Patent · US Expired

Photocationic initiator combinations

US6770686B2 · kind B2 · utility

1Cited by

4References

13Claims

0Family size

Assignee

Dainippon Ink and Chemicals, Inc. · JP

Inventors

Rainer B. Frings · Berlin, DE
Gerwald Grahe · Berlin, DE

Key dates

Filing date	May 28, 2002
Grant date	Aug 3, 2004
Priority date	—
Expiry date	Jan 18, 2023

Classification

Technology area (CPC G)Physics
CPC primaryG03F7/038
WIPO fieldOptics
WIPO sectorInstruments

Abstract

New photocationic photoinitiator combinations are described that consist of 2,4,6-triarylpyrylium salts with non-nucleophilic anions and electron donors, that are able rapidly to crosslink unpigmented as well as pigmented mixtures based on cycloaliphatic epoxides to form colourless layers such as lacquers and printing inks without generating interfering and toxic emissions.

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