Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1986-06-30
1988-04-05
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524445, 524447, 524451, 524424, 524437, 528501, 526 80, C08F 200, C08K 334
Patent
active
047359870
ABSTRACT:
This invention provides a method for the manufacture of a high-expansion type absorbent polymer by first causing an absorbent polymer which is obtained by polymerization of a monomer and is possessed of an alkali salt of acrylic acid as a component of polymer to be cross-linked at the time of azeotropic dehydration thereof with a cross-linking agent possessing two or more functional groups in the presence of an inorganic salt and subsequently drying the cross-linked polymer. By the method of this invention, there can be obtained a high-expansion type absorbent material which absorbs water quickly and forms a gel not viscid but permeable to gas. This absorbent material is highly advantageously used as absorbent for sanitary materials free from leaking water and as a water-retaining agent for agricultural applications hardly causing rotton plant roots.
REFERENCES:
patent: 4056502 (1977-11-01), Gross
patent: 4460642 (1984-07-01), Errede et al.
patent: 4587308 (1986-05-01), Makita et al.
Iwamoto Takanori
Kambayashi Taiji
Kataoka Hiroyuki
Kato Chuzo
Matsumoto Shigeaki
Kulkosky Peter F.
Osaka Yuki Kagaku Kogyo Kabushiki Kaisha
Schofer Joseph L.
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