Polyoxyethylene Sorbitan Fatty Acid Ester

Detailed Product Description

Tween series

Composition: polyoxyethylene sorbitan fatty acid ester

Type: non-ionic

Item product	Appearance（25℃）	Acid value (mgKOH/g)	Hydroxy value (mgKOH/g)	Saponification (mgKOH/g)
T-20	light yellow to yellow viscous substance	≤2.0	90-110	40.0-50.0
T -40	light yellow to yellow viscous substance	≤2.0	85-100	40.0-55.0
T -60	Yellow paste	≤2.0	80-105	40.0-55.0
T -80	Brown yellow viscous liquid	≤2.1	65-82	43.0-55.0

Performance and application: they dissolve in water and such organic solvents as methanol, alcohol, isopropanol, glycol etc., no solubility in mineral oil, being a excellent o/w emulsifier. T-20 is widely used as solubilizer, permeate agent and dispersant in medical, cosmetics and food industry. T-60 is widely used as component of polyacrylonitrile fiber finish oil and soften agent for fiber producing, and emulsifier in coat and plastic industries. T-80 is used as emulsifier, wetting agent and diffusant etc., and as blowing promoter in polyurethane foam industry with particular effectiveness.

Span series

Composition: sorbitan fatty acid ester

Type: non-ionic

Item product	Appearance(25℃)	Acid value (mgKOH/g)	Hydroxy value(mgKOH/g)	saponification(mgKOH/g)
S-20	primrose yellow to yellow viscous liquid	≤8.0	330-360	160-175
S-40	yellow waxy substance	≤10.0	255-290	140-160
S-60	yellow flake or waxy substance	≤10.0	240-270	145-160
S-80	yellow brown transparent viscous substance	≤10.0	190-220	140-160

Performance and application: S-20 has little solubility in mineral oil, Isopropanol, tetrachloroethylene and xylene, difficult to solve in water, and is milky solution after dispersion. It is used as W/O emulsifier in medicine, cosmetics and textiles industries. S-40 is used as dispersants of printing ink and oil-emulsifying, emulsifiers of emulsion polymerization, effective additives of water-resistant textile, emulsifier and finishing agent near well in oil field. S-60 is used as constituents of synthetic fiber finish oil, soften agents of fiber post processing, and emulsifiers in plastic and pesticide industry. S-80 is used as finish oil of cord of Nylon and building of finish oil for polyacrylonitrile fiber, and also used in such industries as oil drilling, printing ink, cosmetics, high-grade scouring agent, metal cutting, and machining, in addition, as emulsified explosion and food additives.