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
2011-03-15
2011-03-15
Lipman, Bernard (Department: 1762)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S404000
Reexamination Certificate
active
07906595
ABSTRACT:
A hydrophilic graft polymer having the reducing amount of the residual unsaturated monocarboxylic acid, and having very excellent temporal stability is provided.The present invention relates to the hydrophilic graft polymer obtained by graft polymerization of monomer component containing unsaturated monocarboxylic acid onto polyalkylene oxide, wherein mole ratio of side chain moiety derived from the unsaturated monocarboxylic acid is more than 90% by mole relative to total side chain, and residual amount of unsaturated monocarboxylic acid is less than 200 ppm by mass relative to the total mass of said hydrophilic graft polymer.
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Supplementary European Search Report issued in Application No. 07792123.7-2109 dated Aug. 26, 2010, 4 pages.
Tsumori Takahiro
Wakao Norihiro
Lipman Bernard
Nippon Shokubai Co. , Ltd.
Occhiuti Rohlicek & Tsao LLP
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