6-acyl-(6H)-dibenz[c,e][1,2]oxaphosphorin 6-oxides, their prepar

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Compositions to be polymerized by wave energy wherein said...


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522 16, 522 63, 522 64, 522 81, 430281, 430282, 430285, 430286, 430288, C07F 932, C09D 3727, C08F 250, G03F 7004




The invention relates 6-acyl-(6H)-dibenz[c,e][1,2]oxaphosphorine-6-oxides of the formula ##STR1## wherein each of R.sup.1, R.sup.2 and R.sup.3 may be present one or more times and R.sup.1, R.sup.2 and R.sup.3 represent halogen having an atomic number of from 9 to 35, alkyl or alkoxy each having from 1 to 6 carbon atoms and wherein Ar represents an aromatic hydrocarbon group having from 6 to 10 carbon atoms.
The invention further relates to a process for the preparation of the afore-mentioned compounds and polymerizable compositions containing them as an essential ingredient as a photo-initiator. Finally the invention relates to 6-alkoxy-(6H)-dibenz[c,e][1,2]oxaphosphorin of the formula II ##STR2## wherein each of R.sup.1 and R.sup.2 may be present once or more times and R.sup.1 and R.sup.2 represent halogen having an atomic number of from 9 to 35, alkyl or alkoxy each having from 1 to 6 carbom atoms, at least one R.sup.1 being, however, halogen, and wherein R.sup.4 represents alkyl having from 1 to 6 carbon atoms.

patent: 4292152 (1981-09-01), Lechtken et al.
patent: 4447520 (1984-05-01), Henne et al.


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