Thixotropic clay aqueous suspensions containing polyacrylic acid

Details Thixotropic clay aqueous suspensions containing polyacrylic acid Thixotropic clay aqueous suspensions containing polyacrylic acid

1986-10-29

1989-08-15

Lieberman, Paul

Compositions

Water-softening or purifying or scale-inhibiting agents

25217424, 2521881, 252108, C11D 1700

Patent

active

048572268

ABSTRACT:
The physical stability and rheological properties variations of liquid gel-like compositions based on montmorillonite, attapulgite, hectorite or other inorganic colloid-forming clay or other thixotropic thickener are greatly improved by incorporating in the composition small amounts, such as about 1.0 weight percent, of polyacrylic acid polymers or copolymers and their salts and small amounts, such as 0.2 or 0.4 weight percent, of calcium, magnesium, aluminum or zinc stearate or other polyvalent metal salt of long chain fatty acid. The aqueous compositions containing inorganic builder salts and other functional inorganic salts, chlorine bleach, bleach-stable detergent, thixotropic thickener, and polyacrylic acid polymers and copolymers and their salts and polyvalent metal salt of a fatty acid as physical stabilizers remain stable against rheological properties variations with time and phase separation for periods in excess of twelve weeks under a wide range of temperatures. The thixotropic properties can be retained or improved using smaller levels, such as 0.20 to 0.5%, of the clay thixotropic thickener than in the absence of the polyacrylic acid polymer or copolymer physical stabilizer. Use as liquid gel-like automatic dishwasher compositions are described.

REFERENCES:
patent: 3629122 (1971-12-01), Jacobi
patent: 4147650 (1979-04-01), Sabatelli et al.

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