Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1974-11-19
1976-08-10
Turer, Richard B.
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
96115P, 20415918, 20415923, 20415924, 260 775CR, 260859R, 260861, 260864, 260865, 260872, 526260, 526312, 526321, 526328, 526330, 526341, 260 47UA, 526346, C08F 800, C08F 246
Patent
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.
Heap Nicholas
Nemcek Josef
Imperial Chemical Industries Limited
Turer Richard B.
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