To provide a modified PTFE which can be formed under a low extrusion pressure and with which changes of the extrusion pressure are suppressed, even in paste extrusion at a high RR ratio, and its production method.
A modified polytetrafluoroethylene having units based on tetrafluoroethylene, units based on a monomer represented by the following formula (1) and units based on a monomer represented by the following formula (2),
wherein the content of the units based on the monomer represented by the formula (1) is from 0.020 to 0.040 mass% to all units of the modified polytetrafluoroethylene, and
the content of the units based on the monomer represented by the formula (2) is from 0.003 to 0.080 mass% to all units of the modified polytetrafluoroethylene:
CH2=CH-CnF2n+1 (1)
wherein n is from 2 to 6;
CF2=CFO(LO)mRf (2)
wherein L is a perfluoroalkylene group, Rf is a perfluoroalkyl group, and m is an integer of from 0 to 4.
提供一种改性聚
四氟乙烯(P
TFE)及其生产方法,该改性聚
四氟乙烯可在较低的挤出压力下成型,即使在高 RR 比的糊状挤出中也能抑制挤出压力的变化。
一种改性聚
四氟乙烯,具有基于
四氟乙烯的单元、基于下式(1)代表的单体的单元和基于下式(2)代表的单体的单元、
其中以式(1)代表的单体为基础的单元的含量为改性聚
四氟乙烯所有单元的 0.020 至 0.040 质量%,以及 以式(2)代表的单体为基础的单元的含量为改性聚
四氟乙烯所有单元的 0.020 至 0.040 质量%。
式(2)所代表单体的单元含量为改性聚
四氟乙烯所有单元的 0.003 至 0.080 质量%:
CH2=CH-CnF2n+1 (1)
其中 n 为 2 至 6;
CF2=CFO(LO)mRf (2)
其中 L 为
全氟烯基,Rf 为
全氟烷基,m 为 0 至 4 的整数。