Abstract: Provided is a light weight and remarkably flexible sheet-shaped radio wave absorber having excellent radio wave absorbing capacity in milliwave band frequencies. The invention is a milliwave band radio wave absorption sheet comprising a radio wave reflection layer (A), a radio wave absorption layer (B) disposed above the layer (A) so as to be parallel thereto, and a protective layer (C) disposed above the layer (B) so as to be parallel thereto. The layer (B) has, at a frequency of 79 GHz, a dielectric constant, wherein the real part is 10 to 20 and the absolute value of the imaginary part is 4 to 10. The layer (B) has a film thickness of 200 to 400 ?m. The absolute value of the imaginary part/real part from the dielectric constant is within a range of 0.30 to 0.60. The layer (C) has, at a frequency of 79 GHz, a dielectric constant, wherein the real part is 1.5 to 8.0 and the absolute value of the imaginary part is less than 1.0, and has a film thickness of 50 to 200 ?m.

Abstract: Provided is a light weight and remarkably flexible sheet-shaped radio wave absorber having excellent radio wave absorbing capacity in milliwave band frequencies. The invention is a milliwave band radio wave absorption sheet comprising a radio wave reflection layer (A), a radio wave absorption layer (B) disposed above the layer (A) so as to be parallel thereto, and a protective layer (C) disposed above the layer (B) so as to be parallel thereto. The layer (B) has, at a frequency of 79 GHz, a dielectric constant, wherein the real part is 10 to 20 and the absolute value of the imaginary part is 4 to 10. The layer (B) has a film thickness of 200 to 400 ?m. The absolute value of the imaginary part/real part from the dielectric constant is within a range of 0.30 to 0.60. The layer (C) has, at a frequency of 79 GHz, a dielectric constant, wherein the real part is 1.5 to 8.0 and the absolute value of the imaginary part is less than 1.0, and has a film thickness of 50 to 200 ?m.

Abstract: This invention provides a multilayer coating film-forming method which comprises applying a first clear paint onto a coating object, applying onto so formed first clear coating film which is either uncured or cured by heating, a second clear paint such that its heat-cured film thickness falls within a range of 2-15 ?m, and forming the second clear coating film, (a) the first clear paint and second clear paint comprising hydroxyl-containing resin as the base resin and polyisocyanate compound as the crosslinking agent, and (b) when the coating film formed by applying a paint to a cured film thickness of 40 ?m and curing it by heating at 140° C. for 30 minutes is measured of its dynamic viscoelasticity at a frequency of 11 Hz, the first clear paint forming the first clear coating film having a glass transition temperature of lower than 70° C. and tan? (=loss elastic modulus/storage elastic modulus) at 80° C. of less than 0.

Abstract: This invention provides an aqueous primer composition which comprises (A) an aqueous dispersion of modified polyolefin which comprises an unsaturated carboxylic acid- or acid anhydride-modified polyolefin (a) having a melting point of 120° C. or lower and a weight average molecular weight of 30,000 to 180,000, dispersed in an aqueous medium, (B) an ionic functional group-containing acrylic resin, and (C) a conductive carbon-containing pigment, and which forms a coating film with an L value of 35 or more and a surface resistivity of 1×108?/? or less.

Abstract: This invention provides a water-based primer composition characterized by comprising an aqueous dispersion formed by dispersing unsaturated carboxylic acid- or acid anhydride-modified polyolefin (a) having a melting point of 50-120° C. and a weight-average molecular weight within a range of 30,000-200,000, and unsaturated carboxylic acid- or acid anhydride-modified polyolefin (b) having a melting point of 30-100° C. and a weight-average molecular weight within a range of 30,000-200,000, in an aqueous medium, the melting point of the modified polyolefin (a) being higher than that of the modified polyolefin (b) by at least 10° C.

Abstract: An object of the present invention is to provide a coating composition capable of forming a cured coating film with excellent scratch resistance, acid resistance, stain resistance, and finished appearance. The present invention provides coating composition comprising (A) carboxy-containing polymer, (B) epoxy-containing acrylic resin, and (C) carboxy-containing reaction product with an acid value of 50 to 200 mg KOH/g and a number average molecular weight of 600 to 5,000 obtained by a half-esterification reaction of an acid anhydride with a polycarbonate polyol having three or more hydroxyl groups per molecule.

Abstract: This invention provides a water-based primer composition comprising (A) an aqueous dispersion of modified polyolefin, which is prepared by dispersing a modified polyolefin (a) in an aqueous medium, the polyolefin (a) being produced by modifying an unsaturated carboxylic acid- or acid anhydride-modified polyolefin (i) having a melting point not higher than 120° C. and an weight-average molecular weight within a range of 30,000-200,000, further with a compound having polyoxyalkylene chain; (B) at least one kind of aqueous resin selected from aqueous urethane resin, aqueous acrylic resin and aqueous polyester resin; and (C) pigment; the solid weight ratio of the component (A)/component (B) being within a range of 20/80-85/15, and containing the component (C) in an amount within a range of 0.5-200 parts by weight per 100 parts by weight of the total solid resin content of the composition.

Abstract: This invention provides a water-based primer composition comprising (A) an aqueous dispersion of modified polyolefin, which is prepared by dispersing a modified polyolefin (a) in an aqueous medium, the polyolefin (a) being produced by modifying an unsaturated carboxylic acid- or acid anhydride-modified polyolefin (i) having a melting point not higher than 120° C. and an weight-average molecular weight within a range of 30,000-200,000, further with a compound having polyoxyalkylene chain; (B) at least one kind of aqueous resin selected from aqueous urethane resin, aqueous acrylic resin and aqueous polyester resin; and (C) pigment; the solid weight ratio of the component (A)/component (B) being within a range of 20/80-85/15, and containing the component (C) in an amount within a range of 0.5-200 parts by weight per 100 parts by weight of the total solid resin content of the composition.

Abstract: This invention provides a water-based primer composition characterized by comprising an aqueous dispersion formed by dispersing unsaturated carboxylic acid- or acid anhydride-modified polyolefin (a) having a melting point of 50-120° C. and a weight-average molecular weight within a range of 30,000-200,000, and unsaturated carboxylic acid- or acid anhydride-modified polyolefin (b) having a melting point of 30-100° C. and a weight-average molecular weight within a range of 30,000-200,000, in an aqueous medium, the melting point of the modified polyolefin (a) being higher than that of the modified polyolefin (b) by at least 10° C.

Abstract: This invention provides an aqueous primer composition which comprises (A) an aqueous dispersion of modified polyolefin which comprises an unsaturated carboxylic acid- or acid anhydride-modified polyolefin (a) having a melting point of 120° C. or lower and a weight average molecular weight of 30,000 to 180,000, dispersed in an aqueous medium, (B) an ionic functional group-containing acrylic resin, and (C) a conductive carbon-containing pigment, and which forms a coating film with an L value of 35 or more and a surface resistivity of 1×108?/? or less.

Abstract: This invention discloses paint compositions characterized by comprising polyolefin or modified polyolefin (A) and ionic liquid (B), and coating methods using the compositions.

Abstract: This invention provides a multilayer coating film-forming method which comprises applying a first clear paint onto a coating object, applying onto so formed first clear coating film which is either uncured or cured by heating, a second clear paint such that its heat-cured film thickness falls within a range of 2-15 ?m, and forming the second clear coating film, (a) the first clear paint and second clear paint comprising hydroxyl-containing resin as the base resin and polyisocyanate compound as the crosslinking agent, and (b) when the coating film formed by applying a paint to a cured film thickness of 40 ?m and curing it by heating at 140° C. for 30 minutes is measured of its dynamic viscoelasticity at a frequency of 11 Hz, the first clear paint forming the first clear coating film having a glass transition temperature of lower than 70° C. and tan ? (=loss elastic modulus/storage elastic modulus) at 80° C. of less than 0.

Abstract: The present invention discloses an aqueous primer composition comprising: (A) an aqueous dispersion of a non-chlorine-based modified polyolefin comprising the dispersion of an unsaturated carboxylic acid- or acid anhydride-modified polyolefin (a), having a melting point of 120° C. or lower and a weight average molecular weight within the range of 50,000 to 150,000, in an aqueous medium; (B) a water-soluble or water-dispersible polyol resin; and (C) a pigment, wherein the solid content weight ratio of component (A) to component (B) is within the range of 20/80 to 85/15, and component (C) is contained within the range of 0.5 to 200 parts by weight based on 100 parts by weight of the total resin solid content in the composition; and a method for coating a plastic molded product using the aqueous primer composition.

Abstract: This invention discloses paint compositions characterized by comprising polyolefin or modified polyolefin (A) and ionic liquid (B), and coating methods using the compositions.

Abstract: A drive unit and a toy using the same wherein a mechanical drive transmitting mechanism is not used and moving parts are made to pivot by means of magnetic interaction forces acting between coils and magnets and the response of the moving parts is quick and movements of the moving parts can be controlled accurately and subtly, and wherein fatiguing of the coil wires is prevented by the coil parts being fixed and the permanent magnets being made to move. By the drive unit being simplified and reduced in size, a drive unit and a toy using the same which can operate stably over a long period are provided while mass production benefits and cost reductions together with simplification of the manufacturing process are promoted.In the drive unit, a swinging body 21 is mounted on a swing shaft 20 and a pair of permanent magnets 26, 27 are mounted on the swinging body 21 side by side in the direction in which the swinging body 21 pivots.

Abstract: A pollution-preventing process which comprises (i) controlling a surface moisture content of a first building material selected from the group consisting of an inorganic base material and wood at 0 to 20%, or (ii) coating a penetration-inhibiting primer onto a surface of a second building material having a surface moisture content of 10 to 100% and selected from the group consisting of an inorganic base material and wood to be dried, followed by coating a treating agent consisting of an organic solvent solution of a modified polysiloxane resin having a ladder structure onto a surface of the first building material or the second building material to impregnate the surface with the treating agent and by subjecting to curing treatment to prevent at least one pollutant selected from the group consisting of mold and moss from growing on the surface of the first building material or the second building material.

Abstract: An electromagnetic wave reflection-preventing material having a structure formed by successively laminating (A) an electromagnetic wave reflecting material layer, if needed, (B) a supporting layer, (C) a resin layer, if needed, (D) a supporting layer, and (E) a metallic pattern layer prepared by arranging at least one of a pattern unit comprising a geometrical pattern formed by use of a continuous metallic band, or comprising a multi-figured structure formed by combining a plurality of band-shaped metallic figures so as not to contact with each other; and an electromagnetic wave reflection-preventing method by use of the electromagnetic wave reflection-preventing material.

Abstract: An electromagnetic wave reflection-preventing material having a structure formed by successively laminating (A) an electromagnetic have reflecting metallic material layer, if needed, (B) a substrate layer, (C) a resin layer containing a powder of at least one selected from ferrite, carbon, metal powder and an electrically conductive metallic oxide, and, if needed, a good dielectric material, if needed, (D) a supporting film layer, and (E) a pattern coating layer prepared in the form of a geometrical pattern, containing a metal powder and having a volume resistivity of 10.sup.-3 to 10.sup.10 .OMEGA..multidot.

Abstract: An electromagnetic wave reflection-preventing material having a structure formed by a process which comprises successively laminating (A) a pattern layer formed in the form of a geometrical pattern having a volume resistivity of 10.sup.3 .OMEGA. .

Abstract: An electromagnetic wave absorber comprising at least one of a unit film as a multilayered film comprising a resin layer (A) optionally containing a pigment and a layer (B) applied onto the resin layer (A), selected from a group consisting of a metal layer, an alloy layer and a partly oxidized layer of the metal layer or the alloy layer, and having a film thickness of 1 nm to 50 nm.