Cleaning composition containing a polysaccharide graft polymer composition and methods of controlling hard water scale

• US 8,679,366 B2
• Filed: 07/30/2012
• Issued: 03/25/2014
• Est. Priority Date: 08/05/2011
• Status: Active Grant

• Current Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Original Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Inventors: Silvernail, Carter, Olson, Erik C.
• Primary Examiner(s): Mruk, Brian P
• Application Number:
  US13/561,553
• Publication Number:
  US 20130035276A1
• Time in Patent Office: 603 Days
• Field of Search: 510/247, 510/252, 510/267, 510/272, 510/339, 510/434, 510/435, 510/467, 510/470, 510/475, 510/505, 134/22.13, 134/22.14, 134/39, 134/41, 134/42, 252/175
• US Class Current: 252/175
• CPC Class Codes: C02F 5/145 combined with inorganic substances
• CPC Class Codes: C11D 3/044 Hydroxides or bases
• CPC Class Codes: C11D 3/361 Phosphonates, phosphinates or phosphonites
• CPC Class Codes: C11D 3/3788 Graft polymers

Abstract

A composition includes a polysaccharide graft polymer composition and 2-phosphonobutane-1,2,4-tricarboxylic acid. In one embodiment, the polysaccharide graft polymer composition includes a polysaccharide residue present in an amount from approximately 5% to approximately 90% by weight of the polysaccharide graft polymer composition and a residue of acrylic acid, methacrylic acid or a combination thereof present in an amount from approximately 10% to approximately 75% by weight of the polysaccharide graft polymer composition.

Claims

1. A cleaning composition comprising:

at least one alkali metal hydroxide present in an amount from about 20% to about 70% by weight of the cleaning composition;

water;

2-phosphonobutane-1,2,4-tricarboxylic acid or salts thereof present in an amount from about 0.5% to about 10% by weight of the cleaning composition; and

a polysaccharide graft polymer composition present in an amount from about 1% to about 10% by weight of the cleaning composition, the polysaccharide graft polymer comprising;

polysaccharide residue in an amount from approximately 5% to approximately 90% by weight of the polysaccharide graft polymer composition; and

residue of at least one ethylenically unsaturated monomer present in an amount from approximately 10% to approximately 75% by weight of the polysaccharide graft polymer composition.

2. The cleaning composition of claim 1, wherein the at least one ethylenically unsaturated monomer includes at least one anionic ethylenically unsaturated monomer.

3. The cleaning composition of claim 1, wherein the at least one ethylenically unsaturated monomer includes at least one member selected from the group consisting of acrylic acid, methacrylic acid, ethacrylic acid, α

-chloro-acrylic acid, α

-cyano acrylic acid, β

-methyl-acrylic acid (crotonic acid), α

-phenyl acrylic acid, β

-acryloxy propionic acid, sorbic acid, α

-chloro sorbic acid, angelic acid, cinnamic acid, p-chloro cinnamic acid, β

-styryl acrylic acid (1-carboxy-4-phenyl butadiene-1,3), itaconic acid, maleic acid, citraconic acid, mesaconic acid, glutaconic acid, aconitic acid, fumaric acid, tricarboxy ethylene, 2-acryloxypropionic acid, 2-acrylamido-2-methyl propane sulfonic acid, vinyl sulfonic acid, sodium methallyl sulfonate, sulfonated styrene, allyloxybenzene sulfonic acid, monomethyl maleate, and salts and combinations thereof.

4. The cleaning composition of claim 3, wherein the at least one ethylenically unsaturated monomer includes at least one member selected from acrylic acid, methacrylic acid, maleic acid, 2-acrylamido-2-methyl propane sulfonic acid, monomethyl maleate, and salts and combinations thereof.

5. The cleaning composition of claim 1, wherein the at least one alkali metal hydroxide includes sodium hydroxide, potassium hydroxide, lithium hydroxide or combinations thereof.

6. The cleaning composition of claim 1, wherein the polysaccharide graft polymer composition has a weight average molecular weight from approximately 2,000 g/mol to approximately 25,000 g/mol.

7. The cleaning composition of claim 1, wherein the cleaning composition contains about 10% or more biodegradable content by weight.

8. A method of preparing a use solution, the method comprising:

mixing water with a detergent composition to form the use solution, wherein the use solution comprises;

at least one alkali metal hydroxide present in an amount from about 1 ppm to about 1000 ppm;

2-phosphonobutane-1,2,4-tricarboxylic acid or salts thereof present in an amount from about 0.1 ppm to about 200 ppm; and

a polysaccharide graft polymer composition present in an amount from about 1 ppm to about 500 ppm, wherein the polysaccharide graft polymer composition comprises from about 5% to about 90% by weight polysaccharide residue and from about 10% to about 75% by weight residue of at least one ethylenically unsaturated monomer.

9. The method of claim 8, wherein the at least one ethylenically unsaturated monomer includes at least one anionic ethylenically unsaturated monomer.

10. The method of claim 8, wherein the at least one ethylenically unsaturated monomer includes at least one member selected from the group consisting of acrylic acid, methacrylic acid, ethacrylic acid, α

-chloro-acrylic acid, α

-cyano acrylic acid, β

-methyl-acrylic acid (crotonic acid), α

-phenyl acrylic acid, β

-acryloxy propionic acid, sorbic acid, α

-chloro sorbic acid, angelic acid, cinnamic acid, p-chloro cinnamic acid, β

-styryl acrylic acid (1-carboxy-4-phenyl butadiene-1,3), itaconic acid, maleic acid, citraconic acid, mesaconic acid, glutaconic acid, aconitic acid, fumaric acid, tricarboxy ethylene, 2-acryloxypropionic acid, 2-acrylamido-2-methyl propane sulfonic acid, vinyl sulfonic acid, sodium methallyl sulfonate, sulfonated styrene, allyloxybenzene sulfonic acid, monomethyl maleate, and salts and combinations thereof.

11. The method of claim 8, wherein the at least one ethylenically unsaturated monomer includes at least one member selected from acrylic acid, methacrylic acid, maleic acid, 2-acrylamido-2-methyl propane sulfonic acid, monomethyl maleate, and salt and combinations thereof.

12. A method for controlling hard water scale, the method comprising:

adding a polysaccharide graft polymer and 2-phosphonobutane-1,2,4-tricarboxylic acid or salts thereof to an aqueous system to control hard water scaling, wherein the polysaccharide graft polymer comprises;

residue of a polysaccharide present in an amount from about 5% to about 90% the polysaccharide graft polymer composition; and

residue of acrylic acid, methacrylic acid or combinations thereof present in amount from about 10% to about 75% weight of the polysaccharide graft polymer composition, and

wherein the polysaccharide graft polymer composition and 2-phosphonobutane-1,2,4-tricarboxylic acid or salts thereof are added in amounts such that the aqueous system includes about 1 to about 500 ppm polysaccharide graft polymer composition and from about 0.1 to about 200 ppm 2-phosphonobutane-1,2,4-tricarboxylic acid or salts thereof.

13. The method of claim 12, and further comprising:

adding at least one alkali metal hydroxide to the aqueous system to form a use solution.

14. The method of claim 12, wherein the polysaccharide graft polymer composition and the 2-phosphonobutane-1,2,4-tricarboxylic acid or salts thereof are present in a weight ratio from about 15:

1 to about 1;

15.

15. The method of claim 12, wherein the at least one ethylenically unsaturated monomer includes at least one anionic ethylenically unsaturated monomer.

16. The method of claim 12, wherein the at least one ethylenically unsaturated monomer includes at least one member selected from the group consisting of acrylic acid, methacrylic acid, ethacrylic acid, α

-chloro-acrylic acid, α

-cyano acrylic acid, β

-methyl-acrylic acid (crotonic acid), α

-phenyl acrylic acid, β

-acryloxy propionic acid, sorbic acid, α

-chloro sorbic acid, angelic acid, cinnamic acid, p-chloro cinnamic acid, β

-styryl acrylic acid (1-carboxy-4-phenyl butadiene-1,3), itaconic acid, maleic acid, citraconic acid, mesaconic acid, glutaconic acid, aconitic acid, fumaric acid, tricarboxy ethylene, 2-acryloxypropionic acid, 2-acrylamido-2-methyl propane sulfonic acid, vinyl sulfonic acid, sodium methallyl sulfonate, sulfonated styrene, allyloxybenzene sulfonic acid, monomethyl maleate, and salts and combinations thereof.