Patent US4571303A successfully refreshed from Google Patents.
US4571303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Built nonionic detergent composition containing stabilized polyethylene terephthalate-polyoxyethylene terephthalate soil release promoting polymer
Assignee: Colgate Palmolive Co
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Filing: 1985-01-23
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Granted: 1986-02-18
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Expires: 2005-01-23
Abstract
Abstract Polyethylene terephthalate-polyoxyethylene terephthalate soil release promoting polymers, which have been found to be subject to losses of soil release promoting properties on storage in contact with alkaline materials, such as builder salts for synthetic organic detergents, are stabilized by melting them together with a water soluble polyacrylate and subsequently converting the melt to solid particles which contain the PET-POET polymer and polyacrylate in intimate contact. The stabilized PET-POET polymer may then be added to a synthetic organic detergent composition, very preferably one based on nonionic detergent, the builder(s) for which may be polyphosphate, non-phosphate or a mixture. After normal or elevated temperature aging the detergent compositions resulting are superior in soil releasing action to control compositions containing unstabilized PET-POET polymer, and are superior to control detergent compositions in which the PET-POET polymer is incorporated in a crutcher mix (for spray drying) or is sprayed onto the surfaces of detergent composition particles.
Inventors
- 👤 Loretta K. Ciallella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:21
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/66; C11D3/00; C11D3/0005; C11D3/0036; C11D3/16; C11D3/37; C11D3/3703; C11D3/3715; C11D3/3746; C11D3/3757; C11D3/3761
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
106 words
A particulate soil release promoting built synthetic organic nonionic detergent composition comprising a detersive proportion of nonionic detergent, a building proportion of alkaline builder for such nonionic detergent, a soil release promoting proportion of soil release promoting block copolymer of polyethylene terephthalate (PET) and polyoxyethylene terephthalate (POET), and a stabilizing proportion of water soluble alkali metal polyacrylate (APA), which stabilizes the PET - POET polymer against deterioration and loss of soil release properties on storage in contact with alkaline materials, such PET - POET and APA polymers being in intimate contact in solid particles, and the other components of the detergent composition being in particulate form.
Claim 2
Dependent Claim
106 words
A particulate soil release promoting built synthetic organic nonionic detergent composition comprising a detersive proportion of nonionic detergent, a building proportion of alkaline builder for such nonionic detergent, a soil release promoting proportion of soil release promoting block copolymer of polyethylene terephthalate (PET) and polyoxyethylene terephthalate (POET), and a stabilizing proportion of water soluble alkali metal polyacrylate (APA), which stabilizes the PET - POET polymer against deterioration and loss of soil release properties on storage in contact with alkaline materials, such PET - POET and APA polymers being in intimate contact in solid particles, and the other components of the detergent composition being in particulate form.
Claim 3
Dependent Claim
52 words
A particulate composition according to claim 1 wherein the stabilized PET - POET polymer, with PA polymer in intimate contact therewith, is that resulting from fusing the PET - POET and APA polymers at elevated temperature and converting the melt to solid particles which contain the PET - POET and APA polymers.
Claim 4
Dependent Claim
79 words
A composition according to claim 2 wherein the PET - POET polymer is of a molecular weight in the range of about 15,000 to 50,000, the polyoxyethylene of the POET is of a molecular weight in the range of about 1,000 to 10,000, the molar ratio of ethylene terephthalate to POET units is within the range of 2:1 to 6:1, and the APA polymer is sodium polyacrylate of a molecular weight in the range of about 1,000 to 5,000.
Claim 5
Dependent Claim
57 words
A composition according to claim 3 wherein the PET - POET polymer is of a molecular weight in the range of 19,000 to 43,000, the polyoxyethylene thereof is of a molecular weight in the range of 2,500 to 5,000, and the APA polymer is sodium polyacrylate of a molecular weight in the range of 1,000 to 3,000.
Claim 6
Dependent Claim
64 words
A composition according to claim 4 wherein the nonionic detergent is a condensation product of 3 to 30 ethylene oxide groups per mole of higher fatty alcohol, which higher fatty alcohol is of 10 to 20 carbon atoms, and the builder is selected from the group consisting of zeolites and water soluble alkaline polyphosphates, carbonates, bicarbonates, silicates, nitrilotriacetates, borates, citrates, gluconates and mixtures thereof.
Claim 7
Dependent Claim
79 words
A detergent composition according to claim 5, comprising 10 to 30% of a nonionic detergent which is the condensation product of a higher fatty alcohol of 12 to 15 carbon atoms and 6 to 12 moles of ethylene oxide, 30 to 75% of a builder or a mixture of builders, 2 to 10% of PET - POET polymer of molecular weight in the 19,000 to 25,000 range, 0.3 to 3% of sodium polyacrylate and 4 to 14% of moisture.
Claim 8
Dependent Claim
12 words
A composition according to claim 6 wherein the builder is sodium tripolyphosphate.
Claim 9
Dependent Claim
20 words
A composition according to claim 6 wherein the builder is a mixture of sodium carbonate, sodium bicarbonate and Zeolite A.
Claim 10
Dependent Claim
43 words
A composition according to claim 6 wherein the proportions of such components are 15 to 25% of nonionic detergent, 50 to 70% of builder, 2 to 6% of PET - POET polymer, 0.5 to 2% of polyacrylate and 5 to 11% of moisture.
Claim 11
Dependent Claim
13 words
A composition according to claim 7, comprising 50 to 70% of pentasodium tripolyphosphate.
Claim 12
Dependent Claim
23 words
A composition according to claim 8 comprising 10 to 30%, 10 to 25% and 15 to 40%, respectively, of the builder components thereof.
Claim 13
Dependent Claim
30 words
A composition according to claim 10 comprising about 20% of nonionic detergent, 60% of pentasodium tripolyphosphate, 4% of PET - POET polymer, 1% of sodium polyacrylate and 10% of moisture.
Claim 14
Dependent Claim
37 words
A composition according to claim 11 comprising about 20% of nonionic detergent, 26% of zeolite, 18% of sodium carbonate, 16% of sodium bicarbonate, 4% of PET - POET polymer, 1% of sodium polyacrylate and 8% of moisture.
Claim 15
Dependent Claim
34 words
A method of washing laundry and imparting soil release promoting properties to it which comprises washing such laundry in wash water containing a washing and soil release proportion of a composition of claim 1.
Claim 16
Dependent Claim
21 words
A method according to claim 14 wherein the laundry is subjected to repeated washings with the composition after intermediate soilings thereof.
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) | 1989-02-17 | 1989-08-19 | 1990-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-17 | 1993-08-19 | 1994-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-17 | 1997-08-19 | 1998-02-18 | $7700.00 | Window Closed / Lapsed |