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Patent US3974113A successfully refreshed from Google Patents.
US3974113A
Expired / Lapsed
US
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Liquid modified epoxy resins and their preparation
Assignee: Westinghouse Electric Corp
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Filing: 1971-12-28
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Granted: 1976-08-10
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Expires: 1991-12-28
Abstract
Abstract Liquid modified epoxy resins are prepared by reacting a drying oil with a diepoxide in the presence of certain alkali or alkaline earth metal compounds, preferably a lithium soap such as lithium ricinoleate. The drying oil may be modified by reacting it with maleic acid, maleic anhydride, or fumaric acid to increase the drying rate.
Inventors
- 👤 Daniel R. Sassano
- 👤 Leonard E. Edelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:28
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/14; C08G59/1433; C08G59/1438; C08G59/1455; C08G59/1461; C08G59/1472
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
75 words
A method of making a liquid modified epoxy resin comprising heating under non-hydrolyzing conditions to the clear pill stage 1. about 20 to about 80% of at least one diglycidyl ether of a diphenol having the formula ##EQU1## where R 1 is a diphenol radical selected from the group consisting of ##SPC4## where R 2 is selected from the group consisting of ##EQU2## and ##SPC5## and n is an average of about 0 with 2.
Claim 2
Independent Claim
75 words
A method of making a liquid modified epoxy resin comprising heating under non-hydrolyzing conditions to the clear pill stage 1. about 20 to about 80% of at least one diglycidyl ether of a diphenol having the formula ##EQU1## where R 1 is a diphenol radical selected from the group consisting of ##SPC4## where R 2 is selected from the group consisting of ##EQU2## and ##SPC5## and n is an average of about 0 with 2.
Claim 3
Dependent Claim
42 words
about 20 to about 80% of at least one non-hydroxylated drying oil, in the presence of 3. about 0.0025 to about 0.1% (based on weight of (1) plus (2) of a catalyst selected from the group consisting of alkali and alkaline earth
Claim 4
Dependent Claim
42 words
about 20 to about 80% of at least one non-hydroxylated drying oil, in the presence of 3. about 0.0025 to about 0.1% (based on weight of (1) plus (2) of a catalyst selected from the group consisting of alkali and alkaline earth
Claim 5
Dependent Claim
26 words
metal compounds which have a pH greater than 7. 2. A method according to claim 1 wherein said heating is at about 200°to about 250° .
Claim 6
Dependent Claim
47 words
A method according to claim 1 wherein said compound is a salt of a monocarboxylic organic acid having the formula R-COOH where R is aliphatic from C 8 to C 20 , said salt having a pH less than 11 for 0.1 gm equivalent weight per liter.
Claim 7
Dependent Claim
24 words
A method according to claim 1 wherein said salt is a lithium salt and R is aliphatic from C 12 to C 20 .
Claim 8
Dependent Claim
12 words
A method according to claim 4 wherein said salt is lithium ricinoleate.
Claim 9
Dependent Claim
13 words
A method according to claim 1 wherein ##SPC6## and R 2 is ##STR3##
Claim 10
Dependent Claim
11 words
A method according to claim 1 wherein R 1 is ##SPC7##
Claim 11
Dependent Claim
13 words
A method according to claim 1 wherein said drying oil is linseed oil.
Claim 12
Dependent Claim
24 words
A method according to claim 1 wherein about 40 to about 60% diglycidyl ether is reacted with about 40 to about 60% drying oil.
Claim 13
Dependent Claim
23 words
A method according to claim 1 wherein said reaction is performed under a blanket of a gas that is inert to all reactants.
Claim 14
Dependent Claim
17 words
A method according to claim 1 including the additional step of curing said liquid modified epoxy resin.
Claim 15
Dependent Claim
23 words
A method according to claim 11 wherein said resin is cured with about 80 to 95 stochiometric percent of an anhydride curing agent.
Claim 16
Dependent Claim
15 words
A method according to claim 12 wherein said anhydride curing agent is methyl tetrahydrophthalic anhydride.
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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) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |