Photopolymerizable composition with polymeric binder

Claim 2

A photosensitive composition having reduced cold flow comprising (a) addition polymerizable ethylenically unsaturated monomer; (b) an initiating system activatable by actinic radiation; and (c) an organic polymeric binder containing at least two percent by weight of an amphoteric polymer which, is an interpolymer of (1) 30-60 percent by weight of a comonomer selected from the group consisting of C 2-12 N-alkyl acrylamide and C 2-12 N-alkyl methacrylamide, C 1-4 alkyl (C 2-4 ) aminoalkyl acrylates and C 1-4 alkyl (C 2-4 ) aminoalkyl methacrylates, and mixtures thereof; (2) 10-25 percent by weight of an acidic comonomer selected from the group consisting of acrylic, methacrylic, crotonic, itaconic, maleic and fumaric acids and C 1-4 alkyl half esters of maleic and fumaric acid, and mixtures thereof; and (3) 20-55 percent of a copolymerizable comonomer selected from the group consisting of C 1 -C 12 alkyl acrylates, C 1 -C 12 alkyl methacrylates, C 2-4 hydroxyalkyl acrylates, hydroxystearyl acrylate, hydroxyalkyl methacrylates, hydroxystearyl methacrylates and mixtures thereof.

Claim 3

The photosensitive composition of claim 1 in which the interpolymer is the sole polymeric constituent of the binder.

Claim 4

The photosensitive layer of claim 1 in which the interpolymer is prepared from a monomer mix containing 40 parts by weight tertiary-octyl acrylamide, 15 parts by weight acrylic acid, 35 parts by weight methyl methacrylate, 5 parts by weight hydroxypropyl acrylate, and 5 parts by weight of tertiary-butyl aminoethyl methacrylate.

Claim 5

A photoresist element comprising a thin layer of photosensitive composition coated upon a strippable support, the photosensitive composition having reduced cold flow and comprising (a) addition polymerizable ethylenically unsaturated monomer; (b) an initiating system activatable by actinic radiation; and (c) an organic polymeric binder containing at least two percent by weight of an amphoteric polymer which is an interpolymer of (1) 30-60 percent by weight of a comonomer selected from the group consisting of C 2-12 N-alkyl acrylamide and C 2-12 N-alkyl methacrylamide, C 1-4 alkyl (C 2-4 ) aminoalkyl acrylates and C 1-4 alkyl (C 2-4 ) aminoalkyl methacrylates, and mixtures thereof; (2) 10-25 percent by weight of an acidic comonomer selected from the group consisting of acrylic, methacrylic, crotonic, itaconic, maleic and fumaric acids and C 1-4 alkyl half esters of maleic and fumaric acid, and mixtures thereof; and (3) 20-55 percent of a copolymerizable comonomer selected from the group consisting of C 1 -C 12 alkyl acrylates C 1 -C 12 alkyl methacrylates, C 2-4 hydroxyalkyl acrylates, hydroxystearyl acrylate, hydroxyalkyl methacrylates, hydroxystearyl methacrylates, and mixtures thereof.

Claim 6

A photoresist element comprising a thin layer of photosensitive composition coated upon a strippable support, the photosensitive composition having reduced cold flow and comprising (a) addition polymerizable ethylenically unsaturated monomer; (b) an initiating system activatable by actinic radiation; and (c) an organic polymeric binder containing at least two percent by weight of an amphoteric polymer which is an interpolymer of (1) 30-60 percent by weight of a comonomer selected from the group consisting of C 2-12 N-alkyl acrylamide and C 2-12 N-alkyl methacrylamide, C 1-4 alkyl (C 2-4 ) aminoalkyl acrylates and C 1-4 alkyl (C 2-4 ) aminoalkyl methacrylates, and mixtures thereof; (2) 10-25 percent by weight of an acidic comonomer selected from the group consisting of acrylic, methacrylic, crotonic, itaconic, maleic and fumaric acids and C 1-4 alkyl half esters of maleic and fumaric acid, and mixtures thereof; and (3) 20-55 percent of a copolymerizable comonomer selected from the group consisting of C 1 -C 12 alkyl acrylates C 1 -C 12 alkyl methacrylates, C 2-4 hydroxyalkyl acrylates, hydroxystearyl acrylate, hydroxyalkyl methacrylates, hydroxystearyl methacrylates, and mixtures thereof.

Claim 7

The element of claim 4 in which the interpolymer is the sole polymeric constituent of the binder.

Claim 8

The element of claim 4 in which the interpolymer is prepared from a monomer mix containing on a weight basis 40% t-octyl acrylyamide, 15% acrylic acid, 35% methyl methacrylate, 5% hydroxypropyl acrylate, and 5% t-butyl aminoethyl methacrylate.

Claim 9

The element of claim 4 having a protective cover sheet.

Claim 10

A photoresist element in roll form comprising a thin layer of photosensitive composition coated upon a strippable support, the roll being formed with the support outermost, the photosensitive composition having reduced cold flow and comprising (a) addition polymerizable ethylenically unsaturated monomer; (b) an initiating system activatable by actinic radiation; and (c) an organic polymeric binder containing at least two percent by weight of an amphoteric polymer which is an interpolymer of (1) 30-60 percent by weight of a comonomer selected from the group consisting of C 2-12 N-alkyl acrylamide and C 2-12 N-alkyl methacrylamide, C 1-4 alkyl (C 2-4 ) aminoalkyl acrylates and C 1-4 alkyl (C 2-4 ) aminoalkyl methacrylates, and mixtures thereof; (2) 10-25 percent by weight of an acidic comonomer selected from the group consisting of acrylic, methacrylic, crotonic, itaconic, maleic and fumaric acids and C 1-4 alkyl half esters of maleic and fumaric acid, and mixtures thereof; and (3) 20-55 percent of a copolymerizable comonomer selected from the group consisting of C 1 -C 12 alkyl acrylates, C 1 -C 12 alkyl methacrylates, C 2-4 hydroxyalkyl acrylates, hydroxystearyl acrylate, hydroxyalkyl methacrylates, hydroxystearyl methacrylates and mixtures thereof.

Claim 11

A photoresist element in roll form comprising a thin layer of photosensitive composition coated upon a strippable support, the roll being formed with the support outermost, the photosensitive composition having reduced cold flow and comprising (a) addition polymerizable ethylenically unsaturated monomer; (b) an initiating system activatable by actinic radiation; and (c) an organic polymeric binder containing at least two percent by weight of an amphoteric polymer which is an interpolymer of (1) 30-60 percent by weight of a comonomer selected from the group consisting of C 2-12 N-alkyl acrylamide and C 2-12 N-alkyl methacrylamide, C 1-4 alkyl (C 2-4 ) aminoalkyl acrylates and C 1-4 alkyl (C 2-4 ) aminoalkyl methacrylates, and mixtures thereof; (2) 10-25 percent by weight of an acidic comonomer selected from the group consisting of acrylic, methacrylic, crotonic, itaconic, maleic and fumaric acids and C 1-4 alkyl half esters of maleic and fumaric acid, and mixtures thereof; and (3) 20-55 percent of a copolymerizable comonomer selected from the group consisting of C 1 -C 12 alkyl acrylates, C 1 -C 12 alkyl methacrylates, C 2-4 hydroxyalkyl acrylates, hydroxystearyl acrylate, hydroxyalkyl methacrylates, hydroxystearyl methacrylates and mixtures thereof.

Claim 12

The photoresist element of claim 8 having a thin layer of release material coated the reverse side of the strippable support.

Claim 13

The photoresist element of claim 8 having a protective cover sheet.

Claim 14

The photopolymerizable layer of claim 1 in which the interpolymer is prepared from a monomer mix containing by weight 35-45 percent N-tert.-octyl acrylamide, 12-18 percent acrylic acid, methacrylic acid or mixtures thereof, 32-38 percent methyl methacrylate, 2-10 percent hydroxypropyl acrylate and 2-10 percent C 1-4 alkyl C 2-4 aminoalkyl acrylate, methacrylate or mixtures thereof.

Claim 15

The photoresist element of claim 4 in which the interpolymer is prepared from a monomer mix containing by weight 35-45 percent N-tert.-octyl acrylamide, 12-18 percent acrylic acid, methacrylic acid or mixtures thereof, 32-38 percent methyl methacrylate, 2-10 percent hydroxypropyl acrylate and 2-10 percent C 1-4 alkyl C 2-4 aminoalkyl acrylates, methacrylate or mixtures thereof.

Claim 16

The roll form photoresist element of claim 8 in which the interpolymer is prepared from a monomer mix containing by weight 35-45 percent N-tert.-octyl acrylamide, 12-18 percent acrylic acid, methacrylic acid or mixtures thereof, 32-38 percent methyl methacrylate, 2-10 percent hydroxypropyl acrylate and 2-10 percent C 1-4 alkyl C 2-4 aminoalkyl acrylates, methacrylate or mixtures thereof.