Utilization of phenylglyoxalic acid esters as photoinitiators

US6562464B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Reinhold Schwalm · Monsheim, DE
• Rainer Koniger · Freinsheim, DE

Key dates

• Filing date: Sep 21, 2001
• Grant date: May 13, 2003
• Expiry date: Sep 21, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31504
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The use of phenylglyoxalic esters of the formula I in which the two radicals R1 and A are as defined in the descriptionas photoinitiators in powder coating materials for exterior applications. The compounds of the formula I show little propensity toward yellowing.