Star-shaped copolymers and process for their manufacture

Details Star-shaped copolymers and process for their manufacture Star-shaped copolymers and process for their manufacture

1995-02-03

1998-05-26

Zitomer, Fred

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

Synthetic resins

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

525 94, 525302, 5253333, 525361, 525364, 525366, 526173, C08F29702

Patent

active

057565856

ABSTRACT:
A process for manufacturing a star shaped block polymer of formula (PA--PB--PC).sub.n --N--(PD--PE).sub.m wherein PA, PB and PC are respectively vinylaromatic/methacrylic blocks, acrylic blocks and methacrylic blocks. PD is a polymer block selected from vinylaromatic and/or methacrylic monomer units, PE is an acrylic polymer block, n is 2 to 20 and m is 0 to 18 with the proviso that m+n is .ltoreq.20. The process proceeds by anionic polymerization in the presence of a monofunctional initiator of formula (II),

REFERENCES:
patent: 4659782 (1987-04-01), Spinelli
patent: 5395884 (1995-03-01), Gnanou

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