公开(公告)号：US20210063877A1

公开(公告)日：2021-03-04

申请号：US16644343

申请日：2018-08-31

Applicant: TOYOBO CO., LTD.

Inventor： Wataru Kawashima ,  Jun Hasuike

IPC: G03F7/037 ,  C08G69/14 ,  G03F7/11 ,  B41N1/12

Abstract: A photosensitive resin composition for a flexographic printing original plate is disclosed which exhibits reduced adhesion of dust, dirt, and paper powder, resistance to UV ink and allows storage of the printing original plate for a long period of time. A water-developable photosensitive resin composition for flexographic printing, contains at least a polyamide and/or a polyamide block copolymer (a), a cross-linking agent having one or more unsaturated group(s) (b), a photo-polymerization initiator (c), and a fatty acid ester (d), wherein the fatty acid ester (d) has two or more hydroxyl groups and 24 or 25 carbon atoms in a molecule, wherein the fatty acid ester (d) is a fatty acid ester of a compound selected from fatty acids having a number of carbon atoms of 12 to 22, and wherein a content of the fatty acid ester (d) in the photosensitive resin composition is 0.2 to 6% by weight.

公开(公告)号：US11656551B2

公开(公告)日：2023-05-23

申请号：US16644343

申请日：2018-08-31

Applicant: TOYOBO CO., LTD.

Inventor： Wataru Kawashima ,  Jun Hasuike

IPC: G03F7/037 ,  B41N1/12 ,  C08G69/14 ,  G03F7/11

CPC classification number: G03F7/037 ,  B41N1/12 ,  C08G69/14 ,  G03F7/11

Abstract: A photosensitive resin composition for a flexographic printing original plate is disclosed which exhibits reduced adhesion of dust, dirt, and paper powder, resistance to UV ink and allows storage of the printing original plate for a long period of time. A water-developable photosensitive resin composition for flexographic printing, contains at least a polyamide and/or a polyamide block copolymer (a), a cross-linking agent having one or more unsaturated group(s) (b), a photo-polymerization initiator (c), and a fatty acid ester (d), wherein the fatty acid ester (d) has two or more hydroxyl groups and 24 or 25 carbon atoms in a molecule, wherein the fatty acid ester (d) is a fatty acid ester of a compound selected from fatty acids having a number of carbon atoms of 12 to 22, and wherein a content of the fatty acid ester (d) in the photosensitive resin composition is 0.2 to 6% by weight.

公开(公告)号：US20210191267A1

公开(公告)日：2021-06-24

申请号：US16078852

申请日：2017-02-16

Applicant: TOYOBO CO., LTD.

Inventor： Wataru Kawashima ,  Jun Hasuike

IPC: G03F7/038 ,  B41N1/12 ,  G03F7/105 ,  G03F7/11 ,  G03F7/028 ,  G03F7/20 ,  C08L77/00

Abstract: A high-quality photosensitive resin composition is disclosed which not only exhibits a reduced adhesion of dust, dirt, and paper powder to a relief and a good resistance to a UV ink but also allows a storage of a printing original plate for a long period of time, even if this plate is a plate in a low hardness to be used for a flexographic printing. A water-developable photosensitive resin composition for flexographic printing contains at least a polyamide and/or a polyamide block copolymer (a), a cross-linking agent having one or more unsaturated group(s) (b), a photo-polymerization initiator (c), and a fatty acid ester (d), wherein the fatty acid ester (d) has two or more hydroxyl groups and 11 to 23 carbon atoms in a molecule, and wherein a content of the fatty acid ester (d) in the photosensitive resin composition is 0.2 to 6% by weight.

公开(公告)号：US20230145446A1

公开(公告)日：2023-05-11

申请号：US17913610

申请日：2021-01-18

Applicant: TOYOBO CO., LTD.

Inventor： Wataru Kawashima

IPC: G03F7/033 ,  G03F7/037 ,  C08G69/40 ,  B41N1/12

CPC classification number: G03F7/033 ,  G03F7/037 ,  C08G69/40 ,  B41N1/12

Abstract: A photosensitive resin printing original plate for letterpress printing having a photosensitive resin layer formed of a photosensitive resin composition containing at least a polymer compound (A), a dibasic acid diester (B) represented by the following general formula (I), a photopolymerizable compound (C), and a photopolymerization initiator (D), in which the content of the dibasic acid diester (B) in the photosensitive resin composition is 2.5 to 15 mass %:






(where R1 represents a divalent aliphatic hydrocarbon group having 2 to 8 carbon atoms, a divalent aromatic hydrocarbon group having 6 to 14 carbon atoms, or a divalent aliphatic cyclic hydrocarbon group having 4 to 14 carbon atoms, and R2 and R3 may be the same as or different from each other and each represents a linear or branched aliphatic hydrocarbon group having 1 to 12 carbon atoms).