Polyester resin powder coating compositions
US5688894A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 20, 1995 |
| Grant date | Nov 18, 1997 |
| Priority date | — |
| Expiry date | Jun 20, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of curing a powder coating composition comprises reacting a polyester resin with an alkanolamine derivative of titanium or zirconium. This derivative is the reaction product of an orthoester or a condensed orthoester of titanium or zirconium with a trialkanolamine and with a dialkanolamine or a monoalkanolamine. In the reaction product the ratio of trialkanolamino radicals to Ti or Zr atoms is from 0.5:1 to 1.5:1 and the ratio of monoalkanolamino radicals or dialkanolamino radicals to Ti or Zr atoms is from 0.2:1 to 2.0:1. The reaction products are preferably derivatives of ethanolamines or isopropanolamines and can be used to cure carboxyl-rich resins or hydroxyl-rich resins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.