US4368294A
Expired / Lapsed
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Process for preparing organopolysiloxane modified organic polymers
Assignee: Wacker Chemie AG
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Filing: 1981-02-27
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Granted: 1983-01-11
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Expires: 2001-02-27
Abstract
Abstract Organopolysiloxane modified organic polymers are prepared by reacting organic polymers containing C-bonded hydroxyl groups with organopolysiloxanes containing Si-bonded hydroxyl groups and/or alkyl groups which are bonded to silicon via oxygen in the presence of water in excess of any formed during the reaction.
Inventors
- 👤 Bernward Deubzer
- 👤 Josef Esterbauer
- 👤 Christian Solbrig
- 👤 Volker Frey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:31
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G63/00; C08G63/68; C08G63/695; C08G63/6954; C08G63/91; C08G63/914; C08L; C08L67/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
71 words
A process for preparing organopolysiloxane modified organic polymers which comprises reacting at an elevated temperature a mixture containing an organic polymer free of silicon atoms and having C-bonded hydroxyl groups with an organopolysiloxane containing groups selected from the class consisting of Si-bonded hydroxyl groups, alkyl groups which are bonded to silicon via oxygen and mixtures thereof in the presence of water which is in excess of that formed during the reaction.
Claim 2
Dependent Claim
71 words
A process for preparing organopolysiloxane modified organic polymers which comprises reacting at an elevated temperature a mixture containing an organic polymer free of silicon atoms and having C-bonded hydroxyl groups with an organopolysiloxane containing groups selected from the class consisting of Si-bonded hydroxyl groups, alkyl groups which are bonded to silicon via oxygen and mixtures thereof in the presence of water which is in excess of that formed during the reaction.
Claim 3
Dependent Claim
53 words
The process of claim 1, wherein the amount of water present ranges from 1 to 10 percent by weight, based on the weight of the organic polymer having C-bonded hydroxyl groups and the organopolysiloxane containing groups selected from Si-bonded hydroxyl groups, alkyl groups which are bonded to silicon via oxygen and mixtures thereof.
Claim 4
Dependent Claim
26 words
The process of claim 1, wherein the reaction is conducted in the presence of catalysts which promote the reaction of the organic polymer with the organopolysiloxane.
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) | 1986-01-10 | 1986-07-12 | 1987-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-10 | 1990-07-12 | 1991-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-10 | 1994-07-12 | 1995-01-11 | $7700.00 | Window Closed / Lapsed |