US3887602A
Expired / Lapsed
US
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Preparation of new organosilanes
Assignee: Evonik Operations GmbH
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Filing: 1973-12-19
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Granted: 1975-06-03
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Expires: 1993-12-19
Abstract
Abstract The present discovery concerns new organosilanes which possess two silane groups, one of which is located at each end of a polymeric molecule. These compounds are useful in improving the physical properties of synthetic thermoplastic materials which are based on formaldehyde or trioxane and inorganic solids.
Inventors
- 👤 Friedrich Martin Thurn
- 👤 Eugen Meyer-Simon
- 👤 Werner Will
- 👤 Franz Schmidt
- 👤 Wolfgang Schenk
- 👤 Rolf Wurmb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:11
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08J5/08; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/40; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/22; C08F2/24; C08F2/30; C08G; C08G2/00; C08G2/30; C08K; C08K5/00; C08K5/54
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
130 words
Organosilanes of the formula X3Si-R -((OCH2)n-O-R'')m- O-R-SiX3 (I) wherein the X groups may be the same or Different and X is selected from the group consisting of halogen, hydrocarbonoxy of one to seven carbon atoms, acyloxy of one to seven carbon atoms and hydroxyl; the R groups may be the same or different and R is a straight chain or branched bivalent hydrocarbon fragment of two to 10 carbon atoms which is connected to the silicon atom by a silicon-carbon bond and may be interrupted one or more times by an oxygen atom; R'' is an alkylene group of two to six carbon atoms which may contain one or two oxygen bridges; n is a number from 1.0 to 5.0; and m is a number from about 10 to 200.
Claim 2
Dependent Claim
130 words
Organosilanes of the formula X3Si-R -((OCH2)n-O-R'')m- O-R-SiX3 (I) wherein the X groups may be the same or Different and X is selected from the group consisting of halogen, hydrocarbonoxy of one to seven carbon atoms, acyloxy of one to seven carbon atoms and hydroxyl; the R groups may be the same or different and R is a straight chain or branched bivalent hydrocarbon fragment of two to 10 carbon atoms which is connected to the silicon atom by a silicon-carbon bond and may be interrupted one or more times by an oxygen atom; R'' is an alkylene group of two to six carbon atoms which may contain one or two oxygen bridges; n is a number from 1.0 to 5.0; and m is a number from about 10 to 200.
Claim 3
Dependent Claim
34 words
Organosilanes of formula I as set forth in claim 1 wherein one X group per silicon atom is selected from the group consisting of lower alkyl of one to five carbon atoms and phenyl.
References Cited (Backward Citations)
US3218344A
Cited
US3410820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |