High gloss acrylate rubber-modified weatherable resins

Details High gloss acrylate rubber-modified weatherable resins High gloss acrylate rubber-modified weatherable resins

1987-02-18

1988-06-28

Ziegler, Jacob

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

Synthetic resins

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

525 71, 525 74, 525 75, 525 81, 525 85, 525193, 525228, C08L 3904, C08L 5104

Patent

active

047539887

ABSTRACT:
Impact modified copolymers of vinyl aromatic, ethylenically unsaturated nitrile and, optionally, methyl methacrylate monomer, wherein the impact modifier comprises (a) large grafted rubber particles of a rubbery alkyl acrylate polymer having a particle size from about 0.5.mu. to 0.8.mu., 0.04 to 0.5 percent by weight of a polymerized crosslinking monomer and from 0.5 to 40 percent grafted rigid phase, and (b) small grafted rubber particles of a rubbery alkyl acrylate polymer having a particle size from about 0.05.mu. to about 0.20.mu., 0.25 to about 2.0 percent of a crosslinking monomer, provided that the weight percentage of crosslinking monomer is at least twice the weight percentage of the crosslinking monomer in the large particle, and from about 15 to about 60 percent by weight grafted rigid phase.

REFERENCES:
patent: 3691260 (1972-09-01), Mittnacht et al.

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