摘要:
A magnesium oxide having a cubic system needle-like crystal structure and a length-to-diameter ratio, determined by an electron microscope at a magnification of 10,000, of at least about 5; and a process for producing a magnesium oxide having a cubic system needle-like crystal structure, which comprises calcining a basic magnesium compound having a needle-like crystal structure expressed by the following formulaMg(OH).sub.2-nx A.sub.x.sup.n-.mH.sub.2 Owherein A.sup.n- represents a monovalent (n=1) to tetravalent (n=4) anion, x is 0.2.ltoreq.x.ltoreq.0.5, and m is 0
摘要:
Slaked lime (calcium hydroxide) is obtained by contacting quicklime (calcium oxide) with an aqueous solution containing at least one anion selected from the group consisting of Cl, Br and NO.sub.3 ions in a concentration of about 0.1 to about 5 mole/liter at a temperature of about 10.degree. C. to about 65.degree. C. Magnesium hydroxide can be produced by reacting the aforesaid slaked lime with magnesium chloride or magnesium nitrate in an aqueous medium, the amount of slaked lime being about 0.5 to about 0.95 equivalent per equivalent of the magnesium compound, and thereafter heat-trating the reaction product in an aqueous medium at a temperature of about 150.degree. C. to about 250.degree. C.
摘要:
A fire-retarding thermoplastic resin composition comprising (A) a thermoplastic resin, and (B) a fire-retarding amount of a hydrotalcite having a specific surface area, determined by the BET method, of not more than 30 m.sup.2 /g, the hydrotalcite being uncoated, or coated with an aqueous solution of an anionic surface active agent in a concentration of not more than 20 millimoles/liter in a thickness larger than a monolayer but up to a triple layer.
摘要:
A flame retardant produced by surface-treating magnesium hydroxide with a dialcohol amine salt of an alcohol phosphate ester represented by formula (1) ##STR1## wherein R represents an alkyl, alkenyl group or aralkyl having 10 to 30 carbon atoms, R' represents an alkylene group having 1 to 6 carbon atoms and n represents 1 or 2,and/or an alcohol phosphate ester or an alkali metal salt thereof represented by formula (2) ##STR2## wherein R and n represent the same meanings as in formula (1) and M represents an alkali metal and/or hydrogen, provided that when n=1, each of two M's may independently represent an alkali metal or hydrogen.and a resin composition containing the above flame retardant.
摘要:
The curable composition of this invention is a curable composition comprising 1 to 20 parts by weight of an organic peroxide and 0.0005 to 10 parts by weight of a redox reaction initiator containing at least one metal selected from copper, iron, lead, potassium, manganese, indium, nickel and cobalt per 100 parts by weight of a polysulfide polymer with a viscosity of 0.5 to 50 Pa·s at 25° C.The curable composition of this invention has good curing properties. The cured material obtained by curing the curable composition of this invention is not swollen or does not decline in strength even if it is immersed in hot water for a long period of time, showing good water resistance.The curable composition of this invention can be suitably used as a sealant of double glazings, aircraft, civil engineering and architecture.
摘要:
A personal information management apparatus acquires associated information that is associated with target information for which transmission has been requested, and if the acquired associated information includes personal information, transmits the target information after modifying the associated portions of the target information. This structure enables improving protection of personal information by protecting not only personal information but also information that cannot be used independently to identify a person but can be easily correlated with other information and used to identify a specific individual with reference to the other information.
摘要:
An electromagnetic wave measurement system includes an electromagnetic wave emitting unit, measurement condition changing unit for changing a measurement condition, a control unit controlling the electromagnetic wave emitting unit and the measurement condition changing unit based on actual measurement data of the object electronic circuit, which data has previously been measured under a predetermined measurement condition, and measurement condition data of the predetermined measurement condition in such a manner that electromagnetic waves resembling those of the object electronic circuit is emitted from the electromagnetic wave emitting unit under the same condition as the predetermined measurement condition. With this system, since the electromagnetic wave emitting unit emits electromagnetic waves exactly resembling those of electronic circuits constitute an electronic device, it is possible to perform the electromagnetic wave measurement as if all the electronic circuits are collected even when all the electronic circuits are not collected.
摘要:
A personal information management apparatus acquires associated information that is associated with target information for which transmission has been requested, and if the acquired associated information includes personal information, transmits the target information after modifying the associated portions of the target information. This structure enables improving protection of personal information by protecting not only personal information but also information that cannot be used independently to identify a person but can be easily correlated with other information and used to identify a specific individual with reference to the other information.
摘要:
An electric blower includes an electric motor having a rotating shaft and an impeller fixed to the rotating shaft for rotation. The impeller has a rear shroud fixed to the rotating shaft, a front shroud which faces the rear shroud and has an inlet hole to take in air, a plurality of blades disposed between the rear shroud and the front shroud, and an inducer which streamlines air flowing from the inlet hole and has a three dimensional-shaped vane. The inducer is formed separately from the blade and is disposed between the rear shroud and the front shroud, whereby an electric blower that is simple in structure, lower in clearance between parts, higher in strength, and lower in air loss is realized. Also, a practicable vacuum cleaner high in sucking performance is realized by the utilization of the electric blower.