Thermally stable adhesive
First Claim
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1. An adhesive composition comprising:
- (a) a soluble polyimide resin;
(b) an appropriate solvent for said polyimide resin;
(c) a tackifier;
(d) an epoxy resin;
(e) a hardener for said epoxy resin;
(f) a catalyst which accelerates the curing of said epoxy resin;
(g) a cross-linking agent reactive with the polyimide solvent of (b);
(h) a catalyst which catalyzes the cross-linking reaction of (b) and (g); and
(i) a filler material.
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Abstract
A novel adhesive exhibiting low outgassing upon exposure to high temperature is disclosed. The instant adhesive comprises: (a) a soluble polyimide resin, (b) a solvent for said polyimide resin, (c) a tackifier, (d) an epoxy resin, (e) a hardener for said epoxy resin, (f) a catalyst which catalyzes the reaction between the epoxy and hardener, (g) a cross-linking agent reactive with the polyimide solvent of (b), (h) a catalyst which accelerates the reaction between (b) and (g), and (i) a filler material. Optionally, the adhesive may also contain a conductive material. A process for making the adhesive is also disclosed.
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Citations
97 Claims
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1. An adhesive composition comprising:
- (a) a soluble polyimide resin;
(b) an appropriate solvent for said polyimide resin;
(c) a tackifier;
(d) an epoxy resin;
(e) a hardener for said epoxy resin;
(f) a catalyst which accelerates the curing of said epoxy resin;
(g) a cross-linking agent reactive with the polyimide solvent of (b);
(h) a catalyst which catalyzes the cross-linking reaction of (b) and (g); and
(i) a filler material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
- (a) a soluble polyimide resin;
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46. A process for the manufacture of an adhesive composition comprising:
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(a) mixing together the polyimide resin and the polyimide solvent, (b) adding the tackifier which imparts tackiness to the B-staged adhesive film, (c) mixing together the epoxy and curing agent for the epoxy and then adding this mixture to (b), (d) adding a catalyst dissolved in the polyimide solvent to mixture (c), (e) mixing together the second cross-linking agent and a catalyst which catalyzes the cross-linking reaction between the cross-linking agent and the polyimide solvent and adding this mixture to the mixture of (d), and (f) adding a suitable amount of filler. - View Dependent Claims (47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97)
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Specification