Light-sensitive composition

Claim 2

A light-sensitive composition which comprises a diazo resin, a polymeric binder, and at least one compound having at least one structural unit selected from the group consisting of ureido bond, thioureido bond, urethane bond and thiourethane bond.

Claim 3

A light-sensitive composition of claim 1 wherein the compound is at least one member selected from the group consisting of those represented by the following general formulas (1) to (4): wherein R₁ to R₄ may be the same or different and each represents a hydrogen atom, a substituted or unsubstituted alkyl, a substituted or unsubstituted aryl, a substituted or unsubstituted aralkyl, a substituted or unsubstituted alkenyl, a substituted or unsubstituted acyl or a substituted or unsubstituted amino group or may be bonded together to form a ring structure.

Claim 4

A light-sensitive composition of claim 2 wherein R₁ to R₄ each represents a group selected from the group consisting of methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, sec-butyl, tert-butyl, pentyl, hexyl, heptyl, octyl, 2-ethylhexyl, nonyl, decyl, lauryl, stearyl, behenyl, cyclopentyl, cyclohexyl, 2-hydroxyethyl, 2-­ hydroxypropyl, 3-hydroxypropyl, 2-methoxyethyl, 2-ethoxyethyl, 3-­methoxypropyl, 3-ethoxypropyl, 2,3-dichloropropyl, 2,3-dibromopropyl, -CH₂COOH, -CH(COOH)-CH₂-COOH, -CH₂CH₂COOH, -CH₂CH₂SO₃Na, -CH₂CH₂SO₃K, phenyl, naphthyl, tolyl, xylyl, fluorophenyl, chlorophenyl, bromophenyl, ethylphenyl, propylphenyl, hydroxyphenyl, methoxyphenyl, ethoxyphenyl, -Phe-SO₃Na, -Phe-SO₃K, -Phe-NHNHCHO (Phe means a phenylene group), benzyl, methylbenzyl, dimethylbenzyl, ethylbenzyl, propylbenzyl, fluorobenzyl, chlorobenzyl, bromobenzyl, hydroxybenzyl, methoxybenzyl, ethoxybenzyl, vinyl, propenyl, butenyl, allyl, -CO-CH₃, -CO-C₂H₅, -CO-OH, -CO-OCH₃, -CO-OC₂H₅,-CO-NH₂, -CO-COOH, -CO-CH₂COOH, -NH₂, -NHCH₃, -N(CH₃)₂, -NH-Ph and -N(Ph)₂ (Ph means a phenyl group).

Claim 5

A light-sensitive composition of claim 1 wherein the compound is at least one member selected from the group consisting of those represented by the following formulas: wherein R₁ and R₂ have the same meanings as defined above.

Claim 6

A light-sensitive composition of claim 1 wherein the molecular weight of the compound is less than 20,000.

Claim 7

A light-sensitive composition of claim 5 wherein the molecular weight of the compound is less than 5,000.

Claim 8

A light-sensitive composition of claim 1 wherein the amount of the compound added to the composition ranges from 1 to 25% by weight on the basis of the weight of the polymeric binder.

Claim 9

A light-sensitive composition of claim 7 wherein the amount of the compound in the composition ranges from 2 to 20% by weight on the basis of the weight of the polymeric binder.

Claim 10

A light-sensitive composition of claim 7 wherein the amount of the diazo resin ranges from 3 to 40% by weight and that of the polymeric binder ranges from 97 to 60% by weight on the basis of the total weight of these two components.

Claim 11

A light sensitive composition of claim 7 wherein the amount of the diazo resin ranges from 5 to 30% by weight and that of the polymeric binder ranges from 95 to 70% by weight on the basis of the total weight of these two components.

Claim 12

A light-sensitive composition of claim 1 wherein it further comprises at least one additive selected from the group consisting of alkyl ethers, surfactants, plasticizers, dyes or pigments and stabilizers for the diazo resin.

Claim 13

A light-sensitive composition of claim 11 wherein the amount of the additive ranges from 0.5 to 30% by weight on the basis of the total solid content of the composition.

Claim 14

A light-sensitive composition of claim 1 wherein the polymeric binder is a member selected from the group consisting of copolymers comprising, as essential components, repeating units derived from acrylic acid, methacrylic acid, crotonic acid or maleic acid; polyurethane resins; acidic polyvinyl alcohol derivatives; acidic cellulose derivatives; and polyvinylacetal made alkaline-soluble.

Claim 15

A light-sensitive composition of claim 13 wherein the polymeric binder is a polyurethane resin.