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
2004-12-14
2009-02-10
Lipman, Bernard (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S309000, C526S088000, C526S329400
Reexamination Certificate
active
07488780
ABSTRACT:
The present invention relates to a process for preparing a vinyl chloride copolymer resin by copolymerizing a vinyl chloride type monomer and a macromonomer having a polymer comprising an ethylenically unsaturated monomer containing a double bond in a main chain, which generates only a few scales and shows excellent polymerization stability. The present invention is achieved by the process for preparing a vinyl chloride copolymer resin by copolymerizing a vinyl chloride type monomer and a macromonomer having a polymer comprising an ethylenically unsaturated monomer containing a double bond in a main chain, wherein the vinyl chloride type monomer and the macromonomer having a polymer comprising an ethylenically unsaturated monomer containing a double bond in a main chain are dispersed and mixed at a temperature from 20° C. to 60° C. for at least 1 minute, and then copolymerization reaction thereof is initiated.
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International Search Report mailed Mar. 29, 2005 of International Application PCT/JP2004/018989.
Translation of the International Preliminary Report on Patentability of International Application No. PCT/JP 2004/018989, with Form PCT/IB/373 and Form PCT/ISA/237.
Higashiyama Yukio
Kawauchi Toshihito
Kuwahata Mitsuyoshi
Noguchi Kisaburo
Hamre Schumann Mueller & Larson P.C.
Kaneka Corporation
Lipman Bernard
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