US4968445A
Expired / Lapsed
US
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Thixotropic aqueous liquid automatic dishwashing detergent composition
Assignee: Colgate Palmolive Co
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Filing: 1989-03-13
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Granted: 1990-11-06
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Expires: 2009-03-13
Abstract
Abstract Thixotropic aqueous liquid automatic dishwashing detergent composition with improved anti-filming properties and method of using the detergent composition. The detergent composition comprises silica anti-filming agent, inorganic builder salts, chlorine bleach, bleach-stable detergent and a thixotropic thickener. The compositions provide reduced filming on dishware, glassware, china and the like, particularly in hard water, and remain stable against phase separation.
Inventors
- 👤 Fahim U. Ahmed
- 👤 Charles E. Buck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:46
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/0008; C11D17/003; C11D3/00; C11D3/02; C11D3/12; C11D3/124; C11D3/395; C11D3/3956
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
76 words
An anti-filming gel-like thixotropic aqueous liquid automatic dishwashing detergent composition comprising water, at least one ingredient selected from the group consisting of organic detergent, bleach, detergent builder, sequestering agent, foam inhbitors, and mixtures thereof, a nonabrasive amount of from about 0.5 to 5% of a silica anti-filming agent having a particle size of about 0.1 to 10 microns and a sufficient amount of a thixotropic thickener to provide a thixotropic index of about 2.5 to 10.
Claim 2
Dependent Claim
76 words
An anti-filming gel-like thixotropic aqueous liquid automatic dishwashing detergent composition comprising water, at least one ingredient selected from the group consisting of organic detergent, bleach, detergent builder, sequestering agent, foam inhbitors, and mixtures thereof, a nonabrasive amount of from about 0.5 to 5% of a silica anti-filming agent having a particle size of about 0.1 to 10 microns and a sufficient amount of a thixotropic thickener to provide a thixotropic index of about 2.5 to 10.
Claim 3
Dependent Claim
18 words
The composition of claim 1 wherein the silica anti-filming is in an amount of about 1 to 4%.
Claim 4
Dependent Claim
118 words
An anti-filming thixotropic aqueous liquid automatic dishwasher composition comprising approximately by weight: (a) 5 to 35% detergent builder; (b) 2.5 to 40% sodium silicate; (c) a nonabrasive amount of 0.5 to 5% of silica anti-filming agent having a particle size of about 0.1 to 10 microns; (d) 0 to 9% alkali metal carbonate; (e) 0.1 to 5% chlorine bleach stable, water-dispersible organic detergent active material; (f) 0 to 5% chlorine bleach stable foam depressant; (g) chlorine bleach compound in an amount to provide about 0.2 to 4% of available chlorine; (h) a sufficient amount of a thixotropic thickener to provide a thixotropic index of about 2.5 to 10. (i) 0 to 8% of sodium hydroxide; (j) balance water.
Claim 5
Dependent Claim
118 words
An anti-filming thixotropic aqueous liquid automatic dishwasher composition comprising approximately by weight: (a) 5 to 35% detergent builder; (b) 2.5 to 40% sodium silicate; (c) a nonabrasive amount of 0.5 to 5% of silica anti-filming agent having a particle size of about 0.1 to 10 microns; (d) 0 to 9% alkali metal carbonate; (e) 0.1 to 5% chlorine bleach stable, water-dispersible organic detergent active material; (f) 0 to 5% chlorine bleach stable foam depressant; (g) chlorine bleach compound in an amount to provide about 0.2 to 4% of available chlorine; (h) a sufficient amount of a thixotropic thickener to provide a thixotropic index of about 2.5 to 10. (i) 0 to 8% of sodium hydroxide; (j) balance water.
Claim 6
Dependent Claim
23 words
The composition of claim 3 wherein the thixotropic thickener comprises a long chain fatty acid in an amount of about 0.03 to 0.5%.
Claim 7
Dependent Claim
28 words
The composition of claim 3 wherein the thixotropic thickener comprises a polyvalent metal salt of a long chain fatty acid in an amount of about 0.02 to 1.0%.
Claim 8
Dependent Claim
19 words
The composition of claim 4 additionally comprising a clay thixotropic thickener in an amount of about 0.1 to 3.0%.
Claim 9
Dependent Claim
19 words
The composition of claim 5 additionally comprising a clay thixotropic thickener in an amount of about 0.1 to 3.0%.
Claim 10
Dependent Claim
20 words
The composition of claim 3 wherein the silica anti-filming agent has a particle size of about 0.5 to 8.0 microns.
Claim 11
Dependent Claim
120 words
An anti-filming thixotropic aqueous liquid automatic dishwasher composition comprising approximately by weight: (a) 5 to 35% alkali metal tripolyphosphate; (b) 2.5 to 40% sodium silicate; (c) a nonabrasive amount of 1 to 4% silica anti-filming agent having a particle size of about 0.5 to 8.0 microns; (d) 0 to 9% alkali metal carbonate; (e) 0.1 to 5% chlorine bleach stable, water dispersible organic detergent active material; (f) 0 to 5% chlorine bleach stable foam depressant; (g) chlorine bleach compound in an amount to provide about 0.2 to 4% of available chlorine; (h) a sufficient amount of a thixotropic thickener to provide a thixotropic index of about 2.5 to 10; (i) 0 to 8% of sodium hydroxide; and (j) balance water.
Claim 12
Dependent Claim
120 words
An anti-filming thixotropic aqueous liquid automatic dishwasher composition comprising approximately by weight: (a) 5 to 35% alkali metal tripolyphosphate; (b) 2.5 to 40% sodium silicate; (c) a nonabrasive amount of 1 to 4% silica anti-filming agent having a particle size of about 0.5 to 8.0 microns; (d) 0 to 9% alkali metal carbonate; (e) 0.1 to 5% chlorine bleach stable, water dispersible organic detergent active material; (f) 0 to 5% chlorine bleach stable foam depressant; (g) chlorine bleach compound in an amount to provide about 0.2 to 4% of available chlorine; (h) a sufficient amount of a thixotropic thickener to provide a thixotropic index of about 2.5 to 10; (i) 0 to 8% of sodium hydroxide; and (j) balance water.
Claim 13
Dependent Claim
22 words
The composition of claim 8 wherein the silica anti-filming agent contains about 0.1 to 5% of alumina, based on weight of silica.
Claim 14
Dependent Claim
18 words
The composition of claim 8 wherein the silica has a particle size of about 1 to 5 microns.
Claim 15
Dependent Claim
31 words
The composition of claim 9 wherein the thixotropic thickener comprises a long chain fatty acid having C 16 to C 20 carbon atoms in an amount of about 0.03 to 0.20%.
Claim 16
Dependent Claim
36 words
The composition of claim 9 wherein the thixotropic thickener comprises a polyvalent metal salt of a long chain fatty acid having C 16 to C 20 carbon atoms in an amount of about 0.06 to 0.8%.
Claim 17
Dependent Claim
17 words
The composition of claim 13 wherein the polyvalent metal is one of aluminum, calcium, zinc and magnesium.
Claim 18
Dependent Claim
19 words
The composition of claim 12 additionally comprising a clay thixotropic thickener in an amount of about 0.1 to 2.5%.
Claim 19
Dependent Claim
19 words
The composition of claim 13 additionally comprising a clay thixotropic thickener in an amount of about 0.1 to 2.5%.
Claim 20
Dependent Claim
45 words
A method for cleaning soiled glassware and dishware which comprises contacting the soiled dishware in an automatic dishwashing machine in an aqueous washbath having dispersed therein an effective amount of the composition of claim 3 to obtain clean glassware and dishware substantially free of film.
Claim 21
Dependent Claim
47 words
A method for cleaning soiled glassware and dishware which comprises contacting the soiled glassware and dishware in an automatic dishwashing machine in an aqueous washbath having dispersed therein an effective amount of the composition of claim 9 to obtain clean glassware and dishware substantially free of film.
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