Abstract: A novel monofunctional monomer having a cage oligosiloxane structure is represented by formula (1) wherein X is a polymerizable oxygen-containing C1-C40 group, R1 is a C1-C20 saturated hydrocarbon group, C6-C20 aromatic hydrocarbon group, C1-C20 organoxy group or halogen atom, and R is a non-polymerizable monovalent C1-C40 hydrocarbon group which is optionally halogenated. The monomer has improved compatibility with various solvents and polymerizable monomers. A method for preparing the same is also provided.

Abstract: An organosilicon compound having an amino group is provided. This compound is represented by the following general formula (1): wherein R1 and R2 respectively represent an unsubstituted or substituted aliphatic monovalent hydrocarbon group containing 1 to 10 carbon atoms with the proviso that the R1 and R2 may together form a ring with the nitrogen atom to which they are bonded, and that R1 and R2 may contain a heteroatom; R3 and R4 independently represent an unsubstituted or substituted monovalent hydrocarbon group containing 1 to 10 carbon atoms; and n represents an integer of 0 to 2. Use of this compound enables production of a polymer product having excellent mechanical properties, high heat resistance, and high transparency. The solution of this compound is stable, and can be stored for a long time, and when used for a polymer modifying agent, it facilitates introduction of amino group and hydroxy group.

Abstract: High-purity trimethylaluminum has the following impurity contents: organosilicon components?0.5 ppm, chlorine components?20 ppm, hydrocarbon components?1,000 ppm, Ca?0.05 ppm, Fe?0.05 ppm, Mg?0.05 ppm, Na?0.05 ppm, Si (Si components other than the organosilicon components)?0.07 ppm, Zn?0.05 ppm, and S?0.05 ppm. The high-purity trimethylaluminum can be obtained by removing impurities from crude trimethylaluminum through distillation and evaporation.

Abstract: A method of purifying an organometallic compound comprising distilling the organometallic compound for purification while blowing an inert gas through a vapor of the organopolysiloxane, thereby removing from the organometallic compound an impurity having a higher vapor pressure than the organometallic compound.

Abstract: A novel monofunctional monomer having a cage oligosiloxane structure is represented by formula (1) wherein X is a polymerizable oxygen-containing C1-C40 group, R1 is a C1-C20 saturated hydrocarbon group, C6-C20 aromatic hydrocarbon group, C1-C20 organoxy group or halogen atom, and R is a non-polymerizable monovalent C1-C40 hydrocarbon group which is optionally halogenated. The monomer has improved compatibility with various solvents and polymerizable monomers. A method for preparing the same is also provided.

Abstract: A contaminated Group III metal hydrocarbon is purified by providing an adduct of Group III metal hydrocarbon with a Lewis base in a solvent having a boiling point which is up to 200° C., but at least 30° C. higher than the boiling point of the Group III metal hydrocarbon, separating the solvent from the adduct, and heating the adduct for thermal dissociation, thereby releasing the Group III metal hydrocarbon in high purity form.

Abstract: A seatbelt-fastening prompting apparatus which includes; a seatbelt fastening detector for detecting whether a seatbelt is fastened or unfastened; a vibrator for vibrating a steering wheel; and a controller for activating the vibrator when an ignition switch is turned on and the seatbelt fastening detector detects the seatbelt as being unfastened.

Abstract: High-purity trimethylaluminum has the following impurity contents: organosilicon components?0.5 ppm, chlorine components?20 ppm, hydrocarbon components?1,000 ppm, Ca?0.05 ppm, Fe?0.05 ppm, Mg?0.05 ppm, Na?0.05 ppm, Si (Si components other than the organosilicon components)?0.07 ppm, Zn?0.05 ppm, and S?0.05 ppm. The high-purity trimethylaluminum can be obtained by removing impurities from crude trimethylaluminum through distillation and evaporation.

Abstract: A method of purifying an organometallic compound comprising distilling the organometallic compound for purification while blowing an inert gas through a vapor of the organopolysiloxane, thereby removing from the organometallic compound an impurity having a higher vapor pressure than the organometallic compound.

Abstract: Trialkylgallium is prepared by reacting a gallium halide or alkyl gallium with trialkylaluminum in a solvent having a boiling point which is at least 10° C. higher than the boiling point of the trialkylgallium, such as mesitylene or o-dichlorobenzene. High purity alkyl gallium is obtained in high yields.

Abstract: A contaminated Group III metal hydrocarbon is purified by providing an adduct of Group III metal hydrocarbon with a Lewis base in a solvent having a boiling point which is up to 200° C., but at least 30° C. higher than the boiling point of the Group III metal hydrocarbon, separating the solvent from the adduct, and heating the adduct for thermal dissociation, thereby releasing the Group III metal hydrocarbon in high purity form.

Abstract: Trialkylgallium is prepared by reacting a gallium halide or alkyl gallium with trialkylaluminum in a solvent having a boiling point which is at least 10° C. higher than the boiling point of the trialkylgallium, such as mesitylene or o-dichlorobenzene. High purity alkyl gallium is obtained in high yields.

Abstract: A seatbelt-fastening prompting apparatus which includes; a seatbelt fastening detector for detecting whether a seatbelt is fastened or unfastened; a vibrator for vibrating a steering wheel; and a controller for activating the vibrator when an ignition switch is turned on and the seatbelt fastening detector detects the seatbelt as being unfastened.

Abstract: A retainer case (4) has a lower portion (4a) defining a gas diffusion chamber (5), and an upper portion (4c) cooperating with an intermediate portion (4b) to define an accommodation chamber (6), a diffuser member (15) separates the gas diffusion chamber (5) from the air bag accommodation chamber (6), with gas communication allowed therebetween through a gas inlet (16) of the diffuser member (15), an infaltor (11) is disposed in the gas diffusion chamber (5), an airbag (8) is accommodated in the accommodation chamber (6), having a retained part (8b) in a space (S1) between the intermediate portion (4b) and the diffuser member (15), and an inward projection (18) of the intermediate portion (4b) and an inward projection (17) of the diffuser member (15) constitute a gas invasion restricting structure (17+18) for restricting a gas invasion from the gas diffusion chamber (5) into the space (S1).

Abstract: A retainer case (4) has a lower portion (4a) defining a gas diffusion chamber (5), and an upper portion (4c) cooperating with an intermediate portion (4b) to define an accommodation chamber (6), a diffuser member (15) separates the gas diffusion chamber (5) from the air bag accommodation chamber (6), with gas communication allowed therebetween through a gas inlet (16) of the diffuser member (15), an infaltor (11) is disposed in the gas diffusion chamber (5), an airbag (8) is accommodated in the accommodation chamber (6), having a retained part (8b) in a space (S1) between the intermediate portion (4b) and the diffuser member (15), and an inward projection (18) of the intermediate portion (4b) and an inward projection (17) of the diffuser member (15) constitute a gas invasion restricting structure (17+18) for restricting a gas invasion from the gas diffusion chamber (5) into the space (S1).