Claims
- 1. A method for adhering a first surface to a second surface comprising the steps of:
- mixing together:
- (a) a curable glycidyl ether epoxide group-containing compound,
- (b) an amino-terminated aliphatic polyether curing agent,
- (c) a polymeric toughening agent having both a rubbery phase and a thermoplastic phase or being capable of forming, with the epoxide group-containing material, both a rubbery phase and a thermoset phase on curing, and
- (d) a metal salt catalyst capable of providing an exotherm of at least 20.degree. C.;
- applying the resulting mixture to a portion of at least said first surface;
- contacting said first and second surfaces in bonding relationship with said mixture disposed therebetween; and
- curing said mixture.
- 2. The method of claim 1 wherein said mixture contains 75 to 100 parts by weight curable glycidyl ether epoxide group-containing compound, an effective amount of said amino-terminated aliphatic polyether curing agent, 8 to 40 parts by weight of said polymeric toughening agent and 1 to 10 parts by weight of said catalyst, said catalyst being selected from calcium nitrate, lanthanum nitrate, and metal salts having calcium, strontium, or barium cations and perchlorate or trifluoromethane sulfonate anions.
- 3. An article comprising a first substrate adhered to a second substrate, according to the method of claim 1 said substrates being adhered together by an epoxy resin composition containing
- (a) a curable glycidyl ether epoxide group-containing compound,
- (b) an amino-terminated aliphatic polyether curing agent,
- (c) a polymeric toughening agent having both a rubbery phase and a thermoplastic phase or being capable of forming, with the epoxide group-containing material both a rubbery phase and a thermoset phase on curing, and
- (d) a metal salt catalyst capable of providing an exotherm of at least 20.degree. C.
- 4. The method of claim 1 wherein said catalyst is a metal salt selected from calcium nitrate, lanthanum nitrate or metal salts having calcium, strontium, or barium cations, and perchlorate or trifluoromethane sulfonate anions.
- 5. The method of claim 1 wherein said toughening agent is a core/shell polymer selected from methacrylate/butadiene-styrene, acrylate-methacrylate/butadiene-styrene, acrylonitrile/butadiene-styrene, methacrylate/acrylate polymers or combinations thereof.
- 6. The method of claim 1 wherein said toughening agent is a carboxyl-terminated butadiene acrylonitrile polymer.
BACKGROUND OF THE INVENTION
1. Related Applications
This application is a division of application Ser. No. 842,461, filed Mar. 21, 1986, now U.S. Pat. No. 4,668,763, which is a continuation-in-part of application Ser. No. 632,213 filed July 18, 1984, now abandoned.
US Referenced Citations (12)
Foreign Referenced Citations (3)
Number |
Date |
Country |
1645079 |
Jul 1972 |
DEX |
1105772 |
Mar 1968 |
GBX |
1484797 |
Sep 1977 |
GBX |
Non-Patent Literature Citations (1)
Entry |
Toughening of Plastics, Adhesive Fracture Behaviro of CTBN-Modified Epoxy Polymers, W. D. Bascom and D. L. Hunston of the Naval Research Laboratory. |
Divisions (1)
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Number |
Date |
Country |
Parent |
842461 |
Mar 1986 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
632213 |
Jul 1984 |
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