US4532067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid detergent compositions containing hydroxypropyl methylcellulose
Assignee: Lever Brothers Co
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Filing: 1984-01-11
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Granted: 1985-07-30
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Expires: 2004-01-11
Abstract
Abstract An aqueous liquid detergent composition containing a nonionic surfactant, a builder, a particular hydroxypropyl methylcellulose ether and optionally an anionic surfactant is disclosed having unusual stability, especially at low temperatures. The hydroxypropyl methylcellulose is characterized as having 28-30% methoxyl and 7-12% hydroxypropyl substitution with molecular weight from 5-250 cps nominal viscosity in 2% aqueous solution at 68° F.
Inventors
- 👤 Tamara Padron
- 👤 Ignacio Lopez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:41
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/22; C11D3/222; C11D3/225
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
91 words
An aqueous liquid detergent composition for exhibiting good freeze thaw and low temperature storage stability comprising: (i) from about 0.1% to about 1.5% hydroxypropyl methylcellulose having from 28 to 30% methoxyl and 7 to 12% hydroxypropyl substitution, the molecular weight ranging from 5 to 250 cps expressed as nominal viscosity of a 2% aqueous solution at 68° F.; (ii) from about 0.1% to about 15% of a nonionic surfactant; (iii) from about 5% to about 30% of an anionic surfactant; and (iv) from about 1% to about 30% of a builder.
Claim 2
Dependent Claim
91 words
An aqueous liquid detergent composition for exhibiting good freeze thaw and low temperature storage stability comprising: (i) from about 0.1% to about 1.5% hydroxypropyl methylcellulose having from 28 to 30% methoxyl and 7 to 12% hydroxypropyl substitution, the molecular weight ranging from 5 to 250 cps expressed as nominal viscosity of a 2% aqueous solution at 68° F.; (ii) from about 0.1% to about 15% of a nonionic surfactant; (iii) from about 5% to about 30% of an anionic surfactant; and (iv) from about 1% to about 30% of a builder.
Claim 3
Dependent Claim
21 words
A composition according to claim 1 wherein the hydroxypropyl methylcellulose has a nominal viscosity from about 112 to about 168 cps.
Claim 4
Dependent Claim
17 words
A composition according to claim 1 wherein the hydroxypropyl methylcellulose is present from about 0.2 to 0.8%.
Claim 5
Dependent Claim
27 words
A composition according to claim 1 wherein the nonionic surfactant is a C 12 to C 15 alcohol ethoxylated with from 5 to 50 moles ethylene oxide.
Claim 6
Dependent Claim
17 words
A composition according to claim 1 wherein the nonionic surfactant is present from about 2% to 10%.
Claim 7
Dependent Claim
22 words
A composition according to claim 1 wherein the anionic surfactant is an alkali metal or ammonium salt of a linear alkylbenzene sulfonate.
Claim 8
Dependent Claim
17 words
A composition according to claim 1 wherein the anionic surfactant is present from about 5 to 15%.
Claim 9
Dependent Claim
12 words
A composition according to claim 1 wherein the builder is sodium citrate.
Claim 10
Dependent Claim
15 words
A composition according to claim 1 further comprising from 1 to 10% of a hydrotrope.
Claim 11
Dependent Claim
21 words
A composition according to claim 1 wherein the hydrotrope is selected from sodium xylene sulfonate, sodium toluene sulfonate or mixtures thereof.
Claim 12
Dependent Claim
20 words
A composition according to claim 1 further comprising from about 0.01 to 1.0% of C 12 -C 20 fatty acid.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-29 | 1989-01-28 | 1989-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-29 | 1993-01-28 | 1993-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-29 | 1997-01-28 | 1997-07-30 | $7700.00 | Window Closed / Lapsed |