Diene/acrylate base impact modifier for pvc

Details Diene/acrylate base impact modifier for pvc Diene/acrylate base impact modifier for pvc

C - Chemistry, Metallurgy

08

F

400/2030

C08F 279/02 (2006.01) C08F 285/00 (2006.01) C08L 27/06 (2006.01) C08L 51/00 (2006.01)

Patent

CA 1188442

Abstract of the Disclosure Impact modifiers having high efficiency at low levels and at low temperatures comprising at least three stages, Stage A being a non-crosslinked polymer of at least 50% butadiene and at least 10% lower alkyl (C2-C8) acrylate, Stage B being a polymer of at least 80% styrene, and Stage C containing at least 50% methyl methacrylate and at least 1% alkyl (C1-C4) acrylate, the ratio of Stages A:B:C, excluding optional additional stages, being about 50-85:25-5-30-10, the ratio of stages C:B being at least 1, and Stage A being non agglomerated are disclosed, Also disclosed are methods of preparing the impact modifier and thermoplastic polymer compositions containing the impact modifier.

417186

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