Process for preparing waterless printing masters comprising copo

Details Process for preparing waterless printing masters comprising copo Process for preparing waterless printing masters comprising copo

1977-04-04

1978-06-20

Smith, Ronald H.

Coating processes

Solid particles or fibers applied

Localized different areas produced

96 33, 101465, 101467, 427 14, 427374A, 427374B, 427374C, 427375, 427379, 427387, 427388A, 427388R, B05D 504, B05D 106

Patent

active

040962946

ABSTRACT:
A process for preparing a waterless printing master having a minimum background ink reflection density comprises coating a master substrate with an ink releasing block copolymer comprising elastomeric ink releasing siloxane blocks and isothermally crystallizable thermoplastic organic blocks. Thereafter, the thermoplastic blocks are isothermally crystallized and the siloxane blocks are preferably cross-linked. The printing master is imaged by depositing ink accepting particulate imaging material on the copolymer coating and heating and cooling the thermoplastic blocks to bond the particulate imaging material thereto.

REFERENCES:
patent: 3260612 (1966-07-01), Dulmage et al.
patent: 3967962 (1976-07-01), O'Malley
patent: 4009032 (1977-02-01), Schank

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