US3962152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detergent compositions having improved soil release properties
Assignee: Procter and Gamble Co
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Filing: 1974-06-25
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Granted: 1976-06-08
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Expires: 1994-06-25
Abstract
Abstract Detergent compositions containing surface-active agents and soil release polymers comprising ethylene terephthalate and polyethylene oxide terephthalate provide improved cleaning and impart a soil release finish to synthetic fabrics treated therewith.
Inventors
- 👤 Charles Henry Nicol
- 👤 Hugh Robert Hays
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:43
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/507; C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0036; C11D3/16; C11D3/37; C11D3/3703; C11D3/3715
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
A detergent composition having improved soil release properties consisting essentially of: a. from about 2 to about 95% by weight of a member selected from the group consisting of water-soluble anionic, nonionic, zwitterionic and ampholytic surface-active agents and mixtures thereof; and b. from about 0.05 to about 25% by weight of a soil release polymer comprising ethylene terephthalate and polyethylene oxide terephthalate at a molar ratio of ethylene terephthalate to polyethylene oxide terephthalate of from about 25:75 to about 35:65, said polyethylene oxide terephthalate containing polyethylene oxide linking units having a molecular weight of from about 300 to 700, the molecular weight of said soil release polymer being in the range of from about 25,000 to about 55,000.
Claim 2
Dependent Claim
118 words
A detergent composition having improved soil release properties consisting essentially of: a. from about 2 to about 95% by weight of a member selected from the group consisting of water-soluble anionic, nonionic, zwitterionic and ampholytic surface-active agents and mixtures thereof; and b. from about 0.05 to about 25% by weight of a soil release polymer comprising ethylene terephthalate and polyethylene oxide terephthalate at a molar ratio of ethylene terephthalate to polyethylene oxide terephthalate of from about 25:75 to about 35:65, said polyethylene oxide terephthalate containing polyethylene oxide linking units having a molecular weight of from about 300 to 700, the molecular weight of said soil release polymer being in the range of from about 25,000 to about 55,000.
Claim 3
Dependent Claim
23 words
A composition according to claim 1 wherein the surface-active agent is present in an amount from about 5 to about 30% by weight.
Claim 4
Dependent Claim
24 words
A composition according to claim 1 wherein the soil release polymer is present in an amount from about 0.2 to about 10% by weight.
Claim 5
Dependent Claim
24 words
A composition according to claim 1 wherein the soil release polymer has a molecular weight in the range from about 40,000 to about 55,000.
Claim 6
Dependent Claim
93 words
A composition according to claim 1 wherein the surface-active agent is selected from the group consisting of: i. olefin sulfonates having from about 12 to about 24 carbon atoms; ii. alkylether sulfates of the general formula RO(C 2 H 4 O) x SO 3 M wherein R is alkyl or alkenyl of about 10 to avbout 20 carbon atoms, x is an integer from 1 to 30, and M is a water-soluble cation; and iii. alkali metal alkyl benzene sulfonates having from about 9 to about 20 carbon atoms in the alkyl group.
Claim 7
Dependent Claim
29 words
A composition according to claim 5 wherein the soil release polymer contains polyethylene oxide linking units having a molecular weight in the range from about 500 to about 650.
Claim 8
Dependent Claim
26 words
A composition according to claim 6 wherein the soil release polymer contains ethylene terephthalate and polyethylene oxide terephthalate units in a molar ratio of about 30:70.
Claim 9
Dependent Claim
131 words
A detergent composition according to claim 1, consisting essentially of: a. from about 5 to about 30% by weight of a member selected from the group consisting of water-soluble anionic, nonionic, zwitterionic, and ampholytic surfaceactive agents and mixtures thereof; b. from about 0.2 to about 10% by weight of a soil release polymer comprising ethylene terephthalate and polyethylene oxide terephthalate at a molar ratio of ethylene terephthalate to polyethylene oxide terephthalate of from about 25:75 to about 35:65, said polyethylene oxide terephthalate containing polyethylene oxide linking units having a molecular weight of from about 300 to about 700, the molecular weight of said soil release polymer being in the range of from about 25,000 to about 55,000; and c. from about 20 to about 70% by weight of a detergency builder.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |