摘要:
A process of producing a urethane (meth)acrylate monomer having a low acid value and a low content of a hardly soluble high-molecular weight impurity which is crosslinked high-dimensionally, comprising the steps of: (1) contacting a first solution containing a urethane (meth) acrylate monomer having an acid value of more than 0.2 mgKOH/g and an organic solvent to a water-containing adsorbent capable of adsorbing an acid component to obtain a second solution containing a urethane (meth)acrylate monomer having an acid value of not more than 0.2 mgKOH/g, the organic solvent and more than 5,000 ppm (mass) of water based on the urethane (meth)acrylate monomer; (2) contacting the second solution to a dehydrating agent to obtain a third solution containing not more than 5,000 ppm (mass) of water based on the urethane (meth)acrylate monomer; and (3) removing the organic solvent from the third solution.
摘要:
Provided are a novel insulating material high both in thermal conductivity and light reflectance and a submount high in heat radiatability for mounting an LED element thereon, capable of raising a light utilization factor and quickly radiating heat generated from the element. For example, used as a substrate material of a submount is a nitride sintered body having a reflectance of light in the wavelength region of from 350 nm to 800 nm of 50% or more and a reflectance of light with a wavelength of 700 nm of 60% or more, obtained by sintering a preform consisting of a composition containing 100 parts by mass of aluminum nitride powder and 0.5 to 10 parts by mass of a compound containing an alkaline earth metal such as 3CaO·Al 2 O 3 in an inert atmosphere containing a specific quantity of carbon vapor, or by burning a coat of a nitride paste applied on a base substrate having a heat resistance at a predetermined temperature.
摘要:
A method of producing a nonfoamed formed article of a vinyl chloride resin by mixing a hydrated water-containing gypsum powder and a vinyl chloride resin powder together, and heating the obtained mixture at a temperature lower than a temperature at which the vinyl chloride resin starts decomposing thereby to remove the hydrated water of the gypsum and to form the mixture. The method makes it possible to obtain a nonfoamed formed article free of defective appearance by directly adding the hydrated gypsum (specifically dihydrate gypsum) to the vinyl chloride resin without converting it to the anhydrous gypsum, without requiring wasteful energy cost, without causing foaming or defective forming stemming from the hydrated water and maintaining stability.
摘要:
A photochromic chromene compound which develops a color of a neutral tint, has high color optical density, a high fading speed and high durability, and has an indeno(2,1-f)naphtho(1,2-b)pyran structure represented by the following formula as the basic skeleton, wherein a sulfur-containing substituent selected from thiol group, alkylthio group, alkoxyalkylthio group, haloalkylthio group, cycloalkylthio group, arylthio group and heteroarylthio group is bonded to the 6-position and/or 7-position carbon atom(s).
摘要:
A chromene compound having a skeleton represented by the following formula (1) and exhibiting double peak characteristic:
wherein Z is a group represented by any one of the following formulas:
n is an integer of 1 to 3, when n is 2 or 3, Z's may be the same or different, with the proviso that when n is 1, Z cannot be -CH 2 -, and when n is 2 or 3, Z's cannot be -CH 2 - at the same time; R 1 is an electron absorbing group having a Hammett constant σ p of more than 0, with the proviso that when there are a plurality of R 1 's, R 1 's may be the same or different; and X and Y are each independently an oxygen atom or =NR 2 , with the proviso that X and Y cannot be oxygen atoms at the same time.
摘要:
[Problem] To provide a coating composition for forming a hard coating which, by itself, favorably adheres to a plastic optical substrate, and effectively prevents the occurrence of cracks caused by the thermal hysteresis at the time of curing. [Means for Solution] The coating composition for forming a hard coating, contains a fine inorganic oxide particle, a hydrolyzable organosilicon compound, water, a curing catalyst and an organic solvent, wherein cyclic ketone is contained in an amount of 0.10 parts by mass to 30.00 parts by mass per 100 parts by mass of the total of the fine inorganic oxide particle and the hydrolyzable organosilicon compound.
摘要:
The present invention provides a process for producing a metalized substrate in which a predetermined metal paste composition is applied onto a sintered nitride ceramic substrate (10); the resultant is fired in a heat-resistant container at a predetermined condition; and the substrate (10) and a metal layer (30) are bonded together to each other through a titanium nitride layer (20).
摘要:
A method for manufacturing a ceramic substrate having a via hole and a surface wiring pattern to which the via hole is electrically connected. The method comprises a step of preparing a sintered ceramic substrate having a via hole, a step of forming a sintered ceramic layer having a hole or an opening portion whose bottom is constituted of at least part of the exposed end surface of the via hole on the sintered ceramic substrate by the post-fire method, a step of forming a conductive portion electrically connecting the surface of the sintered ceramic layer and the via hole in the hole or opening portion, and a step of forming a surface wiring pattern electrically connecting to the conductive portion on the surface of the sintered ceramic layer. With this, even if a sintered ceramic substrate is manufactured by the co-fire method, the position of the connection between the via hole and the surface wiring pattern can be controlled with high precision, any problem such as short-circuit is not caused, and a fine wiring pattern with high precision can be formed on a ceramic substrate.
摘要:
A stable, high output is obtained with an anion exchange membrane-type fuel cell that generates electricity when air is supplied. Disclosed is an operating method for an anion exchange membrane-type fuel cell that includes an anion exchange membrane electrode assembly for which an anode is joined to one surface of a anion exchange membrane and a cathode is joined to the other surface, and air is supplied to said cathode, wherein air with a reduced carbon dioxide concentration in the atmosphere is supplied to said cathode by a low carbon dioxide air supply system that supplies air with the reduced carbon dioxide concentration to said cathode.
摘要:
A chromene compound represented by the following formula (1):
wherein R 1 and R 2 are each independently an alkyl group having 1 to 9 carbon atoms, cycloalkyl group having 3 to 12 carbon atoms, perfluoroalkoxy group having 1 to 6 carbon atoms, aralkyl group having 7 to 11 carbon atoms, aralkoxy group having 7 to 11 carbon atoms, aryl group having 6 to 10 carbon atoms, aryloxy group having 6 to 10 carbon atoms or alkoxy group having 1 to 6 carbon atoms, with the proviso that R 1 and R 2 cannot be alkoxy groups having 1 to 6 carbon atoms at the same time; R 3 and R 4 are each independently a hydrogen atom, hydroxyl group, alkyl group having 1 to 9 carbon atoms, cycloalkyl group having 3 to 12 carbon atoms, alkoxy group having 1 to 6 carbon atoms, aralkyl group having 7 to 11 carbon atoms, aralkoxy group having 7 to 11 carbon atoms, aryl group having 6 to 10 carbon atoms or aryloxy group having 6 to 10 carbon atoms; R 1 and R 3 or R 2 and R 4 may be bonded together to form an alkylene group or alkylenedioxy group; R 5 and R 6 are each independently a hydroxy group, alkyl group having 1 to 9 carbon atoms, cycloalkyl group having 3 to 12 carbon atoms, alkoxy group having 1 to 6 carbon atoms, aralkyl group having 7 to 11 carbon atoms, aralkoxy group having 7 to 11 carbon atoms, aryl group having 6 to 10 carbon atoms, aryloxy group having 6 to 10 carbon atoms, cyano group, nitro group, halogen atom, halogenoalkyl group having 1 to 6 carbon atoms or halogenoalkoxy group having 1 to 6 carbon atoms, and m and n are each independently an integer of 0 to 4. The chromene compound is rarely deteriorated by exposure.