US5049636A
Expired / Lapsed
US
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Organosols of organopolysiloxanes and a process for preparing the same
Assignee: Wacker Chemie AG
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Filing: 1989-03-30
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Granted: 1991-09-17
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Expires: 2009-03-30
Abstract
Abstract Organosols of organopolysiloxanes are prepared by adding water-soluble organic solvents or mixtures thereof or water-soluble mixtures of water-soluble and water-insoluble organic solvents to aqueous, colloidal suspensions of organopolysiloxanes obtained by adding at least one alkoxysilane and/or the partial hydrolyzate thereof, and, if appropriate, mixed with an organo(poly)siloxane free of alkoxy groups and having a maximum of 8 siloxane units per molecule, to water in the presence of emulsifiers at a maximum rate of 5 moles of organosilicon compound per hour and per liter of water, and subsequently removing the water by distillation.
Inventors
- 👤 Matthias Wolfgruber
- 👤 Bernward Deubzer
- 👤 Volker Frey
- 👤 Helmut Oswaldbauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:11
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08G; C08G77/00; C08G77/04; C08G77/06; C08J2383/00; C08J2383/04
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
82 words
Organosols of organopolysiloxanes are prepared by adding water-soluble organic solvents or mixtures thereof or water-soluble mixtures of water-soluble and water-insoluble organic solvents to aqueous colloidal suspensions of organopolysiloxanes which have been obtained by adding an organosilicon compound selected from the group consisting of an alkoxysilane, partial hydrolyzates thereof and mixtures thereof to water in the presence of emulsifiers at a maximum rate of 5 moles of organosilicon compound per hour per liter of water, and thereafter the water is removed by distillation.
Claim 2
Dependent Claim
82 words
Organosols of organopolysiloxanes are prepared by adding water-soluble organic solvents or mixtures thereof or water-soluble mixtures of water-soluble and water-insoluble organic solvents to aqueous colloidal suspensions of organopolysiloxanes which have been obtained by adding an organosilicon compound selected from the group consisting of an alkoxysilane, partial hydrolyzates thereof and mixtures thereof to water in the presence of emulsifiers at a maximum rate of 5 moles of organosilicon compound per hour per liter of water, and thereafter the water is removed by distillation.
Claim 3
Dependent Claim
36 words
The organosols of claim 1, wherein the aqueous colloidal suspensions of organopolysiloxanes are obtained by adding an organo(poly)siloxane free of alkoxy groups which has a maximum of 8 siloxane units per molecule to the organosilicon compound.
Claim 4
Dependent Claim
133 words
The organosols of claim 1, wherein the aqueous colloidal suspensions of organopolysiloxanes which are solid at room temperature have units of the formula ##STR3## in which R is selected from the group consisting of a hydrogen atom, a monovalent hydrocarbon radical having from 1 to 8 carbon atoms per radical, and a substituted monovalent hydrocarbon radical in which the substituent is inert to water, R 1 is selected from the group consisting of a hydrogen atom, an alkyl radical and an alkoxyalkylene radical having 1 to 4 carbon atoms per radical, with the proviso that the organopolysiloxanes are insoluble in the organic solvents, x is 0, 1, 2 or 3, with an average of from 1.0 to 2.0, and y is 0, 1 or 2, with an average of from 0.0 to 0.5.
Claim 5
Dependent Claim
133 words
The organosols of claim 2, wherein the aqueous colloidal suspensions of organopolysiloxanes which are solid at room temperature have units of the formula ##STR4## in which R is selected from the group consisting of a hydrogen atom, a monovalent hydrocarbon radical having from 1 to 8 carbon atoms per radical, and a substituted monovalent hydrocarbon radical in which the substituent is inert to water, R 1 is selected from the group consisting of a hydrogen atom, an alkyl radical and an alkoxyalkylene radical having 1 to 4 carbon atoms per radical, with the proviso that the organopolysiloxanes are insoluble in the organic solvents, x is 0, 1, 2 or 3, with an average of from 1.0 to 2.0, and y is 0, 1 or 2, with an average of from 0.0 to 0.5.
Claim 6
Dependent Claim
46 words
The organosols of claim 1, wherein the water-soluble organic solvents or mixtures thereof or water-soluble mixtures of water-soluble and water-insoluble organic solvents are added in an amount of at least 50 percent by weight, based on the total weight of the colloidal aqueous suspension of organopolysiloxanes.
Claim 7
Dependent Claim
46 words
The organosols of claim 2, wherein the water-soluble organic solvents or mixtures thereof or water-soluble mixtures of water-soluble and water-insoluble organic solvents are added in an amount of at least 50 percent by weight, based on the total weight of the colloidal aqueous suspension of organopolysiloxanes.
Claim 8
Dependent Claim
31 words
The organosols of claim 1, wherein the water-soluble organic solvents are selected from the group consisting of lower alkanols, alkoxyalkanols, ethylene glycols having 1 to 6 ethoxy units, acetone and tetrahydrofuran.
Claim 9
Dependent Claim
31 words
The organosols of claim 2, wherein the water-soluble organic solvents are selected from the group consisting of lower alkanols, alkoxyalkanols, ethylene glycols having 1 to 6 ethoxy units, acetone and tetrahydrofuran.
Claim 10
Dependent Claim
31 words
The organosols of claim 3, wherein the water-soluble organic solvents are selected from the group consisting of lower alkanols, alkoxyalkanols, ethylene glycols having 1 to 6 ethoxy units, acetone and tetrahydrofuran.
Claim 11
Dependent Claim
31 words
The organosols of claim 4, wherein the water-soluble organic solvents are selected from the group consisting of lower alkanols, alkoxyalkanols, ethylene glycols having 1 to 6 ethoxy units, acetone and tetrahydrofuran.
Claim 12
Dependent Claim
50 words
The organosols of claim 1, wherein the water-soluble organic solvents are selected from the group consisting of polyethylene glycols which are liquid or solid at room temperature and block copolymers which are solid at room temperature consisting of polyethylene glycols and polypropylene glycols having a high content of polyoxyethylene units.
Claim 13
Dependent Claim
50 words
The organosols of claim 2, wherein the water-soluble organic solvents are selected from the group consisting of polyethylene glycols which are liquid or solid at room temperature and block copolymers which are solid at room temperature consisting of polyethylene glycols and polypropylene glycols having a high content of polyoxyethylene units.
Claim 14
Dependent Claim
50 words
The organosols of claim 3, wherein the water-soluble organic solvents are selected from the group consisting of polyethylene glycols which are liquid or solid at room temperature and block copolymers which are solid at room temperature consisting of polyethylene glycols and polypropylene glycols having a high content of polyoxyethylene units.
Claim 15
Dependent Claim
50 words
The organosols of claim 4, wherein the water-soluble organic solvents are selected from the group consisting of polyethylene glycols which are liquid or solid at room temperature and block copolymers which are solid at room temperature consisting of polyethylene glycols and polypropylene glycols having a high content of polyoxyethylene units.
Claim 16
Dependent Claim
50 words
The organosols of claim 5, wherein the water-soluble organic solvents are selected from the group consisting of polyethylene glycols which are liquid or solid at room temperature and block copolymers which are solid at room temperature consisting of polyethylene glycols and polypropylene glycols having a high content of polyoxyethylene units.
Claim 17
Dependent Claim
50 words
The organosols of claim 6, wherein the water-soluble organic solvents are selected from the group consisting of polyethylene glycols which are liquid or solid at room temperature and block copolymers which are solid at room temperature consisting of polyethylene glycols and polypropylene glycols having a high content of polyoxyethylene units.
Claim 18
Dependent Claim
27 words
The organosols of claim 1, wherein water-insoluble organic solvents are used which are selected from the group consisting of cyclohexanone, methyl isobutyl ketone and methacrylic acid esters.
Claim 19
Dependent Claim
27 words
The organosols of claim 2, wherein water-insoluble organic solvents are used which are selected from the group consisting of cyclohexanone, methyl isobutyl ketone and methacrylic acid esters.
Claim 20
Dependent Claim
54 words
The organosols of claim 1, wherein water-insoluble organic solvents are used which are selected from the group consisting of higher alkanols having from 8 to 18 carbon atoms, polypropylene glycols which are solid at room temperature and alkylacetates having from C 6 - to C 13 -alkyl radicals which are solid at room temperature.
Claim 21
Dependent Claim
54 words
The organosols of claim 2, wherein water-insoluble organic solvents are used which are selected from the group consisting of higher alkanols having from 8 to 18 carbon atoms, polypropylene glycols which are solid at room temperature and alkylacetates having from C 6 - to C 13 -alkyl radicals which are solid at room temperature.
Claim 22
Dependent Claim
99 words
A process for preparing organosols of organopolysiloxanes which comprises adding water-soluble organic solvents or mixtures thereof or water-soluble mixtures of water-soluble and water-insoluble organic solvents to aqueous colloidal suspensions of organopolysiloxanes, in which the organopolysiloxanes are solid at room temperature and thereafter removing the water by distillation, in which the aqueous colloidal suspensions of organopolysiloxanes are obtained by adding an organosilicon compound selected from the group consisting of an alkoxysilane, partial hydrolyzates thereof and mixtures thereof to water in the presence of emulsifiers at a maximum rate of 5 mols or organosilicon compound per hour per liter of water.
Claim 23
Dependent Claim
99 words
A process for preparing organosols of organopolysiloxanes which comprises adding water-soluble organic solvents or mixtures thereof or water-soluble mixtures of water-soluble and water-insoluble organic solvents to aqueous colloidal suspensions of organopolysiloxanes, in which the organopolysiloxanes are solid at room temperature and thereafter removing the water by distillation, in which the aqueous colloidal suspensions of organopolysiloxanes are obtained by adding an organosilicon compound selected from the group consisting of an alkoxysilane, partial hydrolyzates thereof and mixtures thereof to water in the presence of emulsifiers at a maximum rate of 5 mols or organosilicon compound per hour per liter of water.
Claim 24
Dependent Claim
28 words
The process of claim 21, wherein an organo(poly)siloxane free of alkoxy groups which has a maximum of 8 siloxane units per molecule is added to the organosilicon compound.
Claim 25
Dependent Claim
46 words
The process of claim 21, wherein the water-soluble organic solvents or mixtures thereof or water-soluble mixtures of water-soluble and water-insoluble organic solvents are added in an amount of at least 50 percent by weight, based on the total weight of the colloidal aqueous suspension of organopolysiloxanes.
Claim 26
Dependent Claim
46 words
The process of claim 22, wherein the water-soluble organic solvents or mixtures thereof or water-soluble mixtures of water-soluble and water-insoluble organic solvents are added in an amount of at least 50 percent by weight, based on the total weight of the colloidal aqueous suspension of organopolysiloxanes.
Claim 27
Dependent Claim
31 words
The process of claim 21, wherein the water-soluble organic solvents are selected from the group consisting of lower alkanols, alkoxyalkanols, ethylene glycols having 1 to 6 ethoxy units, acetone and tetrahydrofuran.
Claim 28
Dependent Claim
31 words
The process of claim 22, wherein the water-soluble organic solvents are selected from the group consisting of lower alkanols, alkoxyalkanols, ethylene glycols having 1 to 6 ethoxy units, acetone and tetrahydrofuran.
Claim 29
Dependent Claim
50 words
The process of claim 21, wherein the water-soluble organic solvents are selected from the group consisting of polyethylene glycols which are liquid or solid at room temperature and block copolymers which are solid at room temperature consisting of polyethylene glycols and polypropylene glycols having a high content of polyoxyethylene units.
Claim 30
Dependent Claim
50 words
The process of claim 22, wherein the water-soluble organic solvents are selected from the group consisting of polyethylene glycols which are liquid or solid at room temperature and block copolymers which are solid at room temperature consisting of polyethylene glycols and polypropylene glycols having a high content of polyoxyethylene units.
Claim 31
Dependent Claim
27 words
The process of claim 21, wherein water-insoluble organic solvents are used which are selected from the group consisting of cyclohexane, methyl isobutyl ketone and methacrylic acid esters.
Claim 32
Dependent Claim
27 words
The process of claim 22, wherein water-insoluble organic solvents are used which are selected from the group consisting of cyclohexane, methyl isobutyl ketone and methacrylic acid esters.
Claim 33
Dependent Claim
54 words
The process of claim 21, wherein water-insoluble organic solvents are used which are selected from the group consisting of higher alkanols having from 8 to 18 carbon atoms, polypropylene glycols which are solid at room temperature and alkylacetates having from C 6 - to C 13 -alkyl radicals which are solid at room temperature.
Claim 34
Dependent Claim
54 words
The process of claim 22, wherein water-insoluble organic solvents are used which are selected from the group consisting of higher alkanols having from 8 to 18 carbon atoms, polypropylene glycols which are solid at room temperature and alkylacetates having from C 6 - to C 13 -alkyl radicals which are solid at room temperature.
References Cited (Backward Citations)
US3433780A
Cited
US4424297A
Cited
US4644077A
Cited
US4814017A
Cited
US4857582A
Cited
US4806665A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1994-09-16 | 1995-03-18 | 1995-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-16 | 1999-03-18 | 1999-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-16 | 2003-03-18 | 2003-09-17 | $7700.00 | Window Closed / Lapsed |