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
2005-03-28
2010-10-26
Wu, David (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...
C525S071000, C525S085000, C525S089000, C525S094000, C525S227000, C525S309000
Reexamination Certificate
active
07820762
ABSTRACT:
Disclosed is a resin composition having excellent impact resistance and resistance to whitening by impact without deteriorating excellent transparency of a methacrylic resin. Specifically, an impact resistance modifier composed of a multilayered polymer having at least three layers, namely an innermost-layer polymer derived from an alkyl methacrylate, an intermediate-layer polymer derived from an alkyl acrylate and an outer-layer polymer having its Tg within the range of 20 to 80° C., wherein mass average particle diameter of the intermediate-layer polymer is 200 to 300 nm and the mass ratio of each layer is within an appropriate range, is blended with a methacrylic resin.
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Hatakeyama Hiroki
Nagasaka Toshio
Yanai Toshimi
Jones, Jr. Robert
Mitsubishi Rayon Co. Ltd.
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Wu David
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