- 专利标题: Method of producing polyamide fine particles, and polyamide fine particles
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申请号: US17288959申请日: 2019-10-24
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公开(公告)号: US11685813B2公开(公告)日: 2023-06-27
- 发明人: Itaru Asano , Tomohiko Nakamura , Yota Okuno , Nobuhiro Morioka
- 申请人: Toray Industries, Inc.
- 申请人地址: JP Tokyo
- 专利权人: Toray Industries, Inc.
- 当前专利权人: Toray Industries, Inc.
- 当前专利权人地址: JP Tokyo
- 代理机构: DLA Piper LLP (US)
- 优先权: JP 18211097 2018.11.09
- 国际申请: PCT/JP2019/041713 2019.10.24
- 国际公布: WO2020/095702A 2020.05.14
- 进入国家日期: 2021-04-27
- 主分类号: C08J3/14
- IPC分类号: C08J3/14 ; C08G69/08
摘要:
A method produces polyamide fine particles by polymerizing a polyamide monomer (A) in the presence of a polymer (B) at a temperature equal to or higher than the crystallization temperature of a polyamide to be obtained, wherein the polyamide monomer (A) and the polymer (B) are homogeneously dissolved at the start of polymerization, and polyamide fine particles are precipitated after the polymerization. Polyamide fine particles have a number average particle size of 0.1 to 100 μm, a sphericity of 90 or more, a particle size distribution index of 3.0 or less, a linseed oil absorption of 100 mL/100 g or less, and a crystallization temperature of 150° C. or more.
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