Claims
- 1. A thixotropic amino formaldehyde resin with a urea-functional compound obtainable by adding a polyisocyanate-functional compound to a monoamine-functional compound or a monoisocyanate-functional compound to a polyamine-functional compound in the presence of the amino formaldehyde resin and reacting the amine and isocyanate-functional compounds to form the urea-functional compound entangled as solid material in the resin.
- 2. The thixotropic amino formaldehyde resin of claim 1, wherein the amount of the urea-functional compound is at least 4 times the amount of free formaldehyde that is present in the amino formaldehyde resin.
- 3. The thixotropic amino formaldehyde resin of claim 1, wherein the monoamine-functional compound is hexylamine, methoxypropylamine, ethoxypropylamine, benzylamine, or mixtures thereof, and the polyisocyanate-functional compound is 1,6-hexamethylene diisocyanate, isophorone diisocyanate, toluene diisocyanate, isocyanurate of hexamethylene diisocyanate, or mixtures thereof.
- 4. The thixotropic amino formaldehyde resin of claim 1, wherein the monoisocyanate-functional compound is hexyl isocyanate, methoxypropyl isocyanate, ethoxypropyl isocyanate, benzyl isocyanate, or mixtures thereof, and the polyamine is 1,6-hexamethylene diamine, isophorone diamine, toluene diamine, or mixtures thereof.
- 5. A process for the preparation of a thixotropic amino formaldehyde resin with a urea-functional compound comprising the steps of adding a polyisocyanate-functional compound to a monoamine-functional compound or adding a monoisocyanate-functional compound to a polyamine-functional compound in the presence of the amino formaldehyde resin, and reacting the amine and isocyanate-functional compounds to form the urea-functional compound entangled to the resin.
- 6. A coating or adhesive composition comprising the thixotropic amino formaldehyde resin of claim 1.
- 7. A method of cross-linking a high temperature-curing coating composition comprising applying the amino formaldehyde resin of claim 1.
Priority Claims (1)
Number |
Date |
Country |
Kind |
98204363.0 |
Dec 1998 |
EP |
|
Parent Case Info
[0001] This application is a continuation of PCT/EP99/10180, filed Dec. 20, 1999, which claims priority of European Patent Application No. 98204363.0, filed Dec. 22, 1998.
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/EP99/10180 |
Dec 1999 |
US |
Child |
09884195 |
Jun 2001 |
US |