Method of polymerizing ethylenically unsaturated materials by ir

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

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96115P, 20415918, 20415923, 20415924, 260 775CR, 260859R, 260861, 260864, 260865, 260872, 526260, 526312, 526321, 526328, 526330, 526341, 260 47UA, 526346, C08F 800, C08F 246

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active

039740536

ABSTRACT:
Photopolymerizable compositions consisting essentially of at least one polymerizable ethylenically unsaturated material and a photosensitive catalyst comprising
A. from 0.5% to 5% by weight based on the ethylenically unsaturated material of at least one photosensitizer having the structure ##EQU1## wherein Ph is phenyl, halogen-substituted phenyl, phenylene or halogen-substituted phenylene and A is a cyclic hydrocarbyl group, a halogen-substituted cyclic hydrocarbyl group or a group of the formula ##EQU2## where X and Y each is hydrogen, a hydrocarbyl or a halogen-substituted hydrocarbyl group, and
B. from 1 to 5% by weight based on the ethylenically unsaturated material of a reducing agent capable of reducing the photosensitizer when the photosensitizer is in an excited state.
Also described is a process of preparing polymeric materials by irradiating the foregoing polymerizable composition at a wavelength capable of exciting the photosensitizer to an excited state.

REFERENCES:
patent: 3625744 (1971-12-01), Juna et al.
patent: 3637382 (1972-01-25), Krauch
patent: 3682642 (1972-08-01), Loridon et al.
patent: 3726677 (1973-04-01), Hepher et al.

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