Asahi Kasei Kogyo Kabushiki Kaisha

Naohiro Tsuruta

Hideo Ai

Yohsuke Koizumi

A linear polymer having a recurring unit represented by the formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each independently is a hydrogen atom, a C.sub.1-10 alkyl group, a C.sub.6-10 cycloalkyl group, an aryl group, or a halogen atom and the ethynyl group is in either meta position or para position to the main polymer chain; and a weight-average molecular weight of 1,000 to 1,000,000. A resin composition consisting essentially of (i) a polymer having a recurring unit represented by the formula (I) or a polymer having a recurring unit represented by the formula (I) and a recurring unit represented by the formula (II): ##STR2## wherein X and Y each independently is a C.sub.6-20 aryl group, a C.sub.1-10 alkyl group, a C.sub.6-10 cycloalkyl group, a silyl group having a C.sub.1-10 alkyl group or a C.sub.6-10 aryl group, a hydrogen atom or a halogen atom, and the ethynyl group of the unit (I) is in either meta position or para position to the main polymer chain; and the weight ratio of the unit (I) to the unit (II) ranges from 1/99 to 99.5/0.5 and (ii) at least one agent selected from the group consisting of (a) an improvement agent for casting and molding property in an amount of about 3 to about 50% by weight based on the weight of the polymer; (b) an adhesive agent in an amount of about 1 to about 15% by weight based on the weight of the polymer; and (c) a photocrosslinking initiator in an amount of about 0.1 to about 20% by weight based on the weight of the polymer.

Photocurable compositions of poly(ethynylphenyl)acetylene, its copolymer

A linear polymer having a recurring unit represented by the formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each independently is a hydrogen atom, a C.sub.1-10 alkyl group, a C.sub.6-10 cycloalkyl group, an aryl group, or a halogen atom and the ethynyl group is in either meta position or para position to the main polymer chain; and a weight-average molecular weight of 1,000 to 1,000,000.

Poly(ethynylphenyl)acetylene, its copolymer and composition thereof

A resin composition comprising (A) a polymer having, in the molecule, at least two groups represented by the following structural formula (I): ##STR1## wherein R.sub.1 is isopropyl, sec-butyl, tert-butyl, a C.sub.5-20 alkyl group, a C.sub.3-20 cycloalkyl group, a C.sub.5-20 alkenyl group, a C.sub.3-20 hydroxyalkyl group, a C.sub.5-20 alkoxyalkyl group, a C.sub.3-20 aminoalkyl group, a C.sub.6-20 aryl group or a C.sub.6-20 arylalkyl group, and n is 0, 1 or 2, and (B) a polymer having an electron attractive group and an .alpha.,.beta.-ethylenic double bond adjacent thereto. Though said composition is stable at room temperature, it is crosslinked and cured at high temperatures because the amino group of the polymer (A) adds to the double bond of the polymer (B). Accordingly, said resin composition is suitable for use as a cathodic electrocoating material.

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Fuji, Japan

Naohiro Tsuruta