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US 5,759,990 AGranted
Concentrated fabric softening composition with good freeze/thaw recovery and highly unsaturated fabric softener compound therefor
AssigneeThe Procter & Gamble Company
InventorsErrol Hoffman Wahl, Helen Bernardo Tordil, Toan Trinh, Eugene Robert Carr, Robert Otis Keys, Laura Marie Meyer
Life of this patent
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Abstract
Biodegradable fabric softener compounds that contain ester linkages a substantial level of polyunsaturation in the hydrophobic chains. The compounds can be used to form fabric softening compositions that are aqueous dispersions of the compounds or clear compositions. These compositions have a desirable low viscosity and recover, after freezing and thawing to have a stable low viscosity.
Claims10
Biodegradable softener active selected from the group consisting of:
- (1) compounds having the formula:
- (R).sub.4-m --N.sup.(+) --(CH.sub.2).sub.n --Y--R.sup.1 !.sub.m !X.sup.(-)( 1)
- wherein each R substituent is a short chain C.sub.1 -C.sub.6 alkyl or hydroxyalkyl group, benzyl, or mixtures thereof;
- each m is 2 or 3;
- each n is from 1 to about 4;
- each Y is --O--(O)C--, or --C(O)--O--;
- each R.sup.1 is a hydrocarbyl, or substituted hydrocarbyl, group, the sum of carbons in each R.sup.1, plus one when Y is --O--(O)C--, being C.sub.12 -C.sub.22 ;
- the average Iodine Value of the parent fatty acid of the R.sup.1 group being from about 60 to about 140;
- wherein the counterion, X.sup.- is any softener-compatible anion;
- the level of softener active containing polyunsaturated alkylene groups being at least about 3% by weight of the total softener active present;
- and wherein said softener active can comprise up to about 20% of monoester compound in which m is 2 and one YR.sup.1 is H or --C(O)OH;
- 2. compounds having the formula:
- ##STR8## wherein each Y, R, R.sup.1, and X.sup.(-) have the same meanings as before and wherein said softener active can comprise up to about 20% of monoester compound in which one YR.sup.1 is H or --C(O)OH;
- and
- 3. mixtures thereof.
12 more elements
Clear, aqueous fabric softener composition comprising:
- A. from about 2% to about 80% by weight of the composition, of biodegradable fabric softener active selected from the group consisting of:
- 1. compounds having the formula:
- (R).sub.4-m --N.sup.(+) --(CH.sub.2).sub.n --Y--R.sup.1 !.sub.m !X.sup.(-)( 1)
- wherein each R substituent is a short chain C.sub.1 -C.sub.6 alkyl or hydroxyalkyl, group;
- each m is 2 or 3;
- each n is from 1 to about 4;
- each Y is --O--(O)C--, or --C(O)--O--;
- the sum of carbons in each R.sup.1, plus one when Y is --O--(O)C--, is C.sub.12 -C.sub.22, with each R.sup.1 being a hydrocarbyl, or substituted hydrocarbyl, group, with the softener active containing polyunsaturated alkylene groups being at least about 3% by weight of the total softener active present;
- wherein the counterion, X.sup.-, can be any softener-compatible anion;
- and wherein said softener active can comprise up to about 20% of monoester compound in which m is 2 and one YR.sup.1 is H or --C(O)OH;
- 2. compounds having the formula:
- ##STR9## wherein each Y, R, R.sup.1, and X.sup.(-) have the same meanings as before and wherein said softener active can comprise up to about 20% of monoester compound in which one YR.sup.1 is H or --C(O)OH;
- and
- 3.
11 more elements
Dependencies are inferred from the claim text.