摘要:
Dialkyl peroxides containing at least one epoxy grouping alpha to the peroxide linkage. Such peroxides have been found to be useful as catalysts in the preparation of heat cured polymer systems such as unsaturated polyester resins.
摘要:
Novel tertiary alkyl peresters of tertiary hydroperoxides are used as polymerization initiators wherein the peresters are characterized by the tertiary alkyl group of the acid moiety having at least two alkyl groups of two or more carbon atoms and the tertiary alkyl group of the hydroperoxide has at least five carbon atoms. Typical is the polymerization of certain vinyl monomers such as vinyl chloride.
摘要:
A co-initiator system for polymerization of ethylenically unsaturated monomers comprising a preformed nitrile containing azo compound or symmetrical, diacyl peroxide in combination with an in situ or preformed acyl peroxy alkyl carbonate.
摘要:
A process for polymerizing vinyl chloride and for copolymerizing vinyl chloride and up to 30 percent by weight of comonomers in aqueous suspension under heat and pressure in the presence of a mixture of an acyl sulfonyl peroxide and a perester of the formula ##STR1## wherein R.sub.3, R.sub.4, and R.sub.5 are the same or different alkyl groups of from 1 to about 10 carbon atoms provided not more than one of R.sub.3, R.sub.4, and R.sub.5 is methyl, and R is selected from 2,2-dimethyl propyl and straight chain alkyl of 1-5 carbon atoms.
摘要翻译:在酰基磺酰基过氧化物和式IMA的混合物存在下,在加热和压力下,在水悬浮液中聚合氯乙烯和共聚氯乙烯和高达30重量%的共聚单体的方法,其中R3, R 4和R 5是相同或不同的1至约10个碳原子的烷基,不超过一个R 3,R 4和R 5是甲基,R选自2,2-二甲基丙基和直链烷基 1-5个碳原子。
摘要:
Novel tertiary alkyl peresters of tertiary hydroperoxides are used as polymerization initiators wherein the peresters are characterized by the tertiary alkyl group of the acid moiety having at least two alkyl groups of two or more carbon atoms and the tertiary alkyl group of the hydroperoxide has at least five carbon atoms. Typical is the polymerization of certain vinyl monomers such as vinyl chloride.