US3903052A
Expired / Lapsed
US
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Polymers containing alkoxysilyl-substituted biuret groups and processes for their preparation
Assignee: Bayer AG
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Filing: 1973-08-17
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Granted: 1975-09-02
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Expires: 1993-08-17
Abstract
Abstract New polyurethanes which contain silyl-substituted biuret groups in side chains are described. These polyurethanes have high storage stability, high reactivity and can be crosslinked by moisture with the formation of siloxane segments to form high quality end products. The products can be used for the production of high elastic films and temperature resistant and chemically resistant lacquers which can be applied to a wide variety of substrates.
Inventors
- 👤 Kuno Wagner
- 👤 Hans Jurgen Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:29
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/83; C08G18/837; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/79; C08G18/798; Y; Y10; Y10S; Y10S528/00; Y10S528/901
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
6 words
Silyl-substituted biuret derivatives of the formula:
Claim 2
Dependent Claim
6 words
Silyl-substituted biuret derivatives of the formula:
Claim 3
Dependent Claim
38 words
The product of claim 1 wherein Q represents a radical which has been obtained by the removal of c-hydroxyl groups or amino groups from a polyol or polyamine which contains silylized biuret groups of the following general formula:
Claim 4
Dependent Claim
18 words
The product of claim 1 wherein Q represents a radical with a molecular weight of 1000 to 80,000.
Claim 5
Dependent Claim
22 words
The product of claim 2 wherein n 1 or 2 r 0 to 4 p 1 to 4 c 2 or 3
Claim 6
Dependent Claim
20 words
Process for the preparation of silyl-substituted biuret derivatives according to claim 1, comprising reaction aminoalkyl silane derivative of the formula
Claim 7
Dependent Claim
22 words
Process according to claim 5, wherein the solvent consists completely or partly of secondary or tertiary alcohols, halogenated hydrocarbons or acylated amides.
Claim 8
Dependent Claim
42 words
Process according to claim 6, wherein the secondary alcohol used is isopropyl alcohol, the tertiary alcohol used is tertiary butanol, the halogenated hydrocarbons used are methylene chloride, chloroform, trichloromonofluoromethane, perchloroethyleNe or trichloroethylene, and the acylated amides used are dimethylformamide, methylformamide or dimethylacetamide.
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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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |