Coating composition comprising photoactivator and film-forming organic material for powder development

Claim 2

A storage stable coating composition suitable for the preparation of a solid, positive-acting, light-sensitive organic layer capable of developing a Rdp of 0.2 to 2.2 at room temperature by physically embedding a monolayer of powder particles comprising a liquid vehicle, a film-forming organic material containing no conjugated terminal ethylenic unsaturation and a photoactivator capable of producing free radicals, wherein said film-forming organic material is present in a concentration of from 0.1 to 50 grams per 100 ml. of liquid vehicle and said photoactivator comprises at least 5 parts by weight per each 100 parts by weight film-forming organic material.

Claim 3

The composition of claim 1, wherein said coating composition is suitable for the preparation of a positive-acting solid, light-sensitive organic layer capable of developing a Rdp of at least 0.4 at room temperature.

Claim 4

The composition of claim 2, wherein said film forming organic material comprises an internally ethylenically unsaturated acid.

Claim 5

The composition of claim 3, wherein said film forming organic material comprises a partially hydrogenated rosin acid.

Claim 6

The composition of claim 2, wherein said film forming organic material comprises an ester of an internally ethylenically unsaturated acid.

Claim 7

The composition of claim 5, wherein said ester comprises a partially hydrogenated rosin ester.

Claim 8

The composition of claim 5, wherein said ester comprises a phosphatide.

Claim 9

The composition of claim 2, wherein said film forming organic material comprises a polymer of an ethylenically unsaturated monomer.

Claim 10

The composition of claim 2, wherein said film forming organic material comprises a coal tar resin.

Claim 11

The composition of claim 2, wherein said film forming organic material comprises a halogenated hydrocarbon.

Claim 12

A storage stable coating composition suitable for the preparation of a solid, positive-acting, light-sensitive organic layer capable of developing a Rdp of 0.2 to 2.2 at room temperature by physically embedding a monolayer of powder particles comprising a liquid vehicle, a film-forming organic material containing no conjugated terminal ethylenic unsaturation and a photoactivator capable of producing free radicals selected from the group consisting of acyloins and vicinal diketones, wherein said film-forming organic material is present in a concentration of from 0.1 to 50 grams per 100 ml. of liquid vehicle and said photoactivator comprises at least 5 parts by weight per each 100 parts by weight film-forming organic material.

Claim 13

A storage stable coating composition suitable for the preparation of a solid, positive-acting, light-sensitive organic layer capable of developing a Rdp of 0.2 to 2.2 at room temperature by physically embedding a monolayer of powder particles comprising a liquid vehicle, a film-forming organic material containing no conjugated terminal ethylenic unsaturation and a photoactivator capable of producing free radicals selected from the group consisting of acyloins and vicinal diketones, wherein said film-forming organic material is present in a concentration of from 0.1 to 50 grams per 100 ml. of liquid vehicle and said photoactivator comprises at least 5 parts by weight per each 100 parts by weight film-forming organic material.

Claim 14

The composition of claim 11, wherein said film forming organic material comprises an internally ethylenically unsaturated acid.

Claim 15

The composition of claim 12, wherein said film forming organic material comprises a partially hydrogenated rosin acid.

Claim 16

The composition of claim 11, wherein said film forming organic material comprises an ester of an internally ethylenically unsaturated acid.

Claim 17

The composition of claim 14, wherein said ester comprises a partially hydrogeNated rosin ester.

Claim 18

The composition of claim 14, wherein said ester comprises a phosphatide.

Claim 19

The composition of claim 11, wherein said film forming organic material comprises a polymer of an ethylenically unsaturated monomer.

Claim 20

The composition of claim 11, wherein said film forming organic material comprises a coal tar resin.

Claim 21

The composition of claim 11, wherein said film forming organic material comprises a halogenated hydrocarbon.

Claim 22

A storage stable coating composition suitable for the preparation of a solid, positive-acting, light-sensitive organic layer capable of developing a Rdp of 0.2 to 2.2 by physically embedding a monolayer of powder particles comprising a film-forming organic material containing no conjugated terminal ethylenic unsaturation, a photoactivator capable of producing free radicals and a liquid vehicle selected from the group consisting of hydrocarbons and halohydrocarbons, wherein said film-forming organic material is present in a concentration of 0.1 to 50 grams per 100 ml. of liquid vehicle and said photoactivator comprises at least 5 parts by weight per each 100 parts by weight film-forming organic material.

Claim 23

A storage stable coating composition suitable for the preparation of a solid, positive-acting, light-sensitive organic layer capable of developing a Rdp of 0.2 to 2.2 by physically embedding a monolayer of powder particles comprising a film-forming organic material containing no conjugated terminal ethylenic unsaturation, a photoactivator capable of producing free radicals and a liquid vehicle selected from the group consisting of hydrocarbons and halohydrocarbons, wherein said film-forming organic material is present in a concentration of 0.1 to 50 grams per 100 ml. of liquid vehicle and said photoactivator comprises at least 5 parts by weight per each 100 parts by weight film-forming organic material.

Claim 24

The composition of claim 20, wherein said solid, light-sensitive organic layer is positive-acting, said photoactivator is selected from the group consisting of acyloins and vicinal diketones and said photoactivator is present in a plasticizing concentration sufficient to provide a light-sensitive organic layer capable of developing a Rdp of at least 0.4 at room temperature.

Claim 25

The composition of claim 21, wherein said photoactivator comprises benzil.

Claim 26

The composition of claim 21, wherein said photoactivator comprises benzoin.

Claim 27

The composition of claim 20, wherein said liquid vehicle comprises 1,1,1-trichloroethane.

Claim 28

The composition of claim 20, wherein said solid, film forming organic material comprises an internally ethylenically unsaturated acid.

Claim 29

The composition of claim 25, wherein said film forming organic material comprises a partially hydrogenated rosin acid in a concentration of about 0.4 to 3 grams per 100 ml. of vehicle.

Claim 30

The composition of claim 20, wherein said solid film forming organic material comprises an ester of an internally ethylenically unsaturated acid.

Claim 31

The composition of claim 27, wherein said ester comprises a partially hydrogenated rosin ester in a concentration of about 0.4 to 3 grams per 100 ml. of liquid vehicle.

Claim 32

The composition of claim 27, wherein said ester comprises a phosphatide in a concentration of about 2 to 20 grams per 100 ml. of vehicle.

Claim 33

The composition of claim 29, wherein said photoactivator comprises ferric chloride.

Claim 34

The composition of claim 21, wherein said composition comprises an aminocoumarin superphotoactivator.

Claim 35

A storage stable coating composition suitable for the preparation of a solid, positive-acting, light-sensitive organic layer capable of developing a Rdp of 0.4 to 2.2 at room temperature by physically embedding a monolayer of powder particles comprising 1,1,1-trichloroethane, a photoactivator capable of producing free radicals and a film-forming organic material selected from the group consisting of rosin acids, hydrogenated rosin acids, rosin acid esters and hydrogenated rosin acid esters, wherein said film-forming organic material comprises from about 0.4 to 3 grams per 100 ml. of 1,1,1-trichloroethane and said photoactivator comprises at least 5 parts by weight per each 100 parts by weight film-forming organic material.

Claim 36

A storage stable coating composition suitable for the preparation of a solid, positive-acting, light-sensitive organic layer capable of developing a Rdp of 0.4 to 2.2 at room temperature by physically embedding a monolayer of powder particles comprising 1,1,1-trichloroethane, a photoactivator capable of producing free radicals and a film-forming organic material selected from the group consisting of rosin acids, hydrogenated rosin acids, rosin acid esters and hydrogenated rosin acid esters, wherein said film-forming organic material comprises from about 0.4 to 3 grams per 100 ml. of 1,1,1-trichloroethane and said photoactivator comprises at least 5 parts by weight per each 100 parts by weight film-forming organic material.

Claim 37

The composition of claim 32, wherein said photoactivator comprises benzil.

Claim 38

The composition of claim 32, wherein said composition comprises an aminocoumarin superphotoactivator.