Process for making a relief printing plate

Details Process for making a relief printing plate Process for making a relief printing plate

1975-07-16

1976-04-20

Brammer, Jack P.

Gas separation: apparatus

Electric field separation apparatus

Electrode cleaner, apparatus part flusher, discharger, or...

96 33, 96 36, 96 363, 96 87R, 96115R, 96 85, G03C 500, G03C 168, G03C 702, G03C 800

Patent

active

039516571

ABSTRACT:
A photopolymerizable element for the preparation of relief printing plates. The element comprises an addition polymerizable monomer (e.g. trimethylolpropane trimethacrylate), a free radical initiator for polymerizing the monomer (e.g. benzophenone) and a polyester-based polyurethane binding agent which is the reaction product of 4,4'-methylenebis(phenyl isocyanate), a polycaprolactone diol having a molecular weight in the range of 1,000 to 2,500, and a mixture of at least two aliphatic diol extenders. Optionally the photopolymerizable element is provided with a support layer such as a polyester film or paper.
Processes for the preparation of relief printing plates from said elements are also disclosed.

REFERENCES:
patent: 2760863 (1956-08-01), Plumber
patent: 2914556 (1959-11-01), Hostettler et al.
patent: 2948611 (1960-08-01), Barney
patent: 3509102 (1970-04-01), Horn et al.
patent: 3642924 (1972-02-01), Morikawa et al.
patent: 3658531 (1972-04-01), Kurtz
patent: 3681291 (1972-08-01), Khan
patent: 3782961 (1974-01-01), Takahashi et al.
Saunder et al., Polyurethanes, Chemistry and Technology, Part I, 1963, pp. 228-232.

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