摘要:
An object of the present invention is to provide a method for producing a cross-linked polyvinyl acetal resin, which can provide a cross-linked polyvinyl acetal resin having high mechanical strength and excellent solvent resistance by a simple method without a cross-linking agent, and can solve such problems as sheet attack, insufficient strength, and instability of viscosity for a long-time storage, and another object of the present invention is to provide a cross-linked polyvinyl acetal resin produced by the above method for producing a cross-linked polyvinyl acetal resin. The method for producing a cross-linked polyvinyl acetal resin comprises the step of irradiating a polyvinyl acetal resin at least having structural units represented by the following formulas (1) to (4) with ultraviolet light having a wavelength in a range of 200 to 365 nm, wherein R1 represents a hydrogen atom or a C1-C20 hydrocarbon group; and R2 represents a group having two or more functional groups, the two or more functional groups each selected from the group consisting of the functional groups represented by the following formulas (5), (6), and (7).
摘要:
An object of the present invention is to provide a method for producing a cross-linked polyvinyl acetal resin, which can provide a cross-linked polyvinyl acetal resin having high mechanical strength and excellent solvent resistance by a simple method without a cross-linking agent, and can solve such problems as sheet attack, insufficient strength, and instability of viscosity for a long-time storage, and another object of the present invention is to provide a cross-linked polyvinyl acetal resin produced by the above method for producing a cross-linked polyvinyl acetal resin. The method for producing a cross-linked polyvinyl acetal resin comprises the step of irradiating a polyvinyl acetal resin at least having structural units represented by the following formulas (1) to (4) with ultraviolet light having a wavelength in a range of 200 to 365 nm, wherein R1 represents a hydrogen atom or a C1-C20 hydrocarbon group; and R2 represents a group having two or more functional groups, the two or more functional groups each selected from the group consisting of the functional groups represented by the following formulas (5), (6), and (7).
摘要:
It is an object of the present invention to provide a polyvinyl acetal resin composition capable of giving a ceramic green sheet which has sufficient flexibility and is hardly damaged even when being formed into a thin film and comprises a polyvinyl acetal resin composition containing a polyvinyl acetal resin A and a polyvinyl acetal resin B incompatible with the polyvinyl acetal resin A, which is formed by acetalizing a mixed polyvinyl alcohol containing two or more kinds of polyvinyl alcohols wherein a phase composed of the polyvinyl acetal resin A and a phase composed of the polyvinyl acetal resin B form a sea-island structure.
摘要:
It is an object of the present invention to provide a polyvinyl acetal resin composition capable of giving a ceramic green sheet which has sufficient flexibility and is hardly damaged even when being formed into a thin film, when the polyvinyl acetal resin composition is used as a binder for a ceramic green sheet. It is another object of the present invention to provide a ceramic slurry, a ceramic paste, a ceramic green sheet, a conductive paste and an interlayer film for laminated glass for automobiles, each produced by using the polyvinyl acetal resin composition.The present invention pertains to a polyvinyl acetal resin composition containing a polyvinyl acetal resin A and a polyvinyl acetal resin B incompatible with the polyvinyl acetal resin A, which is formed by acetalizing a mixed polyvinyl alcohol containing two or more kinds of polyvinyl alcohols having different saponification degrees, and wherein the mixed polyvinyl alcohol contains main two kinds of polyvinyl alcohols in which X and Y satisfy the relationship of the following equation (1): [Formula 1] |X−Y|≧10 (1) in which X represents the saponification degree of any one polyvinyl alcohol a of the polyvinyl alcohols contained in the mixed polyvinyl alcohol and Y represents the saponification degree of a polyvinyl alcohol b other than the polyvinyl alcohol a, and wherein in denoting, by M, the polymerization degree of one polyvinyl alcohol having a higher polymerization degree of the main two kinds of polyvinyl alcohols and denoting the polymerization degree of the other polyvinyl alcohol by N, M and N have the relationship of the following equation (2): [Formula 2] M/N≦3 (2) and a phase composed of the polyvinyl acetal resin A and a phase composed of the polyvinyl acetal resin B form a sea-island structure.
摘要:
An electronic device having a plurality of operation keys, a position sensor, a keyboard layout controller and a keyboard illumination controller is provided. The operation keys are configured to form a reconfigurable keyboard layout. The keyboard layout controller is configured to reconfigure the keyboard layout in accordance with the position of the electronic device sensed by the position sensor. The keyboard illumination controller is configured to illuminate one of the operation keys being usable in the keyboard layout after the reconfiguration.
摘要:
Along the column of bonding pad (1), bidding terminal portions (2c), (3c), (4a), (5a) of bus bars (2), (3), and signal lines (4), (5) are arranged; principal wiring portions (2a), (3a) are made to extend in a 3-dimensional crossing configuration with respect to the signal lines, and they are connected to the bonding terminal portion of the bus bars, forming the IC package of the LOC type. Between the various bonding terminal portions and the various bonding pads, there exists no main wiring portion of the bus bar. Consequently, bonding wires (6), (7), (8), (9) do not straddle the bus bar principal wiring portion. As a result, when the bonding wire is not elevated, the bonding wire still does not make contact with the bus bar principal wiring portion to cause short circuit; as a result, the reliability is high and the device becomes thinner.
摘要:
A powder material for powder plasma build-up welding which exhibits excellent resistance and bending properties comprises C in an amount of 0.06 to 0.15% (% by weight, the same hereinafter), Si in an amount of 0.2 to 1.0%, Mn in an amount of 0.2 to 1.0%, Cr in an amount of 17 to 30%, Nb in an amount of 0.6 to 1.5%, Ni in an amount of not more than 0.5%, and the balance consisting of Fe and unavoidable impurities.
摘要:
Along the column of bonding pad (1), bonding terminal portions (2c), (3c), (4a), (5a) of bus bars (2), (3), and signal lines (4), (5) are arranged; principal wiring portions (2a), (3a) are made to extend in a 3-dimensional crossing configuration with respect to the signal lines, and they are connected to the bonding terminal portion of the bus bars, forming the IC package of the LOC type. Between the various bonding terminal portions and the various bonding pads, there exists no main wiring portion of the bus bar. Consequently, bonding wires (6), (7), (8), (9) do not straddle the bus bar principal wiring portion. As a result, when the bonding wire is not elevated, the bonding wire still does not make contact with the bus bar principal wiring portion to cause short circuit; as a result, the reliability is high and the device becomes thinner.
摘要:
A weld joint has a weld portion for being welded and bonded to a rim portion around an opening of a resin fuel tank. The weld portion is made of a resin alloy material that is obtained by alloying EVOH or PA with a modified HDPE. A highly-weldable layer is provided in an extremity portion of the weld portion throughout an entire circumference of the weld portion. The highly-weldable layer is made of HDPE and/or a modified HDPE having good weldability to the resin fuel tank. An extremity end surface of the highly-weldable layer serves as a weld surface for welding the weld portion to the resin fuel tank.
摘要:
An electronic circuit device wherein lines are provided to connect elements, and wherein a plurality of island shaped non-line parts, which do not have the function of the lines, are formed along the length of the lines.