Cleaning composition

Patent metadata

Field	Value
Publication number	US-10465150-B2
Application number	US-201715585189-A
Country	US
Kind code	B2
Filing date	May 3, 2017
Priority date	May 3, 2016
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

A cleaning composition comprising a particle said particle comprising: (a) from 30 to 70% by weight thereof of a polymer having a softening point in the range from about 20° C. to about 60° C.; (b) from 20 to 60% by weight thereof of a first material having a BET surface area greater than 100 m2/g and a D50 from about 5 to about 20 μm; (c) from 3 wt % to 15% by weight thereof of a second material having a BET surface area from about 0.01 to about 5 m2/g and a D50 from about 30 to about 100 μm.

First claim

The invention claimed is:

1. A cleaning composition comprising a particle said particle comprising:
(a) from about 40 to about 60% by weight thereof of a polymer comprising from about 69 to about 89% of methylpolyethylene glycol (meth)acrylate and from about 9 to about 29% of a salt of 3-methyl-1-vinylimidazolium;
(b) from about 40 to about 50% by weight thereof of a silica having a BET surface area greater than 100 m2/g and a D50 from about 5 to about 20 μm;
(c) from about 4 wt % to about 10% by weight thereof of a sulfate having a BET surface area from about 0.01 to about 5 m2/g and a D50 from about 50 to about 80 μm; and
(d) citric acid,
wherein the residual salt in the silica is less than about 2%, by total weight of the silica.

2. A composition according to claim 1 wherein the composition is an automatic dishwashing composition.

3. A composition according to claim 1 wherein the composition or part thereof is in powder form.

4. A process for making a composition according to claim 1 said process comprising the steps of making the particle by:
a) admixing the silica and the sulfate materials;
b) adding the polymer in the form of an aqueous solution to the mixture resulting from step a);
c) drying the mixture resulting from step b); and
d) adding the particle to the remaining components of the composition.

5. A process for making a composition according to claim 1 said process comprising the steps of making the particle by:
a) admixing the silica and the sulfate materials;
b) adding the polymer in the form of an aqueous solution to the mixture resulting from step a) wherein the aqueous solution comprises from about 20% to about 50% by weight of the solution of the polymer;
c) drying the mixture resulting from step b); and
d) adding the particle to the remaining components of the composition.

6. A process for making a composition according to claim 1 wherein the particle is made by agglomeration.

7. A process for making a composition according to claim 1 said process comprising the steps of making the particle by:
a) admixing the silica and the sulfate materials;
b) adding the polymer in the form of an aqueous solution to the mixture resulting from step a);
c) drying the mixture resulting from step b) in a fluidized bed; and
d) adding the particle to the remaining components of the composition.

Assignees

• Procter & Gamble

Inventors

• Somerville Roberts Nigel Patrick
• Ellis Julie

Classifications

• C11D3/3769

  (Co)polymerised monomers containing nitrogen, e.g. carbonamides, nitriles or amines · CPC title

• C11D3/2086

  Hydroxy carboxylic acids-salts thereof · CPC title

• C11D3/08

  Silicates · CPC title

• C11D3/3776

  Heterocyclic compounds, e.g. lactam · CPC title

• C11D17/06

  Powder; Flakes; Free-flowing mixtures; Sheets · CPC title