Water-soluble polymer sensitive to salt

Details Water-soluble polymer sensitive to salt Water-soluble polymer sensitive to salt

1991-02-19

1994-05-31

Zitomer, Fred

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

Synthetic resins

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

5253297, 5253301, 5253303, 525360, 525366, 525367, 525369, 525374, 525378, 525379, 525380, 5263171, 5263184, 526326, 5263285, C08F22006, C08F22012, C08F 844

Patent

active

053170636

ABSTRACT:
A water-soluble polymer sensitive to salts is a copolymer of (A) 10 to 90% of acrylic acid and/or methacrylic acid; and (B) 90 to 10% of a vinyl monomer of Formula (I): ##STR1## (wherein R represents a hydrogen atom or a methyl group; and R.sup.1 represents an aryl group or a cycloalkyl group); or the foregoing component (A); (B) 2 to 70% of a vinyl monomer of Formula (II): ##STR2## (wherein R.sup.2 represents an alkyl group, an aryl group or a cycloalkyl group); and (C) 2 to 40% of a vinyl monomer of Formula (III): ##STR3## (wherein R.sup.3 represents an aryl group), 2 to 70 mole % of the repeating units derived from the acrylic acid and/or methacrylic acid being in the form of a salt. It is soluble in tap water, but insoluble in an aqueous solution containing not less than 0.5% of an inorganic salt of a monovalent ion.

REFERENCES:
Cram, D. J. & Hammond, G. S. "Organic Chemistry" 16 (1960) McGraw-Hill (New York).
Noller, C. R. "Textbook of Organic Chemistry", 2nd Ed., 575 (1958) Saunders (London).

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