Preparation of triblock copolymers

Details Preparation of triblock copolymers Preparation of triblock copolymers

1987-04-01

1989-06-13

Seccuro, Carman J.

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

Synthetic resins

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

525242, 525271, 525314, 525901, 525941, 525256, 525258, C08F29702, C08F29704

Patent

active

048394300

ABSTRACT:
Block copolymers are prepared by providing an initial anionically polymerizable monomer portion; anionically polymerizing the initial monomer portion to provide polymer chains with living ends, and contacting the polymer chains with m-bis(phenylethenyl)benzene (PEB), a coupling agent, to bring about substantial coupling. In preferred embodiments the polymer chain living ends are capped with an .alpha.-alkylstyrene or a ring-alkyl substituted .alpha.-alkylstyrene, wherein the .alpha.-alkyl groups contain between about 1 to about 20 carbon atoms, and the ring-alkyl groups have at least 2 carbon atoms. The coupling agents employed with the capped polymer chain living ends include PEB, p-dibromoxylene, terephthaloyl chloride, 1,4-dibromobutene; and the multifunctional epoxides, multifunctional isocyanates, multifunctional aziridines, multifunctional aldehydes, multifunctional ketones, multifunctional anhydrides, multifunctional esters, and polyhalides.

REFERENCES:
patent: 3598887 (1971-08-01), Darcy et al.
patent: 3639523 (1972-02-01), Hayter et al.
patent: 3770712 (1973-11-01), Schwab
patent: 3891721 (1975-06-01), Prudence
patent: 3956426 (1976-05-01), Shepers
patent: 3959412 (1976-05-01), Oberlin
patent: 3992483 (1976-11-01), Willis
patent: 4010226 (1977-03-01), Crossland
Quirks et al.-"Rational Synthesis of Star Block Copolymers . . . "-Apr. 1986-Polymer Preprints vol. 27-No. 1, pp. 188-189.

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