BYK-1690 SD

Byk-1690 SD is utilized in radiation-curing printing inks to manage foam, ensuring clear, precise prints with improved aesthetic appeal.
Byk-1690 SD is specifically designed for radiation-curing systems, including wood coatings, industrial paints, printing inks, and adhesives.
Byk-1690 SD prevents foam formation and entrapped air during mixing of mineral-bound systems; improves surface appearance, avoids pinholes/voids, helps in workability and finishing of cement-based materials.

CAS Number: 7631‑86‑9 
EC Number / EC‑List Number: Not publicly available / Not disclosed (I found no authoritative source giving an EC / EINECS number that is clearly and reliably associated with “BYK‑1690 SD”)
Molecular Formula: Not disclosed (the product is described as a “solid defoamer based on hydrocarbons / silica carrier / hydrocarbons‑based defoamer for mineral binders”) 
Molecular Weight: Not disclosed / Not fixed (since it is a mixture / formulation, not a defined single molecule)

SYNONYMS:
BYK-1690 SD, BYK 1690 SD

Byk-1690 SD is described as a VOC‑free, silicone‑free, solid defoamer (based on hydrocarbons) for minerally‑bound construction material systems.
Byk-1690 SD is supplied as a solid / powder additive, intended to be mixed into the “dry mix” (e.g. dry‑mix mortars, plasters, cementitious premixes).

Byk-1690 SD is VOC- and silicone-free, solid defoamer for minerally bound construction material systems.
Byk-1690 SD is an innovative polymer-based defoamer that is free of aromatics and silicones.

BYK-1690 SD is described on the BYK add-itive guide as a “VOC- and silicone-free, solid defoamer based on hydrocarbons for minerally bound construction material systems.”
Byk-1690 SD is supplied as a solid (powder / dry-mix) additive for dry-mix (mineral-bound) construction-material formulations (e.g. dry-mix mortars, plasters).

Shelf life (unopened) of Byk-1690 SD is given as 18 months under correct storage.
According to a technical document, Byk-1690 SD has a bulk density between 450–650 kg/m³ (as powder).
Byk-1690 SD is a solid (powder) defoamer for mineral-bound construction material systems (dry-mix mortars, plasters, cementitious formulations).

Byk-1690 SD is VOC-free and silicone-free.
Byk-1690 SD is a VOC- and silicone-free hydrocarbon-based solid defoamer for use in mineral-bonded building material systems.
Byk-1690 SD is a non-toxic, and non-abrasive.

BYK-1690 SD is a solid, silicone-free, hydrocarbon-based defoamer for mineral-bonded construction systems.
Available in powder form, Byk-1690 SD contains no volatile organic compounds (VOC < 1500 ppm).
Byk-1690 SD is highly effective even at low dosages and maintains a stable defoaming effect over a long period of time, ensuring a uniform mortar structure and optimal surface properties of the final product.

USES and APPLICATIONS of BYK-1690 SD:
The main function: defoaming / air-release additive — Byk-1690 SD is used to prevent foam formation, entrapped air, improve surface quality, reduce pinholes, and help processing of cementitious / mineral-bound systems.
Byk-1690 SD is explicitly described as VOC-free and silicone-free.

Function / Use: Byk-1690 SD prevents foam formation and entrapped air during mixing of mineral-bound systems; improves surface appearance, avoids pinholes/voids, helps in workability and finishing of cement-based materials.
Byk-1690 SD is designed to be added into the dry mix (powder component) instead of liquid binder; this facilitates easy handling in premixed / dry-blend formulations.

Wood Coatings: Byk-1690 SD is used in radiation-curing wood coatings to control foam, maintain transparency, and achieve a smooth, high-quality finish on wood surfaces.
Industrial Paints: Byk-1690 SD is applied in radiation-curing industrial paints to suppress foam, reduce pinholes, and enhance the performance and appearance of painted industrial products.

Printing Inks: Byk-1690 SD is utilized in radiation-curing printing inks to manage foam, ensuring clear, precise prints with improved aesthetic appeal.
Byk-1690 SD is specifically designed for radiation-curing systems, including wood coatings, industrial paints, printing inks, and adhesives.

Byk-1690 SD delivers excellent foam suppression with spontaneous defoaming action, ensuring high transparency of end products and reducing the tendency for pinholes.
Byk-1690 SD enhances both the performance and aesthetic quality of formulations, making it an ideal choice for manufacturers seeking effective foam control in their applications.

It is recommended to add BYK-1690 SD to the other powder components of the dry mix before mixing with water.
Byk-1690 SD disperses easily, ensuring rapid distribution of the active ingredients.
For optimal results, preliminary testing is recommended to determine the exact dosage based on the specific formulation and application conditions.

Byk-1690 SD is an effective solid, silicone-free, hydrocarbon-based defoamer designed for use in mineral-bonded systems.
Byk-1690 SD prevents foam formation during mixing, improves the density and surface quality of the mortar, increases the strength of the final product, and enhances its storage stability.

Byk-1690 SD combines a blend of paraffinic mineral oils and polyesters adsorbed on an inorganic carrier and exhibits high flowability, making it convenient for use in cement-, gypsum-, and mineral-based systems.

-Construction industry uses of Byk-1690 SD: 
BYK-1690 SD is used as a defoamer for dry construction mixtures, including cement and gypsum compounds, plasters, screeds, tile adhesives, self-leveling floors, and repair mortars.
Byk-1690 SD is particularly effective in mineral construction systems, such as mineral plaster mortars, tile adhesives, and self-leveling compounds (SLU, SLO).
In gypsum and cement systems, Byk-1690 SD helps reduce porosity, improves the surface, and prevents strength loss due to entrapped air.

-Dry mix production uses of Byk-1690 SD:
BYK-1690 SD is added during the dry construction mix preparation stage along with other powder components.
Thanks to its inorganic carrier and balanced formula, Byk-1690 SD is evenly distributed and effective even under intensive mixing conditions.
Typical applications of Byk-1690 SD use a dosage of 0.05 to 0.5% of the total formulation weight, which ensures a stable defoaming effect without adversely affecting the rheology of the mortar.

FEATURES of BYK-1690 SD:
*Superior Foam Control: 
Byk-1690 SD provides excellent foam suppression along with spontaneous defoaming action, effectively addressing foam-related challenges during processing and application.

*Enhances Transparency: 
Byk-1690 SD ensures high transparency of end products, making it suitable for applications where clarity is a critical requirement.

*Reduces Pinholes: 
Byk-1690 SD minimizes the tendency for pinhole formation, improving surface smoothness and overall quality of formulations.

THE COMPOSITION AND PHYSICOCHEMICAL PROPERTIES of BYK-1690 SD:
of BYK-1690 SD are a mixture of paraffinic mineral oils and polyesters adsorbed on an inorganic carrier.
This combination of components ensures high activity and storage stability.
Byk-1690 SD has a bulk density of 450–650 kg/m³ and is supplied as a free-flowing powder with good flowability.
A temperature not exceeding 50°C is recommended for storage and transportation.

FEATURES AND BENEFITS of BYK-1690 SD:
The main advantage of BYK-1690 SD is its versatility and high efficiency at low dosages.
This solid defoamer disperses easily in water, ensuring uniform distribution in cementitious and gypsum systems.
Byk-1690 SD's structure prevents foaming during mixing of the dry mix, promotes the removal of entrapped air, and prevents the formation of air pores in the cement stone.

Byk-1690 SD increases the density of the mortar, improving the surface quality and strength of the final product.
Furthermore, BYK-1690 SD prevents craters on the surface of self-leveling floors and reduces the risk of poor adhesion of tile adhesives due to foam.

PHYSICAL and CHEMICAL PROPERTIES of BYK-1690 SD:
Density (20 °C): 0.80 g/ml
Non-volatile content (10 minutes, 150 °C): 40.5%
Solvent: Isoparaffin
Flash point: 37 °C
In dry mix, typical bulk density: 450–650 kg/m³
Shelf life (unopened): 18 months (under proper storage conditions)
Physical form: Solid (powder / dry‑mix additive)
VOC / Silicone content: VOC‑free, silicone‑free (as per product specification)

Bulk (or loose) density: Reportedly between 450–650 kg/m³ (as a powder) in technical literature
Function / Use: Defoamer / air‑release agent: helps reduce foam/air, improves workability and surface finish in mineral binder systems
Effect at typical dosage: At ~0.5% (on total formulation / dry mix), provides significant defoaming / air-release effect, improving “flow diameter” and reducing surface defects (craters/pinholes) compared to no additive
Compatibility / Application type: Designed for “minerally bound construction material systems” — e.g. dry‑mix mortars, plasters, cementitious systems (not necessarily for pure solvents/coatings)
Description: VOC- and silicone-free, solid defoamer based on hydrocarbons for minerally bound construction material systems

Formulation: Supplied as a solid (powder / dry-mix) additive for dry-mix (mineral-bound) construction-material formulations (e.g. dry-mix mortars, plasters)
Shelf life (unopened): 18 months under correct storage
Bulk density: Between 450–650 kg/m³ (as powder)
Main function: Defoaming / air-release additive — to prevent foam formation, entrapped air, improve surface quality, reduce pinholes, and help processing of cementitious / mineral-bound systems

Product properties: VOC-free, silicone-free
CAS Number: 7631‑86‑9 
EC Number / EC‑List Number: Not publicly available / Not disclosed (I found no authoritative source giving an EC / EINECS number that is clearly and reliably associated with “BYK‑1690 SD”)
Molecular Formula: Not disclosed (the product is described as a “solid defoamer based on hydrocarbons / silica carrier / hydrocarbons‑based defoamer for mineral binders”) 
Molecular Weight: Not disclosed / Not fixed (since it is a mixture / formulation, not a defined single molecule)

FIRST AID MEASURES of BYK-1690 SD:
-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-1690 SD:
-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-1690 SD:
-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-1690 SD:
-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-1690 SD:
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed. 
Dry.

STABILITY and REACTIVITY of BYK-1690 SD:
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature).
-Possibility of hazardous reactions:
No data available