Surface treating compositions containing ammonioamidate compounds
AssigneeThe Procter & Gamble Company
InventorTerence James Rose
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Abstract
Surface-treating compositions containing ammonioamidate surface-active compounds able to exist in either cationic or zwitterionic form are disclosed. The compositions which contain a buffering agent to control pH and the cationic or zwitterionic character of the ammonioamidates are effective in the treatment of fabric or hard surfaces. Hair treating compositions and processes are disclosed. Methods of treating fabric and hard surfaces to provide fabric softening and soil-release properties are also disclosed.
Claims12
A surface-treating composition suitable for hair and fabric softening consisting essentially of:
- a. a substituted ammonioamidate having the formula
- R.sub.1 CO N.sup.- N.sup.+ R.sub.2 R.sub.3 R.sub.4
- or a cationic adduct thereof having the formula
- R.sub.1 CO NH N R.sub.2 R.sub.3 R.sub.4 .sup.+ X.sup.-
- wherein X is an anion;
- R.sub.1 is an alkyl, phenyl, or alkylphenyl group having 1 to 25 carbon atoms;
- each of R.sub.2 and R.sub.3 is a methyl, ethyl, hydroxymethyl, hydroxyethyl or cyanoethyl group;
- and R.sub.4 is either an alkyl having 1 to 25 carbon atoms or:
- ##EQU1## wherein each of R.sub.5 and R.sub.6 is a hydrogen or an alkyl group with 1 to 4 carbon atoms, and R.sub.7 is a group defined as R.sub.1, benzyl or hydrogen, provided that at least one of R.sub.1 and R.sub.4 contains an alkyl group with at least 8 carbon atoms, said compound having a pKa value of from about 5 to about 7;
- and
- b. a pH buffering compound selected from the group consisting of:
- i. the alkali metal acid salts of phosphoric acid, and the polyphosphoric acids;
- ii. the acids and corresponding alkali metal salts of weak organic acids, and;
- iii. boric acid and borates;
- or mixtures thereof in an amount sufficient to maintain the pH of a solution containing component (a) at a level of from about 0.001 to about 0.5 percent by weight at less than, equal to, or not greater than 2 pH units above the pKa of component (a).
A fabric softening composition consisting essentially of:
- a. a substituted ammonioamidate having the formula
- R.sub.1 CO N.sup.- N.sup.+ R.sub.2 R.sub.3 R.sub.4
- or a cationic adduct thereof having the formula
- R.sub.1 CO NH N R.sub.2 R.sub.3 R.sub.4 .sup.+ X.sup.-
- wherein X is an anion;
- R.sub.1 is an alkyl, phenyl, or alkylphenyl group having 1 to 25 carbon atoms;
- each of R.sub.2 and R.sub.3 is a methyl, ethyl, hydroxymethyl, hydroxyethyl or cyanoethyl group;
- and R.sub.4 is either an alkyl having 1 to 25 carbon atoms or:
- ##EQU2## wherein each of R.sub.5 and R.sub.6 is a hydrogen or an alkyl group with 1 to 4 carbon atoms, and R.sub.7 is a group defined as R.sub.1, provided that at least one of R.sub.1 and R.sub.4 contains an alkyl group with at least 8 carbon atoms, said compound having a pKa value of from about 5 to about 7;
- and
- b. a pH buffering compound selected from the group consisting of the acids and corresponding alkali metal salts of citric acid, lactic acid, glycolic acid, malic acid, tartaric acid, acetic acid, capric acid, benzoic acid, and adipic acid;
- or mixtures thereof wherein the buffering compound is present in amount sufficient to maintain the pH of a solution containing component (a) at a level of from about 0.02 to about 0.2 percent by weight at less than, equal to, or not greater than 2 pH units above the pKa of component (a).
Dependencies are inferred from the claim text.