Dicarboxylic acids and dicarboxylic acid esters containing a...

Details Dicarboxylic acids and dicarboxylic acid esters containing a... Dicarboxylic acids and dicarboxylic acid esters containing a...

Category

C - Chemistry, Metallurgy

Subcategory

07

Subsubcategory

D

CPC

260/305.3

IPC codes

C07D 233/74 (2006.01) C08G 63/685 (2006.01)

Type

Patent

Patent number

CA 1089862

Description

Abstract of the Disclosure Dicarboxylie acids and dicarboxylic acid esters of the formula Image wherein both R1 each denote hydrogen, alkyl with 1 to 4 C atoms or phenyl, both R2 each denote hydrogen or alkyl with 1 to 10 C atoms and, if the two R2 each denote hydrogen, the two n re- present numbers from 2 to 12 and, if the two R2 each denote an alkyl group with 1 to 10 C atoms, the two n represent numbers from 1 to 12, R3 denotes hydrogen, methyl or ethyl and R4 denotes methyl, ethyl, propyl or isopropyl, are prepared by reacting 1 mol of a 1,1'-methylene-bis-hydantoin of the formula Image or its disodium or dipotassium salt with 2 mols of a compound of the formula Image wherein Y1 denotes a chlorine or bromine atom. The dicarboxylic acid compounds are characterized by a high stability to heat and therefore very suitable for the manufacture of polyconden- sates by the melt condensation process. - la -

Application Number

278090

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