Polyimide
    7.
    发明授权
    Polyimide 失效
    聚酰亚胺

    公开(公告)号:US4908409A

    公开(公告)日:1990-03-13

    申请号:US119042

    申请日:1987-11-10

    IPC分类号: C08G73/10

    CPC分类号: C08G73/1071 C08G73/1046

    摘要: Polyimide of this invention is almost colorless and has remarkably high light transmittance as well as excellent processability and adhesive properties at high temperatures in addition to its substantial high-temperature stability.The polyimide is a novel polyimide capable of being used for space and aeronautical materials, electric and electronic members, automotive parts, and furthermore for high-temperature adhesives.The polyimide has recurring units of the following formula ##STR1## wherein X is a radical selected from the group consisting of a bond, divalent hydrocarbon radical having from 1 to 10 carbons, hexafluorinated isopropylidene radical, carbonyl radical, sulfonyl radical and thio radical, and each nitrogen atom of imide ring is located simultaneously at meta- or para-position to ether linkage.The polyimide of this invention is prepared by reacting 4,4'-(p-phenylenedioxy)diphthalic dianhydride with an ether diamine having the following general formula (V): ##STR2## and successively imidizing the resultant polyamic acid. Examples of the ether diamine used for preparing the polyamide include,2,2-bis[4-(3-aminophenoxy)phenyl]propane,2,2-bis[4-(4-aminophenoxy)phenyl]propane,2,2-bis[4-(3-aminophenoxy)phenyl]-1,1,1,3,3,3-hexafluoropropane,2,2-bis[4-(4-aminophenoxy)phenyl]-1,1,1,3,3,3-hexafluoropropane,4,4'-bis(3-aminophenoxy)biphenyl,4,4'-bis(4-aminophenoxy)biphenyl,bis[4-(3-aminophenoxy)phenyl] ketone,bis[4-(4-aminophenoxy)phenyl] ketone,bis[4-(3-aminophenoxy)phenyl] sulfide,bis[4-(4-aminophenoxy)phenyl] sulfide,bis[4-(3-aminophenoxy)phenyl] sulfone andbis[4-(4-aminophenoxy)phenyl] sulfone.

    摘要翻译: 本发明的聚酰亚胺除了具有显着的高温稳定性外,几乎是无色的,并且具有非常高的透光率以及优异的加工性和高温下的粘合性。 该聚酰亚胺是一种能用于空间和航空材料,电气和电子部件,汽车部件以及高温粘合剂的新型聚酰亚胺。 聚酰亚胺具有以下结构式的重复单元:其中X是选自键,具有1至10个碳的二价烃基,六氟化异丙叉基,羰基,磺酰基 自由基和硫基,并且酰亚胺环的每个氮原子同时位于醚键或对位至醚键。 本发明的聚酰亚胺通过使4,4' - (对亚苯基二氧基)二邻苯二甲酸二酐与具有以下通式(V)的醚二胺反应:(V)并依次酰亚胺化得到的聚酰胺酸制备。 用于制备聚酰胺的醚二胺的实例包括2,2-双[4-(3-氨基苯氧基)苯基]丙烷,2,2-双[4-(4-氨基苯氧基)苯基]丙烷, 双[4-(3-氨基苯氧基)苯基] -1,1,1,3,3,3-六氟丙烷,2,2-双[4-(4-氨基苯氧基)苯基] -1,1,1,3, 3,3'-六氟丙烷,4,4'-双(3-氨基苯氧基)联苯,4,4'-双(4-氨基苯氧基)联苯,双[4-(3-氨基苯氧基)苯基]酮,双[4-( 双[4-(3-氨基苯氧基)苯基]硫醚,双[4-(4-氨基苯氧基)苯基]硫醚,双[4-(3-氨基苯氧基)苯基]砜和双[4 - (4-氨基苯氧基)苯基]砜。