Copolymers of ampholytic ion pairs containing vinylic tertiary a

Details Copolymers of ampholytic ion pairs containing vinylic tertiary a Copolymers of ampholytic ion pairs containing vinylic tertiary a

1994-01-27

1996-01-16

Henderson, Christopher

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

5253284, C08F 812

Patent

active

054848652

ABSTRACT:
A composition of a superabsorbent polymer and a process for using the polymer to absorb an aqueous electrlyte solution are disclosed. The composition comprises repeating units derived from: (a) an ampholytic ion pair prepared from a polymerizable vinylic tertiary amine-containing monomer and an acid having an ethylenic moiety; (b) at least one comonomer selected from the group consisting of acrylamide, methacrylamide, acrylonitrile, acrylic acid, ethacrylic acid, alkali salts of acrylic acid, alkali salts of methacrylic acid, 2-methacryloyloxyethyltrimethylamine, 2-acrylamido-2-methylpropane sulfonic acid, alkali salts of 2-acrylamido-2-methylpropane sulfonic acid, 2-methacryloyloxyethane sulfonic acid, alkali salts of 2-methacrylamidopropyldimethylamine, styrene sulfonic acid, alkali salts of styrene sulfonic acid, and N-vinyl-2-pyrrolidone; and optionally, (c) at least one crosslinking agent which has at least two polymerizable olefinic functionalities wherein the olefinic functionalities are suitable for crosslinking.

REFERENCES:
patent: 4454114 (1984-06-01), Strasilla et al.
patent: 4460570 (1984-07-01), Strasilla
patent: 5075399 (1991-12-01), Ahmed et al.
patent: 5098970 (1992-03-01), Hsieh et al.
patent: 5106929 (1992-04-01), Ahmed et al.
Encyclopedia of Polymer Science and Engineering, vol. 11, pp. 514-530 (1988).

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