Hydrophilic copolymers based on N-[tris(hydroxymethyl)methyl]-ac

Details Hydrophilic copolymers based on N-[tris(hydroxymethyl)methyl]-ac Hydrophilic copolymers based on N-[tris(hydroxymethyl)methyl]-ac

1982-09-08

1984-06-05

Schofer, Joseph L.

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

Synthetic resins

Ion-exchange polymer or process of preparing

526240, 526258, 526259, 526287, 526288, 526286, 526304, 526285, C08F22058, B01D 1500, C08L 500, C08L 8900

Patent

active

044529163

ABSTRACT:
Tridimensional cross-linked random copolymers, insoluble in water, containing in copolymerized form: (a) 25% to 98% by weight of N-[tris(hydroxymethyl)methyl]acrylamide or N-[tris(hydroxymethyl)methyl]methacrylamide, or a mixture of these two compounds. (b) 2% to 50% by weight of one or more monomers containing two or several polymerizable ethylenic double bonds and free from anionic or cationic functional groups, and (c) 0.1% to 50% by weight of one or more monomers containing a polymerizable ethylenic double bond and one or more mono- or di-substituted amino, pyrimidinyl, guanidyl, purinyl, quaternary ammonium, SO.sub.3 H or SO.sub.3 M groups, M being an alkali metal. These copolymers are utilizable, in the form of aqueous gels, as ion exchangers.

REFERENCES:
patent: 3700635 (1972-10-01), Brust et al.
patent: 3886125 (1975-05-01), Chromecek
patent: 4192784 (1980-03-01), Brown et al.

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