Process for the preparation of rubber-containing graft copolymer

Details Process for the preparation of rubber-containing graft copolymer Process for the preparation of rubber-containing graft copolymer

1992-03-27

1994-04-26

Buttner, David

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

525 71, 525 80, 525 85, 525902, C08L 5100, C08L 5104, C08L 5502

Patent

active

053067630

ABSTRACT:
Rubber-containing graft copolymer particles excellent in powder properties are prepared by a process comprising mixing, with 100 parts by weight (as solid content) of rubber-containing graft copolymer (A) in a state of slurry, 0.1 to 10 parts by weight of a rigid non-elastic multi-stage polymer (B), in a state of slurry, consisting of 30 to 80% by weight of a (co)polymer component comprising 40 to 100% by weight of methyl methacrylate and 0 to 60% by weight of one or more other monomers copolymerizable therewith being polymerized at least in the first stage and 5 to 70% by weight of a (co)polymer component comprising 70 to 100% by weight of methyl methacrylate and 0 to 30% by weight of one or more other monomers copolymerizable therewith being polymerized in the final stage, the total amount of the (co)polymer components in the respective stages being 100% by weight and the content of polymeric units derived from an acrylic ester in the multi-stage polymer (B) being from 5 to 30% by weight.

REFERENCES:
patent: 4097553 (1978-06-01), Novak
patent: 4463131 (1984-06-01), Grandzol et al.
patent: 4645795 (1987-02-01), Hosoi et al.
patent: 4699948 (1987-10-01), Kishida et al.
patent: 5221713 (1993-06-01), Keinpuer et al.

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