemical family
Carrier type
Active polymer content
Non-volatile content
Volatile content
Appearance
Color
Particle size
Bulk density
Moisture
Flowability
Recommended dosage
Silicone-free statement, especially for HL788
Epoxy compatibility
Hybrid compatibility
TGIC polyester compatibility
HAA polyester compatibility
Polyurethane compatibility
Thermoplastic compatibility, if required
Gloss performance
Orange peel performance
Crater performance
Fish-eye performance
Adhesion
Intercoat adhesion
Recoat behavior
Storage condition
Shelf life
Packaging
Net weight
Batch number
Production date
Country of origin
TDS
SDS
COA
Having three grades from the same manufacturer does not guarantee the same performance.
Reference formulation should be prepared for supplier or grade change.
The same film thickness and cure condition should be used.
Gloss and surface appearance should be compared.
Adhesion and mechanical properties should be tested.
Formulation cost should be calculated.
Only in this way can technical and economic equivalence be evaluated.
STORAGE AND HANDLING OF LEVELLING AGENT HL988/HL788/HL505
Products should be stored in a dry and closed environment.
It must be protected from moisture.
Once the packaging is opened, it must be tightly closed again.
Direct water contact should be avoided.
It should not be left in direct sunlight.
Extremely hot storage conditions should be avoided.
A clean and dry area where powder coating raw materials are stored should be preferred.
Cross-contamination with other additives or pigments should be avoided.
FIFO should be applied.
Lot traceability must be ensured.
Exact shelf life must be verified from the current manufacturer's TDS.
Transport classification and safety conditions should be checked from the SDS.
LEVELLING AGENT HL988/HL788/HL505 SAFETY INFORMATION
This product family is industrial coating additive in powder form.
Dust formation should be checked.
Proper local ventilation should be used during bag emptying and premixing.
Unnecessary inhalation exposure should be avoided.
Intense dust contact with the eyes should be avoided.
Appropriate gloves and eye protection should be used.
The risk of combustible dust in powder coating production should be evaluated separately on a facility basis.
The safety conditions of other resins, curing agents, pigments and additives should also be taken into account during extrusion.
The SDS information of other polyacrylate products should not be used for HL988/HL788/HL505.
The current SDS document of the exact grade should be taken as basis.
WHAT TO CONSIDER WHEN PURCHASING A LEVELLING AGENT HL988/HL788/HL505?
First of all, the powder coating system to be used should be determined.
Epoxy?
Hybrid?
Is TGIC polyester?
Is HAA polyester?
Polyurethane?
Thermoplastic system?
Then the target surface quality should be determined.
High gloss?
Smooth surface?
Orange peel control?
Crater's problem?
Fish-eye problem?
Is recoat adhesion important?
Cost priority?
These questions directly affect grade selection.
HL988 can be used in systems that require high efficiency due to its lower utilization rate.
HL788 can stand out in systems with silicone-free properties and adhesion sensitivity.
HL505 can be evaluated in cost-sensitive formulations.
The following information should be clarified before ordering:
Exact grade
Target utilization rate
Active ingredients
Carrier system
Silicone-free requirement
Packaging
Estimated order quantity
Producer
Origin
TDS
SDS
COA
Relevant documents if regulatory statement is required
LEVELLING AGENT HL988/HL788/HL505 SUPPLY FROM ATAMAN KIMYA
Levelling Agent HL988/HL788/HL505; It is a polyacrylate-based leveling agent product family used to improve surface flow, leveling and film appearance in Epoxy, Hybrid, Polyester and Polyurethane Powder Coating systems.
Companies that want to get information about the supply of HL988, HL788 or HL505 from Ataman Kimya can request product suitability, current supply conditions, packaging and price information by sharing the resin system, curing agent type, current surface defect problem and target usage level.
HL988 is a low-dosage general-purpose grade with a usage range of approximately 0.8–1.2%.
HL788 is a silicone-free general purpose grade with a usage range of approximately 1.2–1.6%.
HL505 is a cost/performance oriented general purpose grade with a usage range of approximately 2–3%.
Exact grade, manufacturer, origin, carrier type, active content, TDS, SDS and COA information must be verified before ordering.
Sharing the following information in the request for quotation makes it easier to choose the right product:
Powder coating system
Resin type
Curing agent type
Target gloss
Orange peel level
Crater / fish-eye problem
Recoat requirement
Silicone-free requirement
Current leveling agent
Available dosage
Estimated order quantity
Requested packing
Requested technical documents
FREQUENTLY ASKED QUESTIONS ABOUT LEVELLING AGENT HL988/HL788/HL505
What is Levelling Agent HL988/HL788/HL505?
It is a silica-carried polyacrylate leveling agent product family that develops flow and surface leveling in powder coating systems.
Who is the manufacturer?
Huangshan Huahui Technology Co., Ltd.
How much is HL988 used?
Approx. 0.8–1.2% total formulation weight.
How much is HL788 used?
Approximately 1.2–1.6% total formulation weight.
How much is HL505 used?
Approximately 2–3% total formulation weight.
Does HL788 contain silicone?
It is defined as silicone-free in technical product descriptions.
In which systems is HL988 used?
Pure epoxy, hybrid, polyester TGIC/HAA, polyurethane and other thermosetting powder coatings.
In which systems is the HL788 used?
Epoxy, hybrid, polyester, polyurethane and different powder coatings.
In which systems is HL505 used?
Epoxy, hybrid, pure polyester, polyurethane, thermosetting and some thermoplastic powder coatings.
Is HL988/HL788/HL505 the same?
They are in the same product family but with different grades.
Can the three be used with exactly the same percentage?
The recommended usage intervals are different.
What is the advantage of HL988?
Low dosage and wide general purpose use.
What is the advantage of HL788?
Silicone-free construction and adhesion suitable for sensitive systems.
What is the advantage of HL505?
More economical general-purpose approach and wide powder coating compatibility.
Do these products reduce crater?
Through surface tension control, they can help reduce crater formation.
Does it reduce fish-eye?
They can help reduce substrate wetting and film flow by improving it.
Does orange reduce peel?
They can reduce the appearance of orange peels by improving flow-out.
Does it increase gloss?
They can improve gloss through smoother surface formation.
Are they a substitute for benzoin?
Benzoin is degassing agent; these products are leveling agents.
Can it be used with benzoin?
Yes, it can be used in the same formulation due to its different functions.
Why is HL505 used in higher dosage?
Grade formulation and active/carrier design are different. The exact reason must be verified with active-content information.
What is the CAS number of the HL988?
Some commercial and shipping sources associate the polyacrylate phase with poly(butyl acrylate), CAS 9003-49-0. Commercial HL988 is not the only pure chemical.
Can the same CAS be used for HL788 and HL505?
The same CAS number should not be automatically applied without verifying the current exact SDS.
What is the molecular weight of the product family?
They do not have a single molecular weight as they are formulated polymeric products.
Are the products used in food?
It is not a food additive.
Is it used in cosmetics?
Cosmetics are not positioned as raw materials.
Is it used in medicine?
It is not a pharmaceutical active or standard excipient.
How to add?
Powder coating is mixed with other raw materials in the premix stage and dispersed into the resin matrix during extrusion.
Which product is better?
There is no single universal answer. HL988 is aimed at different targets with its low dosage, HL788 silicone-free feature, and HL505 cost/performance advantage.
What documents should be requested?
TDS, SDS, and COA are essential documents.
LEVELLING AGENT HL988/HL788/HL505 – TECHNICAL SUMMARY
Levelling Agent HL988, HL788, and HL505 are Huangshan Huahui Technology's general-purpose polyacrylate leveling agent product family for powder coating systems.
All three products are positioned as polyacrylate surface additives made suitable for use in powder form through a silica carrier.
Their main task is to reduce surface tension differences during the melt-flow phase of powder coating, improve film flow-out, increase substrate wetting, and help reduce surface defects such as crater, fish-eye and orange peel.
HL988 is a lower dosage general purpose grade with a usage rate of approximately 0.8–1.2%.
HL788 is a silicone-free general-purpose grade with a usage rate of approximately 1.2–1.6%, aiming for minimal impact on coating adhesion.
HL505 is a higher dosage and cost/performance oriented general purpose grade with a utilization rate of approximately 2–3%.
HL988 is suitable for pure epoxy, hybrid, polyester TGIC/HAA and polyurethane thermosetting powder coatings.
HL788 can be used in epoxy, hybrid, polyester, polyurethane and different powder coating systems.
HL505 can be used for epoxy, hybrid, pure polyester, polyurethane and both thermosetting and some thermoplastic powder coatings.
These products are not curing agents or degassing agents.
They can be used in combination with degassing additives such as benzoin.
Even though the three grades are in the same chemical family, direct one-to-one weight substitution should not be done due to different usage levels.
Product selection should be made according to resin chemistry, curing agent, target gloss, surface defect type, recoat adhesion, dosage and formulation cost.
When purchasing HL988/HL788/HL505, exact grade, manufacturer, silica carrier, active polymer content, TDS, SDS, COA and actual powder coating performance should be evaluated together.
It is recommended that companies planning to supply this product family from Ataman Kimya confirm the current product and offer conditions by sharing the target resin system, current leveling agent, surface defect problem, target utilization rate and technical document requirements.
