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FOERFARANDE Foer FRAMSTAELLNING AV Homosexuals and KOPOLYMERER AV vinylchloride in EN YMPAD MICRO SUSPENSION
FOERFARANDE Foer FRAMSTAELLNING AV Homosexuals and KOPOLYMERER AV vinylchloride in EN YMPAD MICRO SUSPENSION
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机译:沉淀微悬浮液中氯乙烯混合物的制备及制备方法
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摘要
Preparation of vinyl chloride homo- and copolymers in latex form. a ymerisation is carried out in microsuspension of the corresponding monomer(s) in an aqueous medium in the presence of at least one seeding product prepared beforehand by polymerisation in microsuspension. Vinyl chloride is introduced into the aqueous medium so that the vinyl chloride present in the said medium in monomeric form, during 50 to 100 % of the duration of the polymerisation period, represents not more than 30% of the vinyl chloride used. The process makes it possible to reduce the quantity of build-up formed, without lowering the degree of conversion of the monomer(s) used and without resulting in a longer polymerisation period.
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