US 5,395,895 AGranted

Resin composition and a molded article utilizing it

AssigneeShowa Denko K.K.

InventorsHirotaka Tagoshi, Yasuhiro Mikawa, Masahiro Ueno, Shintaro Inazawa, Katsuaki Tsutsumi, Hiroyuki Hagi, Yukio Okamoto

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Abstract

A thermally reversible crosslinked resin composition comprising a specific ethylenic copolymer, a specific polyhydric alcohol and a specific reaction promoter and a molded article produced by utilizing the resin composition are disclosed. Because the resin composition and the molded article have a high reaction rate of dissociation of the crosslinking during heating and a high reaction rate of formation of the crosslinking during cooling, they can be utilized for various applications, such as melt molding and the like, as the the thermally reversible crosslinked resin composition and the thermally reversible crosslinked molded article which are substantially valuable for commercial application.

Claims11

Dependent claims

A resin composition comprising:

(a) an ethylenic copolymer of a monomeric mixture containing ethylene and at least one radical polymerizable acid anhydride, said copolymer having a concentration of acid anhydride groups in a range from 0.1 to 20 weight %
(b) a polyhydric alcohol containing at least two hydroxyl groups in the molecule, and
(c) a reaction promoter for promoting reaction between the acid anhydride groups of the ethylenic copolymer (a) and the hydroxyl groups of the polyhydric alcohol (b), the molar ratio of units of hydroxyl groups in the polyhydric alcohol (b) to units derived from acid anhydride groups in the ethylenic copolymer (a) being in a range from 0.01 to 10 and the amount of the reaction promoter (c) being in a range from 0.001 to 20 weight parts based on 100 weight parts of the ethylenic copolymer (a).

Dependencies are inferred from the claim text.