US4686065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Caustic based cleaning composition containing THFA and a propoxylated alcohol or phenol
Assignee: Clorox Co
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Filing: 1986-05-23
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Granted: 1987-08-11
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Expires: 2006-05-23
Abstract
Abstract Disclosed is a cleaning composition for removing baked on soils from hard surfaces. The composition comprises an alkali metal hydroxide, and a solvent system made up of tetrahydrofurfuryl alcohol together with a propoxylated alcohol or phenol and a thickener to provide a composition having a suitable viscosity for its intended use.
Inventors
- 👤 Kenneth E. Bliznik
- 👤 Gilles M. L. Verboom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:00
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/02; C11D7/04; C11D7/06; C11D3/00; C11D3/0005; C11D3/0057; C11D7/50; C11D7/5004; C11D7/5022
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
168 words
A composition for removing cooking deposits from surfaces soiled with such deposits which comprises on a weight/weight basis as a percentage of the entire composition: (a) from 7 to 10 percent of an alkali metal hydroxide; (b) a solvent system for the alkali metal hydroxide which comprises: i. from 2 to 20 percent of tetrahydrofurfuryl alcohol, and ii. from 1 to 10 percent of one or more propoxylated alcohols or phenols of the formula: R--O--CH.sub.2 CH(CH.sub.3)O--.sub.n H wherein R is phenyl or a straight chain alkyl of 1 to 4 carbon atoms and n is 1-3 in which the weight ratio of tetrahydrofurfuryl alcohol to propoxylated alcohol is about 2:1, (c) an alkali compatible thickener which when present in adequate quantity, will cause the composition to have a resting viscosity of from about 1,000 to about 5,000 centipoise at room temperature, said composition being further defined in that the weight ratio of alkali metal hydroxide to the solvent system is about 1:2, and (d) the balance is water.
Claim 2
Dependent Claim
168 words
A composition for removing cooking deposits from surfaces soiled with such deposits which comprises on a weight/weight basis as a percentage of the entire composition: (a) from 7 to 10 percent of an alkali metal hydroxide; (b) a solvent system for the alkali metal hydroxide which comprises: i. from 2 to 20 percent of tetrahydrofurfuryl alcohol, and ii. from 1 to 10 percent of one or more propoxylated alcohols or phenols of the formula: R--O--CH.sub.2 CH(CH.sub.3)O--.sub.n H wherein R is phenyl or a straight chain alkyl of 1 to 4 carbon atoms and n is 1-3 in which the weight ratio of tetrahydrofurfuryl alcohol to propoxylated alcohol is about 2:1, (c) an alkali compatible thickener which when present in adequate quantity, will cause the composition to have a resting viscosity of from about 1,000 to about 5,000 centipoise at room temperature, said composition being further defined in that the weight ratio of alkali metal hydroxide to the solvent system is about 1:2, and (d) the balance is water.
Claim 3
Dependent Claim
15 words
The composition of claim 1 wherein the viscosity is from about 2500 to 3600 centipoise.
Claim 4
Dependent Claim
13 words
The composition of claim 1 wherein the thickener is colloidal magnesium aluminum silicate.
Claim 5
Dependent Claim
10 words
The composition of claim 1 which contains an opacifying pigment.
Claim 6
Dependent Claim
14 words
The composition of claim 1 wherein the propoxylated alcohol is dipropylene glycol methyl ether.
Claim 7
Dependent Claim
36 words
The composition of claim 1 wherein the solvent system comprises from 10 to 16 percent tetrahydrofurfuryl alcohol and from 5 to 8% of the propoxylated alcohol and wherein the composition is substantially free of furfuryl alcohol.
Claim 8
Dependent Claim
121 words
A caustic based cleaning composition for removing baked on soil from oven surfaces which comprises on a weight/weight basis as a percentage of the entire composition: (a) from 7 to 10 percent of sodium hydroxide; (b) from 8 to 20 percent of a solvent system for the alkali metal hydroxide which comprises: i. from 10 to 16 percent of tetrahydrofurfuryl alcohol (THFA,) and ii. from 5 to 8 percent propylene glycol methyl ether wherein the weight ratios of THFA to propylene glycol methyl ether and solvent system to sodium hydroxide about 2:1, and (c) a sodium hydroxide compatible thickener in sufficient amount to cause the composition to have a resting viscosity of from about 1,000 to 5,000 centipoise at room temperature.
Claim 9
Dependent Claim
121 words
A caustic based cleaning composition for removing baked on soil from oven surfaces which comprises on a weight/weight basis as a percentage of the entire composition: (a) from 7 to 10 percent of sodium hydroxide; (b) from 8 to 20 percent of a solvent system for the alkali metal hydroxide which comprises: i. from 10 to 16 percent of tetrahydrofurfuryl alcohol (THFA,) and ii. from 5 to 8 percent propylene glycol methyl ether wherein the weight ratios of THFA to propylene glycol methyl ether and solvent system to sodium hydroxide about 2:1, and (c) a sodium hydroxide compatible thickener in sufficient amount to cause the composition to have a resting viscosity of from about 1,000 to 5,000 centipoise at room temperature.
Claim 10
Dependent Claim
13 words
The composition of claim 7 wherein the thickener is colloidal magnesium aluminum silicate.
Claim 11
Dependent Claim
14 words
The composition of claim 8 wherein the viscosity is from about 2,500 to 3,600.
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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) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |