Patent US3856756A successfully refreshed from Google Patents.
US3856756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silyl substituted urea derivatives and a process for their preparation
Assignee: Bayer AG
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Filing: 1972-11-03
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Granted: 1974-12-24
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Expires: 1992-11-03
Abstract
Abstract A process for the preparation of polyaddition compounds of controlled reactivity by reacting polyaddition products which contain alkoxysilane groups of the general formula IN WHICH ARE REACTED WITH ORGANIC POLYISOCYANATES.
Inventors
- 👤 K Wagner
- 👤 G Oertel
- 👤 H Golitz
- 👤 I Golitz
- 👤 B Quiring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:27
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3893; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C08G18/08; C08G18/10; Y; Y10; Y10S; Y10S528/00; Y10S528/903; Y10S528/906
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
51 words
A PROCESS FOR THE PREPARATION OF POLYADDITION PRODUCTS WHICH CONTAIN ALKOXYSILANE GROUPS, COMPRISING REACTING IN THE PRESENCE OF 10 TO 80% BY WEIGHT BASED ON THE SUM OF THE REACTANTS OF A SECONDARY OR TERTIARY ALCOHOL AT A TEMPERATURE BETWEEN -20*C AND + 150*C AN ALKOXYSILANE GROUP OF THE GENERAL FORMULA
Claim 2
Dependent Claim
51 words
A PROCESS FOR THE PREPARATION OF POLYADDITION PRODUCTS WHICH CONTAIN ALKOXYSILANE GROUPS, COMPRISING REACTING IN THE PRESENCE OF 10 TO 80% BY WEIGHT BASED ON THE SUM OF THE REACTANTS OF A SECONDARY OR TERTIARY ALCOHOL AT A TEMPERATURE BETWEEN -20*C AND + 150*C AN ALKOXYSILANE GROUP OF THE GENERAL FORMULA
Claim 3
Dependent Claim
39 words
A process according to claim 1 characterized in that the reaction is carried out with polyhydroxyl compounds or polyamines containing at least two hydrogen atoms that are reactive with isocyanates and having a molecular weight of 62 to 6000.
Claim 4
Dependent Claim
28 words
A process according to claim 1 wherein the secondary and tertiary alcohols are selected from the group consisting of isopropanol, isobutanol, cyclohexanol, tertiary amyl alcohol and tertiary butanol.
Claim 5
Dependent Claim
33 words
A process according to claim 1 wherein the reaction mixtures includes 2 to 60% by weight based on the quantity of the alkoxysilane present an amino alkyl silane derivative comprising the general formula
Claim 6
Dependent Claim
33 words
A process according to claim 1 wherein the reaction mixtures includes 2 to 60% by weight based on the quantity of the alkoxysilane present an amino alkyl silane derivative comprising the general formula.
References Cited (Backward Citations)
GB1207594A
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US3632557A
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US3576033A
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US3726907A
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US3676478A
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US3657303A
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US3711442A
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US3627722A
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US3711445A
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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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |