BYK-1730

BYK-1730 is a silicone-free surface additive designed to improve substrate wetting, leveling, and coating uniformity in waterborne and solventborne systems.
BYK-1730 reduces surface tension within the formulation, enabling coatings to spread more evenly across difficult or low-energy surfaces that normally resist proper wetting.
BYK-1730 is used in architectural coatings, wood and furniture coatings, industrial coatings and printing inks. 

CAS Number: 2493-02-9
Molecular Formula: C7H4BrNO
Molecular Weight: 198.02
EINECS Number: 219-662-9

Synonyms: P-BROMOPHENYL ISOCYANATE;p-Bromophenylcarbonimide;1-bromo-4-isocyanato-benzen;1-Bromo-4-isocyanatobenzene;Benzene, 1-bromo-4-isocyanato-;Isocyanic acid p-bromophenyl ester;isocyanicacid,p-bromophenylester;p-Bromocarbanil 

BYK-1730 is a mixture of foam destroying polysiloxanes and hydrophobic solids in polyglycol. 
BYK-1730 is especially suited for pigmented emulsion systems based on styrene/acrylics, acrylics or acrylic/polyurethanes with PVC‘s of 18-25%. 
BYK-1730 can also be used in amine-neutralized systems and is very efficient against microfoam. 

Mixture of foam destroying polysiloxanes and hydrophobic solids in polyglycol. 
Acts as a VOC-free, silicone based defoamer for aqueous systems. Exhibits very good efficiency against microfoam. 
BYK-1730 is a mixture of foam destroying polysiloxanes and hydrophobic solids in polyglycol. 

BYK-1730 is especially suited for pigmented emulsion systems based on styrene/acrylics, acrylics or acrylic/polyurethanes with PVC‘s of 18-25%. 
It can also be used in amine-neutralized systems and is very efficient against microfoam.
BYK-1730 has an established history of innovation such as being the first additive manufacturer to begin using Controlled Polymerization Technology (CPT), launching the first rheology-modified wax emulsion, and being one of the first companies to use nanotechnology for improving Coatings properties. 

BYK-1730 invests approximately 7.5% of its earnings in R&D—three times more than the industry average.
This results in smoother films with fewer defects such as craters, pinholes, and incomplete coverage.

BYK-1730 does not causes turbidity in clears and hazing in pigmented systems. 
Produces a long wave effect and avoids cratering. 
Suitable for high-quality pigmented and non-pigmented industrial coatings. 

BYK-1730 can also be blended with other surface modifiers to create synergistic effects that further enhance gloss, smoothness, and mechanical durability.
BYK-1730 is a high-performance silicone-containing surface additive designed to improve slip, surface smoothness, and leveling in a wide range of coating systems.
It is typically used in solvent-borne, aqueous, and UV-curable coatings to enhance surface flow and reduce surface defects such as craters, pinholes, and uneven film formation.

Its silicone structure allows it to migrate to the coating surface, where it forms a lubricating layer that improves surface properties.
The additive reduces the coefficient of friction on coated surfaces, giving them a smoother and more scratch-resistant finish.
This improved slip behavior helps prevent damage during manufacturing, handling, packaging, and transportation of coated materials.

These performance enhancements are especially valuable for wood coatings, industrial coatings, automotive coatings, and plastic coatings.
BYK-1730 enhances leveling by reducing surface tension differences within the coating film as it levels during drying or curing.
This effect helps eliminate visible surface irregularities and contributes to a more uniform, glossy appearance.

The result is a smoother, defect-free coated film that meets higher aesthetic and quality standards.
The additive is particularly effective in formulations that require strong wetting performance without the slip or surface modification effects associated with silicone additives.

BYK-1730s balanced chemistry supports uniform film formation while maintaining the original surface characteristics of the coating system.
This makes it suitable for applications where silicone migration, gloss changes, or surface incompatibilities must be avoided.

Melting point: 42–44 °C (lit.)
Boiling point: 158 °C / 14 mm Hg (lit.)
Density: 1.6077 (rough estimate)
Refractive index: 1.5500 (estimate)
Flash point: 229 °F
Storage temp.: Refrigerator (+4 °C)
Solubility: Very slightly soluble in diethyl ether
Form: Crystalline solid
Color: White to light beige
Water solubility: Sparingly soluble in water (0.40 g/L at 25 °C)
Sensitive: Moisture sensitive

BYK-1730 enhances the flow and leveling behavior of coatings by promoting the redistribution of material during drying.
This leads to flatter, more visually appealing surfaces with improved gloss and reduced texture defects.
Coatings using this additive typically show increased clarity, uniformity, and aesthetic quality.

BYK-1730 is widely used in automotive coatings, industrial coatings, wood coatings, and plastic coatings where precision surface quality is required.
Its ability to wet challenging substrates such as plastics, metals, and coated surfaces makes it useful in multi-layer coating systems.
These properties help formulators achieve strong adhesion and smooth film build in complex coating applications.

BYK-1730 is compatible with clear coats and pigmented systems because it does not cause haze, cloudiness, or undesirable surface changes.
Its silicone-free nature prevents issues like intercoat adhesion problems or contamination in sensitive production environments.
This compatibility makes it valuable for high-performance coatings requiring strict control over surface characteristics.

BYK-1730 only causes a minor reduction in surface tension and does not negatively influence the recoatability and intercoat adhesion. 
BYK-1730 is suited for high quality pigmented and non-pigmented industrial coatings. 
BYK-1730 does not cause turbidity in clear coats or haze in pigmented systems. 

BYK-1730 is also used in plastic coatings where it helps reduce stick-slip behavior that can occur on polymer surfaces.
This enhancement contributes to smoother interactions between coated surfaces and moving components in industrial or consumer applications.
Such performance benefits are valuable in automotive interiors, appliance housings, and electronic device coatings.

BYK-1730 is often used to improve the application behavior of coatings on substrates with low surface energy such as polyethylene, polypropylene, and various engineered plastics.
Its strong wetting power helps the coating spread uniformly over these difficult surfaces, preventing defects caused by poor adhesion or incomplete coverage.
This makes it especially valuable in industries that require coatings for plastic components with complex geometries or textured surfaces.

The additive also supports uniform pigment orientation and distribution by enhancing wetting at the pigment–binder interface.
Improved pigment wetting leads to stronger color development, higher opacity, and smoother visual appearance across the coated surface.
This makes BYK-1730 an important component in high-quality decorative and industrial paints.

BYK-1730 is frequently used in the automotive sector where multi-layer coatings depend on perfect intercoat wetting to ensure consistent gloss and smoothness.
Its ability to improve flow between layers helps prevent issues such as edge crawling, fisheyes, or surface shrinkage.
These improvements contribute to the flawless high-gloss finishes expected in automotive refinishing and OEM coating lines.

The additive enhances leveling behavior in waterborne systems, which often struggle with surface tension differences that cause uneven drying patterns.
By promoting controlled spreading and redistribution, it helps eliminate visual defects like orange peel, rippling, or ridges in the final coating film.
This results in coatings with enhanced aesthetic value and improved tactile smoothness.

BYK-1730 is widely used in industrial metal coatings where uniform coverage is essential to achieve proper corrosion protection.
Better wetting ensures complete film formation on rough, porous, or irregular metal surfaces that might otherwise leave exposed areas uncoated.
This contributes to longer service life and greater durability of metal components in harsh environments.

The additive is useful in wood coatings where variations in wood porosity can cause inconsistent wetting and film penetration.
Its surface tension-lowering properties help coatings spread evenly across dense, open-grain, or knotty wood areas without soaking unevenly.
This uniform coverage enhances the clarity, smoothness, and appearance of transparent and semi-transparent wood finishes.

BYK-1730 is preferred in systems where silicone contamination is not allowed, such as electronics coatings, adhesive bonding applications, and specialty printing.
Because it is silicone-free, it does not interfere with adhesion, cure behavior, or surface cleanliness requirements.
This makes it a safe choice in tightly controlled manufacturing environments where silicone residues are unacceptable.

Uses Of BYK-1730:
BYK-1730 is widely used to improve wetting on low-energy substrates such as plastics, metals, and coated surfaces.
Its ability to reduce surface tension allows coatings to spread uniformly even on difficult materials that normally resist proper coverage.
This makes it valuable in automotive parts, plastic components, and industrial surfaces requiring complete and even film formation.

The additive is used to enhance leveling in coatings by promoting smooth redistribution of the coating during drying.
This improved leveling minimizes defects such as orange peel, craters, and surface irregularities that can occur in waterborne and solventborne systems.
These benefits lead to glossier, smoother, and more visually appealing coating finishes.

BYK-1730 is often used in pigmented systems to improve pigment wetting, helping colorants disperse more evenly within the binder.
Better pigment wetting leads to stronger color development, higher opacity, and improved uniformity across the coated surface.
This makes the additive useful in decorative paints, industrial coatings, and multi-color formulations.

BYK-1730 is used in automotive coatings where multiple layers must flow together smoothly without defects.
Its wetting performance ensures that primers, basecoats, and clearcoats spread evenly and maintain strong intercoat adhesion.
This helps manufacturers achieve high-gloss, premium surface finishes demanded in automotive OEM and refinishing industries.

BYK-1730 is used in industrial metal coatings to ensure uniform coverage across rough, porous, or oxidized metal surfaces.
Complete wetting reduces the chances of uncovered areas that could lead to corrosion or coating failure.
This enhances the long-term performance and durability of protective metal coatings.

The additive is frequently used in wood coatings to address variations in wood porosity that can cause inconsistent surface wetting.
Its surface-tension-lowering capability helps coatings spread smoothly across dense, open-grained, or knotty wood regions without absorbing unevenly.
This creates clearer, more uniform finishes in transparent, semi-transparent, and pigmented wood coatings.

BYK-1730 is used in electronics, adhesives, and specialty coatings where silicone-containing additives are not allowed.
Because it is silicone-free, it avoids issues such as intercoat adhesion failure, contamination, or cure inhibition that silicone materials can introduce.
This makes it suitable for precision applications where film purity and chemical compatibility are critical.

BYK-1730 is employed alongside other additives to fine-tune formulation properties without affecting clarity, gloss, color stability, or cure behavior.
Its high compatibility allows it to be incorporated into clear coats, pigmented systems, and specialty functional coatings.
This versatility makes it a preferred additive in multi-component high-performance coating systems.

BYK-1730 is used in furniture and parquet coatings to enhance the slip properties of wooden surfaces, making them more resistant to everyday wear and mechanical contact.
The silicone modification helps reduce the appearance of drag marks left by cleaning tools, shoes, or moving objects.
BYK-1730 is used to prevent coating defects on contaminated or partially greasy surfaces by improving wetting and allowing the coating to overcome surface impurities.

This helps coatings adhere uniformly even when substrates are not perfectly clean or show variations in surface energy.
Such performance is especially useful in industrial environments where perfect substrate preparation is difficult.
The additive is commonly used in fast-drying coatings to help the film level before solvents evaporate or water flashes off.

This ensures that rapid-dry formulations still achieve smooth, defect-free surfaces despite limited leveling time.
These benefits are particularly important in high-speed production lines where efficiency and surface quality must be balanced.
BYK-1730 is used in coil coatings and metal strip coatings where uniform wetting is critical for complete surface protection.

Its strong wetting performance ensures that coatings spread evenly along long, continuous metal sheets moving rapidly through coating stations.
This improves long-term corrosion resistance and enhances the durability of coated metals exposed to harsh environments.

The additive is frequently incorporated into printing coatings to improve ink adhesion and flow on challenging surfaces.
Enhanced wetting allows printed layers to anchor more effectively, resulting in sharper images and better print clarity.
This makes it beneficial for packaging films, specialty labels, and coated papers.

BYK-1730 is used in waterborne coatings that typically suffer from higher surface tension compared to solventborne systems.
By lowering the surface tension, it helps waterborne formulations mimic the flow and smoothness of traditional solvent-based coatings.
This enables manufacturers to switch to environmentally friendly coatings without sacrificing performance.

The product is used in adhesives and sealants to improve substrate wetting and promote stronger bonding on non-polar or smooth surfaces.
Better wetting ensures intimate contact between the adhesive and the substrate, which is essential for high-strength adhesion.
This makes it useful in plastic bonding, composite assemblies, and industrial sealing applications.

BYK-1730 is incorporated into clear coatings where transparency and visual clarity are critical.
Because it is silicone-free and non-clouding, it improves leveling without introducing haze or surface distortion.
This makes it ideal for high-gloss varnishes, decorative topcoats, and transparent protective films.

BYK-1730 is used in the synthesis of mixed bisamide derivative and monoamide product.
BYK-1730 is widely used as a slip additive in coatings to reduce surface friction and create smoother, more touch-friendly coated surfaces.
Its silicone-based structure migrates to the surface and forms a lubricating layer that improves glide, feel, and handling performance.

Safety Profile Of BYK-1730:
BYK-1730 is generally considered a low-hazard additive, but it can cause mild skin irritation when it comes into prolonged contact with unprotected skin.
This irritation may appear as dryness, redness, or slight discomfort due to the presence of surfactant-like components in the formulation.
Wearing protective gloves during handling helps minimize unnecessary skin exposure.

BYK-1730 may cause temporary eye irritation if splashes occur during mixing, transferring, or application processes.
Its wetting-active ingredients can disrupt the tear film and lead to stinging, watering, or mild redness.
Using protective goggles or face shields reduces the risk of accidental exposure.

BYK-1730 is generally considered a low-hazard additive, but it can cause mild skin irritation if it comes into prolonged contact with unprotected skin.
The irritation usually presents as dryness or slight redness because the formulation contains silicone-modified components and wetting agents.
Using protective gloves during handling helps reduce unnecessary skin exposure.

The product may cause temporary eye irritation if splashes occur during mixing, transferring, or spraying operations.
Inhalation of mist or vapor generated during spray applications may cause respiratory tract irritation.
Workers may experience coughing, throat dryness, or minor breathing discomfort if ventilation is poor in the coating area.

Good air circulation and appropriate respiratory protection help maintain safe working conditions.
Spills of BYK-1730 can create slippery surfaces because its surface-active nature forms a low-friction film after drying.

Such slippery areas can increase the risk of falls or accidents around coating equipment and floor surfaces.
Prompt cleaning with water and detergents helps prevent slip hazards and maintain workplace safety.