Sequential coupling in formation of resinous block copolymers

Details Sequential coupling in formation of resinous block copolymers Sequential coupling in formation of resinous block copolymers

1992-05-18

1993-12-14

Schofer, Joseph L.

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

Synthetic resins

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

525313, 526 79, 526173, 526178, 526208, C08F29704

Patent

active

052703967

ABSTRACT:
A method for preparing resinous copolymers by sequential charge copolymerization of at least two charges, at least one being a conjugated diene and at least one being a monovinylarene; followed by a charge of a polyfunctional coupling agent; and the final charge being an essentially difunctional coupling agent. The copolymer made by this method and articles made from this copolymer are also provided.

REFERENCES:
patent: 3639517 (1972-02-01), Kitchen et al.
patent: 3668279 (1972-06-01), Loveless et al.
patent: 4020258 (1977-04-01), Farrar
patent: 4584346 (1986-04-01), Kitchen

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