摘要:
Provided is a process for producing a copolymer of diallyldialkylammonium salt and a maleic acid which copolymer is free of residual monomers and polymerization initiator and hence stably exhibits excellent performances in various uses, and the process comprises polymerizing a monomer mixture comprising diallyldialkylammonium salt and maleic acid in the presence of persulfate as a radical polymerization initiator in water or a polar solvent, and completion of the polymerization-reaction, decomposing the radical polymerization initiator to produce a copolymer comprising diallyldialkylammonium salt constituent unit and a maleic acid constituent unit.
摘要:
Provided is a process for producing a copolymer of diallyldialkylammonium salt and a maleic acid which copolymer is free of residual monomers and polymerization initiator and hence stably exhibits excellent performances in various uses, and the process comprises polymerizing a monomer mixture comprising diallyldialkylammonium salt and maleic acid in the presence of persulfate as a radical polymerization initiator in water or a polar solvent, and completion of the polymerization-reaction, decomposing the radical polymerization initiator to produce a copolymer comprising diallyldialkylammonium salt constituent unit and a maleic acid constituent unit.
摘要:
Disclosed are a process for the production of a low-molecular-weight allylamine polymer having a weight average molecular weight of 250 to 4,000 or an addition salt thereof, which comprises distilling a low-molecular-weight allylamine polymer solution to distill off unreacted monoallylamine, then, subjecting a residue to electrodialysis, and optionally carrying out acid treatment, a low-molecular-weight allylamine polymer having an ignition residue content of 5% by weight or less and a weight average molecular weight of 250 to 4,000, or an addition salt of a low-molecular-weight allylamine polymer having said properties, a water-resistance-imparting agent for use in an ink which comprises the above polymer or addition salt, and an ink composition comprising a colorant and the above water-resistance-imparting agent. According to the process of the present invention, a low-molecular-weight allylamine polymer improved in coloring and almost free of an inorganic salt or an addition salt thereof can be efficiently obtained. Further, the ink composition comprising the low-molecular-weight allylamine polymer or the salt thereof, provided by the present invention, not only has high water resistance but also is excellent in shelf life, and it is suitably used for inkjet recording.
摘要:
A diving jacket includes a back-plate 22 and a pair of waist belt members respectively having circumferentially rear end regions fixed to the back-plate 22 by a means of associated connector plates 31. Rear end regions 37 of the respective connector plates 31 are formed with a plurality of dovetail tenons 51 or a plurality of dovetail grooves 52 arranged in vertical direction of the connector plates 31 so as to extend in parallel one to another and the back-plate 22 is formed with much more dovetail grooves 52 or dovetail tenons 51 than those formed in the connector plates 31 so as to be operatively associated with the dovetail tenons 51 or dovetail grooves 52 of the connector plates 31, respectively.
摘要:
A snorkel which includes a main conduit having an upper opening as well as a lower opening and a branch conduit branched from the main conduit. The branch conduit is formed at its top with a mouthpiece and a proximal end of the branch pipe is introduced into the main conduit, then curved toward the upper opening, and thereby eliminates swimmer physical fatigue due to purge diving use of the snorkel.
摘要:
A mobile phone apparatus 10 is equipped with a camera module 36 including an image sensor (52), an AE evaluation circuit (60), etc. When a camera function is executed, an exposure is adjusted such that an exposure evaluated value is equal to an exposure target value, whereby, an AF controlling processing is executed. For example, when a shutter key is operated, the exposure target value is changed to an exposure target value for AF control being smaller than an exposure target value for normal photographing. Furthermore, a frame rate is increased such that the exposure evaluated value having a correlation to the frame rate is smaller than the exposure target value in response to the change of the exposure target value. Then, the AF controlling processing is executed on the basis of the image data every frame output from the image sensor (52) at the increased frame rate.
摘要:
[Problem to be Solved] To provide a method of well filling copper in a non-through hole on a conductivity-rendered substrate by using a copper plating bath containing fewer additives.[Means for Solving the Problem] A method of filling copper in a non-through hole on a substrate that has been treated to render it conductive, which comprises plating said substrate in an acidic copper plating bath comprising a water-soluble copper salt, sulfuric acid and a filling additive that is a polymer having the activities of both of a brightener and a leveler.
摘要:
A diving jacket 1 includes a back-plate 22, shoulder belts 6 and a waist belt 7. The waist belt 7 includes a pair of belt members 32, 33 each having a circumferentially rear end region 46 is fixed to an associated connector plate 31 made of a material harder than the belt 7 and disposed between the rear end region 46 and the back-plate 22. A lower end region 34 of the shoulder bent 6 also is fixed to the associated connector plate 31.
摘要:
A chopper compare circuit of an A-D converter implemented through a semiconductor integrated circuit is provided with a series-connected body of a plurality of MOS capacitors to which the voltage of an analog signal and a reference voltage are alternately applied. A-D conversion errors resulting from change of the capacitances of the MOS capacitors depending on voltages between both electrodes thereof are reduced. A MOS capacitor is connected in parallel with or disconnected from a MOS capacitor, in response to a voltage across electrodes of a MOS capacitor.
摘要:
The present invention is directed to a system for automatically shifting a measuring range equipped in a surface area measuring device. The system for automatically shifting the measuring range is provided with an output value determining circuit receives a signal for detecting a flow rate of supply gases to be outputted from means for measuring a flow rate of supply gases for detecting an amount of the supply gases to be supplied to a sample cell and a signal for detecting a flow rate of discharge gases of the discharge gases to be outputted from means for measuring a flow rate of the discharge gases for detecting an amount of the discharge gases to be discharged from the sample cell, generates a signal for shifting the gain of an amplifier to a low level during a period for desorption of the gases when a differential signal to be outputted from the amplifier for amplifying the difference between the signal for detecting the flow rate of the supply gases and the signal for detecting the flow rate of the discharge gases, and generates a shift signal for shifting the gain of the amplifier to a high level during a period for desorption when the differential signal to be outputted from the amplifier is smaller than a value set for the gain of the amplifier.