Patent US4398013A successfully refreshed from Google Patents.
US4398013A
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Accelerator for anhydride-cured epoxy resins
Assignee: General Electric Co
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Filing: 1981-10-14
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Granted: 1983-08-09
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Expires: 2001-10-14
Abstract
Abstract An improved process for curing a polyepoxide composition with a polycarboxylic acid or polycarboxylic acid anhydride is described wherein the addition of a diphenyliodonium salt accelerator provides for shortened curing reaction times at lower reaction temperatures or at room temperatures if the composition is exposed to a source of ultraviolet radiation.
Inventors
- 👤 Donald S. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:24
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/68
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
200 words
A process for curing polyepoxides which comprises: (a) preparing an admixture comprising: (i) a polyepoxide having more than one epoxy group; and (ii) at least 0.5 equivalents of at least one member selected from the group consisting of polycarboxylic acid, polycarboxylic acid anhydride or mixtures thereof; (b) adding to said admixture from about 0.01% to about 10% by weight of said admixture of a diarylhalonium complex salt accelerator having the formula [(R).sub.a (R').sub.b X].sub.c.sup.+ [MQ.sub.d ].sup.-(d-e) where R is a monovalent organic radical, R' is a divalent aromatic organic radical X is a halogen radical such as I,Br,Cl, etc., M is a metal or metalloid and Q is a halogen radical such as Cl,F,Br,I, etc., a is a whole number equal to 0 or 2, b is a whole number equal to 0 or 1, the sum of a+b is equal to 2 or the valence of X, c+d-e, e+the valence of M and is an integer equal to 2 to 7 inclusive, and d is >e and is an integer having a value up to 8; (c) exposing said admixture to a means for initiating a curing reaction; and (d) allowing said curing reaction to continue until substantially complete.
Claim 2
Dependent Claim
200 words
A process for curing polyepoxides which comprises: (a) preparing an admixture comprising: (i) a polyepoxide having more than one epoxy group; and (ii) at least 0.5 equivalents of at least one member selected from the group consisting of polycarboxylic acid, polycarboxylic acid anhydride or mixtures thereof; (b) adding to said admixture from about 0.01% to about 10% by weight of said admixture of a diarylhalonium complex salt accelerator having the formula [(R).sub.a (R').sub.b X].sub.c.sup.+ [MQ.sub.d ].sup.-(d-e) where R is a monovalent organic radical, R' is a divalent aromatic organic radical X is a halogen radical such as I,Br,Cl, etc., M is a metal or metalloid and Q is a halogen radical such as Cl,F,Br,I, etc., a is a whole number equal to 0 or 2, b is a whole number equal to 0 or 1, the sum of a+b is equal to 2 or the valence of X, c+d-e, e+the valence of M and is an integer equal to 2 to 7 inclusive, and d is >e and is an integer having a value up to 8; (c) exposing said admixture to a means for initiating a curing reaction; and (d) allowing said curing reaction to continue until substantially complete.
Claim 3
Dependent Claim
29 words
A process as recited in claim 1 wherein said means for initiating the curing reaction comprises heat sufficient to raise the temperature of the admixture to above room temperature.
Claim 4
Dependent Claim
21 words
A process as recited in claim 1 wherein said means for initiating the curing reaction comprises a source of ultraviolet radiation.
Claim 5
Dependent Claim
18 words
A process as recited in claim 1 wherein the diarylhalonium complex salt accelerator is a diphenyliodonium salt accelerator.
Claim 6
Dependent Claim
15 words
A process as recited in claim 1 wherein said polycarboxylic acid anhydride comprises tetrahydrophthalic anhydride.
Claim 7
Dependent Claim
16 words
A process as recited in claim 1 wherein said polyepoxide comprises diglycidyl ether of bisphenol A.
Claim 8
Dependent Claim
21 words
The process of claim 1 wherein said polyepoxide and at least one of said group are present in about equivalent amounts.
Claim 9
Dependent Claim
26 words
The process of claim 1 wherein diarylhalonium complex salt is added in a concentration of from about 0.05% to about 5% by weight of said admixture.
Claim 10
Dependent Claim
151 words
A composition comprising the mixture of: (a) a polyepoxide having more than one epoxy group; (b) at least 0.5 equivalents of at least one member selected from the group consisting of: (i) a polycarboxylic acid, (ii) a polycarboxylic acid anhydride, and (iii) mixtures thereof; (c) from about 0.01% to about 10% by weight of said composition of a diarylhalonium complex salt accelerator having the formula [(R).sub.a (r').sub.b X].sub.c.sup.+[MQ.sub.d ].sup.-(e-e) where R is a monovalent organic radical, R' is a divalent aromatic organic radical X is a halogen radical such as I,Br,Cl, etc., M is a metal or metalloid and Q is a whole number equal to 0 or 1, the sum of a+b is equal to 2 or the valance of X, c+d-e, e+the valence of M and is an integer equal to 2 to 7 inclusive, and d is >e and is an integer having a value up to 8.
Claim 11
Dependent Claim
151 words
A composition comprising the mixture of: (a) a polyepoxide having more than one epoxy group; (b) at least 0.5 equivalents of at least one member selected from the group consisting of: (i) a polycarboxylic acid, (ii) a polycarboxylic acid anhydride, and (iii) mixtures thereof; (c) from about 0.01% to about 10% by weight of said composition of a diarylhalonium complex salt accelerator having the formula [(R).sub.a (r').sub.b X].sub.c.sup.+[MQ.sub.d ].sup.-(e-e) where R is a monovalent organic radical, R' is a divalent aromatic organic radical X is a halogen radical such as I,Br,Cl, etc., M is a metal or metalloid and Q is a whole number equal to 0 or 1, the sum of a+b is equal to 2 or the valance of X, c+d-e, e+the valence of M and is an integer equal to 2 to 7 inclusive, and d is >e and is an integer having a value up to 8.
Claim 12
Dependent Claim
22 words
The composition of claim 9 wherein the polyepoxide and the at least one of said group are present in about equivalent amounts.
Claim 13
Dependent Claim
26 words
The composition of claim 9 wherein said complex salt is present in a concentration of from about 0.05% to about 5.0% by weight of said composition.
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) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |