摘要:
The present invention relates to the method for producing a nonionic surfactant, including the step (I) of reacting alcohol having a water content of not more than 0.1% by mass with ethylene oxide to obtain ethylene oxide-adduct, the step (II) of reacting the ethylene oxide-adduct with propylene oxide to obtain the alkylene oxide-adduct having a content of remaining propylene oxide of not more than 1000 mg/kg, and the step (III) of reacting the alkylene oxide-adduct with ethylene oxide to obtain the nonionic surfactant having each content of remaining ethylene oxide and remaining propylene oxide of not more than 5 mg/kg.
摘要:
The present invention provides the nonionic surfactant represented by the formula (1): R—O—(PO)m-(EO)n—H (1) wherein, R represents a saturated linear-chain hydrocarbon group having 8 to 18 carbon atoms, and n-octyl groups are 20 to 80% by mole of the saturated linear-chain hydrocarbon groups, n-decyl groups are 0 to 10% by mole of the saturated linear-chain hydrocarbon groups, and saturated linear-chain hydrocarbon groups having 12 to 18 carbon atoms are 20 to 80% by mole of the saturated linear-chain hydrocarbon groups; PO represents a propyleneoxy group; EO represents an ethyleneoxy group; m represents an average addition mole number of propyleneoxy groups ranging from 0.1 to 5; n represents an average addition mole number of ethyleneoxy groups ranging from 0.5 to 20; and (PO)m and (EO)n are bonded as blocks in this order.
摘要:
The present invention provides the nonionic surfactant represented by the formula (1): R—O-(PO)m-(EO)n-H (1) wherein, R represents a saturated linear-chain hydrocarbon group having 8 to 18 carbon atoms, and n-octyl groups are 20 to 80% by mole of the saturated linear-chain hydrocarbon groups, n-decyl groups are 0 to 10% by mole of the saturated linear-chain hydrocarbon groups, and saturated linear-chain hydrocarbon groups having 12 to 18 carbon atoms are 20 to 80% by mole of the saturated linear-chain hydrocarbon groups; PO represents a propyleneoxy group; EO represents an ethyleneoxy group; m represents an average addition mole number of propyleneoxy groups ranging from 0.1 to 5; n represents an average addition mole number of ethyleneoxy groups ranging from 0.5 to 20; and (PO)m and (EO)n are bonded as blocks in this order.
摘要:
A method of fabricating a nitride semiconductor includes the steps of forming a nitride semiconductor doped with a p-type impurity, treating the surface of the nitride semiconductor in an atmosphere containing active oxygen to remove carbon remaining on the surface and form an oxide film thereon, and activating the p-type impurity to turn the conductive type of the nitride semiconductor into a p-type. Since carbon remaining on the surface of the nitride semiconductor is removed and the oxide film is formed thereon, the surface of the nitride semiconductor is prevented from being deteriorated by the activating treatment and the rate of activating the p-type impurity is enhanced. As a result, it is possible to reduce the contact resistance of the nitride semiconductor with an electrode and, hence, the variation in characteristics of the nitride semiconductor.
摘要:
A surface-emitting semiconductor light emitting device comprises an n-type ZnSe buffer layer, n-type ZnSSe layer, n-type ZnMgSSe cladding layer, n-type ZnSSe waveguide layer, active layer, p-type ZnSSe waveguide layer, p-type ZnMgSSe cladding layer, p-type ZnSSe layer,p-type ZnSe contact layer, p-type ZnSe/ZnTe MQW layer and p-type ZnTe contact layer, sequentially stacked on an n-type GaAs substrate. A grid-shaped p-side electrode and a Au film convering the p-side electrode are provided on the p-type ZnTe contact layer. An n-side electrode is provided on the back surface of the n-type GaAs substrate. The active layer has a single quantum well structure or a multiple quantum structure including ZnCdSe quantum well layers.
摘要:
Provided are a process for producing a phosphate and a process for stabilizing a phosphate, the phosphate being an acid-form phosphate wherein an organic hydroxy compound is an alkylene oxide adduct. A production process of a phosphate and a stabilization process of a phosphate, including the step 1 of reacting an organic hydroxy compound represented by the following general formula (I) with a phosphorylating agent: R1—O—(AO)n—H (I) wherein R1 represents a straight or branched alkyl group or alkenyl group having 6 to 36 carbon atoms, AO represents an oxyalkylene group having 2 to 4 carbon atoms, and n is a number of 0.1 to 100 on the average; the step 2 of purifying the reaction product obtained in the step 1 until the content of the organic hydroxy compound that has not yet reacted becomes 2% or less by weight; and the step 3 of adding water to the purified product obtained in the step 2 at such a ratio that the content of water in the final product is from 0.5 to 10% by weight.
摘要:
Disclosed is a nitride based III-V group compound semiconductor laser device of ridge waveguide type with an oscillation wavelength of about 410 nm which has a low driving voltage, a high half-width value θ// of a FFP in a direction horizontal to a hetero interface, and a high kink level (i.e., good light output-injected current characteristics over the high-output range). This laser device is similar in structure to the related-art semiconductor laser device except for the current constricting layer formed in a ridge. It has a stacked film composed of an SiO2 film (600 Å thick) and an amorphous Si film (300 Å thick) which are formed on the SiO2 film by vapor deposition. The stacked film covers both sides of the ridge and a p-AlGaN cladding layer extending sideward from the base of the ridge. The SiO2 film and Si film have respective thicknesses which are established such that the absorption coefficient of fundamental horizontal lateral mode is larger than the absorption coefficient of primary horizontal lateral mode. This structure results in a higher kink level, while suppressing the high-order horizontal lateral mode, a larger effective refractive index difference Δn, and a larger value of θ// without the necessity for reducing the ridge width.
摘要:
A GaN compound semiconductor laser includes an AlGaN buried layer which buries opposite sides of a ridge stripe portion formed on a p-type AlGaN cladding layer. The AlGaN buried layer is made by first patterning an upper part of the p-type AlGaN cladding layer and a p-type GaN contact layer into a ridge stripe configuration by using a SiO2 film as an etching mask, then growing the AlGaN buried layer non-selectively on the entire substrate surface to bury both sides of the ridge stripe portion under the existence of the SiO2 film on the ridge stripe portion, and thereafter selectively removing the AlGaN buried layer from above the ridge stripe portion by etching using the SiO2 film as an etching stop layer. Thus, the GaN compound semiconductor laser is stabilized in the transverse mode, intensified in output power, and improved in lifetime.
摘要:
A II-VI group compound semiconductor light-emitting device can emit light of a short wavelength at room temperature. Operation characteristics, such as current--voltage characteristics and current--light output characteristics can be stabilized and a life of this semiconductor light-emitting device can be extended. The semiconductor light-emitting device comprises a substrate (1), at least a first cladding layer (2) of a first conductivity type, an active layer (3) and a second cladding layer (4) of a second conductivity type, wherein at least the active layer (3) is made of a II-VI group compound semiconductor and the active layer (3) is doped by either or both of n-type and p-type dopants.
摘要:
The invention provides a soil release agent and a detergent composition blended therewith. The invention relates to a crosslinked product obtained by reacting a compound having 2 to 32 hydroxyl groups, such as triethanol amine, with a compound having at least two functional groups reacting with hydroxyl groups, such as (poly)ethylene glycol diglycidyl ether, a soil release agent containing the crosslinked product, and a detergent composition containing the soil release agent.