Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1985-11-12
1987-06-30
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
1062871, 2523132, 524790, 524445, 524446, 524447, C08L 7504
Patent
active
046771581
ABSTRACT:
A process whereby a smectite clay having a cationic exchange capacity of at least 50 meq./100 gm of clay is reacted with a quaternary ammonium compound to yield a cationic structure suitable as a thickener for aqueous suspensions, particularly latex paints and caulks. The general structure of the quaternary ammonium compound is typically a nitrogen atom bonded to four separated carbon chains where one chain can be a methyl or alkyl group containing 10 to 22 carbons, and the second chain an alkyl group containing from 10 to 22 carbons or a polyoxyethylene chain. The third and fourth chains are polyoxyethylene chains where the total munber of ethylene oxide units is from 5 to 200 moles.
REFERENCES:
patent: 3298849 (1967-01-01), Dohman et al.
patent: 4391637 (1983-07-01), Wordis et al.
patent: 4412018 (1983-10-01), Finlayson et al.
Beall Gary W.
Holthouser Mary C.
Tso Su C.
Steutermann Edward M.
United Catalysts Inc.
Welsh Maurice J.
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