Hollow resin particle and method for producing same
Provided is a hollow resin particle that can reduce the dielectricity and dielectric loss tangent of a resin layer by introducing an empty area thereinto, and can be obtained by forming a hollow portion in a simple manner. Also provided is a method of producing such hollow resin particle in a simple manner. A hollow resin particle according to an embodiment of the present invention is a hollow resin particle including a shell portion and a hollow portion surrounded by the shell portion, wherein the shell portion contains an aromatic polymer (P1) obtained by polymerizing a monomer composition containing an aromatic crosslinkable monomer (a), an aromatic monofunctional monomer (b), and a (meth)acrylic acid ester-based monomer (c) having a specific structure.
1. A hollow resin particle, comprising:
a shell portion; and
a hollow portion surrounded by the shell portion,
wherein the average particle diameter of the hollow resin particle is from 0.1 μm to 1.270 μm,
wherein the shell portion contains an aromatic polymer (P1) obtained by polymerizing a monomer composition containing:
an aromatic crosslinkable monomer (a);
an aromatic monofunctional monomer (b); and
a (meth)acrylic acid ester-based monomer (c) represented by the formula (1):
where R 1 represents H or CH 3 , R 2 represents H, an alkyl group, or a phenyl group, R 3 —O represents an oxyalkylene group having 2 to 18 carbon atoms, and “m” represents an average number of moles added of the oxyalkylene group and represents a number of from 1 to 100,
and wherein the monomer composition contains 0.5 wt % to 100/11 wt % of the (meth)acrylic acid ester-based monomer (c) represented by the formula (1).
2. The hollow resin particle according to claim 1 , wherein the oxyalkylene group is at least one kind selected from the group consisting of: an oxyethylene group; an oxypropylene group; and an oxybutylene group.
3. The hollow resin particle according to claim 1 , wherein the monomer composition contains 10 wt % to 70 wt % of the aromatic crosslinkable monomer (a), 10 wt % to 70 wt % of the aromatic monofunctional monomer (b), and 0.5 wt % to 100/11 wt % of the (meth)acrylic acid ester-based monomer (c) represented by the formula (1).
4. The hollow resin particle according to claim 1 , wherein the shell portion contains the aromatic polymer (P1) and a non-crosslinked polymer (P2) that is at least one kind selected from the group consisting of: polyolefin; a styrene-based polymer; a (meth)acrylic acid-based polymer; and a styrene-(meth)acrylic acid-based polymer.
5. The hollow resin particle according to claim 1 , wherein the aromatic crosslinkable monomer (a) is divinylbenzene.
6. The hollow resin particle according to claim 1 , wherein the aromatic monofunctional monomer (b) is at least one kind selected from the group consisting of: styrene; and ethylvinylbenzene.
7. A method of producing the hollow resin particle of claim 1 , comprising dispersing an organic mixed solution in an aqueous solution containing at least one kind selected from the group consisting of: a dispersion stabilizer; and a surfactant, followed by suspension polymerization, the organic mixed solution containing a monomer composition containing an aromatic crosslinkable monomer (a), an aromatic monofunctional monomer (b), and a (meth)acrylic acid ester-based monomer (c) represented by the formula (1), a polymerization initiator, and an organic solvent having a boiling point of less than 100° C.:
where R 1 represents H or CH 3 , R 2 represents H, an alkyl group, or a phenyl group, R 3 —O represents an oxyalkylene group having 2 to 18 carbon atoms, and “m” represents an average number of moles added of the oxyalkylene group and represents a number of from 1 to 100.
8. A semiconductor material, comprising the hollow resin particle of claim 1 .