申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0889067A1
公开(公告)日:1999-01-07
The invention refers to amorphous polymers containing repeat units derived from:
27-60 mole percent hexafluoropropylene, up to 35 mole percent total of one or more second monomers, and the balance tetrafluoroethylene, provided that at least one mole percent of TFE is present in the polymer, and wherein said second monomer is ethylene, vinyl fluoride, trifluoroethylene, 3,3,3-trifluoropropene, 2,3,3,3-tetrafluoropropene, 4-bromo-3,3,4,4-tetrafluoro-1-butene, CH2=CHO(C=O)R2 wherein R2 is perfluoro-n-alkyl containing 1 to 8 carbon atoms, CH2=CHR3 wherein R3 is perfluoro-n-alkyl containing 1 to 8 carbon atoms, CH2=CH(C=O)OR4 wherein R4 is CnFxHy wherein x+y = 2n+1 and n is 1 to 8, chlorotrifluoroethylene, or allyltrimethoxysilane;
27-60 mole percent hexafluoropropylene, up to 5 mole percent total of one or more fourth monomers and the balance tetrafluoroethylene, provided that the polymer contains at least 1 mole percent tetrafluoroethylene, wherein said fourth monomer is perfluorocyclopentene, perfluorocyclobutene, CF2=CFCF2CN, CF2=CFR5 wherein R5 is perfluoroalkyl optionally containing one or more of one or more ether groups, one cyano group, or one sulfonyl fluoride group, perfluoro(2-methylene-4-methyl-1,3-dioxolane), perfluoro(2-methyl-2,3-dihydro-1,4-dioxin), or FSO2CF2CF2OCF(CF3)CF2OCF=CF2; or
up to 30 mole percent total of one or more second monomers and up to 5 mole percent total of one or more fourth monomers.
The polymers are particularly useful in the form of coatings, films and encapsulants.
本发明所指的无定形聚合物含有由以下物质衍生的重复单元:
其中所述第二单体为乙烯、氟化乙烯、三氟乙烯、3,3,3-三氟丙烯、2,3,3、3-四氟丙烯、4-溴-3,3,4,4-四氟-1-丁烯、CH2=CHO(C=O)R2 其中 R2 是含有 1 至 8 个碳原子的全氟烷基、CH2=CHR3,其中 R3 是含有 1 至 8 个碳原子的全氟烷基;CH2=CH(C=O)OR4,其中 R4 是 CnFxHy,其中 x+y = 2n+1 且 n 是 1 至 8;三氟氯乙烯或烯丙基三甲氧基硅烷;
27-60 摩尔%的六氟丙烯、总计不超过 5 摩尔%的一种或多种第四单体和余量的四氟乙烯,前提是聚合物含有至少 1 摩尔%的四氟乙烯,其中所述第四单体为全氟环戊烯、全氟环丁烯、CF2=CFCF2CN、CF2=CFR5(其中 R5 是可选含有一个或多个醚基、一个氰基或一个磺酰氟基团的全氟烷基)、全氟(2-亚甲基-4-甲基-1,3-二氧戊环)、全氟(2-甲基-2,3-二氢-1,4-二恶英)或 FSO2CF2CF2OCF(CF3)CF2OCF=CF2;或
总量不超过 30 摩尔%的一种或多种第二单体和总量不超过 5 摩尔%的一种或多种第四单体。
这种聚合物特别适用于涂料、薄膜和封装剂。