Abstract:
An insulated wire, containing: a conductor; a foamed insulating layer; and an unfoamed filled layer on the outer circumference of the foamed insulating layer, in which the filled layer contains a partial discharge resistant material, which insulated wire has all of high partial discharge inception voltage, resistance to partial discharge, heat resistance, and abrasion resistance (scratch resistance).
Abstract:
A film comprising a copolyester wherein said copolyester comprises repeating units derived from an aliphatic glycol, an aromatic dicarboxylic acid, and a comonomer (M) selected from the group consisting of N,N′-bis-(2-hydroxyalkyl)-bicyclo-[2,2,2]-oct-7-ene-2,3,5,6-tetracarboxylic diimide (BODI) and 2-hydroxyalkyl-2-[p-(2-hydroxyethoxycarbonyl)phenyl]-1,3-dioxo-2H-isoindole-5-carboxylate (DOIC), wherein the number of carbon atoms is the 2-hydroxyalkyl group is 2, 3 or 4, and wherein comonomer (M) constitutes a proportion of the glycol fraction of the copolyester.
Abstract:
A halogen-free resin composition includes (A) 100 parts by weight of polyphenylene oxide resin; (B) 10 to 50 parts by weight of maleimide resin; (C) 5 to 100 parts by weight of polybutadiene copolymer; (D) 5 to 30 parts by weight of cyanate ester resin; and (E) 15 to 150 parts by weight of phosphazene. The halogen-free resin composition is characterized by specific ingredients and proportions thereof to achieve circuit board laminate properties, such as a high glass transition temperature, low coefficient of thermal expansion, low dielectric properties, heat resistance, flame retardation, and being halogen-free, and thus is applicable to the manufacturing of a prepreg or resin film, thereby being applicable to the manufacturing of metal laminates and printed circuit boards.
Abstract:
A high-strength high-modulus polyimide fiber and its preparation method pertain to the technical field of high-performance organic fiber. This fiber includes the polyimide (PI) fiber made from 3,3′,4,4′-biphenyl tetracarboxylic diandhydride (BPDA), p-phenylenediamine (pPDA) and 2-(4-aminophenyl)-1H-benzimidazol-5-amine (BIA), wherein the molar ratio between PPDA and BIA is 1:10˜3:1. During the synthesis, other diamine and diandhydride monomers may also be added. In the preparation process, the gradient temperature reaction method and one-step continuous preparation method are adopted, the synthesis and processing difficulty caused by the increase of the content of BIA is overcome, the problem of poor uniformity and stability of fiber is solved and PI fiber with high strength and high modulus is obtained. Its strength may reach 4.5 GPa and modulus may reach 201 GPa. Moreover, the sources of the raw materials are extensive, the spinning process is continuous, the cost is low, the efficiency is high and industrial production may be realized.
Abstract:
Provided is a lithium secondary battery in which negative-electrode active material particles containing silicon and/or a silicon alloy are used and which prevents the occurrence of breakage of a binder itself and peel-off of the binder at the interfaces with the negative-electrode active material and the negative-electrode current collector and has a high energy density and an excellent cycle characteristic. The lithium secondary battery includes: a negative electrode in which a negative-electrode active material layer including negative-electrode active material particles containing silicon and/or a silicon alloy and a binder is formed on a surface of electrically conductive metal foil serving as a negative-electrode current collector; a positive electrode; and a nonaqueous electrolyte, wherein the binder contains a polyimide resin including a crosslinked structure formed by imidization of a hexavalent or higher-valent carboxylic acid or an anhydride thereof with a diamine.
Abstract:
The present disclosure relates to a nitrogen containing thermoplastic polymer composition having reduced combustion toxicity. The disclosed thermoplastic composition comprises at least one polyetherimide resin, and at least one combustion toxicant suppressant. Also disclosed is a method for making the disclosed thermoplastic polymer composition and an article of manufacture comprising the disclosed polymer composition.
Abstract:
Provided are a substrate for an OED and a use thereof. The substrate may be applied to manufacture a flexible device exhibiting a suitable haze to have an excellent physical property such as transmittance, and also have excellent physical properties such as surface smoothness and refractive index when needed.
Abstract:
The present invention aims to provide a carboxyl group-containing polyimide, and prepolymer thereof which give a cured product highly satisfying thermosetting property, PCT resistance, solvent resistance and peel strength at the same time. The present invention relates to a terminal acid anhydride group-containing imide prepolymer which is characterized by being produced by reacting an acid anhydride group in a tetracarboxylic acid dianhydride with an isocyanate group in a diisocyanate compound, and a carboxyl group-containing polyimide which is characterized in having such a structure where the chain of said terminal acid anhydride group-containing imide prepolymer is extended via a polyol compound. The present invention also relates to a thermosetting resin composition and a flexible metal-clad laminate which utilize such carboxyl group-containing polyimide.
Abstract:
Improvements in compressor manufacture are achieved by utilizing polymeric components which retain at least 90% of their dimensions after being exposed to a mixture of refrigerants and/or lubricants for 30 days at 60° C. Polymeric materials include (i) polyetherimides, (ii) polyphenylene sulfides, (iii) polyketones, (iv) polysulfones, (v) liquid crystal polymers, and (vi) combinations thereof. Metal coatings on the polymers are the preferred embodiments for housings.