Polyvinyl-polyoxyalkylene block copolymers

Details Polyvinyl-polyoxyalkylene block copolymers Polyvinyl-polyoxyalkylene block copolymers

1993-12-22

1996-01-16

Lesmes, George F.

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

Synthetic resins

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

5253267, 5253269, 5253291, 5253303, 5253304, C08F 0834, C08F 1208

Patent

active

054848512

ABSTRACT:
A mixed block copolymer of the A-B type is prepared. The A block of the block copolymer is formed by the polymerization of compounds having vinyl groups and the B block of which is a polyoxyalkylene block, obtainable by polymerizing, first of all, monomers having vinyl groups at temperatures of 60.degree. to 150.degree. C. by a free radical mechanism in the presence of sufficient amounts of an initiator and an amount, which corresponds to the desired chain length, of a chain-length regulator, which carries, aside from a mercapto group, a further functional group having at least one active hydrogen and adding alkylene oxide, optionally in the presence of a known addition reaction catalyst, in an addition reaction at 20.degree. to 180.degree. C. onto the polymer so modified, until the desired molecular weight of block B is reached.

REFERENCES:
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Uyanik et al., J. Appl. Polym. Sci., 41, 1981-1983 (1990).
Nair et al., J. Macromol. Sci. Chem., A27(6), 791-806 (1990).
Riess et al. ACS Polymer Preprints 23, 19, 1982.
O'Malley et al., "Block Polymer", Ed. S. L. Aggarwal, Plenum Press, New York, 1970.
Huynh--BA--Gia et al., J. Polym. Sci. Polym. Phys. Ed. 18, 2391, 1980.

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