Automatic dishwashing detergent

Patent metadata

Field	Value
Publication number	US-2016355756-A1
Application number	US-201415101049-A
Country	US
Kind code	A1
Filing date	Nov 21, 2014
Priority date	Dec 20, 2013
Publication date	Dec 8, 2016
Grant date	—

Abstract

A dishwashing detergent comprising a builder; a surfactant; a first polymer comprising monoethylenically unsaturated C3-C6 carboxylic acid units and C1-C12 alkyl (meth)acrylate units; and a dispersant comprising a second polymer comprising monoethylenically unsaturated C3-C6 carboxylic acid units.

First claim

1 . A phosphate-free dishwashing composition, comprising:
5 to 99 wt % of a builder; 0.1 to 15 wt % of a surfactant of Formula 1, Formula 2, or a combination thereof,
R 1 O—(CH 2 CH 2 O) m —(CH 2 CHR 2 O) n —R 3   (1),

R 3 O—(CH 2 CHR 2 O) n/2 —(CH 2 CH 2 O) m/2 —R 5 O—(CH 2 CH 2 O) m/2 —(CH 2 CHR 2 O) n/2 —R 3   (2),

wherein R 1 is a C 8 -C 24 alkyl group, R 2 is a C 1 -C 5 alkyl group, R 3 is hydrogen, a C 1 -C 12 alkyl group, a C 1 -C 12 arylalkyl group, or a group represented by the Formula 3,
—CH 2 CH(OH)CH 2 -E-R 4 ,  (3)

wherein E is a C 1 -C 8 alkylene group or an oxygen atom, and R 4 is a C 1 -C 8 alkyl group,
m is a number between 1 and 100, and n is a number between 0 and 50, and R 5 is a C 1 -C 8 alkylene group;
0.05 and 5 wt % of a first polymer having a weight-average molecular weight between 35,000 and 100,000 g/mol and comprising
22 to 80 wt % of monoethylenically unsaturated C 3 -C 6 carboxylic acid units, and
20 to 78 wt % of C 1 -C 12 alkyl (meth)acrylate units; and

0.5 to 10 wt % of a dispersant comprising a second polymer having a weight-average molecular weight between 1,000 and 30,000 g/mol and comprising 50 to 100 wt % of monoethylenically unsaturated C 3 -C 6 carboxylic acid units;
wherein the phosphate-free dishwashing composition comprises less than 0.5 wt % of a phosphate-containing compound, based on a total weight of the dishwashing composition.

2 . The composition of claim 1 , wherein the surfactant is a low foam surfactant.

3 . The composition of claim 1 , wherein R 1 is a linear C 10 -C 18 alkyl group, R 2 is a methyl or ethyl group, and R 3 is hydrogen.

4 . The composition of claim 1 , wherein the monoethylenically unsaturated C 3 -C 6 carboxylic acid units of the first polymer are methacrylic acid units, acrylic acid units, or a combination thereof.

5 . The composition of claim 1 , wherein the first polymer comprises
10 to 80 wt % of methacrylic acid units, 0 to 30 wt % of acrylic acid units, and 20 to 70 wt % of C 1 -C 12 alkyl (meth)acrylate units.

6 . The composition of claim 1 , wherein the C 1 -C 12 alkyl (meth)acrylate is ethyl acrylate, butyl acrylate, or a combination thereof.

7 . The composition of claim 1 , wherein the first polymer comprises
10 to 34 wt % of methacrylic acid units, 10 to 20 wt % of acrylic acid units, and 46 to 70 wt % of C 1 -C 12 alkyl (meth)acrylate units.

8 . The composition of claim 1 , wherein the first polymer comprises
55 to 80 wt % of methacrylic acid units, 10 to 35 wt % of ethyl acrylate units, and 10 to 35 wt % of butyl acrylate units.

9 . The composition of claim 1 , wherein the composition comprises less than 0.1 wt % of the phosphate-containing compound.

10 . The composition of claim 1 , the composition comprises 0 to less than 0.01 wt % of a phosphate-containing compound.

11 . The composition of claim 1 , wherein the first polymer is a product of free-radical emulsion polymerization in the presence of a C 2 -C 24 alkanethiol.

12 . The composition of claim 1 , wherein the phosphate-containing compound comprises a phosphate and an oligophosphate; and wherein a total content of the phosphate and the oligophosphate compound, if present in the phosphate-free dishwashing composition, is less than 0.05 wt %, based on a total weight of the dishwashing composition.

13 . The composition of claim 1 , wherein the composition is sealed in a pouch comprising at least one chamber, in which a content of each chamber is the same or different.

14 . A phosphate-free dishwashing composition, comprising:
5 to 99 wt % of a builder; 1 to 8 wt % of a surfactant of Formula 1,
R 1 O—(CH 2 CH 2 O) m —(CH 2 CHR 2 O) n —R 3   (1),

wherein R 1 is a C 8 -C 24 alkyl group, R 2 is a C 1 -C 5 alkyl group, R 3 is hydrogen, m is a number between 10 and 30, and n is a number between 0 and 8;
0.05 and 1 wt % of a first polymer having a weight-average molecular weight between 35,000 and 100,000 g/mol and comprising
22 to 80 wt % of monoethylenically unsaturated C 3 -C 6 carboxylic acid units, and
20 to 78 wt % of C 1 -C 12 alkyl acrylate units; and

1 to 8 wt % of a dispersant comprising a second polymer having a weight-average molecular weight between 1,000 and 30,000 g/mol and comprising 50 to 100 wt % of monoethylenically unsaturated C 3 -C 6 carboxylic acid units;
wherein the phosphate-free dishwashing composition comprises less than 0.5 wt % of a phosphate-containing compound, based on a total weight of the dishwashing composition.

15 . The composition of claim 14 , wherein the composition comprises less than 0.1 wt % of the phosphate-containing compound.

16 . A method of dishwashing, the method comprising contacting a surface to be washed with the dishwashing composition of claim 1 .

17 . A method of manufacturing a dishwashing composition, the method comprising contacting
5 to 99 wt % of a builder; 0.1 to 15 wt % of a surfactant of Formula 1, Formula 2, or a combination thereof,
R 1 O—(CH 2 CH 2 O) m —(CH 2 CHR 2 O) n —R 3   (1),

R 3 O—(CH 2 CHR 2 O) n/2 —(CH 2 CH 2 O) m/2 —R 5 O—(CH 2 CH 2 O) m/2 —(CH 2 CHR 2 O) n/2 —R 3   (2),

wherein R 1 is a C 8 -C 24 alkyl group, R 2 is a C 1 -C 5 alkyl group, R 3 is hydrogen or a C 1 -C 12 alkyl or arylalkyl group or a group represented by the Formula 3,
—CH 2 CH(OH)CH 2 -E-R 4 ,  (3),

wherein E is a C 1 -C 8 alkylene group or an oxygen atom, and R 4 is a C 1 -C 8 alkyl group,
m is a number between 1 and 100, and n is a number between 0 and 50, and R 5 is a C 1 -C 8 alkylene group;
0.05 and 5 wt % of a first polymer having a weight-average molecular weight between 35,000 and 100,000 g/mol and comprising
22 to 80 wt % of monoethylenically unsaturated C 3 -C 6 carboxylic acid units, and
20 to 78 wt % of C 1 -C 12 alkyl (meth)acrylate units; and

0.5 to 10 wt % of a dispersant comprising a second polymer having a weight-average molecular weight between 1,000 and 30,000 g/mol and comprising 50 to 100 wt % of monoethylenically unsaturated C 3 -C 6 carboxylic acid units;
wherein the dishwashing composition comprises less than 0.5 wt % of a phosphate-containing compound, based on a total weight of the dishwashing composition.

Assignees

• Rohm & Haas
• Union Carbide Chem Plastic

Inventors

• Krasnansky Robert
• Ferrieux Severine
• Ammeux Bertrand
• Shulman Jan Edward
• Wasserman Eric P

Classifications

• C11D1/722

  Ethers of polyoxyalkylene glycols having mixed oxyalkylene groups; {Polyalkoxylated fatty alcohols or polyalkoxylated alkylaryl alcohols with mixed oxyalkylele groups (C11D1/721 takes precedence)} · CPC title

• C11D1/8255

  containing a combination of compounds differently alcoxylised or with differently alkylated chains · CPC title

• C11D3/3757

  (Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions · CPC title

• C11D3/08

  Silicates · CPC title

• C11D1/825

  Mixtures of compounds all of which are non-ionic · CPC title