摘要:
A silane copolymer is described which is usable, for example, as an ingredient of cosmetics for skin, hair or the like; obtainable by polycondensing one or more organic silane compounds having a hydrophilic group represented by the following general formula (I): R1(3-m)Si(OH)mA—B (I) wherein m represents 2 or 3, R1 represents an alkoxy group, a hydrogen atom or an alkyl group, A is a connecting moiety and represents a methylene group or the like, and B represents a hydrophilic organic group with one or more silane compounds represented by the following general formula (III): R2nSi(OH)pY(4-p-n) (III) wherein n represents an integer from 0 to 2, p represents an integer from 2 to 4, n+p≦4, R2 represents an organic group in which a carbon atom is directly connected to the silicon atom, and Y represent at least one group selected from the group consisting of an alkoxy group, hydrogen atom and siloxy group and when 4-p-n is 2; and optionally further reacting the resulting copolymer with one or more silane compounds represented by the following general formula (V): R33Si(OH) (V) wherein, R3 represent an organic group in which a carbon atom is directly connected to the silicon atom. A method for producing the same is also described.
摘要翻译:描述了可用于例如皮肤,头发等的化妆品成分的硅烷共聚物; 通过缩聚一种或多种具有由以下通式(I)表示的亲水基团的有机硅烷化合物获得:其中m表示2或3,R 1表示烷氧基,氢原子或烷基,A是连接部分, 表示亚甲基等,B表示具有一个或多个由以下通式(III)表示的硅烷化合物的亲水性有机基团:其中n表示0至2的整数,p表示2至4的整数, n + p <= 4,R2表示碳原子与硅原子直接连接的有机基团,Y表示选自烷氧基,氢原子和甲硅烷氧基中的至少一种基团,当4 -pn为2; 并且任选地进一步使所得共聚物与由以下通式(V)表示的一种或多种硅烷化合物反应:其中,R 3表示碳原子直接与硅原子连接的有机基团。 还描述了其制造方法。
摘要:
A base materials for cosmetics which comprises a silylated peptide of the formula (I): ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are the same or different and each is methyl group or hydroxyl group, R.sup.4 is a group bonding the terminal amino group in a side chain of a basic amino acid to the .alpha.-carbon atom wherein the side chain --R.sup.4 NH.sub.2 may partly form an N-heterocyclic ring, R.sup.5 is a side chain of an amino acid other than the above basic amino acid, A is methylene, propylene, --CH.sub.2 OCH.sub.2 CH(OH)CH.sub.2 -- or --(CH.sub.2).sub.3 OCH.sub.2 CH(OH)CH.sub.2 -- group, m is 0 to 100, n is 0 to 100, and m+n is 1 to 100, provided that m and n only show the number of amino acid units, but not amino acid sequence. The silylated peptide (I) is very useful as an additive for hair and skin cosmetics, particularly for aqueous cosmetics, and have excellent pH and storage stabilities and excellent properties such as gloss and moisture impartment to hairs and skins, improvement of combability of hairs, prevention of hairs from being damaged, restoration of damaged hairs, smoothing skin, and the like.
摘要:
A successive approximation register analog-to-digital converter includes: a digital-to-analog converter to generate an analog voltage based on an input voltage sampled in accordance with a sampling clock and a digital code; a comparator to receive the analog voltage; a controller to generate the digital code based on an output of the comparator; a delay circuit to delay a signal based on the output of the comparator and to feed back the delayed signal to a reset terminal of the comparator; an adjustment circuit to count a number of edges of a signal generated in a loop that feeds back the delayed signal, and to adjust an amount of delay of the delay circuit based on a count value; and a sampling clock generation circuit to generate the sampling clock based on the signal generated in the loop and the external clock signal.
摘要:
A method for regenerating a titanosilicate catalyst, comprising a step of mixing a titanosilicate having reduced catalytic ability with a cyclic secondary amine, and a method for producing an oxirane compound, which comprises a step of reacting hydrogen peroxide with a C2-C12 compound having a carbon-carbon double bond, in the presence of a titanosilicate catalyst obtained by the regeneration method.
摘要:
A successive approximation register analog-to-digital converter includes: a digital-to-analog converter that generates an analog voltage based on a digital code; a comparator that receives the analog voltage; a control circuit that generates a digital code of an input voltage sampled from an external clock signal by successively changing the digital code based on a comparison result of the comparator; a delay circuit that resets the comparator based on a signal transition generated by delaying the comparison result; and an adjustment circuit that counts a value indicating a number of the signal transition being generated during a cycle of the external clock signal and adjusts a delay of the delay circuit according to a counted value.
摘要:
A comparator circuit includes a first comparator comparing an input signal to a first comparison value and generating a first determination signal, a second comparator comparing the input signal to a second comparison value different from the first comparison value and generating a second determination signal, and an output selecting circuit selecting a signal generated first from the first determination signal and the second determination signal, and outputting the selected signal as a determination signal.
摘要:
A successive approximation register analog-to-digital converter includes: a digital-to-analog converter that generates an analog voltage based on a digital code; a comparator that receives the analog voltage; a control circuit that generates a digital code of an input voltage sampled from an external clock signal by successively changing the digital code based on a comparison result of the comparator; a delay circuit that resets the comparator based on a signal transition generated by delaying the comparison result; and an adjustment circuit that counts a value indicating a number of the signal transition being generated during a cycle of the external clock signal and adjusts a delay of the delay circuit according to a counted value.
摘要:
A D/A converter includes plus-side and minus-side input terminals; plus-side and minus-side D/A converters each including plural plus-side or minus-side capacitors having capacitance values weighted by the powers of two, a plus-side or minus-side output terminals connected to first electrodes of the plus-side or minus-side capacitors, and plural plus-side or minus-side switches for connecting each second electrode of the plus-side or minus-side capacitors to either the plus-side or minus-side input terminal, a plus-side reference voltage terminal or a minus-side reference voltage terminal according to plus-side or minus-side control digital signals; and plural short-circuit switches provided between identically weighted plus-side and minus-side capacitors respectively. And, at the time of sampling, the plus-side and minus-side switches connect the second electrodes of the capacitors to the plus-side and minus-side input terminals, respectively, and, after the sampling, the plurality of short-circuit switches short-circuit between the second electrodes of the plus-side and minus-side capacitors.
摘要:
A method for manufacturing a preform from a nano composite resin that includes a thermoplastic resin containing inorganic fine particles, the preform being a pre-finish product of an optical member having an optical surface formed by press molding, is provided. The method includes: supplying a solution including the nano composite resin and a solvent into a mold which has an approximate optical surface closely resembling the optical surface and an opening to an atmosphere; and evaporating the solvent while a shape of the approximate optical surface is kept, to solidify the solution.
摘要:
A solenoid valve includes an electromagnetic drive unit for generating a magnetomotive force when being fed with electric power. There are a controlled-fluid passage and an accommodation chamber containing the electromagnetic drive unit. A partition wall defines a part of the controlled-fluid passage. A valve opening extends through the partition wall. A shaft extending through the valve opening is driven by the electromagnetic drive unit. A valve member fixed to the shaft moves into and out of contact with the partition wall to block and unblock the valve opening in accordance with movement of the shaft. A thin-film sealing member made of rubber-based resilient material operates for airtightly separating the controlled-fluid passage and the accommodation chamber from each other. A communication passage connects the accommodation chamber and an exterior. An orifice provides a smaller effective cross-sectional area of the communication passage.