Rubbery core/shell polymer with improved heat and UV resistance

Details Rubbery core/shell polymer with improved heat and UV resistance Rubbery core/shell polymer with improved heat and UV resistance

2011-07-05

2011-07-05

Eashoo, Mark (Department: 1767)

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...

C525S243000, C525S261000, C525S262000, C525S304000, C525S305000, C525S309000, C525S380000, C525S050000, C526S066000, C526S088000, C526S225000, C524S461000, C524S504000, C524S515000, C524S517000, C524S527000

Reexamination Certificate

active

07973104

ABSTRACT:
The present invention relates to rubbery core/shell polymers that have improved heat and ultraviolet light resistance. These polymers can be blended with thermoplastics to make leathery compositions. The core/shell polymers of this invention have an inner core and an outer shell. The inner core is has repeat units which are derived from (a) butyl acrylate, (b) a member selected from the group consisting of methyl methacrylate, ethyl methacrylate, methyl acrylate, and ethyl acrylate, (c) optionally, an alkoxy ethyl acrylate or an alkoxy ethyl methacrylate, (d) acrylonitrile, (f) a cross-linking agent, and (g) a monomer containing reactive cure sites The outer core has repeat units which are derived from (d) acrylonitrile, (e) styrene, and (f) additional cross-linking agent. The outer core of these polymers is void of repeat units that are derived from methyl methacrylate.

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