US5009934A
Expired / Lapsed
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Process for preparing poly-(imidesiloxanes)
Assignee: Consortium fuer Elektrochemische Industrie GmbH
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Filing: 1990-07-06
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Granted: 1991-04-23
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Expires: 2010-07-06
Abstract
Abstract A process for preparing poly-(imidesiloxanes) which comprises reacting an N,N'-dialkenyldiimide with an organosilicon compound containing two Si-bonded hydrogen atoms in the presence of a catalyst which promotes the addition of Si-bonded hydrogen to an aliphatic multiple bond.
Inventors
- 👤 Guido Wenski
- 👤 Ludwig Maier
- 👤 Franz-Heinrich Kreuzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:49
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1057; C08G73/106; B; B01; B01D; B01D71/00; B01D71/06; B01D71/58; B01D71/62; B01D71/64; B01D71/70; B01D71/702; C08G77/00; C08G77/48; C08G77/54; C08G77/60
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
37 words
A process for preparing poly-(imidesiloxanes) which comprises reacting an N,N'-dialkenyldiimide with an organosilicon compound containing two Si-bonded hydrogen atoms in the presence of a catalyst which promotes the addition of Si-bonded hydrogen to an aliphatic multiple bond.
Claim 2
Dependent Claim
37 words
A process for preparing poly-(imidesiloxanes) which comprises reacting an N,N'-dialkenyldiimide with an organosilicon compound containing two Si-bonded hydrogen atoms in the presence of a catalyst which promotes the addition of Si-bonded hydrogen to an aliphatic multiple bond.
Claim 3
Dependent Claim
39 words
The process of claim 1, wherein the N,N'-dialkenyldiimide has the formula ##STR9## in which R is a tetravalent organic radical free from aliphatic multiple bonds and R 1 is a monovalent organic radical having an aliphatic carbon-carbon double bond.
Claim 4
Dependent Claim
22 words
The process of claim 1, wherein the N,N'-dialkenyldiimide is selected from the group consisting of N,N'-diallylpyromellitic diimide, N,N'-diallyl-3,3',4,4'-benzophenonetetracarboxylic diimide and N,N'-dially1,4,5,8-naphthalenetetracarboxylic diimide.
Claim 5
Dependent Claim
119 words
The process of claim 1, wherein the organosilicon compound has units of the general formula ##STR10## in which R 2 is selected from the group consisting of monovalent SiC-bonded organic radicals which are free from an aliphatic multiple bond, and substituted monovalent SiC-bonded organic radicals which are free from an aliphatic multiple bond, R 3 is selected from the group consisting of an oxygen atom, divalent SiC-bonded organic radicals which are free from an aliphatic multiple bond and divalent substituted SiC-bonded organic radicals which are free from an aliphatic multiple bond, and a is 0, 1 or 2, b is 0, 1, 2 or 3 and the sum of a and b is less than or equal to 3.
Claim 6
Dependent Claim
26 words
The process of claim 1, wherein the organosilicon compound having two Si-bonded hydrogen atoms is an α,ω-dihydrogendimethyl(poly)siloxane having from 3 to 20 silicon atoms per molecule.
Claim 7
Dependent Claim
26 words
The process of claim 4, wherein the organosilicon compound having two Si-bonded hydrogen atoms is an α,ω-dihydrogendimethyl(poly)siloxane having from 3 to 20 silicon atoms per molecule.
Claim 8
Dependent Claim
24 words
The process of claim 1, wherein the molar ratio of N,N'-dialkenyldiimide to organosilicon compound having two Si-bonded hydrogen atoms is between 1:0.7 and 1:1.3.
Claim 9
Dependent Claim
29 words
The process of claim 1, wherein the reaction is carried out in the presence of a solvent which is inert with respect to the reactants and the reaction product.
Claim 10
Dependent Claim
19 words
The process of claim 1, wherein the reaction is carried out at temperatures between 0° C. and 200° C.
Claim 11
Dependent Claim
19 words
The process of claim 1, wherein the reaction is carried out under a pressure between 900 and 1,100 hPa.
Claim 12
Dependent Claim
30 words
A process for coating a substrate which comprises applying a solution of the poly-(imidesiloxane) obtained from the process of claim 1 to a substrate and thereafter drying the coated substrate.
Claim 13
Dependent Claim
17 words
Sheeting material which is prepared from the poly-(imidesiloxanes) obtained in accordance with the process of claim 1.
Claim 14
Dependent Claim
19 words
A gas separation membrane which is prepared from the poly-(imidesiloxanes) obtained in accordance with the process of claim 1.
References Cited (Backward Citations)
US4795680A
Cited
US4853452A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-04-22 | 1994-10-22 | 1995-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-22 | 1998-10-22 | 1999-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-22 | 2002-10-22 | 2003-04-23 | $7700.00 | Window Closed / Lapsed |