Resin composition and thermo/photosensitive composition

1. A resin composition, comprising:

a polymer compound A that has, through a linkage group containing a hydrogen-bonding group and a ring structure, a terminal ethylenic unsaturated bond on a side chain, and is soluble or swells in water or an alkali aqueous solution; and

a compound B that generates a radical when exposed to light or heat;

wherein the ring structure in the linkage group in the polymer compound A is a heterocyclic group which has 3 to 20 carbon atoms; and

the terminal ethylenic unsaturated bond on a side chain does not contain a phenyl group substituted by a vinyl group.

2. A resin composition, comprising:

a polymer compound A that has, through a linkage group containing a hydrogen-bonding group and a ring structure, a terminal ethylenic unsaturated bond on a side chain, and is soluble or swells in water or an alkali aqueous solution; and

a compound B that generates a radical when exposed to light or heat;

wherein the terminal ethylenic unsaturated bond on a side chain does not contain a phenyl group substituted by a vinyl group; and

wherein the linkage group is represented by the following formula (c), and has the ethylenic unsaturated bond as a substituent on the ring structure:

3. The resin composition according to claim 2 , wherein the ring structure in the linkage group in the polymer compound A has 3 to 20 carbon atoms.

4. The resin composition according to claim 2 , wherein a glass transition temperature of the polymer compound A is 60° C. or more.

5. The resin composition according to claim 2 , wherein a content of the ethylenic unsaturated group in the polymer compound A is 1.5 meq/g or more per gram of the polymer compound A.

6. The resin composition according to claim 2 , wherein a weight average molecular weight of the polymer compound A is 6000 or more.

7. The resin composition according to claim 2 , wherein an acid value of the polymer compound A ranges from 0.5 to 30 meq/g.

8. A thermo/photosensitive composition, comprising:

a polymer compound A′ and a compound B that generates a radical when exposed to light or heat;

wherein the polymer compound A′ comprises a radical-polymerizing compound represented by the formula (C-A) as a polymer unit of polymer compound A′;

wherein in formula (C-A), X represents a hydrogen atom or a methyl group; Y represents an oxygen atom, or a N—W; W represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms that may have a substituent; and Z represents a group having a non-acidic hydrogen-bonding group having a nitrile group;

wherein the radical-polymerizing compound is selected from (meth)acrylic acid esters having an aromatic group and a nitrile group or (meth)acrylamides having an aromatic group and a nitrile group and

wherein the polymer compound A′ comprises an ethylenic unsaturated bond on a side chain.

9. The thermo/photosensitive composition according to claim 8 , further comprising:

a sensitizing dye; and

another radical polymerizing compound.

10. The thermo/photosensitive composition according to claim 8 , wherein a content of a structure unit that has the non-acidic hydrogen-bonding group in the polymer compound A′ is 0.1 mol % or more.

11. The thermo/photosensitive composition according to claim 8 , wherein a content of the polymer compound A′ ranges from 5 to 95% in terms of solid components.

12. The thermo/photosensitive composition according to claim 8 , wherein a weight average molecular weight of the polymer compound A′ is 40,000 or more.

13. The thermo/photosensitive composition according to claim 8 , wherein the polymer compound A′ comprises, as a polymer unit, an additional radical-polymerizing compound having an acid group.

14. The thermo/photosensitive composition according to claim 13 , wherein an acid value of the polymer compound A′ ranges from 0.5 to 4.0 meq/g.

15. A thermo/photosensitive composition according to claim 8 , wherein a group having an ethylenic unsaturated bond on a side chain of the polymer compound A′ is represented by any one of the following formulae (C-1) through (C-3):

wherein in formula (C-1), Rc 1 represents a hydrogen atom or a monovalent organic group; Rc 2 and Rc 3 each independently represent a hydrogen atom, a halogen atom, an amino group, a carboxyl group, an alkoxycarbonyl group, a sulfo group, a nitro group, a cyano group, or a monovalent organic group; and Xc represents an oxygen atom, a sulfur atom, or —NRc 4′ -, in which Rc 4′ represents a hydrogen atom or a monovalent organic group;

in formula (C-2), Rc 4 through Rc 8 each independently represent a hydrogen atom, a halogen atom, an amino group, a dialkylamino group, a carboxyl group, an alkoxycarbonyl group, a sulfo group, a nitro group, a cyano group, or a monovalent organic group; and Yc represents an oxygen atom, a sulfur atom, or —NRc 4′ -, in which Rc 4 represents a hydrogen atom or a monovalent organic group; and

in formula (C-3), Rc 9 represents a hydrogen atom or a monovalent organic group; Rc 10 and Rc 11 each independently represent a hydrogen atom, a halogen atom, an amino group, a dialkylamino group, a carboxyl group, an alkoxycarbonyl group, a sulfo group, a nitro group, a cyano group, or a monovalent organic group; and Zc represents an oxygen atom, a sulfur atom, —NRc 12 - or a phenylene group that may have a substituent, in which Rc 12 represents an alkyl group that may have a substituent.