Nof Corporation

Nippon Oil Fats Co., Ltd.

Yasumasa Watanabe

Hideyo Ishigaki

Shuji Suyama

Tomoyuki Nakamura

Hiroshi Okada

Tomomi Satou

Hiromi Kumura

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

The novel polyfunctional peroxides are compounds represented by the following general formula (1):

Polyfunctional peroxides, vinyl monomer polymerization initiators

An ester type polymeric peroxide; has a peroxide group of the formula (I): ##STR1## a group of the formula (I') ##STR2## a group of the formula (II) ##STR3## wherein X stands for one member selected from the group consisting of --CH.sub.2 --CH.sub.2 --, --C.tbd.C-- and ##STR4## continuously bound such that I and I' occur randomly in alternation with II, having a (I):(I') molar ratio in the range of from 9:1 to 1:9 and the [(I)+(I')]:(II) molar ratio in the range of from 6:4 to 4:6, and having an average molecular weight in the range of from 1,000 to 20,000, a polymerization initiator for vinyl type monomer comprising said ester type polymeric peroxide and method for the production of a block copolymer of vinyl type monomer by said polymerization initiator.

Polymeric peroxide, polymerization initiator and method for production

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Aichi, Japan

Yasumasa Watanabe