Sensitizers for photocrosslinkable polymers
AssigneeEastman Kodak Company
InventorsJames Albert Van Allan, Michael Paul Cunningham, Donald Paul Specht, Samir Yacoub Farid
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Abstract
Merocyanine dyes comprising 2-(heterocyclylcarbonylmethylene)thiazolines and selenazolines and 2-[di(heterocyclylcarbonyl)methylene]thiazolines and selenazolines are efficient sensitizers for light-sensitive unsaturated materials such as unsaturated vesiculators which release a gas upon exposure to radiation, photocrosslinkable unsaturated polymers, and azides such as photocrosslinkable polymeric azides used in photomechanical resists and lithographic plates.
Claims26
A photosensitive composition comprising a light-sensitive material selected from nonpolymeric compounds having ethylenic unsaturation and polymers containing in the backbone or in pendant groups, moieties that have ethylenic unsaturation;
- and a sensitizing amount of a sensitizer of the following formula:
- ##STR46## wherein X is a sulfur or a selenium atom;
- R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent hydrogen, lower alkoxy of 1 to 4 carbon atoms or taken together R.sup.1 and R.sup.2, R.sup.2 and R.sup.3, R.sup.3 and R.sup.4 constitute the atoms needed to complete a fused benzo ring;
- R.sup.5 represents lower alkyl of 1 to 4 carbon atoms;
- R.sup.6 represents ##STR47## where R.sup.8 is a heterocyclic group such as furyl or thienyl;
- R.sup.7 is heterocyclyl such as furyl or thienyl.
A photosensitive composition comprising
- a light-sensitive material selected from nonpolymeric compounds having ethylenic unsaturation and polymers containing in the backbone or in pendant groups, moieties that have ethylenic unsaturation;
- and a sensitizing amount of a 2-[di(heterocyclylcarbonyl)-methylene]thiazoline or selenazoline having its absorptive maximum between about 340 and about 460 nm.
A photographic element comprising a support having thereon a photosensitive composition comprising a light-sensitive material selected from nonpolymeric compounds having ethylenic unsaturation and polymers containing in the backbone or in pendant groups, moieties that have ethylenic unsaturation;
- and a sensitizing amount of a sensitizer of the following formula:
- ##STR50## wherein X is a sulfur or a selenium atom;
- R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent hydrogen, lower alkoxy of 1 to 4 carbon atoms or taken together R.sup.1 and R.sup.2, R.sup.2 and R.sup.3, R.sup.3 and R.sup.4 constitute the atoms needed to complete a fused benzo ring;
- R.sup.5 represents lower alkyl or 1 to 4 carbon atoms;
- R.sup.6 represents ##STR51## where R.sup.8 is a heterocyclic group such as furyl or thienyl;
- R.sup.7 is heterocyclyl such as furyl or thienyl.
An element of claim 21 in which said sensitizer is 2-[bis(2-furoyl)methylene]-1-methylnaphtho[1,2-d]thiazoline.
A photographic element comprising a support having thereon a photosensitive composition comprising a light-sensitive material selected from nonpolymeric compounds having ethylenic unsaturation and polymers containing in the backbone or in pendant groups, moieties that have ethylenic unsaturation;
- and a 2-[di(heterocyclylcarbonyl)methylene]thiazoline or selenazoline having its absorptive maximum between about 340 to about 460 nm.
A photosensitive composition comprising an unsaturated polyester and a sensitizing amount of a 2-(heterocyclylcarbonylmethylene)thiazoline having its absorptive maximum between about 340 and about 460 nm.
A photographic element comprising a support having thereon a photosensitive composition comprising an unsaturated polyester and a sensitizing amount of a 2-(heterocyclylcarbonylmethylene)thiazoline having its absorptive maximum between about 340 and about 460 nm.
A photographic element comprising a support having thereon a photosensitive composition comprising an unsaturated polyester and a sensitizing amount of a sensitizer of the following formula:
- ##STR52## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent hydrogen, lower alkoxy of 1 to 4 carbon atoms or taken together R.sup.1 and R.sup.2, R.sup.2 and R.sup.3, R.sup.3 and R.sup.4 constitute the atoms needed to complete a fused benzo ring;
- R.sup.5 represents lower akyl of 1 to 4 carbon atoms;
- and R.sup.7 is heterocyclyl such as furyl or thienyl.
An element of cliam 24 in which said sensitizer is 2-[(2-thenoyl)methylene]benzothiazoline.
A photosensitive composition comprising an unsaturated polyester and a sensitizing amount of a sensitizer of the following formula:
- ##STR53## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent hydrogen, lower alkoxy of 1 to 4 carbon atoms or taken together R.sup.1 and R.sup.2, R.sup.2 and R.sup.3, R.sup.3 and R.sup.4 constitute the atoms needed to complete a fused benzo ring;
- R.sup.5 represents lower alkyl of 1 to 4 carbon atoms;
- and R.sup.7 is heterocyclyl such as furyl or thienyl.
Dependencies are inferred from the claim text.