US4780237A
Expired / Lapsed
US
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Low foam surfactant mixtures
Assignee: Ecolab USA Inc
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Filing: 1987-07-24
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Granted: 1988-10-25
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Expires: 2007-07-24
Abstract
Abstract Low-foam or foam-depressing surfactant mixtures based on water-soluble and/or water-emulsifiable polyalkylene glycol ethers of relatively long-chain alcohols containing components I, II and, if desired, III in the quantities indicated: (I) from 20 to 80% by weight of polyethylene glycol ethers corresponding to the following general formula R1-O-(CH2CH2O)n-R2 (I) in which R1 is a straight-chain or branched C8-C18 alkyl or alkenyl radical, R2 is a C4-C8 alkyl radical and n is a number of from 3 to 7, (II) from 10 to 40% by weight of alkyl polyalkylene glycol mixed ethers corresponding to the following general formula <IMAGE> (II) in which R3 is a straight-chain or branched C8-C18 alkyl radical, x is a number of from 1 to 3 and y is a number of from 3 to 6, and (III) from 0 to 40% by weight of alkyl (poly)propylene glycol ethers corresponding to the following general formula <IMAGE> (III) in which R4 is a straight-chain or branched C16-C22 alkyl or alkenyl radical and z is a number of from 1 to 3.
Inventors
- 👤 Karl-Heinz Schmid
- 👤 Adolf Asbeck
- 👤 Detlev Stanislowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:58
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/66; C11D1/825; C11D1/8255; C11D1/72; C11D1/721; C11D3/00; C11D3/0005; C11D3/0026; C11D1/722
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
174 words
A low-foam or foam-depressing surfactant mixture comprising: (I) from about 33 to about 80% by weight of at least one polyalkylene glycol ether of the formula R.sub.1 --O--(CH.sub.2 CH.sub.2 O).sub.n --R.sub.2 (I) in which R 1 is a straight-chain or branched C 8 -C 18 alkyl or alkenyl radical, R 2 is a C 4 -C 8 alkyl radical and n is a number of from 5 to 7, (II) from about 10 to about 40% by weight of at least one alkyl polyalkylene glycol mixed ether of the formula ##STR5## in which R 3 is a straight-chain or branched C 8 -C 18 alkyl radical, x is a number of from 1 to 3 and y is a number of from 3 to 5, and (III) from about 0 to about 40% by weight of at least one alkyl (poly)propylene glycol ether of the formula ##STR6## in which R 4 is a straight-chain or branched C 16 -C 22 alkyl or alkenyl radical and z is a number of from 1 to 3.
Claim 2
Dependent Claim
174 words
A low-foam or foam-depressing surfactant mixture comprising: (I) from about 33 to about 80% by weight of at least one polyalkylene glycol ether of the formula R.sub.1 --O--(CH.sub.2 CH.sub.2 O).sub.n --R.sub.2 (I) in which R 1 is a straight-chain or branched C 8 -C 18 alkyl or alkenyl radical, R 2 is a C 4 -C 8 alkyl radical and n is a number of from 5 to 7, (II) from about 10 to about 40% by weight of at least one alkyl polyalkylene glycol mixed ether of the formula ##STR5## in which R 3 is a straight-chain or branched C 8 -C 18 alkyl radical, x is a number of from 1 to 3 and y is a number of from 3 to 5, and (III) from about 0 to about 40% by weight of at least one alkyl (poly)propylene glycol ether of the formula ##STR6## in which R 4 is a straight-chain or branched C 16 -C 22 alkyl or alkenyl radical and z is a number of from 1 to 3.
Claim 3
Dependent Claim
40 words
The surfactant mixture of claim 1, wherein components I to III are present in the following quantities: I--from about 50 to about 80% by weight II--from about 10 to about 30% by weight III--from 0 to about 20% by weight.
Claim 4
Dependent Claim
19 words
The surfactant mixture of claim 1 wherein in component I, R 1 contains from 12 to 18 carbon atoms.
Claim 5
Dependent Claim
14 words
The surfactant mixture of claim 1 wherein in component I, R 2 is butyl.
Claim 6
Dependent Claim
14 words
The surfactant mixture of claim 3 wherein in component I, R 2 is butyl.
Claim 7
Dependent Claim
19 words
The surfactant mixture of claim 1 wherein in component II, R 3 contains from 12 to 14 carbon atoms.
Claim 8
Dependent Claim
19 words
The surfactant mixture of claim 1 wherein in component III, R 4 contains from 16 to 18 carbon atoms.
Claim 9
Dependent Claim
19 words
The surfactant mixture of claim 6 wherein in component III, R 4 contains from 16 to 18 carbon atoms.
Claim 10
Dependent Claim
47 words
The surfactant mixture of claim 1 wherein in component I, R 1 contains from 12 to 18 carbon atoms and R 2 is butyl, and in component II, R 3 contains from 12 to 14 carbon atoms and R 4 contains from 16 to 18 carbon atoms.
Claim 11
Dependent Claim
26 words
In an aqueous cleaning preparation, the improvement comprising the presence therein of from about 10 to about 2500 ppm of the surfactant mixture of claim 1.
Claim 12
Dependent Claim
25 words
The aqueous cleaning preparation of claim 10 wherein from about 50 to about 500 ppm of the surfactant mixture of claim 1 is present therein.
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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) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |