Patent GB-965318-A (GB)
Title: Polymeric composition stabilized against ultra-violet light
IPC: C08K5/10
Filed: 1962-06-12
Abstract: In the examples: (1) the n-octyl ester of 21-carboxy-2-hydroxy-4-methoxybenzophenone is made by reacting 1-octanol with 21-carboxy-2-hydroxy-4-methoxybenzophenone in the presence of ethylene dichloride and sulphuric acid and (2) the ethyl ester of 21-carboxy-2-hydroxy-4-methoxybenzophenone is made by reacting ethanol with 21-carboxy-2-hydroxy-4-methoxybenzophenone in the presence of sulphuric acid.ALSO:A modification of the composition according to the parent Specification comprises a polymeric organic material admixed with from 0.05 to 10% by weight of a compound of the structure <FORM:0965318/C3/1> where X is an o-hydroxyphenyl radical and Y is an o-carbalkoxyphenyl radical, any other substituents in X and Y being alkyl, alkoxy, halogen or hydroxyl. Specified ultra violet light absorbers are the ethyl, butyl, octyl and dodecyl esters of 21-carboxy -2- hydroxy -4- methoxy-benzophenone, the methyl and hexyl esters of 21-carboxy -2- hydroxy -5- methyl-benzophenone, the propyl ester of 21-carboxy -2- hydroxy -5- butyl-benzophenone, the ethyl ester of 21-carboxy-2:4-dihydroxy-benzophenone, the methyl ester of 21-carboxy -2- hydroxy -5- chlorobenzophenone and the ethyl ester of 2-carboxy -2- hydroxy -4- octyloxy-benzophenone.  The polymers used are those specified in the parent Specification. In the examples:  (3) polystyrene is milled with the octyl ester of 21-carboxy -2-hydroxy -4- methoxy-benzophenone; (4) low density polyethylene is milled with the octyl ester of 21-carboxy -2- hydroxy -4- methoxybenzophenone; (5) polystyrene is milled with (a) the methyl and (b) the ethyl ester of 21-carboxy -2- hydroxy -4- methoxy benzophenone and (6) a styrene modified polyester is mixed with styrene, benzoyl peroxide and (a) the ethyl ester of 21-carboxy -2- hydroxy -4- methoxy benzophenone, (b) the methyl ester of 21-carboxy -2- hydroxy -4- methoxy benzophenone, (c) 21-carboxy -2- hydroxy -4- methoxy-benzophenone octyl ester and (d) 21-carbethoxy -2- hydroxy -4- methoxy benzophenone and the mixtures cured by heating.ALSO:A modification of the process of the parent Specification for treating fibres containing recurring trivalent nitrogen atoms in the molecular chain of said fibres with compounds of the structure <FORM:0965318/D1-D2/1> , where X is an o-hydroxyphenyl radical and Y is an o-carboalkoxyphenyl radical, any other substituents in X and Y being chosen from alkyl, alkoxy, halogen or hydroxyl, comprises agitating the said fibre in an aqueous dispersion of said compound at a pH below 7 while heating the dispersion above 150 DEG F. Specified ultra-violet light absorbers are the ethyl, butyl, octyl and dodecyl esters of 21-carboxy-2-hydroxy-4-methoxybenzophenone, the methyl and hexyl esters of 21-carboxy-2-hydroxy-5-methyl-benzophenone, the propyl ester of 2-carboxy-2-hydroxy-5-butylbenzophenone, the ethyl ester of 21-carboxy-2:4-dihydroxy-benzophenone, the methyl ester of 21-carboxy-2-hydroxy-5-chloro-benzophenone and the ethyl ester of 21-carboxy-2-hydroxy-4-octyl oxy-benzophenone.  Specified fibres are those disclosed in the parent Specification.