Patent GB-981539-A (GB)
Title: Manufacture of light stable high molecular polyesters and/or polyamides
IPC: C08G63/688
Filed: 1962-06-15
Abstract: A process for the production of high molecular weight polyesters and polyamides comprises reacting a 2-(21-hydroxyphenyl)benztriazole of the general formula <FORM:0981539/C3/1> where X is a divalent organic bridging member which does not impart colour, Y is a condensable carboxyl group or an aliphatically or cycloaliphatically bound amino or hydroxy group, said amino or hydroxy groups not being bound to an unsaturated carbon atom, or an ester or amide-forming derivative thereof, n is 1 or 2, the nucleus A can contain in the 4-, 5- and 6-positions the grouping -(X-Y) and/or alkyl, alkoxy, carboxy, carboxylic ester or amide, sulphonic acid amide, alkyl sulphonyl or halogens and the nucleus B can contain in the 31-, 41- and 51-positions the grouping -(X-Y) and/or hydrocarbon groups, alkoxy groups or halogens, with polycondensable monomers at temperatures of 150 DEG  to 350 DEG  C., and, when a carboxylic acid derivative of the benztriazole compound is used in the form of its acid halide at temperatures of 0 DEG  to 200 DEG  C., benztriazole compounds which contain only reactive hydroxy groups or groups reacting as such only being used for the production of polyesters. The polycondensable monomers are defined as being:-(a) for the production of polyamides: substantially equimolar mixtures of dicarboxylic acid and diamines (or salts thereof) and/or aminocarboxylic acids, and (b) for the production of polyesters: mixtures of dicarboxylic acids (or esters thereof with monohydric alcohols) and dihydric alcohols.  The examples describe the preparation of polymers from:-(1) 2 - (21 - hydroxy - 51 - b  - carboxyethylphenyl) benztriazole and e -caprolactam; (2) and (3) maleic acid anhydride, phthalic acid anhydride, diethylene glycol, ethylene glycol and 2 - (21 - hydroxy - 51 - b  - carboxyethylphenyl) -benztriazole-51-sulphonic acid amide; (4) 1: 1-cyclohexane dicarbinol, dimethyl terephthalate and the methyl ester of 2 - (21 - hydroxy - 51 - b -carboxyethylphenyl)benztriazole - 5 - carboxylic acid; (5) p:p1 - dicarbo - b  - hydroxylethyl diphenyl sulphone, adipic acid and 2-(21 -hydroxy-51 - carboxyethylphenyl)benztriazole - 5 -carboxylic acid-b -hydroxyethylamide; (6) ethylene glycol, dimethyl terephthalate and 2-(21 -hydroxy - 31 - o - carboxyphenylmethyl - 51 -methylphenyl) - benztriazole; (7) hexamethylene -diammonium adipate and 2-(21-hydroxy -31 - methyl - 5 - b  - carboxyethylphenyl) benztriazole - 5 - carboxylate; (8) hexamethylene diammonium sebacate, hexamethylene diammonium adipate, hexamethylene diamine and 2 - (21 - hydroxy - 51 - b  - carboxyethylphenyl)-benztriazole - 5 - carboxylic acid and (9) sebacic acid dichloride, hexamethylene diamine and 2 - (21 - hydroxy - 51 - b  - carboxyethylphenyl) -benztriazole - 5 - carboxylic acid. Many other suitable benztriazoles being listed in the examples.  The products of Examples (2) and (3) are copolymerized in the presence of benzoyl peroxide with:-(2) styrene and (3) methyl methacrylate. Reference has been directed by the Comptroller to Specification 878,362.