40results about How to "Excellent long-term heat resistance" patented technology

A plastic optical fiber cable includes: a bare optical fiber including a core made of a poly(methyl methacrylate) or a copolymer including methyl methacrylate as a major component and a cladding layer including, at least in the outermost layer, a layer made of a certain fluorine-containing olefin-based resin; and a coating layer provided on the outer surface thereof. The coating layer includes a protective coating layer, a light blocking coating layer, and a functional coating layer, the layers being provided in the order mentioned from inner side. The protective coating layer is made of a certain resin material. The light blocking coating layer is made of a nylon-based resin including, as a major component, nylon 11 or nylon 12, the nylon-based resin containing monomer and oligomer compounds derived from the nylon-based resin in an amount of a certain range. The functional coating layer is made of a nylon-based resin composition having a crystalline melting point within a certain range, the nylon-based resin composition containing a certain amount of melamine cyanurate or bromine atoms and further containing a certain amount of inorganic chromatic pigments, or the layer is made of a nylon-based resin composition having a crystalline melting point of within a certain range and an oxygen transmission rate within a certain range.

The invention provides a plastic optical fiber cable comprising a plastic optical fiber having a core / clad structure, a light blocking coating layer provided around the plastic optical fiber, and a protective coating layer provided between the outermost layer of the core / clad structure and the light blocking coating layer. The outermost layer of the core / clad structure is made of a fluorine-containing olefin polymer containing at least a tetrafluoroethylene unit, the crystal melting heat of the fluorine-containing olefin polymer being 59 mJ / mg or lower. The light blocking coating layer is made of a resin primarily containing a polyamide resin, the content of polyamide resin-derived monomers and oligomers being 1.5% by weight or lower.

The present invention relates to a method for producing a cured product of a thermosetting resin composition and a cured product obtained thereby. The method includes: heating a thermosetting resin composition including the following ingredients (A) to (C) at a temperature of 100 to 200 DEG C for 1 to 60 minutes; and then further heating the thermosetting resin composition at a temperature of 220 to 350 DEG C for 10 to 6,000 minutes, thereby curing the thermosetting resin composition: (A) an allyletherified phenol resin; (B) an epoxy resin; and (C) a curing accelerator.

The present invention relates to a method for producing a cured product of a thermosetting resin composition and a cured product obtained thereby. The method includes: heating a thermosetting resin composition including the following ingredients (A) to (C) at a temperature of 100 to 200 DEG C for 1 to 60 minutes; and then further heating the thermosetting resin composition at a temperature of 220 to 350 DEG C for 10 to 6,000 minutes, thereby curing the thermosetting resin composition: (A) an allylated phenol resin; (B) an epoxy resin; and (C) a curing accelerator.

A plastic optical fiber cable includes: a bare plastic optical fiber including a core formed of a polymer containing a methyl methacrylate unit, and a clad layer including a layer formed of a specific fluorine-containing olefin resin at least in the outermost layer; and a coating layer around the bare plastic optical fiber, the coating layer including a light-shielding coating layer formed of a specific nylon resin composition, a functional coating layer (C) and a functional coating layer (D) in this order, where one of the functional coating layer (C) and the functional coating layer (D) is formed of a resin composition (I) containing a polybutylene terephthalate resin as a major component or an ethylene-vinyl alcohol copolymer as a major component; the other is formed of a specific nylon resin composition (II); and a ratio of the thickness of the functional coating layer (C) to the thickness of the functional coating layer (D) is set to fall within a specific range.

Provided is an aromatic polycarbonate resin composition containing 0.01-0.1 part by mass of an alicyclic epoxy compound (B), 0.2-0.6 part by mass of a polyether compound (C) having a polyoxyalkylene structure, and 0.005-1 part by mass of a phosphorus compound (D) per 100 parts by mass of an aromatic polycarbonate resin (A), wherein the difference between the YI value of a 5-mm-thick molded articleobtained by molding the aromatic polycarbonate resin composition at 320 DEG C after 3000 hours in an environment at 85 DEG C and 85% RH and an initial YI value is 3.0 or less.

A polyimide resin composition contains a polyimide resin (A) including repeating constituent units represented by formula (1) and repeating constituent units represented by formula (2), having a content ratio of repeating constituent units of formula (1) to the total repeating constituent units of formula (1) and repeating constituent units of formula (2) of 20-70 mol%; and a nanocarbon material (B). (R1 is a C6-22 divalent group including at least one alicyclic hydrocarbon structure. R2 is a C5-16 divalent chain aliphatic group. X1 and X2 are each independently a C6-22 tetravalent group including at least one aromatic ring.).

Disclosed is a cured product of an adamantane derivative having a specific structure, which is excellent in transparency, optical characteristics such as (long-term) light resistance, long-term heat resistance, dielectric constant and mechanical properties. This resin cured product is suitably used in the fields of electronic / optical material.

Provided is an insulated electric wire that mainly contains a polyolefin resin, has excellent flexibility, heat life, and waterproofness, and is used in wiring of vehicles such as automobiles, and an insulating resin composition used in forming an insulating layer of this insulated electric wire. The insulating resin composition contains a first copolymer, which is a copolymer of ethylene and an unsaturated hydrocarbon having 4 or more carbon atoms and which has a density less than 0.88 g / cm3, a second copolymer which is a copolymer of ethylene and an acrylic acid ester or a methacrylic acid ester, a flame retardant, and a crosslinking aid. Also provided is a crosslinked body having a 2% secant modulus of 35 MPa or less at room temperature and an elastic modulus of 2 MPa or more at 150° C.

The present invention provides a polyphenylene sulfide fiber having little change in fiber structure and excellent long-term heat resistance. That is, there is provided a polyphenylene sulfide fiber characterized by having a crystallinity of 45.0% or more, a mobile amorphous content of 15.0% or less, and a weight average molecular weight of 300,000 or less.

This polyimide resin composition contains: a polyimide resin (A) including a repeating constituent unit represented by formula (1) and a repeating constituent unit represented by formula (2), wherein the content ratio of the repeating constituent unit represented by formula (1) to the total of the repeating constituent unit represented by formula (1) and the repeating constituent unit represented by formula (2) is 20-70 mol%; and an antioxidant (B), wherein the antioxidant (B) contains a cerium-containing compound (B2) or at least one copper compound (B1) selected from the group consisting of copper fluoride, copper bromide, copper iodide, and copper carboxylate. (R1 represents a divalent group having 6-22 carbon atoms and including at least one alicyclic hydrocarbon structure. R2 represents a divalent linear aliphatic group having 5-16 carbon atoms. X1 and X2 each independently represent a tetravalent group having 6-22 carbon atoms and including at least one aromatic ring.).

A polyamide acid which contains at least one diamine compound selected from among diamine compounds represented by general formula (8) within the range of 3-60 parts by mole in total per 100 parts by mole of all diamine components, while containing a biphenyl tetracarboxylic acid dianhydride within the range of 40-100 parts by mole and a pyromellitic acid dianhydride within the range of 0-60 parts by mole per 100 parts by mole of all acid anhydride components; and a thermoplastic polyimide which is obtained curing this polyamide acid.(In formula (8), linking group X represents a single bond or a divalent group selected from among —CONH—; each Y independently represents a hydrogen atom, a monovalent hydrocarbon group having 1-3 carbon atoms or an alkoxy group; n represents an integer of 0-2; and each of p and q independently represents an integer of 0-4.)