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
1991-07-10
1992-07-21
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...
524812, 524813, 524829, C08F22060
Patent
active
051323583
ABSTRACT:
A polymer emulsion capable of becoming water swellable is provided by mixing a monomer represented by the general formula ##STR1## (wherein R.sub.1 indicates H or CH.sub.3, R.sub.2 and R.sub.3 indicate an alkyl radical represented by CnH.sub.2N+1 in which n is a positive integer, A indicates --O--CH.sub.2 -- or --NH--CH.sub.2 --CH.sub.2 --, and R.sub.1, R.sub.2 and R.sub.3 are selected within the range wherein the monomer exhibits sparing solubility or insolubility in water)
with a crosslinking agent and optionally with another vinyl monomer capable of copolymerization therewith, and emulsion polymerizing the so-obtained mixture in water. The so obtained a polymer can be made water swellable by reaction with an acid, a salt or a quaternizing agent.
REFERENCES:
patent: 3943114 (1976-03-01), Hoke
patent: 4039501 (1977-08-01), Bablock et al.
Arai Takeo
Fujiyoshi Hitoshi
Shirota Masako
Watanabe Naotaka
Mitsui-Cyanamid Ltd.
Schofer Joseph L.
Smith Jeffrey T.
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