Bleaching compositions
AssigneeThe Procter & Gamble Company
InventorsStanley Y. Chung, Gianfranco L. Spadini
Life of this patent
Estimating the term…
Abstract
This invention relates to bleaching compositions that provide effective and efficient surface bleaching of textiles over a wide range of bleach solution temperatures. Surface bleaching of textiles is bleaching wherein the bleaching mechanism takes place on the textile surface and, thereby, removes stains and/or soils. The bleaching compositions within the invention contain peroxygen bleaches capable of yielding hydrogen peroxide in aqueous solutions and specific bleach activators at specific molar ratios of hydrogen peroxide to bleach activator. In a highly preferred embodiment the bleaching compositions within the invention are detergent compositions.
Claims22
A bleaching composition comprising:
- (a) a peroxygen bleaching compound capable of yielding hydrogen peroxide in an aqueous solution;
- and
- (b) a bleach activator having the general formula:
- ##STR10## wherein R is an alkyl group containing from about 5 to about 18 carbon atoms wherein the longest linear alkyl chain extending from and including the carbonyl carbon contains from about 6 to about 10 carbon atoms and L is a leaving group, the conjugate acid of which has a pK.sub.a in the range of from about 6 to about 13;
- wherein the molar ratio of hydrogen peroxide yielded by (a) to bleach activator (b) is greater than about 1.5.
A bleaching composition comprising, by weight:
- (a) from about 1% to about 60% of a peroxygen bleaching compound capable of yielding hydrogen peroxide in an aqueous solution;
- (b) from about 0.5% to about 40% of a bleach activator having the general formula:
- ##STR16## wherein R is an alkyl group containing from about 5 to about 18 carbon atoms wherein the longest linear alkyl chain extending from and including the carbonyl carbon contains from about 6 to about 10 carbon atoms and L is a leaving group, the conjugate acid of which has a pK.sub.a in the range of from about 6 to about 13;
- wherein the molar ratio of hydrogen peroxide yielded by (a) to bleach activator (b) is greater than about 1.5;
- and
- (c) from about 1% to about 30% of a detergent surfactant.
Dependencies are inferred from the claim text.