Patent ID: 7491779

Claim:
A polymer obtained by a polymerization process, which polymerisation process comprises polymerising a polymerisation mixture, wherein said polymerisation mixture comprises one or more monomers of formula (I) wherein R 1 is a hydrocarbyl group; R 2 is hydrogen or a hydrocarbyl group; and R 3 is hydrogen or a hydrocarbyl group; wherein at least one monomer of formula (I) is selected from 1,4-butanediol vinyl ether, and any derivatives thereof containing alkyl, aryl, arylalkyl, substituted alkyl, substituted aryl, or substituted arylalkyl groups, these groups being substituted with alkyl, hydroxyl, mercapto, amino, halogen, carboxyl, or carbonyl, and where these groups are optionally protected for the purpose of the polymerization reaction.