Water extended hydrophilic molding compositions

Claim 1

A composition useful for the preparation of soft, tough, hydrophilic articles, comprising: (a) about 100 parts by weight of an amide-endcapped hydrophilic alkylene oxide prepolymer having the formula ##STR11## wherein x, y and z are integers of from 5 to 25; (b) from 2 to 8 parts of an acid activated cross linking agent which is a compound having the formula R.sup.9 -CH.sub.2 OR.sup.10).sub.b wherein R 9 is a polyvalent organic nitrogeneous residue selected from the group consisting of ##STR12## wherein R 11 and R 13 are polyvalent organic residues having a combining valency of c and d respectively; c and d are integers having a value of from 2 to 4; R 12 , R 14 , R 15 , and R 16 are selected from the group consisting of hydrogen and lower alkyl groups having from 1 to 6 carbon atoms, and R 14 and R 15 together may form a ring with the nitrogen atom having 4 to 7 atoms therein; R 17 is a polyvalent radical of an organic polyhydroxy alkyl compound having e hydroxyl groups but devoid of such groups, e is an integer from 1 to 6; and where e is 1, R 17 is a lower alkyl group having from 1 to 6 carbon atoms; R 10 is a lower alkyl group having from 1 to 6 atoms; and b is an integer from 2 to 6; (c) from 20 to 50 parts by weight of water; (d) from 20 to 45 parts by weight of a suitable filler; and (e) from 0.1 to 3 parts by weight of a catalyst selected from the group consisting of acids having a pK a less than 4, and latent acid generating compounds capable of generating an acid having a pK a less than 4 upon heating at a temperature of at least 50° C.