Polymerizable composition comprising (a) phosphorus oxyacid (b) amine and (c) inorganic material

Claim 1

A polymerisable composition comprising (a) an organic medium which comprises a polymerisable olefinically unsaturated substance which bears one or more polymerisable olefinically unsaturated groups; (b) a phosphorous oxyacid having the formula: ##STR5## wherein R 1 is a hydrocarbyl group or a polyether or polyester chain; and R 2 is hydrogen or a hydrocarbyl group or a polyether or polyester chain; and (c) an organic amine having the formula: ##STR6## wherein R 3 is a hydrocarbyl group or a polyether or polyester chain, and R 4 and R 5 , which may be the same or different are hydrogen, hydrocarbyl or polyether or polyester chains, except that (i) at least one of the groups R 1 , R 2 , R 3 , R 4 and R 5 comprises a polymerisable olefinically unsaturated group (ii) at least one of the groups R 1 and R 2 and at least one of the groups R 3 , R 4 and R 5 is, or is derived from, a long chain alkyl group containing 8 to 22 carbon atoms or a polyether or polyester chain of molecular weight between 300 and 10,000; and (d) a particulate inorganic material which is dispersed in the mixture of said organic medium, said phosphorus oxyacid and said organic amine; and wherein the ratio of said phosphorus oxyacid to said organic amine is in the range from 0.5:1 to 100:1.