Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1995-05-16
1996-08-20
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526312, 5263171, C08F 3004
Patent
active
055480470
ABSTRACT:
A process for producing a highly water absorptive polymer comprising the steps of subjecting a water-soluble ethylenically unsaturated monomer comprising as the main component acrylic acid and/or an alkali metal or ammonium salt thereof, and optionally containing a crosslinking agent to a water-in-oil type of reverse-phase polymerization in the presence of water, a water-soluble radical polymerization initiator, a dispersant and a hydrophobic hydrocarbon solvent to form a slurry of water-containing particles of a highly water absorptive polymer in the solvent, adding a polymerizable monomer to the slurry, and polymerizing the polymerizable monomer to obtain agglomerates of the particles of the highly water absorptive polymer.
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Ito Kiichi
Nakamura Toshiko
Oomori Miho
Yada Shuhei
Mitsubishi Chemical Corporation
Sarofim N.
Schofer Joseph L.
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