Imperial Chemical Industries Limited

John Langshaw Brooks

Richard Budziarek

James William Crook

Edward Jervis Vickers

David J Harper

David Crawford Eaton

Barry Williams

Carbamates

A process for the cross-linking or chain extension of hycrocarbon polymers which contain ethylenically unsaturated groups which comprises forming an intimate mixture of the polymer with a carbamate of the formula: ##STR1## WHEREIN R.sub.1 is an optionally substituted hydrocarbyl radical, m is an integer, and A is H or an optionally substituted hydrocarbyl radical of valency m, and subjecting the mixture to heat. Novel compounds of preferred use include those in which m=1 and at least one of R and A is alkyl or 7 or more carbon atoms, or in which m=2 and A is phenylene or alkylene or alkenylene of 2 to 4 carbon atoms.

Process of crosslinking unsaturated hydrocarbon polymers employing novel

A process for the cross-linking or chain-extension of hydrocarbon polymers which contain ethylenically unsaturated groups which comprises forming an intimate mixture of the polymer with a mono-sulphonyloxycarbamate of the formula:

Cross-linking hydrocarbon unsaturated polymer with

Poly-carbonyloxyurethanes

Poly-sulphonyloxyurethanes of the formula

Nitrogen-containing compounds

The compound of the formula ##STR1## is exceptionally useful as an agent for increasing the bond strength between rubber and copper or its alloys.

2-Amino-4-chloro-6-(2'-hydroxy-phenoxy)-s-triazine

Compounds of the formula ##STR1## WHEREIN A is a linking group, X is an O--CO-- or --SO.sub.2 -- group and n is at least 2, are prepared from the corresponding N',N'-disubstituted hydrazides by quaternization and treatment with alkali or reaction with an alkylene epoxide or from the corresponding compound wherein n = 1 and A is a polymerizable group by polymerization. The compounds are unstable to heat and may be used as cross-linking agents for polymers or as chain-extending agents, bonding agents or adhesives.

Oxyformamidates

Compounds of the formula A--X--N.sup.+--N.sup.-  .sub.n, wherein A is a linking group, X is an O--CO-- or --SO.sub.2 -- group and n is at least 2, are prepared from the corresponding N',N'-disubstituted hydrazides by quaternisation and treatment with alkali or reaction with an alkylene epoxide or from the corresponding compound wherein n = 1 and A is a polymerisable group by polymerisation. The compounds are unstable to heat and may be used as cross-linking agents for polymers or as chain-extending agents, bonding agents or adhesives.

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Manchester, United Kingdom

John Langshaw Brooks