Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2001-01-26
2001-07-10
Del Cotto, Gregory (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S228000, C510S230000, C510S233000, C510S380000, C510S477000, C510S488000, C510S512000
Reexamination Certificate
active
06258764
ABSTRACT:
FILED OF INVENTION
The present invention relates generally to an automatic dishwasher detergent composition in the form of an aqueous linear viscoelastic liquid, wherein the composition is pink in color.
BACKROUND OF THE INVENTION
Liquid automatic dishwasher detergent compositions, both aqueous and nonaqueous, have recently received much attention, and the aqueous products have achieved commercial popularity.
The acceptance and popularity of the liquid formulations as compared to the more conventional powder products stems from the convenience and performance of the liquid products. However, even the best of the currently available liquid formulations still suffer from two major problems, product phase instability and bottle residue, and to some extent cup leakage from the dispenser cup of the automatic dishwashing machine as well as unacceptable color appearance.
Representative of the relevant patent art in this area, mention is made of Rek, U.S. Pat. No. 4,556,504; Bush, et al., U.S. Pat. No. 4,226,736; Ulrich, U.S. Pat. No. 4,431,559; Sabatelli, U.S. Pat. No. 4,147,650; Paucot, U.S. Pat. No. 25 4,079,015; Leikhem, U.S. Pat. No. 4,116,849; Milora, U.S. Pat. No. 4,521,332; Jones, U.S. Pat. No. 4,597,889; Heile, U.S. Pat. No. 4,512,908; Laitem, U.S. Pat. No. 4,753,748; Sabatelli, U.S. Pat. No. 3,579,455; Hynam, U.S. Pat. No. 3,684,722: other patents relating to thickened detergent compositions include U.S. Pat. No. 3,985,668; U.K. Patent Applications GB 2,116,199A and GB 240,450A; U.S. Pat. No. 4,511,487; U.S. Pat. No. 4,752,409 (Drapier, et al.); U.S. Pat. No. 4,801,395 (Drapier, et al.); U.S. Pat. No. 4,801,395 (Drapier, et al.).
All of the prior art examples are yellow in yellow. The instant compositions are bleach stable and pink in appearance.
SUMMARY OF THE INVENTION
According to the present invention there is provided a novel aqueous liquid automatic dishwasher detergent composition which is pink in color and bleach stable. The composition is characterized by its substantially indefinite stability against phase separation or settling of dissolved or suspended particles, low levels of bottle residue, relatively high bulk density, a pink colored composition which is stable in the presence of bleach and substantial absence of unbound or free water. This unique combination of properties is achieved by virtue of the incorporation into the aqueous mixture of dishwashing detergent surfactant, alkali metal detergent builder salt(s), chlorine bleach compound, an effective amount of high molecular weight cross-linked polyacrylic acid type thickening agent; a physical stabilizing amount of a long chain fatty acid or salt thereof; a noncrosslinked polyacrylate type polymer and a bleach stable red colorant thereby forming a pink colored liquid gelled automatic dishwashing composition. The compositions are further characterized by a bulk density of at least 1.24 g/cc, such that the density of the polymeric phase and the density of the aqueous (continuous) phase are approximately the same.
REFERENCES:
patent: 5225096 (1993-07-01), Ahmed et al.
patent: 5252242 (1993-10-01), Shevade et al.
patent: 5395547 (1995-03-01), Broadwell et al.
patent: 5413727 (1995-05-01), Drapier et al.
patent: 5427707 (1995-06-01), Drapier et al.
patent: 5510047 (1996-04-01), Gabriel et al.
patent: 5929008 (1999-07-01), Goldstein
Colgate - Palmolive Company
Cotto Gregory Del
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