Water absorbent styrene-acrylic acid copolymers

Details Water absorbent styrene-acrylic acid copolymers Water absorbent styrene-acrylic acid copolymers

1986-04-21

1987-06-30

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5263171, 252194, C08F23004

Patent

active

046771743

ABSTRACT:
Water absorbing, cross-linked acrylate resin copolymers are prepared by aqueous polymerization of (A) acrylic acid neutralized 70 to 100 mole percent for example with ammonia, and/or caustic alkali and/or an amine; with (B) styrene and/or methyl methacrylate in an amount of 1% to 25% based on the weight of acrylic acid or acrylate, and (C) acrylamide in a mole ratio of 70 to 100 mole percent (A) to 30:0 mole percent (C); and (D) a water miscible or a water soluble polyvinyl monomer in an amount of 0.001 to 0.3 weight percent based on the total weight of (A), (B), (C) and (D).

REFERENCES:
patent: 4342858 (1982-08-01), Herman et al.
patent: 4552938 (1985-11-01), Mikita et al.

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