Crosslinked polymeric composition
A crosslinked polymeric composition of hydrolyzed poly(2-alkyl-2-oxazoline) is particularly useful for making high print quality color ink-jet films which are substantially water resistant.
1 . A crosslinked polymeric composition of hydrolyzed poly(2-alkyl-2-oxazoline).
2 . A composition according to claim 1 wherein poly(2-alkyl-2-oxazoline) is partially hydrolyzed in an amount of about 1-75%.
3 . A composition according to claim 2 wherein said amount is about 5-40%.
4 . A composition according to claim 1 which is about 1-50% crosslinked.
5 . A composition according to claim 1 which is a crosslinked hydrolyzed product of poly(2-ethyl-2-oxazoline).
6 . A composition according to claim 1 which is a crosslinked random copolymer composed of the hydrolyzed unit of ethyleneimine and an unhydrolyzed unit of N-propronyl ethyleneimine.
7 . A composition of claim 1 wherein the crosslinking agent is a polyaziridine, a polyepoxide, a melamine/formaldehyde, a polycarboxylic acid, ammonium zirconium carbonate, or a polyaldehyde.
8 . A composition according to claim 1 in admixture with a film-forming polymer.
9 . A composition of claim 7 wherein said film-forming polymer is polyvinyl alcohol, polyvinyl pyrrolidone, gelatin, polyurethane, latex or cellulose.
10 . A color printable substrate according to claim 1 having the composition of claim 1 coated thereon.
11 . A method of making the composition of claim 1 which comprises hydrolyzing poly(2-alkyl-2-oxazoline) and crosslinking the hydrolyzed product.
12 . A method according to claim 11 wherein the hydrolyzing step is carried out in acid or base.
13 . A method according to claim 12 wherein crosslinking is effected by coating the hydrolyzed product onto a substrate and optionally heating.
14 . A composition of claim 1 which is in the form of an aqueous solution or hydrogel.
15 . A composition of claim 1 which is substantially free of propionic acid.