Use of hydroxyalkylphenones as initiators for radiation curing of aqueous prepolymer dispersions

US4547394A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Claus P. Herz · Heidelberg, DE
• Jorg Ohngemach · Reinheim, DE
• Otto Stahlecker · Darmstadt, DE

Key dates

• Filing date: Jan 28, 1983
• Grant date: Oct 15, 1985
• Expiry date: Jan 28, 2003

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F7/031
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Hydroxyalkylphenones of formula I ##STR1## wherein R is hydrogen, halogen, alkyl of 1 to 18 C atoms, alkoxy of 1 to 4 C atoms or ##STR2## R.sub.a is hydrogen, halogen or alkyl of 1 to 4 C atoms; R.sup.1 and R.sup.2 (a) are each alkyl of up to 14, together 4 to 16, C atoms or together are alkylene of 4 to 8 C atoms, if R is hydrogen, halogen, alkyl of 1 to 6 C atoms or alkoxy of 1 to 4 C atoms, or (b) are each alkyl of 1 to 6 C atoms or together are alkylene of 2 to 8 C atoms, if R is alkyl of 3 to 18 C atoms or ##STR3## R.sup.3 and R.sup.4 are each alkyl of 1 to 6 C atoms or together are alkylene of 2 to 8 C atoms and Z is --CO--, --CH.sub.2 --, --O-- or --S--; are suitable as initiators for radiation curing aqueous prepolymer dispersions. They have good stability in aqueous systems and also upon removal of the water from these systems, and they have a considerably increased reactivity in their ability to initiate the curing of aqueous systems curable by radiation.