Patent US4801401A successfully refreshed from Google Patents.
US4801401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of a foam inhibitor mixture
Assignee: Henkel AG and Co KGaA
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Filing: 1987-03-06
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Granted: 1989-01-31
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Expires: 2007-03-06
Abstract
Abstract To prepare a highly effective foam inhibitor mixture consisting of paraffin hydrocarbons, hydrophobicized silica and liquid paraffin hydrocarbons, a finely divided silica is dispersed in paraffin hydrocarbons melting above 40° C. and reacted with alkyl trichlorosilanes wherein the alkyl groups contain from 4 to 22 carbon atoms.
Inventors
- 👤 Paul Schulz
- 👤 Martin Witthaus
- 👤 Juergen Waldmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:26
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
67 words
A defoaming composition of matter consisting essentially of a hydrophobicized silica dispersed in a paraffin having a melting point above about 50° C., said composition having been prepared by a method comprising reacting a hydrophilic silica dispersed in melted paraffin with an alkyl trichlorosilane wherein the alkyl group contains from about 4 to about 22 carbon atoms, and removing therefrom the hydrogen chloride formed during the reaction.
Claim 2
Dependent Claim
67 words
A defoaming composition of matter consisting essentially of a hydrophobicized silica dispersed in a paraffin having a melting point above about 50° C., said composition having been prepared by a method comprising reacting a hydrophilic silica dispersed in melted paraffin with an alkyl trichlorosilane wherein the alkyl group contains from about 4 to about 22 carbon atoms, and removing therefrom the hydrogen chloride formed during the reaction.
Claim 3
Dependent Claim
33 words
A defoaming composition of matter as in claim 1 wherein said silica is present in an amount of from about 0.5 to about 22% by weight, based on the weight of said composition.
Claim 4
Dependent Claim
28 words
A defoaming composition of matter as in claim 1 wherein from about 0.01 to about 0.3 mole of said alkyl trichlorosilane was used per mole of said silica.
Claim 5
Dependent Claim
28 words
A defoaming composition of matter as in claim 1 wherein said paraffin is selected from microparaffins and mixtures thereof with hard paraffins and/or soft paraffins and/or paraffin oils.
Claim 6
Dependent Claim
30 words
A defoaming composition of matter as in claim 21 wherein said composition has been treated with a paraffin-soluble long-chain amine to neutralize residues of chlorinated hydrocarbon formed in said composition.
Claim 7
Dependent Claim
31 words
A defoaming composition of matter as in claim 1 wherein an inert gas has been introduced into said paraffin before, during, or after the addition of said silica to said composition.
Claim 8
Dependent Claim
16 words
A defoaming composition of matter as in claim 1 mixed with a water-soluble or water-dispersible carrier.
Claim 9
Dependent Claim
20 words
A defoaming composition of matter as in claim 7 wherein said carrier is selected from an inorganic and organic material.
Claim 10
Dependent Claim
26 words
A defoaming composition of matter as in claim 1 mixed with a detergent composition in an amount effective to reduce the foaming of said detergent composition.
Claim 11
Dependent Claim
78 words
A defoaming detergent comprising: (A) a dishwashing detergent component; and (B) a defoaming composition of matter consisting essentially of a hydrophobicized silica dispersed in a paraffin having a melting point above about 50° C., said composition having been prepared by a method comprising reacting a hydrophilic silica dispersed in melted paraffin with an alkyl trichlorosilane wherein the alkyl group contains from about 4 to about 22 carbon atoms, and removing therefrom the hydrogen chloride formed during the reaction.
Claim 12
Dependent Claim
78 words
A defoaming detergent comprising: (A) a dishwashing detergent component; and (B) a defoaming composition of matter consisting essentially of a hydrophobicized silica dispersed in a paraffin having a melting point above about 50° C., said composition having been prepared by a method comprising reacting a hydrophilic silica dispersed in melted paraffin with an alkyl trichlorosilane wherein the alkyl group contains from about 4 to about 22 carbon atoms, and removing therefrom the hydrogen chloride formed during the reaction.
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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) | 1992-01-31 | 1992-08-01 | 1993-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-31 | 1996-08-01 | 1997-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-31 | 2000-08-01 | 2001-01-31 | $7700.00 | Window Closed / Lapsed |