C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/9003, 134/3.
C08L 33/02 (2006.01) C08K 3/34 (2006.01) C08K 5/09 (2006.01) C08K 5/098 (2006.01) C11D 3/12 (2006.01) C11D 3/37 (2006.01)
Patent
CA 1307369
THIXOTROPIC CLAY AQUEOUS SUSPENSIONS CONTAINING POLYACRYLIC ACID POLYMER OR COPOLYMER STABILIZERS ABSTRACT OF THE DISCLOSURE The physical stability and rheological properties variations of liquid gel-like compositions based on montmoril- lonite, attapulgite, hectorite or other inorganic colloid- forming clay or other thixotropic thickener are greatly improv- ed by incorporating in the composition small amounts, such as about 1.0 weight percent, of polyacrylic acid polymers or co- polymers and their salts and small amounts, such as 0.2 or 0.4 weight percent, of calcium, magnesium, aluminum or zinc stear- ate 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 stabili- zer. Use as liquid gel-like automatic dishwasher compositions are described.
550065
Drapier Julien
Gallant Chantal
Van de Gaer Daniel
Colgate-Palmolive
Smart & Biggar
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