This application features a method of forming a polymer layer on the surface of a substrate using a self-initiating monomer. A polymer layer is formed by polymerization of a monomer on a metal layer to fill or cover defects of the metal layer. The metal layer the polymer layer may be used as an airtight material.

One embodiment may provide a method for producing a polyimide film, the method comprising the steps of: polishing the surface of a casting body; producing a gel sheet by casting a precursor on the polished surface of the casting body, and drying same; and producing a polyimide film by heat-treating the gel sheet, wherein the roughness of the polished surface of the casting body is 0.1 nm to 160 nm, and when the area of the casting body onto which the precursor is casted is partitioned by 1 cm×1 cm, the area corresponding to a defect reduction region is at least 90%, and the polyimide film has a yellowness of at most 3, a haze of at most 1%, a permeability of at least 88%, a modulus of at least 5.0 GPa and a surface hardness of at least HB.

An emulsion of a nitrogen atom-containing polymer or salt thereof and a method for producing it are provided. The emulsion has high stability and low dispersity of the particle diameter of emulsified particles. A method for producing particles including a crosslinked nitrogen atom-containing polymer or sat thereof using the emulsion is also provided. The method for producing the emulsion includes a step of mixing a first solution that includes a nitrogen atom-containing polymer or salt thereof and a hydrophilic solvent and has a viscosity of 10 to 2,000 mPa.Math.s, and a second solution that includes a hydrophobic solvent and has a viscosity of 1 to 100 mPa.Math.s, stirring the mixture, and thus obtaining an emulsion of the nitrogen atom-containing polymer or salt thereof, wherein a ratio between the viscosity of the first and second solutions is in a range of 0.1:1 to 300:1.

A method of making a polymer article comprises the steps of making a polymer solution by mixing a first compound containing carbodiimide groups with a second compound containing carboxylated groups, applying the polymer solution to a former, wherein the step of applying occurs within 2 hours of the making of the polymer solution, and curing the polymer solution. The polymer solution can have a pH adjuster consisting of ammonium hydroxide.

The present invention provides a thermosetting resin composition characterized by comprising a bismaleimide compound and a triazine compound having a diaminotriazine structure.

Dry prepregs for ceramic matrix composites are described. The dry prepregs comprise a tow or fabric of ceramic fibers infiltrated with preceramic matrix comprising low levels of an aqueous solvent. The preceramic matrix contains an inorganic portion and a binder system. Binder systems comprising a binder and a plasticizer for the binder are described.

Disclosed herein is a prepreg including a woven fabric base and a semi-cured product of a resin composition impregnated into the woven fabric base. The resin composition contains a maleimide resin as Component (A), an acrylic resin as Component (B), and a phenol resin as Component (C). The Component (B) has a weight average molecular weight falling within the range from 200,000 to 850,000.

A composite particulate for a lithium battery, wherein the composite particulate has a diameter from 10 nm to 50 μm and comprises one or more than one anode active material particles that are dispersed in a high-elasticity polymer matrix or encapsulated by a high-elasticity polymer shell, wherein the high-elasticity polymer matrix or shell has a recoverable elastic tensile strain no less than 5%, when measured without an additive or reinforcement dispersed therein, and a lithium ion conductivity no less than 10.sup.−8 S/cm at room temperature and wherein the high-elasticity polymer comprises a polymer derived from a monomer selected from the group consisting of vinyl sulfite, ethylene carbonate, methyl methacrylate, vinyl acetate, fluorinated monomers having unsaturation for polymerization, sulfones, sulfides, nitriles, sulfates, siloxanes, silanes, and combinations thereof.

A laminated body including: a substrate; a storage layer; and a buffer layer disposed in this order, in which the storage layer is formed of a cured product of a composition containing a polyfunctional monomer (a1), inorganic particles (a2), and a surfactant (a3), the buffer layer is formed of a cured product of a composition containing a polyfunctional monomer (b1) and inorganic particles (b2), a content mass of the inorganic particles (a2) is 30% by mass or more, a content mass of the inorganic particles (b2) is 30% by mass or more, and the polyfunctional monomer (a1) and the polyfunctional monomer (b1) contain a polyfunctional monomer having a molecular weight per epoxy group in one molecule of 200 g/mol or more.

A blowing agent for thermosetting foams is disclosed. The blowing agent is predominately the trans isomer of the hydrochlorofluoroolefin (HCFO) HFCO-1233zd alone or in combination with a hydrofluoroolefin (HFO), hydrofluorocarbon (HFC), hydrochlorofluoroolefin (HCFO), a hydrocarbon. The blowing agent is effective as a blowing agent in the manufacture of thermosetting foams.