Nippon Oil Fats Co., Ltd.

Nof Corporation

Tomoyuki Nakamura

Shuji Suyama

Masaki Hayashi

Hiroyuki Nagai

Hiroshi Okada

Norihisa Ujikawa

Yasumasa Watanabe

Mieko Takei

Yasushi Sugihara

A hydroxyl-modified ethylene-&#x3b1;-olefin copolymer with excellent coating properties and adhesion properties are produced by heating a mixture containing 100 parts by weight of an ethylene-&#x3b1;-olefin copolymer and 0.1 to 20 parts by weight of a peroxide having a hydroperoxy group. The heating temperature is adjusted within a range from the 10-hour half-life temperature to the 1-minute half-life temperature of the peroxide.

Method for producing hydroxyl-modified ethylene-&#x3b1;-olefin copolymer

Alkoxyamines containing a vinyl group as represented by the following general formula (1) are produced in a method which comprises a process of heating divinyl benzene, nitroxide compound and organic peroxide up to a temperature at which the organic peroxide decomposes thermally:(In the formula, Rrepresents an aryl group or an RO group, wherein Rrepresents a linear or branched alkyl group having 1-12 carbon atoms or a cycloalkyl group. Rand Rare each tertiary alkyl group having 4-6 carbon atoms or of cyclic structure where Rand Rare connected with each other having a total carbon number of 8-16. In case of cyclic structure, they are optionally substituted either by an alkyl group, an oxo group, a hydroxyl group, an acyloxy group or an alkoxy group.) Furthermore, graft polymers can be produced by the use of high molecular radical polymerization initiators from which an alkoxyamine group suspends.

Alkoxyamines containing a vinyl group, their applications and methods of their production

An organic peroxide consisting of 1 to 30 repeating units represented by the formula ##STR1## wherein R stands for one group selected from the class consisting of ethylene, acetylene, cyclohexylene, and phenylene groups and one of 1 and m stands for an integer of at least 1 and 1+m stands for an integer in the range of from 6 to 220. Polymerization initiator for a vinyl monomer consisting of the organic peroxide mentioned above. A method for polymerizing a vinyl monomer by using the polymerization initiator mentioned above.

Organic peroxide and use thereof

A novel peroxy ester represented by the general formula (I): ##STR1## is useful as a polymerization initiator for vinyl chloride monomer.

1-phenylcyclohexylperoxy neoalkanoates and use thereof

A polyvinyl chloride polymer or copolymer having excellent thermal resistance and being free from FEs and offensive smell can be obtained in a high yield through a polymerization reaction of vinyl chloride monomer alone or together with a vinyl monomer copolymerizable therewith by the use of a combination system polymerization initiator consisting of (A) .alpha.,.alpha.'-bis(neodecanoylperoxy)-diisopropylbenzene, and (B) at least one of peroxy ester, diacyl peroxide and peroxy dicarbonate, each of which has a 10-hour half-life period temperature within the range of 40.degree.-65.degree. C. in its 0.1 mol concentration solution in benzene.

Method of polymerizing vinyl chloride

A novel peracid ester represented by the general formula (I): ##STR1## is useful as a polymerization initiator for vinyl chloride monomer, a curing agent for unsaturated polyester resin or a crosslinking agent for polymers.

T-ethyl-1,5-dimethylhexylperoxy acid esters

Excellent polymers of vinyl chloride series monomers having a good thermostability to prevent coloring and not having displeasant odor can be provided with even polymerization speed at high yield by using a specific combination system of a fast initiator and retarded initiators.

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Aichi, Japan

Tomoyuki Nakamura