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

1981-03-12

1983-06-28

Garvin, Patrick

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

20415918, B01J 3102

Patent

active

043904530

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), Rorden
patent: 3222429 (1965-12-01), Boyd et al.
patent: 3857769 (1974-12-01), McGinniss
patent: 3907656 (1975-09-01), de Souza
patent: 3933682 (1976-01-01), Bean
patent: 4024296 (1977-05-01), Gruber
patent: 4101558 (1979-07-01), Vacek et al.
patent: 4131529 (1979-12-01), Osterloh et al.
J. Oil Col. Chem. Assoc., 1978, 61, 256-263.

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