Use of hydroxyalkylphenones as initiators for radiation...

Details Use of hydroxyalkylphenones as initiators for radiation... Use of hydroxyalkylphenones as initiators for radiation...

C - Chemistry, Metallurgy

08

K

400/5151, 400/70

C08K 5/07 (2006.01) C08F 2/50 (2006.01) C08K 5/37 (2006.01) G03F 7/031 (2006.01)

Patent

CA 1218490

"USE OF HYDROXYALKYLPHENONES AS INITIATORS FOR RADIATION CURING OF AQUEOUS PREPOLYMER DISPERSIONS" ABSTRACT OF THE DISCLOSURE Hydroxyalkylphenones of formula I Image wherein R is hydrogen, halogen, alkyl of 1 to 18 C atoms, alkoxy of 1 to 4 C atoms or Image ; Ra is hydrogen, halogen or alkyl of 1 to 4 C atoms; R1 and R2 (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 Image ; R3 and R4 are each alkyl of 1 to 6 C atoms or together are alkylene of 2 to 8 C atoms and Z is -CO-, -CH2- , -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.

420536

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