US3890269A
Expired / Lapsed
US
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Process for preparing aminofunctional polysiloxane polymers
Assignee: Wacker Chemical Corp
•
Filing: 1974-03-18
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Granted: 1975-06-17
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Expires: 1994-03-18
Abstract
Abstract The invention relates to a process for preparing aminofunctional organopolysiloxanes which comprises equilibrating a mixture containing organopolysiloxane and an aminofunctional silane or siloxane in the presence of a catalyst. The polysiloxanes are useful as sizing agents and as corrosion inhibitors.
Inventors
- 👤 Eugene Ray Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:02
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/26
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
18 words
A PROCESS FOR PREPARING AMINOFUNCTIONAL POLYSILOXANES WHICH COMPRISES EQUILIBRATING A MIXTURE CONTAINING A CYCLIC ORGANOPOLYSILOXANE OF THE FORMULA
Claim 2
Dependent Claim
18 words
A PROCESS FOR PREPARING AMINOFUNCTIONAL POLYSILOXANES WHICH COMPRISES EQUILIBRATING A MIXTURE CONTAINING A CYCLIC ORGANOPOLYSILOXANE OF THE FORMULA
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein R and R'' are alkyl radicals.
Claim 4
Dependent Claim
10 words
The process of claim 1 wherein the organopolysiloxane is hexamethylcyclotrisiloxane.
Claim 5
Dependent Claim
10 words
The process of claim 1 wherein the organopolysiloxane is octamethylcyclotetrasiloxane.
Claim 6
Dependent Claim
10 words
The process of claim 1 wherein the organopolysiloxane is eicosamethylnonylsiloxane.
Claim 7
Dependent Claim
14 words
The process of claim 1 wherein the aminofunctional compound is represented by the formula
Claim 8
Dependent Claim
15 words
The process of claim 1 wherein the aminofunctional silicon compound is represented by the formula
Claim 9
Dependent Claim
15 words
The process of claim 1 wherein the aminofunctional silicon compound is represented by the formula
Claim 10
Dependent Claim
15 words
The process of claim 1 wherein the aminofunctional silicon compound is represented by the formula
Claim 11
Dependent Claim
15 words
The process of claim 1 wherein the aminofunctional silicon compound is represented by the formula
Claim 12
Dependent Claim
12 words
The process of claim 1 wherein the aminofunctional silicon compound is gamma-aminopropyltriethoxysilane.
Claim 13
Dependent Claim
12 words
The process of claim 1 wherein the aminofunctional silicon compound is beta-(aminoethoxy)-gamma-aminopropyltrimethoxysilane.
Claim 14
Dependent Claim
13 words
The process of claim 1 wherein the aminofunctional silicon compound is methyl beta-(aminoethoxy)propyltri-2-aminoethoxysilane.
Claim 15
Dependent Claim
13 words
The process of claim 1 wherein the catalyst is an alkali metal alkyl.
Claim 16
Dependent Claim
13 words
The process of claim 14 wherein the alkali metal alkyl is n-butyl lithium.
Claim 17
Dependent Claim
17 words
The process of claim 15 wherein the reaction is conducted in the presence of an aprotic solvent.
Claim 18
Dependent Claim
9 words
The product obtained from the process of claim 1.
Claim 19
Dependent Claim
9 words
The product obtained from the process of claim 15.
Claim 20
Dependent Claim
26 words
The process of claim 15 wherein an acid selected from the group consisting of organic and inorganic acids is reacted with the thus formed aminofunctional organopolysiloxane.
Claim 21
Dependent Claim
11 words
The process of claim 19 wherein the acid is acetic acid.
Claim 22
Dependent Claim
11 words
The process of claim 19 wherein the acid is hydrochloric acid.
Claim 23
Dependent Claim
12 words
The process of claim 19 wherein the acid is diethyl hydrogen phsophate.
Claim 24
Dependent Claim
9 words
The product obtained from the process of claim 19.
References Cited (Backward Citations)
US2947771A
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US2972598A
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US3087909A
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US3033815A
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US3481898A
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US3575921A
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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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |