US4976879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfoaroyl end-capped ester oligomers suitable as soil-release agents in detergent compositions and fabric-conditioner articles
Assignee: Procter and Gamble Co
•
Filing: 1989-08-28
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Granted: 1990-12-11
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Expires: 2009-08-28
Abstract
Abstract Anionic, especially sulfoaroyl, NaO3S(C6H4) C(O)-preferred, end-capped esters useful as soil release agents in detergent compositions and fabric-conditioner articles. The terephthalate esters contain unsymmetrically substituted oxy-1,2-alkyleneoxy units (oxy-1,2-propyleneoxy units preferred).
Inventors
- 👤 Rene Maldonado
- 👤 Toan Trinh
- 👤 Eugene P. Gosselink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:46
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3703; C11D3/3715; C11D3/0005; C11D3/0036
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
182 words
A method of laundering fabrics and concurrently providing a soil release finish thereto, comprising contacting said fabrics with an aqueous laundry liquor containing conventional detersive ingredients and from about 1 to about 50 ppm of a soil release agent which is an oligomeric or polymeric composition comprising at least 10% by weight of a substantially linear, sulfoaroyl end-capped ester having a molecular weight ranging from about 500 to about 20,000; wherein said ester consists essentially of, on a molar basis, (i) from about 1 to about 2 moles of sulfobenzoyl end-capping units of the formula (MO 3 S) (C 6 H 4 ) C(O)-- wherein M is a salt-forming cation; (ii) from about 2 to about 50 moles of oxy - 1, 2-propyleneoxy units of mixtures thereof with oxyethyleneoxy units provided that the oxy - 1, 2-propyleneoxy: oxyethyleneoxy mole ratio is in the range from about 1:10 to about 1.0; and (iii) from about 1 to about 40 moles of terephthaloyl units provided that the mole ratio of said units identified by (ii) and (iii) is from about 2:1 to about 1:24.
Claim 2
Independent Claim
182 words
A method of laundering fabrics and concurrently providing a soil release finish thereto, comprising contacting said fabrics with an aqueous laundry liquor containing conventional detersive ingredients and from about 1 to about 50 ppm of a soil release agent which is an oligomeric or polymeric composition comprising at least 10% by weight of a substantially linear, sulfoaroyl end-capped ester having a molecular weight ranging from about 500 to about 20,000; wherein said ester consists essentially of, on a molar basis, (i) from about 1 to about 2 moles of sulfobenzoyl end-capping units of the formula (MO 3 S) (C 6 H 4 ) C(O)-- wherein M is a salt-forming cation; (ii) from about 2 to about 50 moles of oxy - 1, 2-propyleneoxy units of mixtures thereof with oxyethyleneoxy units provided that the oxy - 1, 2-propyleneoxy: oxyethyleneoxy mole ratio is in the range from about 1:10 to about 1.0; and (iii) from about 1 to about 40 moles of terephthaloyl units provided that the mole ratio of said units identified by (ii) and (iii) is from about 2:1 to about 1:24.
Claim 3
Dependent Claim
105 words
A method according to claim 1 wherein said conventional detersive ingredients comprise one or more conventional anionic surfactants; said soil release agent is present at a level of from about 5 to about 30 ppm in said aqueous laundry liquor and is further characterized in that it consists essentially of the oligomeric product of reacting compounds comprising sulfobenzoic acid or a C 1 -C 4 alkyl carboxylate ester thereof as the monosodium salt, dimethyl terephthalate, and 1,2-propylene glycol; said fabrics consist essentially of polyester fabrics; and said aqueous laundry liquor is further characterized in that it has a pH from about 7 to about 11.
Claim 4
Dependent Claim
72 words
A method according to claim 2 wherein said fabrics are subjected to two or more cycles comprising the ordered sequence of steps: (a) contacting said fabrics with said aqueous laundry liquor in a conventional automatic washing-machine for periods ranging from about 5 minutes to about 1 hour; (b) rinsing said fabrics with water; (c) line- or tumble-drying said fabrics; and (d) exposing said fabrics to soiling through normal wear or domestic use.
References Cited (Backward Citations)
US3416952A
Cited
GB1161668A
Cited
US3563942A
Cited
US3546008A
Cited
US3639352A
Cited
US3734874A
Cited
US4161577A
Cited
US3712873A
Cited
US3821169A
Cited
US3853820A
Cited
US4132680A
Cited
US4156073A
Cited
US4145518A
Cited
US4116885A
Cited
CA1100262A
Cited
US4238531A
Cited
US4215026A
Cited
JPS5698230A
Cited
US4304901A
Cited
US4304900A
Cited
JPS5725326A
Cited
US4427557A
Cited
JPS5930967A
Cited
US4525524A
Cited
JPS60250028A
Cited
US4702857A
Cited
EP0185427B1
Cited
US4554328A
Cited
EP0194127A2
Cited
GB2172608A
Cited
US4759876A
Cited
EP0199403B1
Cited
JPS61275422A
Cited
US4721580A
Cited
US4738787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-10 | 1994-06-11 | 1994-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-10 | 1998-06-11 | 1998-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-10 | 2002-06-11 | 2002-12-11 | $7700.00 | Window Closed / Lapsed |