Claims
- 1. A polyurethane product prepared by reacting an isocyanate terminated urethane prepolymer and a curing agent of the formula: ##SPC4##
- wherein X is a 2-12 carbon alkylene or cycloalkylene group.
- 2. The product of claim 1 wherein said urethane is a polyether type urethane prepolymer.
- 3. The product of claim 1 wherein said urethane is a polyester type urethane prepolymer.
- 4. The product of claim 1 wherein the ratio of said curing agent to said urethane prepolymer is 0.5:1 to 2:1 based on moles of amine to moles of isocyanate.
- 5. The product of claim 4 wherein the ratio of said curing agent to said urethane prepolymer is 0.8:1 to 1.2:1 based on moles of amine to moles of isocyanate.
- 6. The product of claim 5 wherein the ratio of said curing agent to said urethane prepolymer is 0.9:1 based on moles of amine to moles of isocyanate.
- 7. The product as defined in claim 6 wherein said urethane prepolymer has an isocyanate content of about 2-10% by weight.
- 8. The product of claim 1 wherein said urethane prepolymer has an isocyanate content of about 4% by weight.
- 9. The product of claim 1 wherein said reaction is carried out as a hot melt.
- 10. The product of claim 1 wherein said reaction is carried out in a solvent for said urethane prepolymer and said curing agent.
- 11. The product of claim 1 wherein said curing agent is 1,3-propanediol di-p-aminobenzoate.
- 12. The product of claim 1 wherein said curing agent is 1,3-butanediol di-p-aminobenzoate.
- 13. The method of preparing a cured polyurethane prepolymer which comprises reacting an isocyanate terminated urethane composition and a curing agent of the formula: ##SPC5##
- wherein X is a 2-12 carbon alkylene or cycloalkylene group.
- 14. The method of claim 13 wherein said reaction is carried out in a hot melt.
- 15. The method of claim 13 wherein said reaction is carried out in a solution.
- 16. The method of claim 13 wherein the ratio of said curing agent to said urethane prepolymer is 0.5:1 to 2:1 based on moles of amine to moles of isocyanate.
- 17. The method of claim 13 wherein said urethane prepolymer has an isocyanate content of about 4% by weight.
- 18. The method of claim 13 wherein said curing agent is 1,3-propanediol di-p-aminobenzoate.
- 19. The method of claim 13 which includes the step of applying the mixture of said urethane composition and said curing agent to a surface.
- 20. The product of claim 1 wherein said curing agent is 1,5-pentanediol di-p-aminobenzoate.
- 21. The method of claim 13 wherein said curing agent is 1,5-pentanediol di-p-aminobenzoate.
CROSS REFERENCE TO OTHER APPLICATIONS
This application is a continuation-in-part of application Ser. No. 451,079 filed Mar. 14, 1974, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3817940 |
Blahak et al. |
Jun 1974 |
|
Non-Patent Literature Citations (1)
Entry |
Saunders et al., Polyurethanes, Part II, Interscience, N.Y., 1964, p. 353. |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
451079 |
Mar 1974 |
|