Associative thickeners for aqueous systems

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...

Reexamination Certificate

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Reexamination Certificate

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07423082

ABSTRACT:
Thiocarbonate compounds which, in one embodiment, are utilized as a rheology modifier or associative thickener. The thiocarbonate compounds thicken or increase the viscosity of a composition, preferably an aqueous composition when used in an effective amount. In one preferred embodiment, the thiocarbonate compounds include at least one hydrophilic group containing repeat unit such as derived from acrylic acid, and at least one hydrophobic group to enhance association with other compounds and thus increase viscosity of a composition. Aqueous composition comprising a latex and thiocarbonate associative thickeners are described.

REFERENCES:
patent: 4079028 (1978-03-01), Emmons et al.
patent: 4180491 (1979-12-01), Kim et al.
patent: 4425485 (1984-01-01), Sone et al.
patent: 4514552 (1985-04-01), Shay et al.
patent: 6596899 (2003-07-01), Lai
patent: 2003/0120101 (2003-06-01), Lai
patent: 2003/0162896 (2003-08-01), Destarac et al.

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