Organotin Catalysts — Bis(dodecylthio)dibutyltin

2021-11-23   Pageview:665

Bis(dodecylthio)dibutyltin is a strong gel catalyst with good hydrolytic stability, catalytic activity than dibutyltin dilaurate, storage stability, used in microcontrolled elastomers and hard foam.












The pentaerythritol used in fire-retardant coatings mainly acts as a charring agent (carbon source) and flame retardant, and can improve the flexibility of fire-retardant coatings. Glycerol Glycerol, also known as glycerin, is a colorless, transparent, odorless, sweet-tasting viscous liquid, molecular formula Cg HaO, relative molecular mass 92.09,

CH: OH glycerol is hygroscopic, soluble in water or ethanol, but insoluble in chloroform water based carnauba wax or ether. Relative density (25℃) 1.2569, melting point 18.17℃, boiling point 290℃ (decomposition), flash point (open cup) 177℃, ignition point 18℃, density 1.261g/cm, spontaneous ignition point 392.8℃, refractive index (nzhi) 1.474 , Viscosity (20℃) 1499mPa*s, vapor pressure (100℃) 26Pa, surface tension (20℃) 63.4mN/m. It is miscible with water and ethanol, the aqueous solution is neutral, soluble in 11 times of ethyl acetate, about 500 times of ether, and insoluble in benzene, chloroform, carbon tetrachloride, carbon disulfide, petroleum ether, and oils.

Glycerol is mainly used as a carbonizer (carbon source) and flame retardant in fire retardant coatings. It can also act as a dispersant, penetrant and leveling agent in fire retardant coatings. It is often used in intumescent transparent fire retardant coatings.

Starch Starch is a white, odorless, tasteless powder with a molecular formula (C, HoO;) / and a density of 1.499~1.513g/cm. It is hygroscopic and insoluble in cold water, ethanol and ether. 10%-20% is soluble in hot water (amylose), most of amylopectin is insoluble. The quality indicators are as follows:

Super grade one grade two moisture/%
≤ Acidity/(mg KOH/g)≤ Ash/%
≤ protein/%
0.350.500.80 spots (the number of spots per square centimeter) 0.42
Fineness (100 mesh sieve passing rate)/%≥99.999.098.0 fat/%
≤ Color
White or slightly yellow shaded starch is used in fire retardant coatings mainly as a carbonizer (carbon source) and flame retardant, and is often used in intumescent transparent fire retardant coatings.


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