Coating layer, coating solution, method for forming coating layer, and method for producing medical tool

Patent metadata

Field	Value
Publication number	US-10251981-B2
Application number	US-201415026718-A
Country	US
Kind code	B2
Filing date	Sep 25, 2014
Priority date	Oct 2, 2013
Publication date	Apr 9, 2019
Grant date	Apr 9, 2019

Abstract

Provided is a coating layer including a reaction product of a diisocyanate compound (a) selected from the group consisting of aromatic diisocyanates, aliphatic diisocyanates, and alicyclic diisocyanates, a polyol (b), and a copolymer (c) having a functional group selected from the group consisting of carboxylic acid groups, carboxylic acid ester groups, and carboxylic acid anhydride groups. The coating layer exhibits sufficient lubricity in wet conditions and has excellent durability.

First claim

The invention claimed is:

1. A coating solution comprising:
a diisocyanate compound (a) selected from the group consisting of aromatic diisocyanates, aliphatic diisocyanates, and alicyclic diisocyanates;
a polyol (b); and
a copolymer (c) having a functional group selected from the group consisting of carboxylic acid groups, carboxylic acid ester groups, and carboxylic acid anhydride groups.

2. The coating solution according to claim 1 , wherein the coating solution contains the component (a) in an amount of 0.01 to 50% by weight relative to the total amount of all components, the component (b) in an amount of 0.01 to 30% by weight relative to the total amount of all components, and the component (c) in an amount of 40 to 99% by weight relative to the total amount of all components.

3. The coating solution according to claim 1 or 2 , wherein the number of moles of all isocyanate groups in the component (a) is larger than the number of moles of all hydroxy groups in the component (b).

4. The coating solution according to claim 1 , wherein the component (c) is a copolymer containing a maleic anhydride unit having a maleic anhydride group.

5. The coating solution according to claim 1 , wherein the component (c) is a vinyl ether/maleic anhydride copolymer containing a vinyl ether unit and a maleic anhydride unit having a maleic anhydride group.

6. The coating solution according to claim 1 , wherein the coating solution contains a prepolymer prepared by previously reacting at least some of the component (a) with at least some of the component (b) or the component (c).

7. The coating solution according to claim 1 , wherein in the component (c), at least a part of the carboxylic acid ester group and the carboxylic acid anhydride group is converted into the carboxylic acid group.

8. The coating solution according to claim 7 , wherein 1 mol % or more and 100 mol % or less of the total amount of the carboxylic acid ester group and the carboxylic acid anhydride group is converted into the carboxylic acid group.

9. The coating solution according to claim 1 , wherein the coating solution is a non-aqueous solution.

10. A method for forming a coating layer, the method comprising:
applying the coating solution according to claim 1 to at least a part of an object; and
drying the coating.

11. The method for forming a coating layer according to claim 10 , wherein the coating solution having a solution temperature of 40° C. or less is applied to the object.

Assignees

• Kaneka Corp

Inventors

• Hirata Masayuki

Classifications

• C08G18/36

  Hydroxylated esters of higher fatty acids · CPC title

• A61L29/085

  Macromolecular materials · CPC title

• C08G18/622

  Polymers of esters of alpha-beta ethylenically unsaturated carboxylic acids · CPC title

• C08G18/4063

  Mixtures of compounds of group C08G18/62 with other macromolecular compounds · CPC title

• C08L75/04

  Polyurethanes · CPC title