Abstract: Provided is a calcium carbonate filler for resins that has uniform particles, high dispersibility and thermal stability, and, in particular, excellent smoothness, peelability, resistance to detachment, and the like and is useful as an antiblocking material. The calcium carbonate filler for resins includes calcium carbonate particles and satisfies formulae (a) to (e) below: (a) 1.0?Sw?12.0 (m2/g); (b) 0.1?Dx?5.0 (?m); (c) 0.1?Dy?5.0 (?m); (d) 0.8?Dy/Dx?3.5; and (e) 0.1?Tw?0.8 (% by weight), where Sw is a BET specific surface area (m2/g); Dx is a primary particle diameter (?m) expressed as a calculation formula: Dx=6/(2.7·Sw); Dy is a 50% diameter (?m); and Tw is a thermal weight loss (% by weight) between 100 and 300° C.

Abstract: Provided is a calcium carbonate filler for resins that has uniform particles, high dispersibility and thermal stability, and, in particular, excellent smoothness, peelability, resistance to detachment, and the like and is useful as an antiblocking material. The calcium carbonate filler for resins includes calcium carbonate particles and satisfies formulae (a) to (e) below: (a) 1.0?Sw?12.0 (m2/g); (b) 0.1?Dx?5.0 (?m); (c) 0.1?Dy?5.0 (?m); (d) 0.8?Dy/Dx?3.5; and (e) 0.1?Tw?0.8 (% by weight), where Sw is a BET specific surface area (m2/g); Dx is a primary particle diameter (?m) expressed as a calculation formula: Dx=6/(2.7·Sw); Dy is a 50% diameter (?m); and Tw is a thermal weight loss (% by weight) between 100 and 300° C.

Abstract: Provided is a calcium carbonate filler which gives films and the like excellent in moldability, dispersibility, gasmark (bubbles), hue, and further, excellent in optical properties such as reflectivity and light resistance when incorporated into a resin to prepare a resin composition.

Abstract: The calcium carbonate filler for a resin is provided in which a volatile component such as water present in a surface of calcium carbonate is likely to be degassed even when the filler is incorporated into and kneaded with a resin having high processing temperature at a high concentration, and foaming or the like can be suppressed. In particular, the calcium carbonate filler is useful in optical fields that require reflectivity and light resistance. The calcium carbonate filler for a resin has a content rate of particles having a particle diameter of 0.26 ?m or less is 30% or less in a number particle size distribution diameter measured from an electron micrograph, and satisfies the following expressions (a) Dms5/Dmv5?3.0, (b) 1.0?Sw?10.0 (m2/g) and (c) Dma?5.

Abstract: Provided is a calcium carbonate filler which gives films and the like excellent in moldability, dispersibility, gasmark (bubbles), hue, and further, excellent in optical properties such as reflectivity and light resistance when incorporated into a resin to prepare a resin composition. A calcium carbonate filler for a resin, satisfying the following expressions (a), (b), and (c): 1.0?Sw?10.0 (m2/g),??(a) 0.01?Tw?0.5(% by weight), and??(b) 80?Lw?90??(c) wherein Sw represents a BET specific surface area (m2/g) measured by using a BET specific surface area measuring device (Macsorb manufactured by Mountech Co., Ltd.); Tw represents a weight reduction value (% by weight) measured at 200° C. to 300° C. by using a differential thermogravimetric device (Thermo Plus EVO II manufactured by Rigaku Corporation); and Lw represents a degree of whiteness (L value) measured by using a spectroscopic color-difference meter (ZE-2000 manufactured by Nippon Denshoku Industries Co., Ltd.).

Abstract: The calcium carbonate filler for a resin is provided in which a volatile component such as water present in a surface of calcium carbonate is likely to be degassed even when the filler is incorporated into and kneaded with a resin having high processing temperature at a high concentration, and foaming or the like can be suppressed. In particular, the calcium carbonate filler is useful in optical fields that require reflectivity and light resistance. The calcium carbonate filler for a resin has a content rate of particles having a particle diameter of 0.26 ?m or less is 30% or less in a number particle size distribution diameter measured from an electron micrograph, and satisfies the following expressions (a) Dms5/Dmv5?3.0, (b) 1.0?Sw?10.0 (m2/g) and (c) Dma?5.

Abstract: Provided is a surface treated calcium carbonate filler for resins, which comprises calcium carbonate particles, the surface of which has been treated with at least one surface active agent (A) selected from the group consisting of saturated fatty acids, unsaturated fatty acids, alicyclic carboxylic acids, resin acids, and salts thereof and with at least one compound (B) having the ability to chelate alkaline earth metals, the compound (B) being selected from the group consisting of phosphonic acids, polycarboxylic acids, and salts thereof. The surface treated calcium carbonate filler for resins of the present invention deteriorates little with time, has satisfactory dispersibility in resins, and can give a sheet or film which has a satisfactory balance among durability, weatherability, strength, and thermal stability, and is useful as a battery separator or a light reflector.

Abstract: A calcium carbonate filler for a resin, in which the content rate of particles having a particle diameter of 0.26 ?m or less is 30% or less in a number particle size distribution diameter measured (Mac-VIEW manufactured by Mountech) from an electron micrograph, and which satisfies the following expressions (a) to (c) is provided. Dms5/Dmv5?3??(a) 1?Sw?8 (m2/g)??(b) Mo?300 (ppm)??(c) wherein Dms5: A 5% diameter (?m) accumulated from a small particle side in a volume particle size distribution by a laser diffraction particle size distribution measuring device (MASTERSIZER2000 manufactured by Malvern); Dmv5: A 5% diameter (?m) accumulated from a small particle side in a number particle size distribution in a particle diameter (Mac-VIEW manufactured by Mountech) measured with an electron microscope; Sw: A BET specific surface area (Macsorb manufactured by Mountech) (m2/g); Mo: A water amount (ppm) by the Karl Fischer method at 200 to 300° C.

Abstract: A calcium carbonate filler for a resin, in which the content rate of particles having a particle diameter of 0.26 ?m or less is 30% or less in a number particle size distribution diameter measured (Mac-VIEW manufactured by Mountech) from an electron micrograph, and which satisfies the following expressions (a) to (c) is provided. Dms5/Dmv5?3??(a) 1?Sw?8 (m2/g)??(b) Mo?300 (ppm)??(c) wherein Dms5: A 5% diameter (?m) accumulated from a small particle side in a volume particle size distribution by a laser diffraction particle size distribution measuring device (MASTERSIZER2000 manufactured by Malvern); Dmv5: A 5% diameter (?m) accumulated from a small particle side in a number particle size distribution in a particle diameter (Mac-VIEW manufactured by Mountech) measured with an electron microscope; Sw: A BET specific surface area (Macsorb manufactured by Mountech) (m2/g); Mo: A water amount (ppm) by the Karl Fischer method at 200 to 300° C.

Abstract: Provided is a surface treated calcium carbonate filler for resins, which comprises calcium carbonate particles, the surface of which has been treated with at least one surface active agent (A) selected from the group consisting of saturated fatty acids, unsaturated fatty acids, alicyclic carboxylic acids, resin acids, and salts thereof and with at least one compound (B) having the ability to chelate alkaline earth metals, the compound (B) being selected from the group consisting of phosphonic acids, polycarboxylic acids, and salts thereof. The surface treated calcium carbonate filler for resins of the present invention deteriorates little with time, has satisfactory dispersibility in resins, and can give a sheet or film which has a satisfactory balance among durability, weatherability, strength, and thermal stability, and is useful as a battery separator or a light reflector.

Abstract: A fine pore formation agent for a porous resin film is provided which comprises inorganic particles satisfying (a) 0.1?D50?1.5 (?m) (D50: average particle diameter of particles in 50% cumulative total by weight from the larger particle side by micro-track FRA), (b) Da?20 (?m) (Da: maximum particle diameter by micro-track FRA), (c) 3?Sw?60 (m2/g) (Sw: BET specific surface area measured by nitrogen adsorption method), (d) Ir?1.0×105 (?·cm) (Ir: volume resistivity (?·cm). The fine pore formation agent for a porous resin film is capable of providing a resin composition giving a porous resin film useful in uses for electric parts such as capacitors and battery separators.

Abstract: A fine pore formation agent for a porous resin film is provided which comprises inorganic particles satisfying (a) 0.1?D50?1.5 (?m) (D50: average particle diameter of particles in 50% cumulative total by weight from the larger particle side by micro-track FRA), (b) Da?20 (?m) (Da: maximum particle diameter by micro-track FRA), (c) 3?Sw?60 (m2/g) (Sw: BET specific surface area measured by nitrogen adsorption method), (d) Ir?1.0×105 (?·cm) (Ir: volume resistivity (?·cm). The fine pore formation agent for a porous resin film is capable of providing a resin composition giving a porous resin film useful in uses for electric parts such as capacitors and battery separators.

Abstract: The surface-treated calcium carbonate is disclosed which is surface-treated with an organic surface treating agent, said surface-treated calcium carbonate satisfies the particular BET specific surface area (Sw), reduced heat amount per unit specific surface area (As), average pore diameter (Dxp) at which an increased amount of mercury penetration reaches the maximum value in a method of mercury penetration, and amount of an average pore diameter [maximum value of an increased amount of mercury penetration (Dyp)/average pore diameter (Dxp)]. The surface-treated calcium carbonate of the present invention is particularly useful for resins and it not only improves adhesion of resin compositions to a subject to be adhered, but forms a rigid coating film when blended into resins.

Abstract: A calcium phosphate base particulate compound is provided which satisfies (a) 20?Sw?300 (BET specific surface area (m2/g); (b) 1?Tg?150 (heat loss (mg/g) per 1 g of calcium phosphate from 250 to 500° C.); (c) 0.005?Dx50?0.5 (cumulative 50% average diameter (?m) counted from larger particle side based on the observation by TEM); and (d) 1.5?Dx50/?x?20 (?x: standard deviation {In(Dx16/Dx50)}) The calcium phosphate base particulate compound of the present invention is excellent not only in particulate evenness and dispersibility but in thermal stability, and gives a resin composition excellent in anti-blocking property, a resin composition excellent in printing suitability, and a food composition such as good taste calcium-enriched milk with less precipitation.

Abstract: The surface-treated calcium carbonate is disclosed which is surface-treated with an organic surface treating agent, said surface-treated calcium carbonate satisfies the particular BET specific surface area (Sw), reduced heat amount per unit specific surface area (As), average pore diameter (Dxp) at which an increased amount of mercury penetration reaches the maximum value in a method of mercury penetration, and amount of an average pore diameter [maximum value of an increased amount of mercury penetration (Dyp)/average pore diameter (Dxp)]. The surface-treated calcium carbonate of the present invention is particularly useful for resins and it not only improves adhesion of resin compositions to a subject to be adhered, but forms a rigid coating film when blended into resins.

Abstract: An additive for synthetic resins is provided which comprises composite particles obtained by depositing a calcium phosphate compound (R) on support particles (M) of a petaloid porous structure. The additive of the present invention provides synthetic resin compositions having excellent transparency, anti-scratch property, anti-blocking property and less discoloration caused by deterioration of resin.

Abstract: Disclosed is an inorganic dispersant having a high specific surface area and a high surface activity which comprises a calcium phosphate type compound having a specific particle composition, particle shape, particle size and dispersibility, and specific surface area. When used as a suspension polymerization stabilizer, it provides polymer particles having a uniform and sharp particle size distribution, and when the polymer particles are contained in an unsaturated polyester resin composition and a toner composition, the obtained compositions have excellent quality.