Detergent composition comprising synergistic hydrotrope mixture of two classes of organic phosphate esters
AssigneeGAF Corporation
InventorsParitosh M. Chakrabarti, Richard A. Grifo
Life of this patent
Estimating the term…
Abstract
The invention relates to a detergent composition comprising a low-foaming, non-ionic surfactant and a synergistic hydrotrope mixture. The hydrotrope mixture is composed of two classes of organic phosphate esters A and B wherein A is the reaction product of a compound of the formula R -- OCH.sub.2 CH.sub.2 --.sub.n OH wherein R is alkyl, aryl, aralkyl, or alkaryl and n is 1 to 10, with phosphorus pentoxide and B is the reaction product of a compound of the above formula with polyphosphoric acid. The weight ratio of A:B is 1:9 to 9:1. The composition may further comprise an alkaline builder.
Claims8
A detergent composition consisting essentially of
- I. a low-foaming, non-ionic surfactant and,
- Ii. a synergistic hydrotrope mixture of;
- A. a first phosphate ester which is the reaction product of:
- (1) phosphorus pentoxide with
- (2) a compound of Formula I:
- r -- och.sub.2 -- ch.sub.2 --.sub.n OH (I)
- wherein R is alkyl, aryl, aralkyl or alkaryl and
- wherein n is 1 to 10,
- and the molar ratio of (1) to (2) is 1:2 to 1:4.5 and
- B. a second phosphate ester which is the reaction product of:
- (1) 105-130% polyphosphoric acid with
- (2) a compound of Formula I and the molar ratio of (1) to (2) is 1:0.3 to 1:1.5 and wherein the weight ratio of A:B is 1:9 to 9:1, and
- Iii. a builder selected from the group consisting of alkali metal hydroxides, carbonates, bicarbonates, phosphates, silicates, sulfates, and chlorides.
A detergent composition consisting essentially of
- I. a low-foaming non-ionic surfactant and,
- Ii. a synergistic hydrotrope mixture of:
- A. a first phosphate ester which is the reaction product of:
- (1) phosphorus pentoxide with
- (2) a compound of Formula I:
- R -- OCH.sub.2 -- CH.sub.2 --.sub.n OH (I)
- wherein R is an alkyl group with 4 to 10 carbon atoms, a phenyl group or an alkyl-phenylene group whose alkyl portion has 1 to 4 carbon atoms and wherein n is 1 to 10, and the molar ratio of (1) to (2) is 1:2 to 1:4 and
- B. a second phosphate ester which is the reaction product of
- (1) 110-120% polyphosphoric acid with
- (2) a compound of Formula I wherein the molar ratio of (1) to (2) is 1:0.75 to 1:1.25, and wherein the weight ratio of A:B is 1:4 to 4:1, and
- Iii. a builder selected from the group consisting of alkali metal hydroxides, carbonates, bicarbonates, phosphates, silicates, sulfates and chlorides.
Dependencies are inferred from the claim text.