Claims
- 1. A method of improving the pot life of a polyisocyanate composition, comprising admixing with the composition, an effective amount of an aldimine oxazolidine compound having the formula: ##STR6## wherein: R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are, individually, a hydrogen atom, a methyl or methylol group, an ethyl or ethylol group, a straight chain or branched chain alkyl or alkanol group, a cycloalkyl group, or an aryl group, including any of the above groups substituted by nitro, halogen, thiol and amino functional groups, such that when both R.sub.7 and R.sub.8 are hydrogen atoms, neither R.sub.3 nor R.sub.4 are hydrogen atoms; m and n are integers of one to three, and m+n is between two and four; and X is a covalent bond between the nitrogen atom of the aldimine group and the nitrogen atom of the oxazolidine group or an (m+n)-valent methylene group, ethylene group, straight chain or branched chain alkylene group, cycloalkylene group, or arylene group, including any of the above X groups substituted by nitro, halogen, thiol and amino functional groups.
- 2. The method of improving the pot life of claim 1, wherein said polyisocyanate composition is used to prepare a coating, elastomer, adhesive or sealant.
- 3. The method of improving the pot life of claim 1, wherein the effective amount of said aldimine oxazolidine compound is from about 1 to about 80 weight percent of the total weight of said composition.
- 4. The method of improving the pot life of claim 1, wherein the effective amount of said aldimime oxazolidine compound is from about 1 to about 50 weight percent of the total weight of said composition.
- 5. The method of improving the pot life of claim 1, wherein the effective amount of said aldimine oxazolidine compound is from about 1 to about 30 weight percent of the total weight of said composition.
- 6. The method of claim 1 wherein R.sub.1 -R.sub.4 are alkyl groups.
- 7. The method of claim 6 wherein at least one of R.sub.1 -R.sub.4 is a methyl group.
- 8. The method of claim 6 wherein at least one of R.sub.1 -R.sub.4 is an ethyl group.
- 9. The method of claim 1 wherein R.sub.5 and R.sub.6 are alkyl groups.
- 10. The method of claim 9 wherein at least one of R.sub.5 and R.sub.6 is a methyl group.
- 11. The method of claim 9 wherein at least one of R.sub.5 and R.sub.6 is an ethyl group.
- 12. The method of claim 1 wherein X is an (m+n)-valent alkylene group.
- 13. The method of claim 12 wherein X is an (m+n)-valent methylene group.
- 14. The method of claim 12 wherein X is an (m+n)-valent ethylene group.
- 15. The method of claim 1 wherein R.sub.1 and R.sub.4 are isopropyl groups, R.sub.2, R.sub.3, R.sub.5, and R.sub.6 are hydrogen, R.sub.7 and R.sub.8 are methyl groups, X is an isobutyl group, and m and n are 1.
Parent Case Info
This application is a continuation-in-part of application Ser. No. 08/143,470, filed on Oct. 26, 1993, now U.S. Pat. No. 5,466,796, issued Nov. 14, 1995.
US Referenced Citations (10)
Foreign Referenced Citations (1)
Number |
Date |
Country |
3019356 |
Nov 1981 |
DEX |
Non-Patent Literature Citations (1)
Entry |
Primary Technical Data Sheet, "Zoldine RD-4 Aldimine Oxazolidine Reactive Diluent," PDS 15, 1993. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
143470 |
Oct 1993 |
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