Invention Grant
- Patent Title: Hollow particles
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Application No.: US18272429Application Date: 2022-01-25
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Publication No.: US12215178B2Publication Date: 2025-02-04
- Inventor: Masashi Watanabe
- Applicant: ZEON CORPORATION
- Applicant Address: JP Tokyo
- Assignee: ZEON CORPORATION
- Current Assignee: ZEON CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: WHDA, LLP
- Priority: JP2021-012841 20210129
- International Application: PCT/JP2022/002494 WO 20220125
- International Announcement: WO2022/163600 WO 20220804
- Main IPC: C08F222/10
- IPC: C08F222/10 ; B01J13/16 ; B01J13/20 ; C08F212/36

Abstract:
Hollow particles which comprise a shell containing a resin and a hollow portion surrounded by the shell, wherein a void ratio is 50% or more; wherein a volume average particle diameter is 1.0 μm or more; wherein the shell contains, as the resin, a polymer in which 70 parts by mass to 100 parts by mass of a crosslinkable monomer unit is contained in 100 parts by mass of all monomer units; wherein a thermal expansion coefficient at 80° C. to 200° C. is 10.0×10−5/° C. or less; and wherein, in a hollow particle immersion test in which a mixture obtained by adding 0.1 mg of the hollow particles to 4 mL of acetone and shaking them for 10 minutes at a shaking rate of 100 rpm, is left to stand for 48 hours in an environment at 25° C., less than 10% by mass of the hollow particles submerge in the acetone.
Public/Granted literature
- US20240124634A1 HOLLOW PARTICLES Public/Granted day:2024-04-18
Information query
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