摘要:
The invention provides a heat-curable resin composition comprising (A) a polyurethane having two or more carboxyl groups in one molecule, in particular a polyurethane having one or more carboxyl groups at a molecular terminal and (B) a heat-curable component, a cured product thereof, a solder resist and a protective film consisting of the cured product and a printed wiring board coated with the cured product. The polyurethane (A), preferably has a number average molecular weight of 500 to 100,000 and an acid value of 5 to 150 mgKOH/g. The heat-curable component (B) is preferably an epoxy resin. The heat-curable resin composition of the invention is excellent in adhesion with a substrate, low-warpage property, flexibility, resistance to moisture and heat, soldering heat resistance and resistance to tin plating.
摘要:
Disclosed is a carboxyl group-containing polyurethane (A) produced from a polyol (b) containing at least 10 mol % (relative to the total (100 mol %) of the polyol (b)) of a polyol (b1) which: (i) has a number-average molecular weight of 500 to 50,000; (ii) has 1 to 10 hydroxyl groups per molecule; and (iii) is one or a combination of two or more polyols selected from the group consisting of polybutadiene polyol, polyisoprene polyol, hydrogenated polybutadiene polyol and hydrogenated polyisoprene polyol. The carboxyl group-containing polyurethane (A) is suitable as materials of cured products, for example cured films, that are excellent in adhesion with substrates, low warpage, flexibility, plating resistance, soldering heat resistance and long-term reliability.
摘要:
The invention relates to a thermosetting composition comprising (A) a compound having at least one oxetanyl group in the molecule, (B) a compound having at least two carboxyl groups in the molecule, and (C) an imidazolium salt, curing method thereof and products cured thereby. Cured products prepared from the composition of the invention is excellent in electrical isolation, flexibility, adhesiveness and mechanical strength.
摘要:
The invention relates to a carboxyl group-containing polyurethane, which is obtained by reacting (a) a polyisocyanate compound, (b) a polycarbonate diol having a molecular weight of 300 to 50,000, (c) a dihydroxy compound having a carboxyl group and when necessary (d) a monohydroxy compound, a thermosetting composition using the carboxyl group-containing polyurethane and a paste for forming a film using thermosetting composition. The thermosetting composition of the invention is excellent in adhesion to a substrate, low warpage, flexibility, plating resistance and soldering heat resistance.
摘要:
A heat-curable resin composition has excellent printability, non-tackiness, matte and electrical properties. The heat-curable resin composition includes a heat-curable resin (A) and silicone powder (B). Preferably, the silicone powder (B) is spherical or substantially spherical, and has a specific gravity of 0.95 to 1.5 and a particle diameter of 0.01 to 10 μm. The heat-curable resin (A) preferably includes a carboxyl group-containing polyurethane and a heat-curable component. The carboxyl group-containing polyurethane is obtained by reacting a polyisocyanate compound (a), a polyol compound (b) (other than compound (c)), and a carboxyl group-containing dihydroxy compound (c).
摘要:
The invention provides a heat-curable resin composition comprising (A) a polyurethane having two or more carboxyl groups in one molecule, in particular a polyurethane having one or more carboxyl groups at a molecular terminal and (B) a heat-curable component, a cured product thereof, a solder resist and a protective film consisting of the cured product and a printed wiring board coated with the cured product. The polyurethane(A), preferably has a number average molecular weight of 500 to 100,000 and an acid value of 5 to 150 mgKOH/g. The heat-curable component (B) is preferably an epoxy resin. The heat-curable resin composition of the invention is excellent in adhesion with a substrate, low-warpage property, flexibility, resistance to moisture and heat, soldering heat resistance and resistance to tin plating.
摘要:
Provided is a radiation detector that prevents a decline in detection efficiency as well as having excellent temporal characteristics. The radiation detector 1, which detects a radiation, includes a scintillator array 10 having a plurality of scintillator cells 11, a photodetector array 20 having a plurality of photodetectors 21, and a photodetector array 30 having a plurality of photodetectors 31. The plurality of photodetectors 21 and the plurality of photodetectors 31 are solid-state photodetectors that can transmit a gamma ray G1, G2. The scintillator cell 11 is separated into a plurality of light emitting regions 11a, 11b by a reflecting region 12, and the reflecting region 12 extends between the incident surface 10a side and the back surface 10b side along a surface SP that is inclined with respect to the incident surface 10a and the back surface 10b.
摘要:
Provided are a composition containing a quantum dot fluorescent body, a molded body of a quantum dot fluorescent body dispersion resin, a structure containing a quantum dot fluorescent body, a light-emitting device, an electronic apparatus or a mechanical device, and a method for producing the molded body. The quantum dot fluorescent body is dispersed in a cycloolefin (co)polymer, which is a dispersion resin, to form the composition containing a quantum dot fluorescent body. The composition containing the quantum dot fluorescent body is molded, forming the molded body of the quantum dot fluorescent body dispersion resin. A gas barrier layer is formed at a portion or the entirety of the surface of the molded body of the quantum dot fluorescent body dispersion resin. A light-emitting device is configured using the composition containing the quantum dot fluorescent body as a sealing material that seals an LED chip.
摘要:
To provide an efficient method of producing an epoxy compound comprising reacting hydrogen peroxide and acetonitrile with the carbon-carbon double bond of an organic compound having a carbon-carbon double bond. A method of producing an epoxy compound comprising epoxidizing the carbon-carbon double bond of an organic compound having a carbon-carbon double bond in the presence of acetonitrile by using hydrogen peroxide as an oxidizing agent, wherein the reaction proceeds while controlling the acetonitrile concentration in the reaction system in the range of 0.6-5 mol/L by using a solvent containing an alcohol.
摘要:
Provided is a piezoelectric material having a high Curie temperature and satisfactory piezoelectric characteristics, the piezoelectric material being represented by the following general formula (1): A(ZnxTi(1-x))yM(1-y)O3 (1) where A represents a Bi element, M represents at least one element selected from Fe, Al, Sc, Mn, Y, Ga, and Yb; x represents a numerical value of 0.4≦x≦0.6; and y represents a numerical value of 0.17≦y≦0.60.