Graft copolymers and process for their preparation

Details Graft copolymers and process for their preparation Graft copolymers and process for their preparation

C - Chemistry, Metallurgy

08

G

400/1326, 117/17

C08G 65/28 (2006.01) C08G 65/04 (2006.01) C08G 65/26 (2006.01)

Patent

CA 1205233

GRAFT COPOLYMERS AND PROCESS FOR THEIR PREPARATION ABSTRACT OF THE DISCLOSURE Under particular conditions, a cationic ring-opening polymerization of an oxirane monomer selected from the group consisting of an acyclic glycidyl ether, a cyclic glycidyl ether, and haloalkyl epoxide, in the presence of a hydroxyl-containing backbone of a polymer ("HCB") and a particular catalyst, produces a polymerization having 'living polymerization' characteristics, provided the OH groups are aliphatic OH groups and not aromatic OH groups. The result is a graft copolymer the molecular weight (mol wt) of which is directly proportional to the conversion of the monomer. The HCB, which may have from 1 to about 400 pendant OH groups, and more preferably at least 7 pendant OH groups, provides grafting sites for the grafting segments. where a grafted segment contains halogen, the segment may be aminated. If the HCB is hydrophobic, the aminated block copolymer is amphiphilic.

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