摘要:
The porous composite oxide particle is coated with a porous silica-based inorganic oxide layer, and also a substrate has a coating film with the fine particles thereon, which has a low refractive index and excellent in adhesion with a resin or the like, strength, the ability to reduce reflection and the like. The fine particles include porous composite oxide with silica and an inorganic oxide other than silica, wherein the fine particles are coated with a porous silica-based inorganic oxide layer having a thickness from 0.5 to 20 nm. The fine particles include preferably an organic group directly bonded to silicon, and SR/ST, the ratio of the molar amount of silicon having the organic group directly bonded thereto (SR) vs the molar amount of the total silicon (ST), is preferably in the range from 0.001 to 0.9.
摘要:
The invention provides a recording sheet having an ink-receiving layer, which comprises a substrate sheet and an ink-receiving layer formed thereon, said ink-receiving layer comprising oxide particles, wherein the ink-receiving layer has pores having a diameter in the range of 3.4 to 2,000 nm, the pore volume of pores having a diameter of 3.4 to 30 nm is in the range of 0.2 to 1.8 ml/g, and the pore volume of pores having a diameter of 30 to 2,000 nm is in the range of 0.1 to 1.5 ml/g. It is preferable that the oxide particles have an average particle diameter of 2 to 1,000 nm and are a mixture of hydrophobic oxide particles and hydrophilic oxide particles. This recording sheet shows sufficient strength, has excellent printability such that images of uniform density and high sharpness can be printed thereon without bleeding, and is excellent in water resistance, weathering resistance and fading resistance.
摘要:
The invention provides a recording sheet having an ink-receiving layer, which comprises a substrate sheet and an ink-receiving layer formed thereon, said ink-receiving layer comprising oxide particles, wherein the ink-receiving layer has pores having a diameter in the range of 3.4 to 2,000 nm, the pore volume of pores having a diameter of 3.4 to 30 nm is in the range of 0.2 to 1.8 ml/g, and the pore volume of pores having a diameter of 30 to 2,000 nm is in the range of 0.1 to 1.5 ml/g. It is preferable that the oxide particles have an average particle diameter of 2 to 1,000 nm and are a mixture of hydrophobic oxide particles and hydrophilic oxide particles. This recording sheet shows sufficient strength, has excellent printability such that images of uniform density and high sharpness can be printed thereon without bleeding, and is excellent in water resistance, weathering resistance and fading resistance.
摘要:
It is an object of the present invention to provide a material which is applied to substrates by an easy and simple process, is applicable to substrates of a wide range and is capable of forming an antifouling film exhibiting excellent antifouling performance, and a substrate with an ink-receiving layer having excellent decoloring property. The titanium-containing silica sol of the invention includes (a) the following fine particles (a1) or the following fine particles (a2) and (b) a dispersion medium: (a1) titania fine particles having a mean particle diameter of 2 to 50 nm and porous silica fine particles having a mean particle diameter of 5 to 100 nm and a specific surface area, as determined by BET method, of not less than 300 m2/g, or (a2) porous silica fine particles obtained by surface-modifying surfaces of porous silica fine particles having a mean particle diameter of 5 to 100 nm and a specific surface area, as determined by BET method, of not less than 300 m2/g with a titanate compound.
摘要:
Inorganic compound particles constituted of a shell, a porous matter or a cavity enclosed therein, and the porous matter or the cavity being kept unchanged in a subsequently formed transparent coating film.
摘要:
A thermoplastic resin film excellent in slipperiness, wear resistance and transparency contains 0.05 to 0.5 wt. % of specified fine particles of composite oxide comprising silica, alkali metal oxide, and at least one inorganic oxide other than silica, wherein the fine particles satisfies the following expression (I):S .gtoreq.10,000/(Dp*SG) (I)wherein S indicates the specific surface area (m.sup.2 /g) of the fine particles of composite oxide, Dp indicates the average diameter (nm) of the fine particles, and SG indicates the true specific gravity thereof. The film is preferably a polyester film having a hazing value of 5% or less. It is suitable for use as magnetic tape, capacitor, photographic film and pressure-sensitive adhesive tape. The film is manufactured by adding a silicate of alkali metals, ammonium or organic bases and an alkali-soluble inorganic compound simultaneously to an alkali solution with pH 9 or above, generating fine particles of composite oxide without any control of the pH of this reaction solution, adding the obtained sol to a thermoplastic resin and/or the reaction system thereof, and processing of a film.
摘要:
An organo-antimony oxide sol capable of affording an electrical conductivity property and a photo-setting coating composition containing such a sol are provided. The particulate colloidal antimony oxide, i.e. a dispersoid in the sol, has a pyrochlore structure and is surface-treated with an organo-silicon compound of the formula ##STR1## wherein R.sup.2 is hydrogen or a C.sub.1 -C.sub.5 alkyl group; R.sup.3 is hydrogen or a C.sub.1 -C.sub.5 alkyl group; R.sup.4 is a C.sub.1 -C.sub.8 alkylene group; R.sup.5 is hydrogen or a C.sub.1 -C.sub.8 alkyl group; i is an integer of 1-3; j is an integer of 0-2; and k is an integer of 1-3 equal to i+j.
摘要:
In a process for preparing spherical particles of a metal oxide or hydroxide having a particle size of from 0.1 to 10 .mu.m by adding a corresponding metal alkoxide to a dispersion of water-alcohol system having dispersed therein a metal oxide or hydroxide as a seed, under alkaline conditions and allowing a decomposition product from said metal alkoxide to attach onto said seed to effect particle growth of the seed, the improvement which comprises maintaining said dispersion at a substantially constant pH within the range between 10 and 13 during the addition of the metal alkoxide to said dispersion and the subsequent particle growth of the seed, thereby to prepare mono-dispersed particles substantially free from particle aggregation having a sharp particle size distribution of a standard deviation of not greater than 0.5. The white particles so prepared may be, after separation, heat treated to provide black particles. The white or black particles may be coated with a synthetic resin in the surface. The products are useful particularly as spacers for liquid crystal display devices.
摘要:
The present invention provides a dispersion liquid of silica particles for polishing with a low content of Na ions and also with a content of ions other than Na ions in a prespecified range. This dispersion liquid is a dispersion liquid of silica particles in which the silica particles having the average particle diameter in the range from 5 to 300 nm is dispersed, and a content of Na ions in the silica particle is less than 100 ppm, while a contents of ions other than Na ions is in the range from 300 ppm to 2 weight %.
摘要:
Amorphous inorganic particles as a dental material includes silica and inorganic oxide(s) other than silica and has high x-ray impermeability. The inorganic particles as a dental material includes silica with the content in the range from 70 to 98 weight % and oxide(s) of one or more elements selected from the group of Zr, Ti, La, Ba, Sr, Hf, Y, Zn, AL, and B, wherein 5 to 70 weight % of the silica is originated from an acidic silicic acid solution and 30 to 95 weight % of the silica is originated from a sol of silica. The inorganic particles as a dental material have an average particle diameter in the range from 1 to 10 μm, specific surface area in the range from 50 to 350 m2/g, pore volume in the range from 0.05 to 0.5 ml/g, amorphous crystallinity as observed by x-ray diffraction, and the refractive index in the range from 1.47 to 1.60.
摘要翻译:作为牙科材料的无定形无机颗粒包括除二氧化硅之外的二氧化硅和无机氧化物,并且具有高x射线不渗透性。 作为牙科用材料的无机粒子包含含量为70〜98重量%的二氧化硅和选自Zr,Ti,La,Ba,Sr,Hf,Y, Zn,AL和B,其中5至70重量%的二氧化硅来自酸性硅酸溶液,30至95重量%的二氧化硅源自二氧化硅溶胶。 作为牙科用材料的无机粒子的平均粒径为1〜10μm,比表面积为50〜350m 2 / g,孔体积为0.05〜0.5ml / g ,通过x射线衍射观察到的无定形结晶度,折射率在1.47至1.60的范围内。