US4476038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for preventing or eliminating foam, especially in aqueous systems
Assignee: Evonik Operations GmbH
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Filing: 1982-12-10
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Granted: 1984-10-09
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Expires: 2002-12-10
Abstract
Abstract The invention relates to a defoaming agent. The active compounds having the formula ##STR1## wherein z=a whole number from 1 to 3; R 1 =a hydrocarbon radical having a functionality of z, and when z is l, a hydrogen radical; R 2 =hydrogen, alkyl, aryl, --CONHR 3 , ##STR2## or a --SiR 3 3 radical, in which at most 100/z % of all R 2 radicals may be hydrogen radicals; R 3 =a monofunctional hydrocarbon radical; R 4 =a linear alkyl radical with an average of 4 to 16 carbon atoms, a methyl, or hydrogen radical, in which case, however, no more than 90 mole percent of the R 4 radicals may be methyl or hydrogen radicals; and n=is a whole number not less than 2.
Inventors
- 👤 Jurgen Fock
- 👤 Hans-Ferdi Fink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:21
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
135 words
A defoaming composition which comprises a defoaming effective amount of a water insoluble compound having the formula ##STR9## wherein z=a whole number from 1 to 3; R 1 =a hydrocarbon radical having a functionality of z, and when z is 1, a hydrogen radical; R 2 =hydrogen, alkyl, aryl, --CONHR 3 , ##STR10## or a --SiR 3 3 radical, in which at most (100 /z)% of all R 2 radicals may be hydrogen radicals; R 3 =a monofunctional hydrocarbon radical; R 4 =a linear alkyl radical with an average of 4 to 16 carbon atoms, or methyl, in which case, however, no more than 90 mole percent of the R 4 radicals are methyl; and n=is a whole number not less than 2, said compound being dissolved or dispersed in an organic solvent or diluent.
Claim 2
Dependent Claim
135 words
A defoaming composition which comprises a defoaming effective amount of a water insoluble compound having the formula ##STR9## wherein z=a whole number from 1 to 3; R 1 =a hydrocarbon radical having a functionality of z, and when z is 1, a hydrogen radical; R 2 =hydrogen, alkyl, aryl, --CONHR 3 , ##STR10## or a --SiR 3 3 radical, in which at most (100 /z)% of all R 2 radicals may be hydrogen radicals; R 3 =a monofunctional hydrocarbon radical; R 4 =a linear alkyl radical with an average of 4 to 16 carbon atoms, or methyl, in which case, however, no more than 90 mole percent of the R 4 radicals are methyl; and n=is a whole number not less than 2, said compound being dissolved or dispersed in an organic solvent or diluent.
Claim 3
Dependent Claim
9 words
The composition of claim 1 which further contains water.
Claim 4
Dependent Claim
11 words
The composition of claim 1 which further contains finely particulate silica.
Claim 5
Dependent Claim
10 words
The composition of claim 3 wherein the silica is hydrophobized.
Claim 6
Dependent Claim
30 words
The composition of claim 1, 2 or 3, wherein at least 50% of the R 4 radicals are linear alkyl radicals with an average of 4 to 12 carbon atoms.
Claim 7
Dependent Claim
30 words
The composition of claim 1, 2 or 3, wherein at least 50% of the R 4 radicals are linear alkyl radicals with an average of 8 to 12 carbon atoms.
Claim 8
Dependent Claim
14 words
The composition of claim 1, 2 or 3, wherein z is 1 or 2.
Claim 9
Dependent Claim
22 words
The composition of claim 1, 2 or 3, wherein R 1 is a z-functional alkyl radical with up to 6 carbon atoms.
Claim 10
Dependent Claim
25 words
The composition of claim 1, 2 or 3, wherein z is 1 and R 1 is an alkyl radical with 1 to 3 carbon atoms.
Claim 11
Dependent Claim
24 words
The composition of claim 1, 2 or 3, wherein finely particulate silica is present in an amount equal to the weight of the compound.
Claim 12
Dependent Claim
116 words
A water insoluble compound having defoaming properties having the formula ##STR11## wherein z=a whole number from 1 to 3; R 1 =a hydrocarbon radical having a functionality of z, and when z is 1, a hydrogen radical; R 2 =hydrogen, alkyl, aryl, --CONHR 3 , ##STR12## or a --SiR 3 3 radical, in which at most (100/z)% of all R 2 radicals may be hydrogen radicals; R 3 =a monofunctional hydrocarbon radical; R 4 =a linear alkyl radical with an average of 4 to 16 carbon atoms, or methyl, in which case, however, no more than 90 mole percent of the R 4 radicals may be methyl; and n=is a whole number not less than 2.
Claim 13
Dependent Claim
116 words
A water insoluble compound having defoaming properties having the formula ##STR11## wherein z=a whole number from 1 to 3; R 1 =a hydrocarbon radical having a functionality of z, and when z is 1, a hydrogen radical; R 2 =hydrogen, alkyl, aryl, --CONHR 3 , ##STR12## or a --SiR 3 3 radical, in which at most (100/z)% of all R 2 radicals may be hydrogen radicals; R 3 =a monofunctional hydrocarbon radical; R 4 =a linear alkyl radical with an average of 4 to 16 carbon atoms, or methyl, in which case, however, no more than 90 mole percent of the R 4 radicals may be methyl; and n=is a whole number not less than 2.
Claim 14
Dependent Claim
27 words
The compound of claim 11 wherein at least 50% of the R 4 radicals are linear alkyl radicals with an average of 4 to 12 carbon atoms.
Claim 15
Dependent Claim
27 words
The compound of claim 11 wherein at least 50% of the R 4 radicals are linear alkyl radicals with an average of 8 to 12 carbon atoms.
Claim 16
Dependent Claim
11 words
The compound of claim 11 wherein z is 1 or 2.
Claim 17
Dependent Claim
19 words
The compound of claim 11 wherein R 1 is a z-functional alkyl radical with up to 5 carbon atoms.
Claim 18
Dependent Claim
20 words
The compound of claim 11 wherein z=1 and R 1 is an alkyl radical with 1 to 3 carbon atoms.
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) | 1987-10-09 | 1988-04-09 | 1988-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-09 | 1992-04-09 | 1992-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-09 | 1996-04-09 | 1996-10-09 | $7700.00 | Window Closed / Lapsed |