Natural fatty acids

What is Polyhydric alcohol?

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Most polyols having a high boiling point, a strong dissolving ability of the polar substance, toxicity, and low volatility and other characteristics of the viscous liquid or crystalline solid. Its boiling point, viscosity and relative density, and the melting point with the molecular weight increases.
Glycerol, trimethylol ethane, pentaerythritol, xylitol, sorbitol and other polyhydric alcohols may be used in the production of alkyd resins, varnish, polyester resins, explosives and other industrial products, and for the synthetic drying oil, adhesives, plasticized agent, a surface active agent is an important intermediate.
Polyhydric alcohol  is usually ethylene glycol (EG), 1,2-propanediol (11. 2 - PG), 1,4 _ Ding L II. Alcohol (BDO>, 1,67 hexyl: II: alcohol (. HD), neopentyl glycol (NPG), dipropylene-glycol '(EG ·), dipropylene glycol (I) PG), trimethylol propane (TMP), and glycerol.
Structural symmetry of glycols such as 1,4-butanediol to prepare polyurethane adhesives have significant crystalline and non-crystalline, is a polyurethane resin obtained, often using 1,2 - propanediol was mixed with ethylene glycol to use. Dipropylene glycol (diethylene glycol) to improve the flexibility of the adhesives.
Dipropylene glycol may also be modified polyurethane adhesive flexibility and corrosion resistance. Neopentyl glycol. Modified polyurethane adhesive corrosion resistance, particularly alkali resistance and hydrolysis resistance. Too flexibility of the polyurethane resin synthesized by the above several dihydric alcohols, and is generally not used alone, but other and the corresponding diol mixing methylpropanediol symmetry molecules Results plum, neopentyl glycol, L, 6 - dimethyl best substitutes than neopentyl glycol and l, 6 - hexanediol cheap.

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Polyhydric alcohol synthetic ester series

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