Patent US4264465A successfully refreshed from Google Patents.
US4264465A
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Process for the preparation of foam-controlled detergents
Assignee: BASF Corp
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Filing: 1979-03-08
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Granted: 1981-04-28
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Expires: 1999-03-08
Abstract
Abstract The present invention relates to a process for the preparation of foam-controlled pulverulent detergents. In this process (a) 80 to 99.9 parts by weight of a pulverulent, water-soluble, non-surfactant constituent of the detergent are mixed homogeneously with (b) 0.1 to 20 parts by weight of silicone oil or silicone oil/silica mixtures, which are homogeneously dispersed or dissolved in a solvent, the solvent is then removed and the residue is mixed with further constituents necessary for the preparation of a detergent. If desired, the detergent can also be treated as a whole with component (b). The process enables the detergents (washing powders) of any desired foam capacity to be prepared.
Inventors
- 👤 Heinz Abel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:31
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3703; C11D3/373; C11D3/3734; C11D11/00; C11D3/0005; C11D3/0026; C11D3/162
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
149 words
A process for the preparation of foam-controlled pulverulent detergents, which comprises homogeneously mixing (a) 80 to 99.9 parts by weight of a pulverulent, water-soluble, non-surfactant constituent of the detergent selected from the group consisting of a builder, a bleaching agent, and sodium sulfate, with (b) 0.1 to 20 parts by weight of silicone oil or silicone oil/silica mixtures, which are homogeneously dispersed or dissolved in a solvent selected from the group consisting of an aliphatic alcohol having 1 to 8 carbon atoms, a halogenated hydrocarbon having 1 or 2 carbon atoms, a ketone having 3 to 10 carbon atoms, a carboxylic acid ester having 2 to 6 carbon atoms or a substituted or unsubstituted benzene, then distilling off the solvent, the solvent having a boiling point which is below the melting point of component (a), and mixing the residue with further constituents necessary for the preparation of a detergent.
Claim 2
Dependent Claim
149 words
A process for the preparation of foam-controlled pulverulent detergents, which comprises homogeneously mixing (a) 80 to 99.9 parts by weight of a pulverulent, water-soluble, non-surfactant constituent of the detergent selected from the group consisting of a builder, a bleaching agent, and sodium sulfate, with (b) 0.1 to 20 parts by weight of silicone oil or silicone oil/silica mixtures, which are homogeneously dispersed or dissolved in a solvent selected from the group consisting of an aliphatic alcohol having 1 to 8 carbon atoms, a halogenated hydrocarbon having 1 or 2 carbon atoms, a ketone having 3 to 10 carbon atoms, a carboxylic acid ester having 2 to 6 carbon atoms or a substituted or unsubstituted benzene, then distilling off the solvent, the solvent having a boiling point which is below the melting point of component (a), and mixing the residue with further constituents necessary for the preparation of a detergent.
Claim 3
Dependent Claim
149 words
A process for the preparation of foam-controlled pulverulent detergents, which comprises homogeneously mixing (a) 80 to 99.9 parts by weight of a pulverulent, water-soluble, non-surfactant constituent of the detergent selected from the group consisting of a builder, a bleaching agent, and sodium sulfate, with (b) 0.1 to 20 parts by weight of silicone oil or silicone oil/silica mixtures, which are homogeneously dispersed or dissolved in a solvent selected from the group consisting of an aliphatic alcohol having 1 to 8 carbon atoms, a halogenated hydrocarbon having 1 or 2 carbon atoms, a ketone having 3 to 10 carbon atoms, a carboxylic acid ester having 2 to 6 carbon atoms or a substituted or unsubstituted benzene, the solvent having a boiling point which is below the melting point of component (a), and then drying the mixture and mixing the latter with further constituents necessary for the preparation of a detergent.
Claim 4
Dependent Claim
149 words
A process for the preparation of foam-controlled pulverulent detergents, which comprises homogeneously mixing (a) 80 to 99.9 parts by weight of a pulverulent, water-soluble, non-surfactant constituent of the detergent selected from the group consisting of a builder, a bleaching agent, and sodium sulfate, with (b) 0.1 to 20 parts by weight of silicone oil or silicone oil/silica mixtures, which are homogeneously dispersed or dissolved in a solvent selected from the group consisting of an aliphatic alcohol having 1 to 8 carbon atoms, a halogenated hydrocarbon having 1 or 2 carbon atoms, a ketone having 3 to 10 carbon atoms, a carboxylic acid ester having 2 to 6 carbon atoms or a substituted or unsubstituted benzene, the solvent having a boiling point which is below the melting point of component (a), and then drying the mixture and mixing the latter with further constituents necessary for the preparation of a detergent.
Claim 5
Dependent Claim
33 words
A process according to either of claims 1 or 2, wherein the amount of component (a) is 85 to 99.9 and the amount of component (b) is 0.1 to 15 parts by weight.
Claim 6
Dependent Claim
29 words
A process according to claim 3, wherein the amount of component (a) is 90 to 99.9 and the amount of component (b) is 0.1 to 10 parts by weight.
Claim 7
Dependent Claim
40 words
A process according to either of claims 1 or 2, wherein a polyalkyl-, polyaryl or polyarylalkyl-siloxane, a cycloaliphatic polysiloxane or a siloxane modified by hydroxyalkylene groups, which has a molecular weight of 1,000 to 100,000, is used as component (b).
Claim 8
Dependent Claim
34 words
A process according to claim 5, wherein a polyalkylsiloxane, in which alkyl contains 1 to 6 carbon atoms, with a viscosity at 25° C. of 1 to 15,000 centipoise is used as component (b).
Claim 9
Dependent Claim
47 words
A process according to claim 5, wherein component (b) additionally contains aliphatic, cycloaliphatic or aromatic hydrocarbons which are liquid at room temperature and under normal pressure and the proportion of which is up to 95 percent by weight, based on the siloxane or siloxane/silicon dioxide (silica)/hydrocarbon mixtures.
Claim 10
Dependent Claim
43 words
A process according to claim 5, wherein component (b) is a mixture of aliphatic, cycloaliphatic or aromatic hydrocarbons, which are liquid at room temperature and under normal pressure, colloidal silica and polyalkylsiloxanes, the weight ratios being (90 to 95):(4.75 to 9.5):(0.25 to 0.5).
Claim 11
Dependent Claim
46 words
A process according to claim 5, wherein a polyalkyl-, polyaryl or polyarylalkyl-siloxane, a cycloaliphatic polysiloxane or a siloxane modified by hydroxyalkylene groups, which has a molecular weight of 1,000 to 100,000, is used as a mixture with colloidal silica, which can be hydrophobic, as component (b).
Claim 12
Dependent Claim
25 words
A process according to claim 6, wherein a polyalkylsiloxane, with a viscosity at 25° C. of 50 to 3,000 centipose, is used as component (b).
Claim 13
Dependent Claim
17 words
A process according to claim 7, wherein the hydrocarbons contain on average 6 to 25 carbon atoms.
Claim 14
Dependent Claim
15 words
A process according to claim 11, wherein the hydrocarbons are paraffinic and/or naphthenic mineral oils.
Claim 15
Dependent Claim
24 words
A process according to claim either of claims 1 or 2, wherein the solvent has a boiling point of not more than 150° C.
Claim 16
Dependent Claim
37 words
A proces according to either of claims 1 or 2 , wherein component (a) comprises only a proportion of the non-surfactant constituent, which is treated with component (b) and is used for the preparation of the detergent.
Claim 17
Dependent Claim
34 words
A process according to claim 14, wherein the proportion of component (a) which has been treated with component (b) is present in the detergent to the extent of 0.025 to 50 percent by weight.
Claim 18
Dependent Claim
22 words
A process according to claim 15, wherein the amount of component (b) in the detergent is 0.001 to 5 percent by weight.
Claim 19
Dependent Claim
34 words
A process according to claim 15, wherein the proportion of component (a) which has been treated with component (b) is present in the detergent to the extent of 0.025 to 30 percent by weight.
Claim 20
Dependent Claim
24 words
A process according to claim 2, wherein the mixture is spray-dried and then mixed with further constituents necessary for the preparation of a detergent.
Claim 21
Dependent Claim
23 words
A process according to either of claims 1 or 2 wherein the builder is a phosphate and the bleaching agent is sodium perborate.
Claim 22
Dependent Claim
13 words
A process according to claim 19, wherein the builder is a condensed phosphate.
Claim 23
Dependent Claim
15 words
A foam-controlled pulverulent detergent prepared by the process of either of claims 1 or 2.
Claim 24
Dependent Claim
39 words
A foam-controlled pulverulent detergent according to claim 21, which contains builders, bleaching agents, modified with silicone oil or silicone oil/silica mixtures, the total amount of these modified constituents being 0.025 to 60 percent by weight, based on the detergent.
Claim 25
Dependent Claim
28 words
A foam-controlled pulverulent detergent according to claim 22, wherein the amount of silicone oil or silicone oil/silica mixture in the detergent is 0.001 to 5 percent by weight.
Claim 26
Dependent Claim
27 words
A foam-controlled pulverulent detergent according to claim 22, wherein the total amount of said modified constituents being 0.025 to 30 percent by weight, based on the detergent.
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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) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |