US3932343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixed epoxy resin-mixed anhydride adhesive compositions
Assignee: Gulf Research and Development Co
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Filing: 1974-05-09
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Granted: 1976-01-13
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Expires: 1994-05-09
Abstract
Abstract A new epoxy resin adhesive composition having exceptionally high tensile lap shear strength is prepared from a mixture of a polyglycidyl ether of a novolac resin, a diglycidyl ether of bisphenol A, 3,4,3',4'-benzophenone tetracarboxylic dianhydride and maleic anhydride. The resin is cured with a metal complex of acetylacetone such as zinc acetylacetonate.
Inventors
- 👤 Walter P. Barie, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:24
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/70; C08G59/20; C08G59/32; C08G59/38; C08G59/40; C08G59/42
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
164 words
A new adhesive composition suitable for application at room temperature and which on curing results in an adhesive joint having excellent tensile lap shear strength comprising a mixture of 3,4,3',4'-benzophenone tetracarboxylic dianhydride and maleic anhydride in a weight ratio of from about 4:1 to about 1:3; a polyglycidyl ether of a phenol-formaldehyde novolac resin having an average of two to about four epoxy groups per molecule and a diglycidyl ether of a dihydric phenol having a molecular weight between about 350 and 600 in an amount to provide an A/E ratio of between about 0.4 and about 1.5 at a weight ratio of the polyglydicyl ether of the novolac resin to the diglycidyl ether of a dihydric phenol of between about 4:1 to about 1:3; and about 0.1 part to about 5 parts of a metal complex of acetylacetone selected from the group consisting of zinc acetylacetonate, iron acetylacetonate, aluminum acetylacetonate, magnesium acetylacetonate, nickel acetylacetonate and zirconium acetylacetonate per 100 parts of epoxy resin.
Claim 2
Dependent Claim
164 words
A new adhesive composition suitable for application at room temperature and which on curing results in an adhesive joint having excellent tensile lap shear strength comprising a mixture of 3,4,3',4'-benzophenone tetracarboxylic dianhydride and maleic anhydride in a weight ratio of from about 4:1 to about 1:3; a polyglycidyl ether of a phenol-formaldehyde novolac resin having an average of two to about four epoxy groups per molecule and a diglycidyl ether of a dihydric phenol having a molecular weight between about 350 and 600 in an amount to provide an A/E ratio of between about 0.4 and about 1.5 at a weight ratio of the polyglydicyl ether of the novolac resin to the diglycidyl ether of a dihydric phenol of between about 4:1 to about 1:3; and about 0.1 part to about 5 parts of a metal complex of acetylacetone selected from the group consisting of zinc acetylacetonate, iron acetylacetonate, aluminum acetylacetonate, magnesium acetylacetonate, nickel acetylacetonate and zirconium acetylacetonate per 100 parts of epoxy resin.
Claim 3
Dependent Claim
55 words
A new adhesive composition in accordance with claim 1 in which the weight ratio of 3,4,3',4'-benzophenone tetracarboxyl dianhydride to maleic anhydride is between about 3:1 and about 1:2 and the weight ratio of the polyglycidyl ether of the novolac resin to the diglycidyl ether of a dihydric phenol is between about 3:1 and about 1:1.
Claim 4
Dependent Claim
19 words
A new adhesive composition in accordance with claim 1 in which the metal complex of acetylacetone is zinc acetylacetonate.
Claim 5
Dependent Claim
58 words
A new adhesive composition in accordance with claim 3 in which the weight ratio of anhydrides is about 1:1, the diglycidyl ether of a dihydric phenol is a diglycidyl ether of bisphenol A in about a 1:2 weight ratio with the polyglycidyl ether of a novolac resin, and the A/E ratio is between about 0.6 and about 1.25.
Claim 6
Dependent Claim
46 words
A new adhesive composition in accordance with claim 1 which includes about 20 parts to about 100 parts of a powdered metal per 100 parts of the resin, and about one part to about 50 parts of a non-metallic oxide filler per 100 parts of resin.
Claim 7
Dependent Claim
159 words
A new cured adhesive composition comprising 3,4,3',4'-benzophenone tetracarboxylic dianhydride and maleic anhydride in a weight ratio of from about 4:1 to about 1:3; and a polyglycidyl ether of a phenol-formaldehyde novolac resin having an average of two to about four epoxy groups per molecule and a diglycidyl ether of a dihydric phenol having a molecular weight between about 350 and 600 in an amount to provide an A/E ratio of between about 0.4 and about 1.5 at a weight ratio of the polyglycidyl ether of the novolac resin to the diglycidyl ether of a dihydric phenol of between about 4:1 to about 1:3; said composition prepared at a temperature between about 100° C. and about 250° C. in the presence of about 0.1 part to about 5 parts of a metal complex of acetylacetone selected from the group consisting of zinc acetylacetonate, iron acetylacetonate, aluminum acetylacetonate, magnesium acetylacetonate, nickel acetylacetonate and zirconium acetylacetonate per 100 parts of epoxy resin.
Claim 8
Dependent Claim
159 words
A new cured adhesive composition comprising 3,4,3',4'-benzophenone tetracarboxylic dianhydride and maleic anhydride in a weight ratio of from about 4:1 to about 1:3; and a polyglycidyl ether of a phenol-formaldehyde novolac resin having an average of two to about four epoxy groups per molecule and a diglycidyl ether of a dihydric phenol having a molecular weight between about 350 and 600 in an amount to provide an A/E ratio of between about 0.4 and about 1.5 at a weight ratio of the polyglycidyl ether of the novolac resin to the diglycidyl ether of a dihydric phenol of between about 4:1 to about 1:3; said composition prepared at a temperature between about 100° C. and about 250° C. in the presence of about 0.1 part to about 5 parts of a metal complex of acetylacetone selected from the group consisting of zinc acetylacetonate, iron acetylacetonate, aluminum acetylacetonate, magnesium acetylacetonate, nickel acetylacetonate and zirconium acetylacetonate per 100 parts of epoxy resin.
Claim 9
Dependent Claim
55 words
A new adhesive composition in accordance with claim 6 in which the weight ratio of 3,4,3',4'-benzophenone tetracarboxylic dianhydride to maleic anhydride is between about 3:1 and about 1:2 and the weight ratio of the polyglydicyl ether of the novolac resin to the diglycidyl ether of a dihydric phenol is between about 3:1 and about 1:1.
Claim 10
Dependent Claim
60 words
A new adhesive composition in accordance with claim 6 in which the weight ratio of the anhydrides is about 1:1, the diglycidyl ether of a dihydric phenol is a diglycidyl ether of bisphenol A at a weight ratio to the polyglycidyl ether of the novolac resin of about 1:2 and the A/E ratio is between about 0.6 and about 1.25.
Claim 11
Dependent Claim
46 words
A new adhesive composition in accordance with claim 8 which includes about 20 parts to about 100 parts of a powdered metal per 100 parts of the resin, and about one part to about 50 parts of a non-metallic oxide filler per 100 parts of resin.
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) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |