Crystalline polyimide for melt molding with satisfactory thermal stability
    2.
    发明授权
    Crystalline polyimide for melt molding with satisfactory thermal stability 有权
    用于熔体模塑的结晶聚酰亚胺,具有令人满意的热稳定性

    公开(公告)号:US06458912B1

    公开(公告)日:2002-10-01

    申请号:US09674916

    申请日:2001-02-05

    IPC分类号: C08G7300

    摘要: A thermoplastic polyimide having good thermal stability, comprising a repeating unit represented by the chemical formula (1), a molecular terminal being composed of the chemical formula (2) and/or chemical formula (3), characterized in that: a melt viscosity ratio calculated by the numerical formula (1) and/or the numerical formula (3) is within a numerical range shown in the numerical formula (2) and/or the numerical formula (4) and 1,3-bis(4-aminophenoxy)benzene represented by the chemical formula (3) for production of the above polyimide, characterized in that the content of an azo compound is from 0.0 to 0.2%. The thermoplastic polyimide of the present invention has excellent characteristics {circle around (1)} to {circle around (4)} described below. {circle around (1)} It is superior in thermal stability on melting. That is, the degree of lowering of the fluidity on melting with a lapse of time is small and it is possible to apply to conventional melt molding. {circle around (2)} It has high heat resistance. {circle around (3)} It is superior in productivity. {circle around (4)} It is superior in dimensional accuracy.

    摘要翻译: 一种具有良好热稳定性的热塑性聚酰亚胺,其包含由化学式(1)表示的重复单元,由化学式(2)和/或化学式(3)组成的分子末端,其特征在于:熔体粘度比 由式(1)和/或数值式(3)计算的数值在数值式(2)和/或数值式(4)和1,3-双(4-氨基苯氧基) 由化学式(3)表示的用于制备上述聚酰亚胺的苯,其特征在于偶氮化合物的含量为0.0-0.2%。 本发明的热塑性聚酰亚胺具有以下所述的{圆周(1)}〜{圆周(4)}的特性。 {circle around(1)}熔融时的热稳定性优异。 也就是说,随着时间的流逝,熔融流动性的降低程度小,可以适用于常规的熔融成型。 {circle around(2)}它具有很高的耐热性。 {circle around(3)}它的生产力优越。 {circle around(4)}尺寸精度优越。

    Process for producing polyimide
    3.
    发明授权
    Process for producing polyimide 有权
    聚酰亚胺生产工艺

    公开(公告)号:US06916898B2

    公开(公告)日:2005-07-12

    申请号:US10221501

    申请日:2001-03-13

    IPC分类号: C08G73/10 C08G69/26

    CPC分类号: C08G73/1032 C08G73/1007

    摘要: A process of preparing a polyimide of the present invention comprises effecting an imidization reaction of a diamine and a tetracarboxylic dianhydride in a solvent containing 50 to 100% by weight of an equimolar composition of a nitrogen-containing cyclic compound indicated by chemical formula (1) below and a phenol indicated by chemical formula (2) below: in formula (1), X represents —CH2— or —N(CH3)—, and in formula (2), R1 and R2 may be the same as, or different from, each other and represent each any one of —H, —OH, —CH3, —C2H5, —C3H7, —C4H9, —C5H11, —C6H13, —C7H15, —C8H17, —C9H19, —C10H21, —OCH3, —O(C6H5), —NO2, —Cl, —Br and —F.

    摘要翻译: 制备本发明的聚酰亚胺的方法包括在包含50-100重量%的等摩尔组合物的化学式(1)所示的含氮环状化合物的溶剂中进行二胺和四羧酸二酐的酰亚胺化反应, 在下面的化学式(2)表示的酚:在式(1)中,X表示-CH 2 - 或-N(CH 3) - ,并且在 式(2)中,R 1和R 2可以彼此相同或不同,表示-H,-OH,-CH 3个3个或3个以上的取代基,-C 2 - C 4 H 9,-C 5 H 11,-C 6 H C 13,C 7 H 15,-C 8 H 17, - C 8 - , - C 9 H 20,-C 10 H 21,-OCH 3 N, -O(C 6 H 5),-NO 2,-Cl,-Br和-F。

    Magnetic core and magnetic core-use adhesive resin composition
    4.
    发明授权
    Magnetic core and magnetic core-use adhesive resin composition 失效
    磁芯和磁芯使用粘合剂树脂组成

    公开(公告)号:US06917275B2

    公开(公告)日:2005-07-12

    申请号:US10474766

    申请日:2002-04-12

    摘要: The present invention provides a magnetic core whose outer surface has been coated without handling brittle ribbon to thereby impart insulating properties and shape retention properties to the magnetic core after annealing heat treatment, and further provides an adhesive resin composition for a magnetic core, which is useful for efficiently producing the above-mentioned magnetic core without using any organic solvent and which per se is stable to heat and elapse of time. By forming a coating film having a certain thickness or more on an outer surface using a composition containing a resin of specific properties, there can be obtained a magnetic core whose outer surface has been coated without handling brittle ribbon to thereby impart insulating properties and shape retention properties to the magnetic core after annealing heat treatment. The adhesive resin composition containing particles of a resin having specific properties is useful for efficiently producing the above-mentioned excellent magnetic core without using any organic solvent, and this composition is stable to heat and elapse of time.

    摘要翻译: 本发明提供了一种磁芯,其外表面已经被涂覆而不处理脆性带,从而在退火热处理后赋予磁芯绝缘性能和形状保持性,并且还提供了一种用于磁芯的粘合剂树脂组合物,其是有用的 用于有效地生产上述磁芯而不使用任何有机溶剂,并且其本身对于热稳定并经过时间。 通过使用包含特定树脂的组合物在外表面上形成一定厚度以上的涂膜,可以得到外表面未经处理的脆性表面的磁芯,从而赋予绝缘性和形状保持性 退火热处理后的磁芯性能。 含有具有特定性质的树脂颗粒的粘合剂树脂组合物可用于在不使用任何有机溶剂的情况下有效地制备上述优异的磁芯,并且该组合物在热和时间上是稳定的。

    Liquid crystal polyamide-imide copolymer
    6.
    发明授权
    Liquid crystal polyamide-imide copolymer 失效
    液晶聚酰胺 - 酰亚胺共聚物

    公开(公告)号:US5821319A

    公开(公告)日:1998-10-13

    申请号:US627037

    申请日:1996-04-03

    摘要: A sliding material and a heat resistant filament which primarily comprises a liquid crystal polyimide, a liquid crystal polyamide or a liquid crystal polyamide-imide copolymer having at least one recurring structural unit selected from the formula (1) and the formula (2) and is excellent in heat resistance, mechanical characteristics and other fundamental properties of polyimides, and relates to significant improvement of heat-resistance by heat-treating the sliding material, the filament and the molded items. The liquid crystal polyamide-imide copolymer which comprises in a polymer molecule 0.05.about.0.95 mole ratio of the recurring structural units of the formula (1) and 0.95.about.0.05 mole ratio of recurring structural units of the formula (2) has excellent processing ability ##STR1##

    摘要翻译: 一种滑动材料和耐热丝,其主要包括具有至少一个选自式(1)和式(2)的重复结构单元的液晶聚酰亚胺,液晶聚酰胺或液晶聚酰胺 - 酰亚胺共聚物,并且是 聚酰亚胺的耐热性,机械特性和其它基本性能优异,并且涉及通过热处理滑动材料,长丝和模制品而显着提高耐热性。 在聚合物分子中含有式(1)的重复结构单元的0.05分子量分数0.95摩尔比和式(2)的重复结构单元的0.95摩尔比的液晶聚酰胺 - 酰亚胺共聚物具有优异的加工能力, (1) (2)

    Polyimides and polyamic acids
    8.
    发明授权
    Polyimides and polyamic acids 失效
    聚酰亚胺和聚酰胺酸

    公开(公告)号:US06599675B2

    公开(公告)日:2003-07-29

    申请号:US10018368

    申请日:2001-12-19

    IPC分类号: G03F7004

    摘要: A polyimide having a repeating unit of the general formula (I) and a polyamic acid having a repeating unit of the formula (IV): (wherein, R1 and R2 represent H or a C1 to C20 alkyl group, and Z represents a condensed polycyclic aromatic group or an group of the following formulae: Herein, X represents —CO— or —C(═N2)—, Y represents a direct bond, —CH2—, —O—, —SO2—, —S—, —CO— or —C(═N2)—, and W represents a direct bond, —CH2—, —C(CH3)2—, —C(CF3)2—, —S—, —SO—, —SO2— or —O—, b, m and n are 0 or 1; r is a C1 to 4 alkyl group, halogen group or phenyl group; a is 0 or 1 to 3).

    摘要翻译: 具有通式(I)的重复单元的聚酰亚胺和具有式(IV)的重复单元的聚酰胺酸:(其中,R 1和R 2表示H或C 1至C 20烷基,Z表示稠合多环 芳基或下式的基团:这里,X表示-CO-或-C(= N 2) - ,Y表示直接键,-CH 2 - , - O - , - SO 2 - , - S - , - CO - 或-C(= N 2) - ,W表示直接键,-CH 2 - , - C(CH 3)2 - , - C(CF 3)2 - , - S - , - O-,b,m和n为0或1; r为C1至4烷基,卤素基或苯基; a为0或1至3)。