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US 5,501,815 AGranted
Plasticware-compatible rinse aid
AssigneeEcolab Inc.
InventorVictor F. Man
Life of this patent
Estimating the term…
Abstract
A plasticware-compatible low-foaming rinse aid and method for using such rinse-aid to effectuate sheeting of aqueous rinse liquid from solid surface. The rinse aid comprises alkyl polyglycoside (APG) and reverse, polyoxyethylene-containing polyoxyalkylene block copolymer. The aqueous rinse solution obtained by diluting the rinse aid with water is compatible with thermoplastics such as polycarbonate and polysulfone.
Claims20
An aqueous rinse aid, comprising:
- (a) about 5-10 wt-% of an alkyl polyglycoside;
- and
- (b) about 5-40 wt-% of a nonionic, reverse, polyoxyethylene-containing polyoxyalkylene block copolymer having an ethylene oxide content of less than about 50 wt-% of the copolymer comprising --(EO).sub.x --(PO).sub.y, wherein EO is ethylene oxide, PO is propylene oxide, x is from 1 to 1000, and y is from 1 to 500, wherein the rinse aid upon dilution with water results in an aqueous rinse solution having desired sheeting, low-foaming characteristics and compatibility with plasticware.
An aqueous rinse aid comprising:
- (a) an alkyl polyglycoside which comprises one to three reducing saccharide units, each of which containing 5 or 6 carbon atoms, and a saturated or unsaturated fatty aliphatic group containing 5 to 30 carbon atoms, and the alkyl polyglycoside constitutes 5% to 10% by weight of the rinse aid;
- and
- (b) a nonionic, reverse polyoxyalkylene block copolymer comprising --(EO).sub.x --(PO).sub.y wherein x is 5 to 20 and y is 5 to 20, and the nonionic, reverse polyoxyalkylene block copolymer constitutes 5% to 40% of the rinse aid and the EO content is less than about 50 wt-% of the copolymer;
- wherein the rinse aid, when diluted with water in a ratio of rinse aid:water of 5 ppm to 10,000 ppm by weight, results in an aqueous rinse solution having desired sheeting, low-foaming characteristics, and compatibility with plasticware.
1 more element
An aqueous rinse solution comprising:
- (a) an alkyl polyglycoside;
- and
- (b) a nonionic, reverse, polyoxyethylene-containing polyoxyalkylene block copolymer having an ethylene oxide content of less than about 50 wt-% of the copolymer, wherein the ratio of polyglycoside to copolymer is about 1:1 to 1:8;
- and
- wherein the aqueous rinse solution has desired sheeting, low-foaming characteristics and compatibility with thermoplastics.
2 more elements
An aqueous rinse solution comprising:
- (a) an alkyl polyglycoside which comprises one to three reducing saccharide units, each of which containing 5 or 6 carbon atoms, and a saturated or unsaturated fatty aliphatic group containing 5 to 30 carbon atoms, the alkyl polyglycoside constitutes 5 to 10,000 ppm of the aqueous rinse solution;
- and
- (b) a nonionic, reverse polyoxyalkylene block copolymer which comprises --(EO).sub.x (PO).sub.y wherein x is 5 to 20 and y is 5 to 20, the nonionic, reverse polyoxyalkylene block copolymer constitutes 5 to 10,000 ppm of the aqueous rinse solution;
- wherein the aqueous rinse solution has desired sheeting, low-foaming characteristics, and compatibility with plasticware.
1 more element
A method of cleaning plasticware, comprising:
- (a) contacting the plasticware with an aqueous cleaning agent in a ware washing machine to produce cleaned ware;
- and
- (b) contacting the cleaned ware with an aqueous rinse solution, the aqueous rinse solution comprising:
- (A) about 5-10 wt-% of an alkyl polyglycoside;
- (B) about 5-40 wt-% of a nonionic, reverse polyoxyethylene-containing polyoxyalkylene block copolymer having an ethylene oxide content of less than about 50 wt-% of the copolymer;
- wherein the aqueous rinse solution has desired sheeting, low-foaming characteristics and compatibility with plasticware.
3 more elements
Dependencies are inferred from the claim text.