Abstract: There are provided calcium hydroxide having a large specific surface area, a resin composition comprising the calcium hydroxide and having excellent thermal stability, and a molded article and a stabilizer for synthetic resins which comprise the calcium hydroxide. There are provided a calcium hydroxide compound represented by the following formula (1): Ca(OH)2-nx(An?)x??(1) (wherein n represents an integer of 1 to 4, x represents a number of 0.001 to 0.2, and An? represents an anion derived from at least one compound selected from the group consisting of a silicon-based compound, a phosphorus-based compound, an aluminum-based compound, an inorganic acid and an organic acid.), and a synthetic resin, a molded article and a stabilizer for synthetic resins which comprise the compound.

Abstract: There are provided calcium hydroxide having a large specific surface area, a resin composition comprising the calcium hydroxide and having excellent thermal stability, and a molded article and a stabilizer for synthetic resins which comprise the calcium hydroxide. There are provided a calcium hydroxide compound represented by the following formula (1): Ca(OH)2?nx(An?)x??(1) (wherein n represents an integer of 1 to 4, x represents a number of 0.001 to 0.2, and An? represents an anion derived from at least one compound selected from the group consisting of a silicon-based compound, a phosphorus-based compound, an aluminum-based compound, an inorganic acid and an organic acid.), and a synthetic resin, a molded article and a stabilizer for synthetic resins which comprise the compound.

Abstract: The coloring problem of a conventional molded article is overcome while retaining the advantages of high strength and high flame retardancy of the molded article when a metal hydroxide is used in combination with red phosphorus and carbon powder in the method of imparting a synthetic resin with flame retardancy. The molded article can be colored in any color and exhibits decreased lowering of electric insulation resistance when submerged. The molded article comprises a base material colored from dark red to black containing 100 wt parts synthetic resin, 5-200 wt parts metal hydroxide, 1-30 wt parts red phosphorus and 0.1-30 wt parts carbon powder; and a skin layer laminated thereon masking a colored surface of the base wherein the skin layer contains 100 wt parts, 0-100 wt parts pigment, and 0-200 wt parts metal hydroxide, provided that the total amount of pigment and metal hydroxide in the skin layer is at least 0.001 wt parts.

Abstract: The coloring problem of a conventional molded article is overcome while retaining the advantages of high strength and high flame retardancy of the molded article when a metal hydroxide is used in combination with red phosphorus and a carbon powder in the method of imparting a synthetic resin with flame retardancy.

Abstract: A flame-retardant for a synthetic resin, which is obtained by surface-treating a magnesium hydroxide with an emulsion of a copolymer or polymer of the formula (1), wherein X is hydrogen, a phenyl group, etc., Y is an alkyl group, etc., each of R1 and R2 is hydrogen, an alkyl group, etc., m is 0 or a positive integer, n is a positive integer, and “˜” shows the polymerization state of a main chain, the formula (2), wherein X, Y, etc. are as defined in the formula (1), or the formula (3), wherein X and “˜” are as defined in the formula (1), each of Y1 and Y2 is hydrogen, an alkyl group, etc., each of R1, R2 and R3 is hydrogen or an alkyl group, and each of a, b and c is a positive integer, a resin composition containing said flame-retardant and a molded article thereof.

Abstract: A polyketone resin composition, which has flame retardancy and is suitable for a variety of molded articles is provided. A flame-retardant resin composition obtained by incorporating 15 to 60% by weight of surface-coated magnesium hydroxide having a specific surface area measured by a BET method of 1 to 15 m2/g and an average secondary particle diameter of 0.2 to 5 &mgr;m into a polyketone resin; and molded article thereof.

Abstract: Disclosed are ultraviolet light protective agents having the general formula:(Zn.sub.y M.sup.2+.sub.z).sub.1-x M.sup.3+.sub.x O.sub.1+x/2wherein M.sup.2+ is at least one metal selected from the group consisting of Mg, Ca, Ni and Cu; and M.sup.3+ is at least one metal selected from the group consisting of Al and Fe; as well as a sterilizer and a deodorizer which contain the compound of the above formula (I) as an effective component. They are additives to plastics, rubber, cosmetic materials, and paint and also useful as sterilizer or deodorizer, composition components.

Abstract: A resin composition containing a hydrotalcite compound in an amount of 0.01 to 5 parts by weight based on 100 parts by weight of the thermoplastic resin, the hydrotalcite compound having fine crystals of copper oxide deposited on the surface thereof; and a molded article formed of the above resin composition. The resin composition and the molded article formed thereof have excellent heat resistance and weatherability.

Abstract: A crystalline propylene polymer composition having improved resin flowability and processability, having remarkable resistance to color development (pinking) and excellent anti-rust property and heat stability, and comprising 100 parts by weight of a crystalline propylene polymer, 0.01 to 1 part by weight of an aromatic peroxide and 0.001 to 1 part by weight of a hydrotalcite compound of the formula (1),(Mg.sub.y Zn.sub.z).sub.1-x Al.sub.x (OH).sub.2 (A).sup.n-.sub.x/2 .multidot.mH.sub.2 O (1)wherein (A).sup.n- is an anion having a valence of n, x, y and z are numbers satisfying y+z=1, 0.ltoreq.y.ltoreq.0.9, 0.1.ltoreq.z.ltoreq.1 and 0.2.ltoreq.x.ltoreq.0.8, and m is 0 or a positive number.