Solidification matrix comprising a carboxylic acid terpolymer

Patent metadata

Field	Value
Publication number	US-9487738-B2
Application number	US-201314049989-A
Country	US
Kind code	B2
Filing date	Oct 9, 2013
Priority date	Oct 9, 2013
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

Stability enhancement agents for use in a solidification matrices and solid detergent compositions are described. Stability enhancement is provided by a hydratable salt, water and a carboxylic acid terpolymer forming a dimensionally stable solid compositions. Preferred carboxylic acid terpolymers include from about 40 to 90% by weight of a carboxylic acid monomer, anhydride or salt thereof, from about 4 to 40% by weight of a monomer comprising sulfo groups, and from about 4 to 40% by weight of a nonionic monomer set forth in formula (I). The stability enhancement composition for use in solid detergent compositions are preferably biodegradable and may be substantially free of phosphate and/or NTA-free and provide beneficial hard water scale control.

First claim

What is claimed is:

1. A solid detergent composition comprising:
between about 1 wt-% and about 15 wt-% of a terpolymer (A), said terpolymer (A) comprising in copolymerized form of about 75% by weight of acrylic acid, of about 20% by weight of 2-acrylamido-2-methylpropanesulfonic acid, and of about 5% by weight of a nonionic monomer of the formula (I)
H 2 C═CH—CH 2 —O[EO] 17 —H  (I)

in which EO is ethylene oxide units;
between about 0.1 wt-% and about 50 wt-% water;
between 65 wt-% and about 95 wt-% alkali metal carbonate; and
between about 0.5 wt-% and about 10 wt-% surfactant;
wherein the solid detergent composition is dimensionally stable and has a growth exponent of less than 3% if heated at a temperature of 122° F. for two weeks.

2. The composition of claim 1 , wherein the terpolymer (A) further comprises in copolymerized form up to about 30% by weight of one or more further ethylenically unsaturated monomers.

3. The composition of claim 1 , further comprising a phosphonate detergent builder.

4. The composition of claim 3 , wherein the phosphonate detergent builder is in an amount less than about 5 wt-%.

5. The composition of claim 1 , wherein the surfactant is a nonionic surfactant.

6. The composition of claim 5 , wherein the nonionic surfactant comprises an alkoxylated surfactant.

7. The composition of claim 6 , wherein the alkoxylated surfactant is in an amount between about 1 wt. % and about 10 wt. %.

8. The composition of claim 5 , wherein the nonionic surfactant is an EO/PO copolymer.

9. The composition of claim 1 , wherein the terpolymer (A) is in an amount between about 1 wt-% and about 10 wt-%.

10. The composition of claim 1 , wherein the ratio of sodium carbonate to water is about 9.8.

11. The composition of claim 1 , wherein the surfactant is a nonionic surfactant and/or the composition further comprises at least one functional ingredient selected from the group consisting of: chelating agents, sequestering agents, inorganic detergents, organic detergents, alkaline sources, builders, water conditioners, rinse aids, hardening agents, bleaching agents, sanitizers, activators, fillers, defoaming agents, anti-redeposition agents, optical brighteners, dyes, odorants, stabilizing agents, dispersants, enzymes, corrosion inhibitors, thickeners and solubility modifiers.

12. A method of forming a solid detergent composition according to claim 1 comprising:
combining said alkali metal carbonate, water surfactant and terpolymer (A); and forming a cast, pressed, or extruded solid.

13. The method of claim 12 , wherein the surfactant is a nonionic surfactant and/or the solid detergent composition further comprises at least one functional ingredient selected from the group consisting of: chelating agents, sequestering agents, inorganic detergents, organic detergents, alkaline sources, builders, water conditioners, rinse aids, hardening agents, bleaching agents, sanitizers, activators, fillers, defoaming agents, anti-redeposition agents, optical brighteners, dyes, odorants, stabilizing agents, dispersants, enzymes, corrosion inhibitors, thickeners and solubility modifiers.

14. A method of forming the solid detergent composition of claim 1 comprising the steps of:
combining the alkali metal carbonate, the surfactant and at least one functional component to form a powder pre-mix;
mixing the powder pre-mix with a liquid pre-mix, the liquid pre-mix comprising the water and the
casting, pressing, and/or extruding the mixture obtained from mixing the power pre-mix with the liquid pre-mix.

15. The method of claim 14 , wherein the functional component is selected from the group consisting of: chelating agents, sequestering agents, inorganic detergents, organic detergents, alkaline sources, builders, water conditioners, rinse aids, hardening agents, bleaching agents, sanitizers, activators, fillers, defoaming agents, anti-redeposition agents, optical brighteners, dyes, odorants, stabilizing agents, dispersants, enzymes, corrosion inhibitors, thickeners and solubility modifiers.

Assignees

• Ecolab Usa Inc
• Basf Se

Inventors

• Walters Kerrie
• Silvernail Carter M
• Detering Juergen
• Kingma Arend Jouke
• Dailey James S

Classifications

• C11D3/0036

  Soil deposition preventing compositions; Antiredeposition agents · CPC title

• C11D3/10 Primary

  Carbonates {; Bicarbonates} · CPC title

• C11D3/378 Primary

  (Co)polymerised monomers containing sulfur, e.g. sulfonate · CPC title

• C11D17/0052

  Cast detergent compositions · CPC title

• C11D17/0047 Primary

  Detergents in the form of bars or tablets · CPC title