Use of hydroxyalkylphenones as initiators for radiation curing o

Details Use of hydroxyalkylphenones as initiators for radiation curing o Use of hydroxyalkylphenones as initiators for radiation curing o

1983-01-28

1985-10-15

Briggs, Sr., Wilbert J.

Coating processes

Electrical product produced

Welding electrode

20415918, 20415923, 20415924, C08F 250

Patent

active

045473943

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.

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