C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/4914
C08L 33/20 (2006.01) C08F 285/00 (2006.01) C08L 35/00 (2006.01)
Patent
CA 1057444
ACRYLATE-STRYRENE ACRYLONITRILE COMPOSITION AND METHOD OF MAKING THE SAME Abstract of the Disclosure An impact-resistant and weatherable thermoplastic composition comprising from about 10 to about 50 weight percent of a crosslinked acrylate elastomer having a Tg of less than 25°C., from about 5 to about 35 weight percent of a crosslinked styrene-acrylonitrile copolymer and from about 15 to about 85 weight percent of a non-crosslinked or liuear styrene-acryloni- trile copolymer. The composition is made by a three-step se- quence comprising emulsion polymerizing of an alkyl acrylate containing at least one crosslinking monomer, emulsion poly- merizing a monomer mixture of styrene, acrylonitrile and at least one crosslinking monomer in the presence of the cross- linked acrylate elastomer formed in the previous step, or a reverse sequence of the prior two emulsion polymerization procedures, and, finally, emulsion or suspension polymerizing of styrene, acrylonitrile in the presence of the previously formed product. The product can be utilized in enviroments wherein well-known ABS plastics are used.
217356
Gallagher Ruth E.
Yu Arthur J.
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