US4701511A
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Method of making diglyme soluble siloxane-imide copolymers
Assignee: Shin Etsu MicroSi Inc
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Filing: 1984-10-19
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Granted: 1987-10-20
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Expires: 2004-10-19
Abstract
Abstract There is provided a process for making diglyme soluble siloxane-imide copolymers consisting essentially of (a) heating a mixture of diglyme, azeotropic solvent, organic diamine and bis-aminoalkyl-terminated polydiorganosiloxane to reflux and (b) adding to the refluxing mixture of (a) an organic dianhydride of the formula ##STR1## where Ar is an aromatic or aromatic containing group and Y is oxygen or sulfur. Block copolymers are obtained if the bis-aminoalkyl-terminated polydiorganosiloxane is not added to the reaction mass until after the reaction of the organic diamine and organic dianhydride has been completed.
Inventors
- 👤 Vivian B. Valenty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:07
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G77/452; C08G77/455; C08G73/00; C08G73/06; C08G73/10; C08G73/1003; C08G73/1007; C08G73/101; C08G73/1057; C08G73/106; C08G73/1064; C08G73/1067; C08G73/1071
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
58 words
A process for making random siloxane-imide copolymers in situ consisting essentially of: (a) heating a mixture of diglyme, azeotropic solvent, organic diamine and bis-alkylamino-terminated polydiorganosiloxane to reflux, and (b) adding to the refluxing mixture of (a) an organic dianhydride of the formula ##STR22## where Ar is an aromatic or aromatic containing group and Y is oxygen or sulfur.
Claim 2
Dependent Claim
58 words
A process for making random siloxane-imide copolymers in situ consisting essentially of: (a) heating a mixture of diglyme, azeotropic solvent, organic diamine and bis-alkylamino-terminated polydiorganosiloxane to reflux, and (b) adding to the refluxing mixture of (a) an organic dianhydride of the formula ##STR22## where Ar is an aromatic or aromatic containing group and Y is oxygen or sulfur.
Claim 3
Dependent Claim
91 words
A process for making block siloxane-imide copolymers in situ consisting essentially of: (a) heating a mixture of diglyme, azeotropic solvent and organic diamine to reflux (b) adding to the refluxing mixture of (a) an amount of organic dianhydride of the formula ##STR23## where Ar is an aromatic or aromatic-containing group Y is oxygen or sulfur, in molar excess of the amount required to react with the organic diamine, and (c) adding to the refluxing mixture resulting from (b) a bis-aminoalkyl-terminated polydiorganosiloxane in an amount approximately equivalent to the unreacted organic dianhydride.
Claim 4
Dependent Claim
91 words
A process for making block siloxane-imide copolymers in situ consisting essentially of: (a) heating a mixture of diglyme, azeotropic solvent and organic diamine to reflux (b) adding to the refluxing mixture of (a) an amount of organic dianhydride of the formula ##STR23## where Ar is an aromatic or aromatic-containing group Y is oxygen or sulfur, in molar excess of the amount required to react with the organic diamine, and (c) adding to the refluxing mixture resulting from (b) a bis-aminoalkyl-terminated polydiorganosiloxane in an amount approximately equivalent to the unreacted organic dianhydride.
Claim 5
Dependent Claim
56 words
The process of claim 1 or 2 wherein the organic diamine has the formula NH.sub.2 --R--NH.sub.2 where R is a radical selected from the group consisting of ##STR24## where R 1 is an alkyl radical having from 1 to 9 carbon atoms and R 2 is an alkylene radical having from 1 to 4 carbon atoms.
Claim 6
Dependent Claim
17 words
The process of claim 1 or 2 wherein R 1 is methyl and R 2 is methylene.
Claim 7
Dependent Claim
49 words
The process of claim 3 wherein the bis-aminoalkyl-terminated polydiorganosiloxane has the formula ##STR25## where R 3 is an independently selected divalent substituted or unsubstituted hydrocarbyl radical and R 4 is an independently selected monovalent substituted or unsubstituted hydrocarbyl radical, and n is equal to 0 or a positive integer.
Claim 8
Dependent Claim
33 words
The process of claim 5 wherein R 3 is an alkylene radical having from 1 to 5 carbon atoms, R 4 is methyl, and n is a number of from 0 to 100.
Claim 9
Dependent Claim
11 words
The process of claim 5 wherein the azeotropic solvent is xylene.
Claim 10
Dependent Claim
27 words
The process of claim 7 wherein the organic dianhydride has the formula ##STR26## wherein Ar is an aromatic or aromatic-containing group and Y is oxygen or sulfur.
Claim 11
Dependent Claim
41 words
The process of claim 8 wherein Ar is a divalent benzene or naphthalene nucleus or a divalent group of the formula ##STR27## where m is 0 or 1 and E is ##STR28## where y is an integer from 1 to 8.
Claim 12
Dependent Claim
39 words
The process of claim 8 wherein Ar is a divalent residue of the formula ##STR29## where G is phenylene or a group of the formula ##STR30## where E is ##STR31## where y is an integer from 1 to 8.
Claim 13
Dependent Claim
14 words
The process of claim 8 wherein Ar is a group of the formula ##STR32##
Claim 14
Dependent Claim
14 words
The process of claim 1 or 2 further comprising collecting water by azeotropic distillation.
Claim 15
Dependent Claim
15 words
The process of claim 1 or 2 wherein the reflux temperature is approximately 150° C.
Claim 16
Dependent Claim
60 words
A process for making random siloxane-imide copolymers in situ consisting essentially of: (a) heating to reflux a mixture of diglyme, azeotropic solvent and an organic dianhydride of the formula ##STR33## where Ar is an aromatic or aromatic-containing group and Y is oxygen or sulfur, (b) adding to the refluxing mixture of (a) a mixture of organic diamine and bis-aminoalkyl-terminated polydiorganosiloxane.
Claim 17
Dependent Claim
60 words
A process for making random siloxane-imide copolymers in situ consisting essentially of: (a) heating to reflux a mixture of diglyme, azeotropic solvent and an organic dianhydride of the formula ##STR33## where Ar is an aromatic or aromatic-containing group and Y is oxygen or sulfur, (b) adding to the refluxing mixture of (a) a mixture of organic diamine and bis-aminoalkyl-terminated polydiorganosiloxane.
Claim 18
Dependent Claim
79 words
A process for making block siloxane-imide copolymers in situ consisting essentially of: (a) heating to reflux a mixture of diglyme, azeotropic solvent and an organic dianhydride of the formula ##STR34## where Ar is an aromatic or aromatic-containing group and Y is oxygen or sulfur, (b) adding to the refluxing mixture of (a), either an organic diamine or a bis-aminoalkyl-terminated polydiorganosiloxane, and (c) adding to the refluxing mixture of (b), the organic diamine or bis-aminoalkyl-terminated polydiorganosiloxane not added in (b).
Claim 19
Dependent Claim
79 words
A process for making block siloxane-imide copolymers in situ consisting essentially of: (a) heating to reflux a mixture of diglyme, azeotropic solvent and an organic dianhydride of the formula ##STR34## where Ar is an aromatic or aromatic-containing group and Y is oxygen or sulfur, (b) adding to the refluxing mixture of (a), either an organic diamine or a bis-aminoalkyl-terminated polydiorganosiloxane, and (c) adding to the refluxing mixture of (b), the organic diamine or bis-aminoalkyl-terminated polydiorganosiloxane not added in (b).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-19 | 1991-04-20 | 1991-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-19 | 1995-04-20 | 1995-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-19 | 1999-04-20 | 1999-10-20 | $7700.00 | Window Closed / Lapsed |