Patent · US Expired

Method for hardening powder coatings

US6531189B1 · kind B1 · utility

8Cited by

2References

5Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

Karsten Blatter · Lechenich, DE
Olaf Thiele · Riedlingen, DE

Key dates

Filing date	Jul 20, 2001
Grant date	Mar 11, 2003
Priority date	—
Expiry date	Jul 20, 2021

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09D5/03
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Process for curing powder lacquers by coating substrates with the powder lacquers and irradiating by radiation in the near infrared range (NIR radiation), which is characterized in that the curing times and/or the surface temperatures, obtainable by means of the radiation during certain curing times, of the substrates coated with the powder lacquers are controlled by setting the barium sulfate and/or aluminium oxide content of the powder lacquers to 1 to 50 wt. % and/or setting the carbon black content of the powder lacquers to 0.1 to 5 wt. %, the percentages by weight relating to the entire powder lacquer composition in each case.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.