BYK-A 535

Byk-A 535 is used silicone-free, compatible with solvent-borne and solvent-free systems
Byk-A 535 is used in some food-contact compliant formulations
Byk-A 535 is used defoamer, silicone-free, for use in solvent-free and solvent-based epoxy and polyurethane systems, as well as adhesives.

CAS Number: Not assigned / not publicly defined
EC Number: Not assigned / not publicly defined
Molecular Formula: Not defined (proprietary polymer mixture)
Molecular Weight: Not defined (proprietary polymer mixture)

SYNONYMS:
BYK‑A 535, BYK A 535, BYK‑A535

Byk-A 535 is a targeted, silicone-free antifoam and air-removal additive optimized for solvent-based and solvent-free epoxy and polyurethane systems, including self-leveling floors, polymer concrete, and mineral castings.
This foam-destroying polymer solution provides reliable foam and bubble prevention without the use of silicone, making Byk-A 535 a technologically advanced choice for the production of coatings, adhesives, and compounds that require clean, air-free surfaces and stable processing.

Byk-A 535 is a silicone-free antifoam and deaerator, i.e., a silicone-free additive for removing air and suppressing foam in systems based on epoxy and polyurethane binders, both solvent-based and solvent-free.
Byk-A 535  is a silicone‑free air release / defoamer additive for epoxy and polyurethane systems (solvent‑borne or solvent‑free).

Physical typical values of Byk-A 535 (density ~0.86 g/mL at 20 °C; refractive index ~1.48; viscosity ~344 mPa·s; low vapour pressure; liquid as supplied).
Recommended dosage of Byk-A 535 0.1–1% by weight; functions to prevent foam, bubbles, pinholes; improves air release and final surface quality.

Byk-A 535 is silicone-free defoamer / air release additive for solvent-free and solvent-borne epoxy and PUR-based adhesives and sealants.
Byk-A 535 is a silicon-free solution of foam-destroying polymers.
Byk-A 535 acts as an anti-foaming agent.

Byk-A 535 prevents air bubbles and pinholes.
Byk-A 535 is suitable for use in solvent-borne and solvent-free epoxy and polyurethane coating systems.
Byk-A 535 is a silicone-free, air release additive for solvent-borne and solvent-free epoxy and polyurethane systems.

Byk-A 535 prevents foam and bubbles during the manufacture and application of ambient-curing plastic applications.
Byk-A 535 is particularly recommended for polyurethane-based floorings and casting systems (polymer concrete, mineral casting) that are based on epoxy resins.

Byk-A 535 is suitable for food materials (including drinking water).
The recommended level of Byk-A 535 is 0.1-1% additive (as supplied) based upon total formulation.
Byk-A 535 complies with REACH Regulation (EC) No 1907/2006.

The shelf life of Byk-A 535t is 36 months.
Byk-A 535 is a silicone-free defoamer for solvent-based and solvent-free epoxy, and polyurethane systems.
Byk-A 535 is particularly suitable for use in ambient cured epoxy and polyurethane systems.

Byk-A 535 is often used in the manufacture of polyurethane-based floorings and casting systems, including mineral casting and polymeric concrete.
Byk-A 535 is a silicone-free defoamer for solvent-based and solvent-free epoxy, and polyurethane systems.

Byk-A 535 is a versatile chemical additive used in the paint, coatings, and printing industries to improve the dispersion of pigments and fillers.
Byk-A 535 contributes to the stability, durability, and color intensity of paints, coatings, and inks.
Chemical nature of Byk-A 535: Polymeric antifoam solution, non-silicone

USES and APPLICATIONS of BYK-A 535:
In polymer casting and flooring applications, Byk-A 535 prevents the formation of bubbles and surface defects, acts as an air eliminator and air removal agent for cold-curing systems and systems curing at room temperature, including polyurethane self-leveling floors and epoxy compounds.
Byk-A 535 is used as a silicone‑free air‑release / defoamer additive for solvent‑borne and solvent‑free epoxy and polyurethane (PU) systems.

Byk-A 535 is used to prevent foam and bubbles, promote deaeration, and avoid pinholes or air‑entrapment in coatings, adhesives, sealants, floorings, casting systems.
Byk-A 535 is suitable for systems that may come into contact with food / potable water (food‑contact compliant in relevant regulations), which is highlighted by BYK in its product documentation.

Typical recommended dosage of Byk-A 535 is 0.1–1.0% (as supplied) based on total formulation (depending on system and processing).
Byk-A 535 is part of BYK’s “Defoamers / Air Release Additives / Additives” product family.
Byk-A 535 is suitable for coatings, adhesives, sealants, floorings, casting, and other polymer-based systems; also used in some food‑contact compliant formulations.

Byk-A 535 is used in Ambient-curing Plastic Systems.
Byk-A 535 can be used for materials that come into contact with food and as an additive for floor coatings.
Recommended dosage for Byk-A 535 is 0.1-1% based upon total formulation.

Byk-A 535 prevents foam and air bubbles in epoxy and polyurethane systems
Byk-A 535 improves deaeration and air release
Byk-A 535 avoids pinholes or voids in coatings, adhesives, sealants, floorings, casting systems

Byk-A 535 is used silicone-free, compatible with solvent-borne and solvent-free systems
Byk-A 535 is used in some food-contact compliant formulations
Applications of Byk-A 535: Solvent-free adhesives

Byk-A 535 is used defoamer, silicone-free, for use in solvent-free and solvent-based epoxy and polyurethane systems, as well as adhesives.
Byk-A 535 is particularly suitable for food contact applications, such as inner can coatings.
Byk-A 535 may affect transparency.

Byk-A 535 is silicone-free air-releasing additive for solvent-based and solvent-free epoxy and polyurethane systems.
Application of Byk-A 535: Composites
Byk-A 535 is particularly suitable for use in ambient cured epoxy and polyurethane systems.

Byk-A 535 is often used in the manufacture of polyurethane-based floorings and casting systems, including mineral casting and polymeric concrete.
Byk-A 535 is ideal for food contact coating systems, but may affect transparency.

Byk-A 535 is silicone-free defoamer / air release additive for solvent-free and solvent-borne epoxy and PUR-based adhesives and sealants.
Byk-A 535 is a chemical raw material that can be used as an additive in various applications.
Byk-A 535 is a non-ionic polyurethane additive that acts as a dispersant and wetting agent.

Byk-A 535 is frequently used in the paint and coatings industry to improve the dispersion of pigments and fillers.
Byk-A 535 helps achieve a uniform distribution of particles and increases the stability of paints and coatings.

Using Byk-A 535can result in improved durability, gloss, and color strength in paints and coatings.
Furthermore, Byk-A 535 is used in the printing industry, particularly in ink production.
Byk-A 535 improves the dispersion of pigments in inks and ensures even distribution on the printing medium.

This allows inks to achieve better color intensity and print quality.
Unfortunately, the physical properties such as density and flash point of Byk-A 535 are not known.

-Paint and varnish industry uses of Byk-A 535 :
In industrial and protective coatings based on epoxy and polyurethane binders, including self-leveling floors, Byk-A 535 acts as a defoamer and deaerator for both solvent-based and solvent-free systems.
Byk-A 535 prevents the formation of bubbles and pinholes, stabilizes the coating surface, and helps eliminate foam in polyurethane compounds and bubbles in epoxy self-leveling floors.

-Adhesives and sealants use of Byk-A 535:
In adhesives and sealants, Byk-A 535 is effective as a defoamer for solvent-free sealants and as an additive for solvent-based adhesives, acting as an air eliminator and deaerator for epoxy systems and polyurethanes.

-Polymer composites and compounds use of Byk-A 535:
In polymer concrete and mineral casting, Byk-A 535 is a polymer concrete admixture and deaerator for highly filled systems, helping prevent foam and bubble formation, thereby reducing surface defects in polymer concrete.
In cold-curing epoxy and polyurethane systems, Byk-A 535 helps improve air removal from viscous systems and consistently reduces foaming.

-Recommended use of Byk-A 535:
The recommended addition rate of Byk-A 535 is 0.1–1% of the total formula weight.
For optimal coating results, Byk-A 535 is advisable to add the additive to the mill paste; if added later, ensure sufficient shear forces to ensure uniform distribution and prevent cratering.

In adhesives and compounds, Byk-A 535 is typically mixed into the resin before the other components are added.
Byk-A 535 can also be added to ready-made systems; however, laboratory testing is mandatory due to the sensitivity of transparent systems, where it may cause clouding in transparent epoxy systems and may cause clouding in transparent systems.

USES, BENEFITS, APPLICATIONS & HANDLING of BYK-A 535:
Byk-A 535 is used when you want to produce epoxy or polyurethane coatings, adhesives, sealants, floorings, casting or protective coatings — solvent-borne or solvent-free — and you want to ensure that no trapped air or foam remains in your cured material.
Byk-A 535 helps air release / deaeration, preventing foam bubbles, pinholes, or voids during mixing, curing or application.

Because it's silicone‑free, Byk-A 535 is especially suitable for systems where silicone-based defoamers would cause defects (like cratering) or compatibility issues.
Recommended typical use level of Byk-A 535 is 0.1–1% (by weight of total formulation) (though optimal dosage should be determined via lab tests for each formulation).

When added properly (ideally into the mill‑base before other components, or thoroughly dispersed if added later), Byk-A 535 helps produce smooth, defect‑free coatings / adhesives / sealants with good mechanical and visual quality.
Because Byk-A 535 is also approved / suitable for some food‑contact applications (when formulations require such compliance), it can be used in coatings or systems intended for contact with potable water or food-related surfaces — subject, of course, to the full formulation compliance.

FEATURES of BYK-A 535:
*Defoamer
*silicone-free

BENEFITS / CHARACTERISTICS of BYK-A 535:
*Smooth surface finish without air defects
*Byk-A 535 improves mechanical and visual quality of cured material
*Low dosage required (0.1–1% by weight of total formulation)
*VOC-free (if formulation is compatible)
*Compatible with various polymer-based systems

THE COMPOSITION AND PHYSICOCHEMICAL PROPERTIES
of Byk-A 535 are a silicone-free solution of foam-destroying polymers, effectively a polymer defoamer and deaerator.
Typical properties include: density at 20°C: 0.86 g/ml; refractive index at 20°C: 1.475.
The composition effectively destroys foam and improves air removal from viscous systems, including highly filled formulations, polymer concrete, mineral castings, and other filled compounds.

FEATURES AND BENEFITS of BYK-A 535:
The key feature of Byk-A 535 is its combination of stable antifoaming action and effective air release across a wide range of systems: from solvent-based adhesives and sealants to solvent-free epoxy flooring and polyurethane systems.

Byk-A 535 prevents bubbles, craters, and pinhole-type defects on coating surfaces, reducing the risk of foaming during production and application, which is especially important for polymer concrete and mineral castings, where air entrapment in filled resins is critical.
Clouding may occur when used in transparent systems; this should be taken into account when selecting the dosage and application area.

BENEFITS of BYK-A 535:
*Removing air bubbles
*Creating a surface without pinholes

SPECIAL FEATURES AND BENEFITS of BYK-A 535:
Air release additive to prevent foam and bubbles during the manufacture and application of ambient-curing plastic applications.
Particularly recommended for polyurethane-based floorings and casting systems (polymer concrete, mineral casting) that are based on epoxy resins.
Byk-A 535 is suitable for materials that come into contact with food (including drinking water).

RECOMMENDED LEVELS of BYK-A 535:
0.1-1% Byk-A 535 (as supplied) based upon total formulation.
The above recommended levels of Byk-A 535 can be used for orientation.
Optimal levels of Byk-A 535  are determined through a series of laboratory tests.

INCORPORATION AND PROCESSING INSTRUCTIONS of BYK-A 535:
Stir Byk-A 535 into the resin before adding other components.
Byk-A 535 is also possible to add the additive to finished systems.

SPECIAL FEATURES AND BENEFITS of BYK-A 535:
Byk-A 535 is particularly suitable for solvent-free systems such as polyurethane and epoxy coatings and for materials that come into contact with food (including drinking water).
Byk-A 535 prevents air bubbles and pinholes.
Byk-A 535 may cause cloudiness in transparent systems.

PHYSICAL and CHEMICAL PROPERTIES of BYK-A 535:
Physical form (as supplied additive): Liquid (solution of foam‑destroying polymers, silicone‑free)
Density (20 °C): ~ 0.86 g/mL (0.86 g/cm³)
Refractive index (20 °C): ~ 1.48 (some sources 1.475)
Appearance (as supplied): Colorless, clear liquid
Viscosity (20 °C): ~ 344 mPa·s (from one SDS listing)
Vapour Pressure (20 °C): ≤ 0.1 hPa (low volatility)
Melting Point (if relevant): ≤ 0 °C (not really relevant for liquid additive) — listed in SDS as “max. 0 °C (derived)”

Boiling / Auto‑Ignition / Flash‑point (SDS data, approximate/minimums): Boiling point ≥ 150 °C; 
auto‑ignition ≥ 200 °C; flash point (closed cup) ≥ 150 °C (as per one SDS)
Miscibility / Solubility: Immiscible in water (i.e. hydrophobic / non‑water‑soluble)
Product type: Silicone-free air-release / defoamer additive
Form: Liquid (solution of foam-destroying polymers)
Color / Appearance: Colorless, clear liquid
Density (20 °C): ~0.86 g/mL
Refractive index (20 °C): ~1.48

Viscosity (20 °C): ~344 mPa·s
Vapour pressure (20 °C): ≤0.1 hPa
Boiling point: ≥150 °C
Flash point (closed cup): ≥150 °C
Auto-ignition temperature: ≥200 °C
Water solubility: Immiscible / hydrophobic
Shelf life: 36 months (unopened, proper storage)

FIRST AID MEASURES of BYK-A 535:
-Description of first-aid measures
*General advice:
Show this material safety data sheet to the doctor in attendance.
*If inhaled:
After inhalation: 
Fresh air.
*In case of skin contact: 
Take off immediately all contaminated clothing. 
Rinse skin with
water/ shower.
*In case of eye contact:
After eye contact: 
Rinse out with plenty of water. 
Call in ophthalmologist. 
Remove contact lenses.
*If swallowed:
After swallowing: 
Immediately make victim drink water (two glasses at most). 
Consult a physician.
-Indication of any immediate medical attention and special treatment needed.
No data available

ACCIDENTAL RELEASE MEASURES of BYK-A 535:
-Environmental precautions:
Do not let product enter drains.
-Methods and materials for containment and cleaning up:
Cover drains. 
Collect, bind, and pump off spills. 
Observe possible material restrictions. 
Take up dry. 
Dispose of properly. 
Clean up affected area.

FIRE FIGHTING MEASURES of BYK-A 535:
-Extinguishing media:
*Suitable extinguishing media:
Carbon dioxide (CO2) 
Foam 
Dry powder
*Unsuitable extinguishing media:
For this substance/mixture no limitations of extinguishing agents are given.
-Further information:
Prevent fire extinguishing water from contaminating surface water or the ground water system.

EXPOSURE CONTROLS/PERSONAL PROTECTION of BYK-A 535:
-Control parameters:
--Ingredients with workplace control parameters:
-Exposure controls:
--Personal protective equipment:
*Eye/face protection:
Use equipment for eye protection. 
Safety glasses
*Body Protection:
protective clothing
*Respiratory protection:
Recommended Filter type: Filter A 
-Control of environmental exposure:
Do not let product enter drains.

HANDLING and STORAGE of BYK-A 535:
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed. 
Dry.

STABILITY and REACTIVITY of BYK-A 535:
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature).
-Possibility of hazardous reactions:
No data available