Long-wave absorbing photoinitiators

US11401287B2 · kind B2 · utility

Assignee

• Ivoclar Vivadent AG · LI

Inventors

• Norbert Moszner · Eschen, LI
• Yohann Catel · Sevelen, CH
• Pascal Fässler · Sargans, CH
• Michael Haas · Graz, AT
• Judith Radebner · Moargut, AT
• Harald Stüger · Graz, AT

Key dates

• Filing date: Feb 18, 2021
• Grant date: Aug 2, 2022
• Expiry date: Feb 18, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F220/18
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Compounds according to general formula (I) in which M is Ge or Sn, RAr is R1, R2, R3, R4, R5, independently of one another in each case, are —H, —F, —Cl, —OR6, —SR6, —N(R6)2, —CF3, —CN, —NO2, —COOR6, —CONHR6, a branched, cyclic or preferably linear C1-20 alkyl, C2-20 alkenyl, C1-20 alkyloxy or a C2-20 alkenoxy radical, which can be interrupted one or more times by O, S or —NR6— and substituted by one or more polymerizable groups and/or radicals R6, R6 is H, a branched, cyclic or preferably linear C1-20 alkyl or C2-20 alkenyl radical, R7 is a chemical bond, an n-valent aromatic radical or a branched, cyclic or preferably linear C1-20 alkylene radical, which can be interrupted one or more times by O, S or —NR6— and substituted by one or more polymerizable groups, ═O and/or radicals R6, n is 2 or 3 and m is 0 or 1. The compounds are particularly suitable as photoinitiators for radical polymerization and in particular for the production of dental materials.