US3846358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing silicone resins
Assignee: General Electric Co
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Filing: 1973-09-20
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Granted: 1974-11-05
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Expires: 1993-09-20
Abstract
Abstract A process for producing a silicone resin comprised of trifunctional and difunctional units comprising partially hydrolyzing and alkoxylating an organohalosilane mixture with an alcohol and water such that the alkoxylated product contains from 5 to 40 percent by weight of alkoxy groups; adding additional alcohol to the alkoxylated product and removing acid by distillation procedures; adjusting the acidity of the alkoxylated organohalosiloxane intermediate such that it contains 1 to 300 parts per million of acid; adding additional water and alcohol so as to hydrolyze the alkoxylated organohalosiloxane and adjusting the resulting hydrolyzate which is the desired silicone resin to the desired solids content.
Inventors
- 👤 G Roedel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:17
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
76 words
A PROCESS FOR PRODUCING A SILICONE RESIN COMPRISING (A) CONTACTING AN ORGANOLHALOSILANE SELECTED FROM THE CLASS CONSISTING OF ORGANOTRIHALOSILANES AND DIORGANODIHALOSILANES AND MIXTURES THEREOF, WHERE THE ORGANO GROUP IS SELECTED FROM THE CLASS CONSISTING OF MONOVALENT HYDROCARBON RADICALS AND HALOGENATED MONOVALENT HYDROCARBON RADICALS, WITH FROM 0.05 TO 1 PART OF WATER BASED ON PER PART OF ORGANOHALOSILANE WITH FROM 0.1 TO 1 PART OF AN ALCOHOL BASED ON PER PART OF SAID ORGANOHALOSILANE OF THE FORMULA,
Claim 2
Dependent Claim
76 words
A PROCESS FOR PRODUCING A SILICONE RESIN COMPRISING (A) CONTACTING AN ORGANOLHALOSILANE SELECTED FROM THE CLASS CONSISTING OF ORGANOTRIHALOSILANES AND DIORGANODIHALOSILANES AND MIXTURES THEREOF, WHERE THE ORGANO GROUP IS SELECTED FROM THE CLASS CONSISTING OF MONOVALENT HYDROCARBON RADICALS AND HALOGENATED MONOVALENT HYDROCARBON RADICALS, WITH FROM 0.05 TO 1 PART OF WATER BASED ON PER PART OF ORGANOHALOSILANE WITH FROM 0.1 TO 1 PART OF AN ALCOHOL BASED ON PER PART OF SAID ORGANOHALOSILANE OF THE FORMULA,
Claim 3
Dependent Claim
42 words
The process of claim 1 wherein in step (a) there is added 0.05 to 0.2 parts of water and 0.1 to 0.4 parts of the alcohol to one part of the organohalosilane and wherein the addition is carried out at room temperature.
Claim 4
Dependent Claim
33 words
The process of claim 1 wherein in step (b) 0.04 to 0.1 parts of alcohol are added per part of the alkoxylated organohalosiloxane and wherein said acid is removed by distillation under vacuum.
Claim 5
Dependent Claim
26 words
The process of claim 1 wherein in step (c) the acidity is adjusted by adding a base selected from the class consisting of KOH and NaOH.
Claim 6
Dependent Claim
44 words
The process of claim 1 wherein in step (d) there is added an alcohol at a concentration of 0.05 to 0.20 parts of the alcohol per part of the alkoxylated organohalosiloxane and 0.04 to 0.20 parts of water per part of said alkoxylated organosiloxane.
Claim 7
Dependent Claim
43 words
The process of claim 1 wherein in step (e) the hydrolyzate is heated to a temperature in the range of 60* to 100*C to remove all water and as much alcohol as is necessary to adjust the hydrolyzate to the desired solids content.
Claim 8
Dependent Claim
24 words
The process of claim 1 wherein the organo group is selected from the class consisting of methyl, vinyl and phenyl and R'' is methyl.
Claim 9
Dependent Claim
42 words
A resin produced by the process of claim 1 which has an organo group to Si ratio of 1:1 to 1.9:1, a hydroxyl content of 1.5 to 8.0 percent by weight and an alkoxy content of 0.2 to 4.0 percent by weight.
Claim 10
Dependent Claim
46 words
The process of claim 1 further comprising adding a solvent selected from the class consisting of toluene, xylene, benzene and cyclohexane to said hydrolyzate and azeptroping out water and solvent at a temperature in the range of 80* to 130*C until the desired product is obtained.
Claim 11
Dependent Claim
81 words
The process of claim 9 further comprising adjusting the hydrolyzate to a concentration of 85 to 90 percent solids by distillation; adding 0.005 to 0.04 percent by weight of the hydrolyzate of a metal soap selected from the class consisting of manganese octoate, cobalt octoate, iron octoate, and zinc octoate; heating to reflux at a temperature of 150*C to 170*C for 2 to 20 hours until a resin product having 0.1 to 1.5 percent by weight of hydroxyl content is obtained.
Claim 12
Dependent Claim
47 words
The process of claim 10 further comprising adding a solvent to the resin selected from the class consisting of xylene, toluene, benzene, butyl acetate, naphtha solvents and mineral spirits and cyclohexane to adjust the resin solution to the proper solids concentration and filtering impurities from the solution.
References Cited (Backward Citations)
US3668180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |