The present invention relates to a novel process for preparing high-reactivity isobutene homo- or copolymers with a content of terminal vinylidene double bonds per polyisobutene chain end of at least 70 mol %. The present invention further relates to novel isobutene polymers.

This invention relates to a polymer composition which is particularly suitable for use in the manufacture of films having a great ability to disintegrate, preferably at low temperatures, which can be used in the mulch film sector.

This invention relates to a polymer composition which is particularly suitable for use in the manufacture of films having a great ability to disintegrate, preferably at low temperatures, which can be used in the mulch film sector.

Described are polymerizable materials (e.g., compounds, prepolymers, and compositions thereof) useful in curable compositions such as anaerobically curable compositions, the compositions including adhesives, sealants, paints, coatings, and the like, as well as methods of making the polymerizable materials and using the polymerizable materials and curable compositions.

A copolymer useful as an ingredient of a colored resin composition, comprising a structural unit derived from an aromatic carboxylic acid having an ethylenically unsaturated bond, a structural unit (Ab) represented by formula (Z), and a structural unit (Ac) derived from an unsaturated compound having a cyclic ether structure having 2 to 4 carbon atoms, wherein L represents a single bond or a divalent linking group, A represents a phenyl group optionally having a substituent other than a carboxy group or a naphthyl group optionally having a substituent other than a carboxy group, R.sup.a represents a hydrogen atom, or an alkyl group having 1 to 4 carbon atoms, and a hydrogen atom contained in the alkyl group is optionally replaced by a hydroxy group.

##STR00001##

A copolymer useful as an ingredient of a colored resin composition, comprising a structural unit derived from an aromatic carboxylic acid having an ethylenically unsaturated bond, a structural unit (Ab) represented by formula (Z), and a structural unit (Ac) derived from an unsaturated compound having a cyclic ether structure having 2 to 4 carbon atoms, wherein L represents a single bond or a divalent linking group, A represents a phenyl group optionally having a substituent other than a carboxy group or a naphthyl group optionally having a substituent other than a carboxy group, R.sup.a represents a hydrogen atom, or an alkyl group having 1 to 4 carbon atoms, and a hydrogen atom contained in the alkyl group is optionally replaced by a hydroxy group.

##STR00001##

The present invention aims to provide a resin composition which can form a cured product having a high adhesive property and a high thermal conductivity. A resin composition containing an epoxy compound (A), an amine curing agent (B) and a thermally conductive filler (C), wherein the epoxy compound (A) is in a liquid form and wherein the amine curing agent (B) contains a benzoxazole skeleton.

The present invention aims to provide a resin composition which can form a cured product having a high adhesive property and a high thermal conductivity. A resin composition containing an epoxy compound (A), an amine curing agent (B) and a thermally conductive filler (C), wherein the epoxy compound (A) is in a liquid form and wherein the amine curing agent (B) contains a benzoxazole skeleton.

Methods for improving the dispersion of optical brighteners in polymeric compositions are provided. Polymeric compositions obtained by these methods are also provided. Premixes for use in the methods are also provided. In particular, methods for incorporating an optical brightener in a polymeric composition comprising dissolving the optical brightener in a solvent prior to adding the optical brightener to the polymeric compositions are provided.

Methods for improving the dispersion of optical brighteners in polymeric compositions are provided. Polymeric compositions obtained by these methods are also provided. Premixes for use in the methods are also provided. In particular, methods for incorporating an optical brightener in a polymeric composition comprising dissolving the optical brightener in a solvent prior to adding the optical brightener to the polymeric compositions are provided.