Photosensitive and heat-sensitive polymers, process for producin

Details Photosensitive and heat-sensitive polymers, process for producin Photosensitive and heat-sensitive polymers, process for producin

1988-03-22

1990-10-23

McCamish, Marion C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525344, 525353, 526287, 430290, 430300, C08C 1970, C08F 836, C08F 3604

Patent

active

049653229

ABSTRACT:
A photosensitive and heat-sensitive polymer having conjugated polyenes and sulfonic acid groups and an absorbance ratio of a strong band in the region of 1200 cm.sup.-1 to 1300 cm.sup.-1 assignable to sulfonic acid groups adjacent to conjugated polyenes of at least 3 sequence lengths to a strong band near 1050 cm.sup.-1 assignable to sulfonic acid groups in the IR spectrum of at least 0.6. The photosensitive and heat-sensitive polymer is obtained by the sulfonation of a polymer of an ethylenically unsaturated monomer having a number average molecular weight of at least 10,000 or a polymer having conjugated polyenes and a number average molecular weight of at least 10,000 and selected from specified polymers and copolymers. The photosensitive and heat-sensitive polymer is useful for information recording materials capable of being recorded by a laser beam or a thermal head for preparing printing plates, especially offset printing plates.

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