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
1993-09-14
1995-08-22
Buttner, David
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...
524297, 525129, C08K 510, C08L 2706, C08L 7508
Patent
active
054441285
ABSTRACT:
A water-sealing sheet comprising a water-swelling resin obtained by kneading together 10 to 97% by weight of a non-water-swelling thermoplastic resin, preferably vinyl chloride resin, containing 80 to 200 parts by weight of a plasticizer based on 100 parts by weight of the non-waterswelling thermoplastic resin, and 3 to 90% by weight of a water-swelling urethane resin. The urethane resin is a prepolymer having isocyanate groups in which the content of terminal NCO groups amounts to 1 to 12%, preferably 2 to 7%, obtained by the reaction of polyisocyanate with at least one polyether polyol of the formula
REFERENCES:
patent: 5075373 (1991-12-01), Takemori
Hara Kouzi
Ichizuka Isamu
Kobe Shinji
Ohkubo Ken
Okouchi Yoshitaka
Asahi Denka Kogyo Kabushiki Kaisha
Buttner David
Riken Vinyl Industry Co., Ltd.
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