Cationically polymerizable compositions containing sulfonium sal

Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy

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20415918, 20415924, 525121, 525918, 526193, 528 90, 528361, 528393, 528408, 528418, 427 541, C08F 250, C08G 5968

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active

043069533

ABSTRACT:
Photopolymerizable compositions using sulfonium salt photoinitiators to effect polymerization of cationically polymerizable monomers additionally include a stable free radical to reduce or eliminate the sulfur odor generated upon photodecomposition of the sulfonium salt photoinitiator. The stable free radicals are soluble in the polymerizable material and are stable in the composition at ambient temperatures. Especially useful is 2,2-diphenyl-1-picrylhydrazyl.

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