Acrylic multistage graft copolymer products and processes

Details Acrylic multistage graft copolymer products and processes Acrylic multistage graft copolymer products and processes

1979-01-12

1979-12-25

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...

525 80, C08L 3308, C08L 3310, C08L 3312

Patent

active

041805291

ABSTRACT:
A resilient, acrylic graft polymer is produced by multi-stage, sequential polymerization in which the first stage is elastomeric, the second stage is nonelastomeric, the third stage is elastomeric and the fourth, and final stage is nonelastomeric. Upon blending with a nonresilient methacrylic matrix resin, followed by molding, an impact resistant molded product is obtained which has low stress-whitening, generally does not show substantial crack propagation on impact and does not readily break on subjection to fold endurance tests.

REFERENCES:
patent: 3562235 (1971-02-01), Ryan
patent: 3787522 (1974-01-01), Dickie et al.
patent: 3793402 (1974-02-01), Owens
patent: 3804925 (1974-04-01), Kato et al.
patent: 4052525 (1977-10-01), Ide et al.
Emulsion Polymerization Theory and Practice, D. Blackley, John Wiley & Sons, 1975, p. 322.

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