申请人:Tosoh Corporation
公开号:EP3858873A1
公开(公告)日:2021-08-04
The present invention relates to resin particles including a residue unit represented by the following general formula (1) and having a volume average particle diameter equal to or more than 5 µm and equal to or less than 2000 µm, and a method for producing thereof. Fruthermore the present invention relates to a fluororesin comprising a residue unit represented by a general formula (1) and having a weight average molecular weight Mw in a range of 5 × 104 to 3 × 105, and a yellow index of a heat-melted molded product (thickness 3 mm) after 24 h at 280°C of equal to or less than 6, and a method for producing thereof.
In the formula (1), Rf1, Rf2, Rf3, and Rf4 are each independently one of the groups consisting of a fluorine atom, a linear perfluoroalkyl group having 1 to 7 carbon atoms, a branched perfluoroalkyl group having 3 to 7 carbon atoms, or a cyclic perfluoroalkyl group having 3 to 7 carbon atoms. The perfluoroalkyl group may have an ethereal oxygen atom. Further, Rf1, Rf2, Rf3, and Rf4 may be linked to one another to form a ring having 4 or more and 8 or less carbon atoms, and the ring may include an ethereal oxygen atom.
本发明涉及一种树脂颗粒,包括由以下通式(1)表示的残余物单元,其体积平均颗粒直径等于或大于5微米,等于或小于2000微米,以及生产这种树脂颗粒的方法。此外,本发明还涉及一种含通式(1)表示的残余物单元的氟树脂,其重量平均分子量 Mw 在 5×104 至 3×105 之间,在 280℃下 24 小时后热熔成型产品(厚度为 3 毫米)的黄色指数等于或小于 6,以及其生产方法。
在式 (1)中,Rf1、Rf2、Rf3 和 Rf4 分别独立地为氟原子、具有 1 至 7 个碳原子的直链全氟烷基、具有 3 至 7 个碳原子的支链全氟烷基或具有 3 至 7 个碳原子的环状全氟烷基组成的基团之一。全氟烷基可以具有一个乙氧基。此外,Rf1、Rf2、Rf3 和 Rf4 可彼此相连,形成一个具有 4 个或更多和 8 个或更少碳原子的环,该环可包括一个乙醚氧原子。