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    • 5. 发明授权
    • Polyimide resin-fluoropolymer compositions
    • 聚酰亚胺树脂 - 含氟聚合物组合物
    • US4816516A
    • 1989-03-28
    • US63962
    • 1987-06-19
    • Norimasa YamayaNobuhito KogaKenichi Baba
    • Norimasa YamayaNobuhito KogaKenichi Baba
    • C08L27/12C08L79/08C08L87/00
    • C08L79/08C08L27/12Y10S525/928
    • This invention is a polyimide resin composition containing 100 parts by weight of polyimide having recurring units of the following formula: ##STR1## wherein Y is a bond, divalent hydrocarbon radical having from 1 to 10 carbons, hexafluorinated isopropylidene radical, carbonyl radical, thio radical, sulfinyl radical, sulfonyl radical or oxide, and R is a tetravalent radical of aliphatic radical having at least 2 carbons, alicyclic radical, monoaromatic radical, condensed polyaromatic radical, or noncondensed polyaromatic radical wherein aromatic radicals are mutually connected with a bond or a crosslinking function and from 5 to 100 parts by weight of fluororesin. The resin composition can provide molded products which are excellent in high-temperature stability, dimensional stability and mechanical strength and moreover have a low friction coefficient and good wear resistance. Therefore, the composition is useful as the material for electric and electronic devices, precision instrument parts etc.Polyimide of this invention can be prepared from aromatic diamines and tetracarboxylic acid dianydrides. Suitable aromatic diamines are 4,4'-bis(3-aminophenoxy)biphenyl, 2,2-bis[4-(3-aminophenoxy)phenyl]propane, bis[4-(3aminophenoxy)phenyl] sulfide etc. Suitable tetracarboxylic acid dianhydrides are pyromellitic dianhydride and 3,3', 4,4'-benzophenonetetracarboxylic dianhydride.Representative fluororesin which can be used in this invention is polytetrafluoroethylene.
    • 本发明是一种聚酰亚胺树脂组合物,其含有100重量份具有下式重复单元的聚酰亚胺:其中Y为键,具有1至10个碳的二价烃基,六氟化异丙叉基, 羰基,硫基,亚磺酰基,磺酰基或氧化物,R是具有至少2个碳的脂族基团的四价基团,脂环族基团,单芳族基团,缩合多芳族基团或非缩合多芳族基团,其中芳族基团与 键或交联功能和5至100重量份的氟树脂。 树脂组合物可以提供高温稳定性,尺寸稳定性和机械强度优异的成型体,并且摩擦系数低,耐磨性好。 因此,该组合物可用作电气和电子设备的材料,精密仪器部件等。本发明的聚酰亚胺可以由芳族二胺和四羧酸二酐制备。 合适的芳族二胺是4,4'-双(3-氨基苯氧基)联苯,2,2-双[4-(3-氨基苯氧基)苯基]丙烷,双[4-(3-氨基苯氧基)苯基]硫醚等。适用的四羧酸二酐 是均苯四酸二酐和3,3',4,4'-二苯甲酮四羧酸二酐。 可用于本发明的代表性氟树脂是聚四氟乙烯。