Polymer, surface hydrophilizing agent containing said polymer, and manufacturing method for substrate having hydrophilic surface
To provide a novel polymer having an excellent non-specific adsorption inhibitory effect, a surface-hydrophilizing agent comprising the polymer, and a method for producing a substrate having a hydrophilic surface. The polymer comprises a hydrophilic repeating unit having a sulfinyl group in a side chain thereof.
1. A polymer, comprising a hydrophilic repeating unit represented by the following formula (2):
wherein:
R 1 represents a hydrogen atom or a methyl group;
R 2 represents —O—, *—(C═O)—O—, *—(C═O)—NR 5 —, *—NR 5 —(C═O)—, or a phenylene group;
R 5 represents a hydrogen atom or a C1 to C10 organic group;
* denotes the position of bonding to the carbon atom to which R 1 is bonded in formula (2);
R 3 represents a direct bond or a C1 to C24 divalent organic group; and
R 4 represents a C1 to C10 organic group, and
wherein at least one of R 3 and R 4 contain a hydroxy group.
2. The polymer according to claim 1 , further comprising a hydrophobic repeating unit.
3. The polymer according to claim 2 , wherein the hydrophobic repeating unit is derived from at least one monomer selected from the group consisting of a styrene, a (meth)acrylate, and a (meth)acrylamide.
4. The polymer according to claim 1 , which is water-soluble.
5. The polymer according to claim 1 , which has an HLB value of 10 to 22.
6. A surface-hydrophilizing agent, comprising a polymer comprising a hydrophilic repeating represented by the following formula (2):
wherein:
R 1 represents a hydrogen atom or a methyl group;
R 2 represents —O—, *—(C═O)—O—, *—(C═O)—NR 5 —, *—NR 5 —(C═O)—, or a phenylene group;
R 5 represents a hydrogen atom or a C1 to C10 organic group;
* denotes the position of bonding to the carbon atom to which R 1 is bonded in formula (2);
R 3 represents a direct bond or a C1 to C24 divalent organic group; and
R 4 represents a C1 to C10 organic group, and
wherein at least one of R 3 and R 4 contain a hydroxy group.
7. The surface-hydrophilizing agent according to claim 6 , wherein the polymer further comprises a hydrophobic repeating unit.
8. The surface-hydrophilizing agent according to claim 7 , wherein the hydrophobic repeating unit of the polymer is derived from at least one monomer selected from the group consisting of a styrene, a (meth)acrylate, and a (meth)acrylamide.
9. The surface-hydrophilizing agent according to claim 6 , wherein the polymer is water-soluble.
10. The surface-hydrophilizing agent according to claim 6 , wherein the polymer has an HLB value of 10 to 22.
11. A method for producing a substrate having a hydrophilic surface, the method comprising contacting a substrate with a surface-hydrophilizing agent comprising a hydrophilic repeating unit represented by the following formula (2):
wherein:
R 1 represents a hydrogen atom or a methyl group;
R 2 represents —O—, *—(C═O)—O—, *—(C═O)—NR 5 —, *—NR 5 —(C═O)—, or a phenylene group;
R 5 represents a hydrogen atom or a C1 to C10 organic group;
* denotes the position of bonding to the carbon atom to which R 1 is bonded in formula (2);
R 3 represents a direct bond or a C1 to C24 divalent organic group; and
R 4 represents a C1 to C10 organic group, and
wherein at least one of R 3 and R 4 contain a hydroxy group.
12. The method for producing a substrate having a hydrophilic surface according to claim 11 , wherein said contacting comprises the following (1) or (2):
(1) contacting the substrate with a solution comprising a solvent and the surface-hydrophilizing agent, and physically adsorbing the surface-hydrophilizing agent on the surface of the substrate in the solution, with the solvent remaining; or
(2) contacting the substrate with a solution comprising a solvent and the surface-hydrophilizing agent, and evaporating the solvent through drying, to thereby form a dry film of the surface-hydrophilizing agent on the surface of the substrate.