Heat-expandable microspheres and use thereof

2:

• The heat-expandable microspheres according to claim 1, wherein the polymerizable component contains the carboxyl group-containing monomer, and contains at least one selected from the group consisting of the (meth)acrylic acid ester-based monomer, the styrene-based monomer, and the (meth)acrylamide-based monomer.

3:

• The heat-expandable microspheres according to claim 2, wherein a weight ratio of the carboxyl group-containing monomer to the polymerizable component is 10 to 80 wt %, and a weight ratio of at least one selected from the group consisting of the (meth)acrylic acid ester-based monomer, the styrene-based monomer, and the (meth)acrylamide-based monomer to the polymerizable component is 10 to 77 wt %.

4:

• The heat-expandable microspheres according to claim 1, wherein the blowing agent contains greater than or equal to 70 wt % of a hydrocarbon having 5 to 6 carbon atoms.

5:

• The heat-expandable microspheres according to claim 1, wherein a weight ratio of acrylonitrile to the polymerizable component is less than or equal to 13 wt %.

6:

• Hollow particles that are an expanded product of the heat-expandable microspheres according to claim 1.

8:

• A composition comprising the heat-expandable microspheres according to claim 1, and a base material component.

9:

• A molded article obtained by molding the composition according to claim 8.

10:

• The heat-expandable microspheres according to claim 2, wherein the blowing agent contains greater than or equal to 70 wt % of a hydrocarbon having 5 to 6 carbon atoms.

11:

• The heat-expandable microspheres according to claim 3, wherein the blowing agent contains greater than or equal to 70 wt % of a hydrocarbon having 5 to 6 carbon atoms.

12:

• The heat-expandable microspheres according to claim 2, wherein a weight ratio of acrylonitrile to the polymerizable component is less than or equal to 13 wt %.

13:

• Hollow particles that are an expanded product of the heat-expandable microspheres according claim 2.

15:

• A composition comprising the hollow particles according to claim 6, and a base material component.

16:

• A composition comprising the fine-particle-coated hollow particles according to claim 7, and a base material component.

17:

• A molded article obtained by molding the composition according to claim 15.

18:

• A molded article obtained by molding the composition according to claim 16.

19:

• The heat-expandable microspheres according to claim 3, wherein a weight ratio of acrylonitrile to the polymerizable component is less than or equal to 13 wt %.

20:

• The heat-expandable microspheres according to claim 11, wherein a weight ratio of acrylonitrile to the polymerizable component is less than or equal to 13 wt %.