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
2011-01-18
2011-01-18
Sastri, Satya B (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...
C523S111000
Reexamination Certificate
active
07872076
ABSTRACT:
An object of the present invention is to provide a particulate water-absorbent resin composition and its production process, wherein the particulate water-absorbent resin composition is an enhanced one in both of the “liquid permeability” and “liquid-sucking-up property” (which have hitherto been antithetical physical properties) of the water-absorbent resin. As a means of achieving this object, a first particulate water-absorbent resin composition according to the present invention is a particulate water-absorbent resin composition comprising a water-absorbent resin (A) of a crosslinked structure obtained by polymerizing an acid-group-containing unsaturated monomer, with the composition being characterized by: having a particle size such that particles in the range of 850 to 150 μm (but not including 850 μm) account for not less than 90 weight % of the entirety; and containing a tetra- or more functional polyol (B) at least on surfaces.
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Ikeuchi Hiroyuki
Iwamura Taku
Machida Sayaka
Okochi Hiroko
Torii Kazushi
Nippon Shokubai Co. , Ltd.
Roylance Abrams Berdo & Goodman L.L.P.
Sastri Satya B
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