Hodogaya Chemical Co., Ltd.

Mochida Seiyaku Kabushiki Kaisha

Susumu Jinbo

Shoichi Kohno

Shigeru Shimada

Koichi Kashima

Masatoshi Onishi

Hideyuki Isii

A cure-accelerator for an epoxy resin, which comprises a compound of the formula (I),

Cure-accelerator for epoxy resin

Disclosed is a polyoxyalkylene derivative which is useful for a carboxyl group-containing polyurethane resin, can easily introduce a carboxyl group into a polyurethane resin skeleton, and has a low melting point or is in a liquid state at normal temperature. The polyoxyalkylene derivative is represented by formula (I): ##STR1## wherein R.sub.1 represents a hydrogen atom or an alkyl group having from 1 to 3 carbon atoms; R.sub.2 represents an alkylene group having from 1 to 6 carbon atoms or an arylene group having from 6 to 8 carbon atoms; A represents an alkylene group having from 4 to 7 carbon atoms; B represents an alkylene group having from 2 to 6 carbon atoms; l represents from 0 to 2; m represents from 0.1 to 35; n represents from 0.1 to 50; and 0.5&lt;(m+n)&lt;50.

Carboxyl group-containing polyoxyalkylene derivative

4-oximino-1,2,3,4-tetrahydroquinoline derivatives of the formula (I): ##STR1## wherein X represents a halogen atom and Y represents a hydrogen atom, a straight-chain or branched-chain alkyl group, a halogen-substituted lower alkyl group, a phenylalkyl group, a phenylalkenyl group, an unsubstituted or halogen-substituted phenyl group, a nitrogen-containing aromatic group, a straight-chain or branched-chain alkoxy group or an alkyl-substituted or phenyl-substituted amino group.

4-Oximino-1,2,3,4-tetrahydroquinoline derivatives

4,4'-Dihydroxybiphenyl is produced by hydrolyzing 4,4'-dibromobiphenyl in the presence of a copper compound catalyst in an alkaline aqueous solution; extracting by-products from the alkaline aqueous solution with an alcohol or ketone which forms an organic phase; neutralizing or acidifying the alkaline aqueous solution with an acid; extracting the reaction product with the specific solvent; and crystallizing the reaction product from the extracted solution to obtain 4,4'-dihydroxybiphenyl having high purity.

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Yokohama, Japan

Susumu Jinbo