US4634757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fusion product
Assignee: Resolution Performance Products LLC
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Filing: 1985-07-15
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Granted: 1987-01-06
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Expires: 2005-07-15
Abstract
Abstract A process for reacting an acidic compound or anhydride with an epoxy-containing compound is disclosed. In a preferred embodiment this process comprises reacting a polyepoxide having more than one vic-epoxy group with a phenol in the presence of a methylene bis(triphenylphosphonium)halide catalyst.
Inventors
- 👤 Clifford D. Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:20
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/50; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/688; Y; Y02; Y02P; Y02P20/00; Y02P20/141
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
92 words
A process for preparing an advanced epoxy resin, the process comprising reacting a polyepoxide containing at least one vic-epoxy group with a compound selected from the group consisting of phenols, carboxylic acids and carboxylic acid anhydrides in the presence of a catalyst selected from the group consisting of ##STR11## where R is a hydrocarbyl or inertly substituted hydrocarbyl group and X is a compatible anion, in a reaction mixture of polyepoxide, compound and catalyst having a water content greater than about 0.01 percent by weight of the weight of said reaction mixture.
Claim 2
Dependent Claim
92 words
A process for preparing an advanced epoxy resin, the process comprising reacting a polyepoxide containing at least one vic-epoxy group with a compound selected from the group consisting of phenols, carboxylic acids and carboxylic acid anhydrides in the presence of a catalyst selected from the group consisting of ##STR11## where R is a hydrocarbyl or inertly substituted hydrocarbyl group and X is a compatible anion, in a reaction mixture of polyepoxide, compound and catalyst having a water content greater than about 0.01 percent by weight of the weight of said reaction mixture.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein said compound is a phenol possessing at least one phenolic hydroxyl group.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein R is an aryl group.
Claim 5
Dependent Claim
11 words
The process of claim 3 wherein R is a phenyl group.
Claim 6
Dependent Claim
10 words
The process of claim 1 wherein X is a halide.
Claim 7
Dependent Claim
10 words
The process of claim 5 where the X is bromide.
Claim 8
Dependent Claim
11 words
The process of claim 1 wherein the catalyst is methylene bis(triphenylphosphonium)dibromide.
Claim 9
Dependent Claim
21 words
The process of claim 1 wherein the compound is selected from the group consisting of polycarboxylic acids and polycarboxylic acid anhydrides.
Claim 10
Dependent Claim
27 words
The process of claim 1 wherein the amount of catalyst employed is between about 0.001 and about 1.0 percent by weight based on the amount of polyepoxide.
Claim 11
Dependent Claim
24 words
The process of claim 2 wherein the polyepoxide, phenol and catalyst are reacted at a temperature between about 110° C. and about 200° C.
Claim 12
Dependent Claim
17 words
The process of claim 10 wherein the temperature is between about 180° C. and about 200° C.
Claim 13
Dependent Claim
16 words
The process of claim 10 wherein the phenol is 2,2-bis(4-hydroxyphenyl)propane and the catalyst is methylene bis(triphenylphosphonium)dibromide.
Claim 14
Dependent Claim
14 words
The process of claim 1 wherein the polyepoxide is a diglycidyl ether of 2,2-bis(4-hydroxyphenyl)propane.
Claim 15
Dependent Claim
22 words
The process of claim 13 wherein the diglycidyl ether of 2,2-bis(4-hydroxyphenyl)propane has an epoxide equivalent weight between about 170 and about 500.
Claim 16
Dependent Claim
11 words
The process of claim 13 wherein the compound employed is 2,2-bis(4-hydroxyphenyl)propane.
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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) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |