Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2006-05-02
2006-05-02
Choi, Ling-Sui (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S241000, C525S232000, C525S211000, C524S492000, C524S445000, C524S451000
Reexamination Certificate
active
07037979
ABSTRACT:
Thermoplastic polyolefin compositions and a process for preparing the same are provided comprising a blend of polypropylene, and styrenic elastomer. The compositions may further comprise ethylene copolymer elastomer, polymer additive, such as polymer surface modifier, powder flow additive, stabilizer and/or color pigment. The compositions are particularly applicable for use in a slush molding process where low melt viscosity is desired to form improved surface quality thermoplastic polyolefin skin. A process is disclosed for preparing thermoplastic polyolefin into a slush moldable powder by melt compounding the composition to form pellets, and further processing the pellets by cryogenic pulverization or by extruding micropellets in one step using a gear pump to increase the melt pressure.
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JP 2000-159944 (translation in English).
European Search Report for European Patent Application No. EP03077631.
Ellis Thomas S.
Kakarala Srimannarayana
Patel Sandip R.
Choi Ling-Sui
Delphi Technologies Inc.
Lee Rip A.
McBain Scott A.
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