Claims
- 1. A method of bonding two materials, comprising the steps of coating a layer of an epoxy resin adhesive composition on a surface of a first material and contacting the coated surface of the first material with a surface of a second material, wherein the epoxy resin composition consists essentially of
- (A) a compound that contains at least two 1,2-epoxide groups and that is a reaction product of:
- (A1) a compound that contains at least two 1,2-epoxide groups per molecule, and
- (A2) a polyoxyalkylenemonoamine that has a number average molecular weight between 130 and 900, and, optionally, one or both of
- (A3) a polyoxyalkylenemonoamine that has a molecular weight of from 900 to 5000, and
- (A4) a polycarboxylic acid, and
- (B) a hardener.
- 2. A method as claimed in claim 1, wherein the surface of the second material additionally is coated with a layer of the composition.
- 3. A method as claimed in claim 1, wherein the two materials are parts of an automobile.
- 4. A method as claimed in claim 1, wherein the epoxy resin composition additionally consists essentially of at least one additive.
- 5. A method as claimed in claim 1, wherein the compound (A1) has an epoxide equivalent weight between 150 and 250.
- 6. A method as claimed in claim 1, wherein polyoxyalkylenemonoamine (A2) has a molecular weight of about 600.
- 7. A method as claimed in claim 1, wherein polycarboxylic acid (A4) comprises a dicarboxylic acid of the formula
- HOOC--CH.sub.2 --[OR].sub.n --O--CH.sub.2 --COOH (1)
- where
- R.sup.1 is an alkylene radical that has from 2 to 5 carbon atoms, and
- n is 0 or an integer from 1 to 300.
- 8. A method as claimed in claim 7, wherein polycarboxylic acid (A4) comprises polyglycolic acid having a molecular weight of about 600.
- 9. A method as claimed in claim 1, wherein the hardener comprises a latent hardener.
- 10. A method as claimed in claim 9, wherein the latent hardener comprises dicyandiamide.
- 11. A method as claimed in claim 1, wherein the latent hardener comprises N-aminoethylpiperazine.
- 12. A method as claimed in claim 9, wherein the latent hardener comprises a mixture of N-aminoethylpiperazine and nonylphenol.
- 13. A method as claimed in claim 4, wherein the additive comprises an accelerator.
- 14. A method as claimed in claim 1, wherein polyoxyalkylenemonoamine (A2) comprises a polyoxypropylenemonoamine.
- 15. A method as claimed in claim 1, wherein polyoxyalkylenemonoamine (A3) comprises a polyoxypropylenemonoamine.
- 16. A method as claimed in claim 1, wherein the epoxy resin composition is coated on the surface of the first material by one of painting, rolling and deposition as a bead on a substrate.
- 17. A method as claimed in claim 1, wherein polyoxyalkylenemonoamine (A2) is a compound of the formula
- CH.sub.3 --O--CH.sub.2 --CH.sub.2 --[O--CH.sub.2 --CH--(CH.sub.3)].sub.9 --NH.sub.2
- 18.
- 18. A method as claimed in claim 1, wherein polyoxyalkylenemonoamine (A2) has the formula
- CH.sub.3 --(O--CH.sub.2 --CH.sub.2).sub.y --[O--CH.sub.2 --CH(CH.sub.3)].sub.x --NH.sub.2
- where, independently of one another, y is from 0 to 10 and x is from 1 to 41.
- 19. A method as claimed in claim 1, wherein polyoxyalkylenemonoamine (A3) comprises a compound of the formula
- CH.sub.3 --(O--CH.sub.2 --CH.sub.2).sub.y --[O--CH.sub.2 --CH(CH.sub.3)].sub.x --NH.sub.2
- where, independently of one another, y is from 0 to 10 and x is from 1 to 41.
- 20. A method as claimed in claim 1, wherein polyoxyalkylenemonoamine (A2) has a molecular weight between about 500 and 700.
- 21. A method as claimed in claim 1, wherein polycarboxylic acid (A4) comprises a dimeric fatty acid that has an acid number between 150 and 230 mg KOH/g.
- 22. A method as claimed in claim 17, wherein R in formula (1) is an ethylene radical and n is an integer from 1 to 50.
- 23. A method as claimed in claim 1, comprising from 20 to 80% by weight of component (A2) and, optionally, from 20 to 50% by weight of component (A3) and from 0.1 to 30% by weight of the component (A4), based on component (A1).
Priority Claims (1)
Number |
Date |
Country |
Kind |
43 42 721.7 |
Dec 1993 |
DEX |
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Parent Case Info
This application is a divisional of application Ser. No. 08/355,303, filed Dec. 12, 1994.
US Referenced Citations (7)
Foreign Referenced Citations (5)
Number |
Date |
Country |
2112410 |
Jan 1993 |
CAX |
109174 |
May 1984 |
EPX |
0166906 |
Jan 1986 |
EPX |
0387418 |
Sep 1990 |
EPX |
2936123 |
Apr 1981 |
DEX |
Non-Patent Literature Citations (2)
Entry |
Chemical Abstracts Accession No. 114-144785 of European Application No. 387,418, Ruetgerswerke A. G., Sep. 19, 1990. |
H. N. Vazirani, "Flexible Epoxy Resins", Adhesives Age, Oct. 1980, pp. 31-35. |
Divisions (1)
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Number |
Date |
Country |
Parent |
355303 |
Dec 1994 |
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