Graft copolymers and process for their preparation

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

1982-11-12

1985-09-10

Lieberman, Allan M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525100, 525286, 525349, 525375, 525385, 525407, 525409, 525523, 525930, 527300, 527312, C08F25102, C08E26112, C08G 5900

Patent

active

045407428

ABSTRACT:
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 a 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.

REFERENCES:
patent: 3864288 (1975-02-01), Riew et al.
patent: 4251404 (1981-02-01), Simms
patent: 4256910 (1981-03-01), Hsu
patent: 4451618 (1984-05-01), Okamoto

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