Thermographic processes and elements utilizing photocrosslinkable polyesters

Claim 2

The process of claim 1 wherein the light-sensitive composition is sensitized with a thiapyrylium salt.

Claim 3

The process of claim 1 wherein the dicarboxylic acid moiety containing the grouping is derived from a dicarboxylic acid selected from the group consisting of p-phenylene diacrylic acid and fumaric acid.

Claim 4

The process of claim 1 wherein the dihydric alcohol moiety is derived from an alcohol having the formula HO-R-OH wherein R is a divalent organic radical having 2 to 12 carbon atoms selected from the group consisting of hydrocarbon radicals, -alkylene-O-alkylene- radicals and -alkylene-O-cyclohexane-O-alkylene-radicals.

Claim 5

The process of claim 1 wherein the dihydric alcohol moiety is derived from an alcohol having the formula HO-R-OH wherein R is an alkylene radical having 2 to 12 carbon atoms, the dicarboxylic acid moiety containing the grouping is derived from p-phenylene diacrylic acid and the remainder of the dicarboxylic acid moieties is derived from a dicarboxylic acid having the formula wherein R'' is selected from the group consisting of alkylene radicals having 2 to 12 carbon atoms and phenylene radicals.

Claim 6

The process of claim 1 wherein the dihydric alcohol moiety is derived from an alcohol selected from the group consisting of 1, 4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,9-nonanediol, diethylene glycol, 1,4-di- Beta -hydroxyethoxycyclohexane, neopentylglycol, and 1,4-cyclohexanedimethanol.

Claim 7

A photothermographic process which comprises imagewise exposing to actinic radiation a layer of a light-sensitive polyester composition on a photographic support and raising the tackifying temperature of exposed areas, heating the said exposed layer to selectively render unexposed areas tacky, and thereafter transferring the said tackified unexposed areas to a second support; said light-sensitive polyester composition comprising a photocrosslinkable polyester and having a tackifying temperature of about 50* C. to 200* C., a glass transition temperature of less than about 30* C., and a crystallinity of about 10 to 80 percent as determinEd by X-ray diffraction, said polyester containing as recurring units: a. 50 mole percent of at least one dihydric alcohol moiety derived from an alcohol having the formula HO-R-OH wherein R is a divalent organic radical having 2 to 12 carbon atoms selected from the group consisting of hydrocarbon radicals, -alkylene-O-alkylene- radicals and -alkylene-O-cyclohexane-O-alkylene-radicals, and b. 50 mole percent of at least two dicarboxylic acid moieties esterified with said dihydric alcohol moiety, about 5 to 45 mole percent of said dicarboxylic acid moieties being derived from a dicarboxylic acid selected from the group consisting of p-phenylene diacrylic acid and fumaric acid, and the remainder of said dicarboxylic acid moieties being derived from a dicarboxylic acid having the formula wherein R'' is a divalent hydrocarbon radical having 2 to 12 carbon atoms.

Claim 8

A photographic element comprising a support having coated thereon a layer of a light-sensitive polyester composition comprising a photocrosslinkable polyester and having a tackifying temperature of about 50* C. to 200* C., a glass transition temperature of less than about 30* C., and a crystallinity of about 10 to 80 percent as determined by X-ray diffraction, said polyester containing as recurring units: a. 50 mole percent of at least one dihydric alcohol moiety, and b. 50 mole percent of at least two dicarboxylic acid moieties esterified with said dihydric alcohol moiety, about 5 to 45 mole percent of said dicarboxylic acid moieties containing as an integral portion a grouping.

Claim 9

A photographic element as described in claim 9 wherein the support is a transparent film.

Claim 10

A photographic element as described in claim 9 wherein the light-sensitive composition contains a colorant.

Claim 11

A photographic element as described in claim 9 wherein the light-sensitive composition is sensitized with a thiapyrylium salt.

Claim 12

A photographic element as described in claim 9 wherein the dihydric alcohol moiety is derived from an alcohol having the formula HO-R-OH wherein R is a divalent organic radical having 2 to 12 carbon atoms selected from the group consisting of hydrocarbon radicals, -alkylene-O-alkylene- radicals and -alkylene-O-cyclohexane-O-alkylene- radicals.

Claim 13

A photographic element as described in claim 9 wherein the dihydric alcohol moiety is derived from an alcohol having the formula HO-R-OH wherein R is an alkylene radical having 2 to 12 carbon atoms, the dicarboxylic acid moiety containing the grouping is derived from p-phenylene diacrylic acid and the remainder of the dicarboxylic acid moieties is derived from a dicarboxylic acid having the formula wherein R'' is selected from the group consisting of alkylene radicals having 2 to 12 carbon atoms and phenylene radicals.

Claim 14

A photographic element as described in claim 9 wherein the dihydric alcohol moiety is derived from an alcohol selected from the group consisting of 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,9-nonanediol, diethylene glycol, 1,4di- Beta -hydroxyethoxycyclohexane, neopentylglycol, and 1,4-cyclohexanedimethanol.

Claim 15

A photographic element comprising a support having coated thereon a layer of a light-sensitive polyester composition comprising a photocrosslinkable polyester and having a tackifying temperature of about 50* C. to 200* C., a glass transition temperature of less than about 30* C., and a crystallinity of about 10 to 80 percent as determined by X-ray diffraction, said polyester containing as recurring units: a. 50 mole percent of at least one dihydric alcohol moiety derived from an alcohol haviNg the formula HO-R-OH wherein R is a divalent organic radical having 2 to 12 carbon atoms selected from the group consisting of hydrocarbon radicals, -alkylene-O-alkylene- radicals and -alkylene-O-cyclohexane-O-alkylene-radicals, and b. 50 mole percent of at least two dicarboxylic acid moieties esterified with said dihydric alcohol moiety, about 5 to 45 mole percent of said dicarboxylic acid moieties being derived from a dicarboxylic acid selected from the group consisting of p-phenylene diacrylic acid and fumaric acid, and the remainder of said dicarboxylic acid moieties being derived from a dicarboxylic acid having the formula wherein R'' is a divalent hydrocarbon radical having 2 to 12 carbon atoms.

Claim 16

A photothermographic process which comprises imagewise exposing to actinic radiation an opaque layer of a light-sensitive polyester composition on a transparent photographic support, and thereafter heating the said exposed layer to clarify unexposed areas while retaining exposed areas in opaque form, said light-sensitive polyester composition comprising a photocrosslinkable polyester and having a tackifying temperature of about 50* C. to 200 C., a glass transition temperature of less than about 30* C. and a crystallinity of about 10 to 80 percent as determined by X-ray diffraction, said polyester containing as recurring units: a. 50 mole percent of at least one dihydric alcohol moiety, and b. 50 mole percent of at least two dicarboxylic acid moieties esterified with said dihydric alcohol moiety, about 5 to 45 mole percent of said dicarboxylic acid moieties containing as an integral portion a grouping.

Claim 17

A process which comprises imagewise exposing to actinic radiation a transparent layer of a light-sensitive polyester composition on a transparent photographic support, and treating said exposed layer with a solvent to cause crystallization to occur in unexposed areas to render said unexposed areas opaque while retaining exposed image areas in transparent form; said light-sensitive polyester composition comprising a photocrosslinkable polyester and having a tackifying temperature of about 50* C. to 200* C., a glass transition temperature of less than about 30* C., and a crystallinity of about 10 to 80 percent as determined by X-ray diffraction, said polyester containing as recurring units: a. 50 mole percent of at least one dihydric alcohol moiety, and b. 50 mole percent of at least two dicarboxylic acid moieties esterified with said dihydric alcohol moiety, about 5 to 45 mole percent of said dicarboxylic acid moieties containing as an integral portion a grouping.

Claim 18

The process of claim 18 wherein the transparent coating is prepared by coating from a chlorinated hydrocarbon solvent.

Claim 19

The process of claim 18 wherein the solvent used to cause crystallization in the unexposed areas is methyl ethyl ketone.