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US4578424A
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US
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High performance two-component epoxy structural adhesives with chemical thixotropy
Assignee: Ashland LLC
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Filing: 1985-05-03
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Granted: 1986-03-25
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Expires: 2005-05-03
Abstract
Abstract A two component adhesive formulation comprising a mixture of A. an epoxy component comprising an epoxy resin and an additive selected from the group consisting of (a) a polyisocyanate, (b) a carboxylic anhydride and (c) a compound having unsaturated carbon-carbon bonds capable of undergoing Michael addition reaction with amines, and B. a hardener component for curing component A comprising a mixture of amido amines, primary and secondary amines having tertiary amine groups or ether groups in their backbone, and bisphenol-A is described.
Inventors
- 👤 Anil B. Goel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:52
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/58; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/56; C08G59/58; C09; C09J; C09J175/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
79 words
A two component adhesive formulation comprising a mixture of A. An epoxy component comprising an epoxy resin and an additive selected from the group consisting of (a) a polyisocyanate, (b) a carboxylic anhydride and (c) molecules with unsaturated carbon-carbon bonds capable of undergoing Michael addition reaction with amines, and B. A hardener component for curing component A comprising a mixture of amido amines, primary and secondary amines having tertiary amine groups or ether groups in their backbone and bisphenol-A.
Claim 2
Dependent Claim
79 words
A two component adhesive formulation comprising a mixture of A. An epoxy component comprising an epoxy resin and an additive selected from the group consisting of (a) a polyisocyanate, (b) a carboxylic anhydride and (c) molecules with unsaturated carbon-carbon bonds capable of undergoing Michael addition reaction with amines, and B. A hardener component for curing component A comprising a mixture of amido amines, primary and secondary amines having tertiary amine groups or ether groups in their backbone and bisphenol-A.
Claim 3
Dependent Claim
28 words
The adhesive formulation of claim 1 wherein there is included in component A from 5 to 20% by weight of a carboxylic acid group terminated butadiene/acrylonitrile copolymer rubber.
Claim 4
Dependent Claim
27 words
The formulation of claim 1 wherein the weight ratio of amido amine: amine bisphenol-A in the hardener component B is in the range of 30-90: 8-35: 2-35.
Claim 5
Dependent Claim
29 words
The adhesive formulation of claim 1 wherein there is also included a filler in from 0.1 to 40% by weight based on the combined weight of A plus B.
Claim 6
Dependent Claim
95 words
The process for manufacturing an adhesive having thixotropic properties comprising mixing A. An epoxy component comprising an epoxy resin and an additive selected from the group consisting of (a) a polyisocyanate, (b) a carboxylic anhydride, and (c) molecules with unsaturated carbon-carbon bonds capable of undergoing Michael addition reaction with amines, with B. A hardener component for curing component A comprising a mixture of amido amines, primary and secondary amines having tertiary amine groups or ether groups in their backbone, and bisphenol-A in a weight ratio of A:B in the range of from 1:1 to 1.5:1.
Claim 7
Dependent Claim
95 words
The process for manufacturing an adhesive having thixotropic properties comprising mixing A. An epoxy component comprising an epoxy resin and an additive selected from the group consisting of (a) a polyisocyanate, (b) a carboxylic anhydride, and (c) molecules with unsaturated carbon-carbon bonds capable of undergoing Michael addition reaction with amines, with B. A hardener component for curing component A comprising a mixture of amido amines, primary and secondary amines having tertiary amine groups or ether groups in their backbone, and bisphenol-A in a weight ratio of A:B in the range of from 1:1 to 1.5:1.
Claim 8
Dependent Claim
27 words
The process of claim 5 wherein there is included in component A from 5 to 20% by weight of a carboxylic acid group terminated butadiene/acrylonitrile copolymer rubber.
Claim 9
Dependent Claim
27 words
The process of claim 5 wherein the weight ratio of amido amine: amine: bisphenol-A in the hardner component B is in the range of 30-90: 8-35: 2-35.
Claim 10
Dependent Claim
28 words
The process of claim 5 wherein there is also included a filler in from 0.1 to 40% by weight based on the combined weight of A plus B.
Claim 11
Dependent Claim
43 words
The ahdesive formulation of claim 3 wherein the amido amine: amine part of the hardner component is the reaction product of the amidation reaction of dimerized linoleic acid with a member selected from the group consisting of 2-amino-ethyl piperazine and bis-(amino propyl) piperazine.
Claim 12
Dependent Claim
19 words
The adhesive formulation of claim 9 wherein the reaction product is that of dimerized linoleic acid with 2-amino-ethyl piperazine.
Claim 13
Dependent Claim
19 words
The adhesive formualtion of claim 9 wherein the reaction product is that of dimerized linoleic acid with bis-(amino propyl)piperazine.
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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) | 1989-03-24 | 1989-09-23 | 1990-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-24 | 1993-09-23 | 1994-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-24 | 1997-09-23 | 1998-03-25 | $7700.00 | Window Closed / Lapsed |