Copolymers of sodium styrene sulfonate and sodium-N-(4-sulfophen

Details Copolymers of sodium styrene sulfonate and sodium-N-(4-sulfophen Copolymers of sodium styrene sulfonate and sodium-N-(4-sulfophen

1983-12-12

1985-09-10

Anderson, Harold D.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526287, 526288, C08F 2240

Patent

active

045407622

ABSTRACT:
This invention relates to a water soluble alternating copolymer having a 50 mol. % portion of a sodium-N-(4-sulfophenyl)-maleimide monomer and a 50 mol. % portion of a sulfonated styrenic comonomer. The sulfonated styrenic comonomer is characterized by the formula: ##STR1## wherein Y.sup..sym. is a cation selected from the Groups IA, IIA, IB or IIB of the Periodic Table or an amine of the formula .sup..sym.NHR.sub.1 R.sub.2 where R.sub.1, R.sub.2 and R.sub.3 can be aliphatic groups of C.sub.1 to C.sub.12, wherein the alternating water soluble copolymers are useful as thermally stable deflocculating agents in water based drilling muds.

REFERENCES:
patent: 3642728 (1972-02-01), Canter
patent: 3836511 (1974-09-01), O'Farrell et al.
patent: 3847854 (1974-11-01), Canter et al.
patent: 3870841 (1975-03-01), Makowski et al.

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