Carbamated poly(vinyl alcohol) useful as a binder in elastomeric photopolymer compositions
First Claim
1. A carbamated poly(vinyl alcohol) which comprises 15 to 100 mole percent of recurring units having the formula ##STR10## wherein R is NH2 in some recurring units and at least one of OR1 and NHR1 in the remaining recurring units, wherein the units which contain OR1 and NHR1 are derived by reaction of said units wherein R is NH2 with R1 OH, R1 OH being an alcohol which has a boiling point of greater than 100°
- C. at normal atmospheric pressure, with the proviso that said alcohol is compatible with said carbamated poly(vinyl alcohol), and the ratio of (OR1 +NHR1)/NH2 is within the range of 0.05 to 1.0, and 0 to 85 mole percent of recurring units having a formula selected from the group consisting of ##STR11## with the proviso that no more than 12 mole percent of the recurring units have the formula ##STR12##
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Abstract
Flexographic printing plates are prepared from photosensitive elastomeric compositions which comprise
(1) about 15 to about 89 percent by weight of a carbamated poly(vinyl alcohol) polymeric binder,
(2) about 10 to about 70 percent by weight of a compatible monomer, and
(3) about 0.1 to about 10 percent by weight of a free-radical generating system.
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Citations
2 Claims
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1. A carbamated poly(vinyl alcohol) which comprises 15 to 100 mole percent of recurring units having the formula ##STR10## wherein R is NH2 in some recurring units and at least one of OR1 and NHR1 in the remaining recurring units, wherein the units which contain OR1 and NHR1 are derived by reaction of said units wherein R is NH2 with R1 OH, R1 OH being an alcohol which has a boiling point of greater than 100°
- C. at normal atmospheric pressure, with the proviso that said alcohol is compatible with said carbamated poly(vinyl alcohol), and the ratio of (OR1 +NHR1)/NH2 is within the range of 0.05 to 1.0, and 0 to 85 mole percent of recurring units having a formula selected from the group consisting of ##STR11## with the proviso that no more than 12 mole percent of the recurring units have the formula ##STR12##
- View Dependent Claims (2)
Specification