Claims
- 1. A moisture-activated liquid adhesive composition having a pot life of at least about one month under anhydrous conditions, comprising the reaction product of:(a) a polyisocyanate and (b) an isocyanate-reactive component comprising an amine-initiated polyol having an ethylene oxide content of at least 1%, an average molecular weight from about 1,500 to about 10,000 said polyol being represented by the following formula (1) wherein each x independently represents an integer of 1 to 29.0 and each y is 0.1to 10.
- 2. A moisture-activated adhesive composition as in claim 1, further comprising a catalyst.
- 3. A moisture-activated adhesive composition as in claim 1, wherein said polyisocyanate is a polymeric polyisocyanate.
- 4. A moisture-activated adhesive composition as in claim 3, wherein said polymeric polyisocyanate is a polymeric diphenylmethane diisocyanate.
- 5. A moisture-activated adhesive composition as in claim 1, wherein said polyisocyanate is an isocyanate-terminated prepolymer having an NCO content of 10 to 26%.
- 6. A moisture-activated adhesive composition as in claim 5, wherein said polyisocyanate is the reaction product of polymeric diphenylmethane diisocyanate and a polyether polyol having a molecular weight of from about 1000 to about 3000.
- 7. A moisture-activated adhesive composition as in claim 1, wherein said polyisocyanate is a blend of polymeric diphenylmethane diisocyanate and pure diphenylmethane diisocyanate.
- 8. A moisture-activated adhesive composition as in claim 1, wherein said amine-initiated polyol has an ethylene oxide content of 1 to 90%.
- 9. A moisture-activated adhesive composition as in claim 8, wherein said amine-initiated polyol has an ethylene oxide content of 5 to 60%.
- 10. A moisture-activated adhesive composition as in claim 1, wherein said amine-initiated polyol has a molecular weight of 1500 to 10,000 and comprises an initiator having 1 to 18 carbon atoms.
- 11. A moisture-activated adhesive composition as in claim 1, wherein the concentration of nitrogen in the aliphatic tertiary amine-initiated polyol is 0.002 to 0.02 eqN/100 g.
- 12. A moisture-activated adhesive composition as in claim 1, wherein said amine-initiated polyol is prepared from a compound selected from the group consisting of ethylene diamine, triethylene tetramine and triethanolamine.
- 13. A moisture-activated adhesive composition as in claim 2, wherein said catalyst is a tertiary amine catalyst.
- 14. A moisture-activated adhesive composition as in claim 1, comprising 99 to 70% of said plyisocyanate and 1 to 30% by wt of said isocyanate-reactive component.
- 15. A moisture-activated adhesive composition as in claim 1, wherein said aliphatic tertiary amine-initiated polyol has an average molecular weight of from about 1,500 to about 6,000.
- 16. A moisture-activated adhesive composition as in claim 1, wherein said amine-initiated polyol has an average OH functionality of about 1.8 to about 6.0.
- 17. A moisture-activated liquid adhesive composition having a pot life of at least about one month under moisture free conditions comprising the reaction product of:(a) a polyisocyanate and (b) an isocyanate-reactive component comprising an amine-initiated polyol having an ethylene oxide content of at least 1% and an average molecular weight of between about 1,500 and about 10,000, the amine being selected from the group consisting of triethylene tetramine and triethanolamine.
- 18. A moisture-activated adhesive composition as in claim 17, wherein said amine-initiated polyol has an average molecular weight of from about 1,500 to about 6,000.
- 19. A moisture-activated adhesive composition as in claim 17, wherein said amine-initiated polyol has an average OH functionality of about 1.8 to about 6.0.
- 20. A process for bonding multiple lignocellulosic or cellulosic substrates having a moisture content of at least about 7% comprising (1) applying to a surface of a first substrate a moisture-activated adhesive composition as claimed in claim 1; (2) contacting said surface with a surface of a second substrate; (3) applying pressure to the contacted surfaces; and (4) curing said adhesive composition.
- 21. A process for bonding multiple lignocellulosic or cellulosic substrates comprising (1) applying to a surface of a first substrate a moisture-activated adhesive composition as claimed in claim 17; (2) contacting said surface with a surface of a second substrate; (3) applying pressure to the contacted surfaces; and (4) curing said adhesive composition.
- 22. A composite article comprising a first substrate and a second substrate bonded with an adhesive composition as claimed in claim 1.
- 23. A composite article comprising a first substrate and a second substrate bonded with an adhesive composition as claimed in claim 17.
Parent Case Info
CROSS REFERENCE TO RELATED APPLICATIONS
The present application is a continuation-in-part of U.S. patent application Ser. No. 08/136,359, filed Oct. 14, 1993, entitled “Moisture-Activated Adhesive Compositions”, now abandoned.
US Referenced Citations (24)
Foreign Referenced Citations (4)
Number |
Date |
Country |
0012927 |
Jul 1980 |
EP |
0527568 |
Feb 1993 |
EP |
1033928 |
Jun 1966 |
GB |
62-184008 |
Aug 1987 |
JP |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
08/136359 |
Oct 1993 |
US |
Child |
08/319197 |
|
US |