industrial products fallintofirsts(or 200 type, the old call pressure stearic acid, after three times
pressure ), middlings (or 400 tupe, the old call two pressure
stearic acid, after twice pressing) as well as third product(or 800
type, old says once pressure stearic acid, after one time squeezing
or not squeeze through. ) firsts and middlings for white wax solid. Stearic acid rarely exist alone
in nature, often in the form ofglyceride, for example, palmitoleostearin exists in most plants and animals,
particularly in the butter oil is the most abundant capital.
stearic acid is orgainc acid it esponding to the alkali create
stearic acid sodium, is a kind of soap.
Specification: national standard GB - 9103-1988 index name (firsts) index 200 (middlings) 400 (third product ) 800
iodine value, g I 2 / is 100 gold than 2.0 4.0 8.0
saponification value, mgKOH/g 206-211 203-214 193 ~ 220
acid value mgKOH/g 205-210 202-212 192-218
chroma( unite Hazen)≤200400 400
freezing point„ƒ57 ~ 54≥54≥52
water% ≤ 0.20 0.20 0.30
inorganic acid,% ≤ 0.001 0.001 0.001
Plastic industry: the stearic acid is widely used in PVC plastic
pipes, plates, profiles, thin film production. It is PVC heat stabilizer, has the very good lubricity and good light, thermal stability. In
plastic PVC pipe, stearic acid helps prevent charking ", "in PVC
thin film process is a kind of effective add heat stabilizers, also
can be prevent finished thin film change color in the sulfide .
Rubber industry: the stearic acid in the compounding of rubber
plays an important role in the process. Stearic acid is the natural
rubber latex, synthetic rubber and extensive application’s
vulcanization surfactant, also used for plasticizers and softener.
In the production process of synthetic rubber use stearic acid as
emulsifier, in manufacturing foam rubber, stearic acid can make
foaming agent, stearic acid also can be used as rubber stripping
Cosmetic industry: the stearic acid for vanishing cream and cold
cream these two kinds of skin care product as emulsification taste, making it into a stable white paste.
Stearic acid is the main raw material in manufacturing almond and
liquid cream . Stearic acid soap ester in cosmetics industry in the