Modified polytetrafluoroethylene concentrated liquid and preparation method thereof

• Main Authors: LI TONG, CHEN YUE, SUI XIAOYUAN
• Format: Patent
• Language: Chinese; English
• Published: 19.02.2019
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention belongs to the technical field of organic synthesis, and particularly relates to modified polytetrafluoroethylene concentrated liquid and a preparation method thereof. A polymerization process is carried out in two steps: the first step is copolymerization of tetrafluoroethylene and a modifier A, and the second step is copolymerization of tetrafluoroethylene and a modifier B. The concentrated liquid prepared by the invention is relatively high in film forming property, high in film glossiness and excellent in stirring stability. The preparation method disclosed by the invention effectively controls macromolecular chain structures and reduces the use amount of the modifiers, so that the melting point of the modified polytetrafluoroethylene is reduced a little compared with themelting point before the modification, and the resin can be used in a high temperature environment. 本发明属于有机合成技术领域，具体的涉及种改性聚四氟乙烯浓缩液及其制备方法。聚合过程分两步进行，第步由四氟乙烯和改性剂A共聚，第二步由四氟乙烯和改性剂B共聚。本发明所制备的浓缩液具有较好的成膜性，所成膜光泽度高，同时兼具优良的搅拌稳定性。本发明所述的