Mixtures of aromatic-aliphatic ketones as photoinitiators and ph

Details Mixtures of aromatic-aliphatic ketones as photoinitiators and ph Mixtures of aromatic-aliphatic ketones as photoinitiators and ph

1983-04-04

1984-02-28

Bleutge, John C.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

20415915, 20415918, 20415919, 20415923, 430281, 430919, 430922, 430923, C08F 250

Patent

active

044340354

ABSTRACT:
Mixtures containing at least one hydroxyalkylphenone of the formula ##STR1## wherein R.sup.1 is H, alkyl of 1-4 C atoms or chlorine, R.sup.2 is H or methyl, R.sup.3 is H or methyl, R.sup.4 is alkyl of 1-6 C atoms and R.sup.5 is alkyl of 1-6 C atoms, and at least one 2-alkylthioxanthone of the formula ##STR2## wherein R.sup.6 is alkyl of 1-8 C atoms, have a considerably increased reactivity in initiating the photopolymerization of ethylenically unsaturated compounds. The polymers fully hardened using these initiator mixtures suffer only little yellowing.

REFERENCES:
patent: 3169868 (1965-02-01), Borden
patent: 3759807 (1973-09-01), Osborn et al.
patent: 3907656 (1975-09-01), de Souza
patent: 4101558 (1978-07-01), Vacek et at.
patent: 4347111 (1982-08-01), Gehlhaus et al.
patent: 4379039 (1983-04-01), Fujimoto et al.
Davis "The U.V. Curing Behavior . . . " Journal of the Oil Color Chemists Assn., 61, (1978) pp. 256-263.

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