US4522740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyglycol ethers as foam-inhibiting additives in low-foam cleaning agents
Assignee: Henkel AG and Co KGaA
•
Filing: 1984-04-18
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Granted: 1985-06-11
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Expires: 2004-04-18
Abstract
Abstract Polyethylene glycol ethers of the type obtained by the addition of from 4 to 20 parts by weight of ethylene oxide onto 1 part by weight of polyglycerol having a hydroxyl number in the range from 900 to 1200 and subsequent etherification of the free hydroxyl groups with linear or branched alkyl halides containing from 4 to 8 carbon atoms, and their use as foam-inhibiting additives for low-foam cleaning agents.
Inventors
- 👤 Karl Schmid
- 👤 Horst Baumann
- 👤 Jurgen Geke
- 👤 Hans-Gunther Germscheid
- 👤 Werner Ludecke
- 👤 Robert Piorr
- 👤 Christian Rossmann
- 👤 Rolf Scharf
- 👤 Hans-Joachim Schlussler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:34
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3703; C11D3/3707; C11D1/00; C11D1/66; C11D1/72; C11D1/721; C11D3/0005; C11D3/0026
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
95 words
In the process of controlling undesirable foam development when subjecting surfaces of metal, glass ceramic or plastic to an aqueous washing process by addition of a foam-inhibiting substance thereto, the improvement consisting of using a foam-inhibiting amount of a polyglycerol polyethylene glycol alkyl ether of 1 part by weight of polyglycerol having a hydroxyl number in the range of from 900 to 1200 adducted with from 4 to 20 parts by weight of ethylene oxide and etherified at the free hydroxyl groups with alkyls having from 4 to 8 carbon atoms, as said foam-inhibiting substance.
Claim 2
Dependent Claim
95 words
In the process of controlling undesirable foam development when subjecting surfaces of metal, glass ceramic or plastic to an aqueous washing process by addition of a foam-inhibiting substance thereto, the improvement consisting of using a foam-inhibiting amount of a polyglycerol polyethylene glycol alkyl ether of 1 part by weight of polyglycerol having a hydroxyl number in the range of from 900 to 1200 adducted with from 4 to 20 parts by weight of ethylene oxide and etherified at the free hydroxyl groups with alkyls having from 4 to 8 carbon atoms, as said foam-inhibiting substance.
Claim 3
Dependent Claim
24 words
The process of claim 1 wherein said polyglycerol polyethylene glycol alkyl ether is present in a foam-inhibiting amount of from 10 to 2500 ppm.
Claim 4
Dependent Claim
15 words
The process of claim 2 wherein said foam-inhibiting amount of from 50 to 500 ppm.
Claim 5
Dependent Claim
110 words
A cleaning composition for use in an aqueous system comprising from 0 to 25% of at least one wetting agent, from 0 to 80% of at least one builder and complexing agent, from 0 to 80% of an alkali metal hydroxide, and from 1% to 30% of at least a polyglycerol polyethylene glycol alkyl ether of 1 part by weight of polyglycerol having a hydroxyl number in the range of from 900 to 1200 adducted with from 4 to 20 parts by weight of ethylene oxide and etherified at the free hydroxyl groups with alkyl having from 4 to 8 carbon atoms, where the total amount of ingredients is 100%.
Claim 6
Dependent Claim
110 words
A cleaning composition for use in an aqueous system comprising from 0 to 25% of at least one wetting agent, from 0 to 80% of at least one builder and complexing agent, from 0 to 80% of an alkali metal hydroxide, and from 1% to 30% of at least a polyglycerol polyethylene glycol alkyl ether of 1 part by weight of polyglycerol having a hydroxyl number in the range of from 900 to 1200 adducted with from 4 to 20 parts by weight of ethylene oxide and etherified at the free hydroxyl groups with alkyl having from 4 to 8 carbon atoms, where the total amount of ingredients is 100%.
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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) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |