Abstract: A magnesium compound obtainable by reacting metal magnesium, ethanol, an alcohol having from 3 to 10 carbon atoms and a halogen and/or a halogen-containing compound containing at least 0.0001 gram atom of a halogen atom relative to one gram atom of the metal magnesium at 0 to 70° C., which comprises composition represented by the formula (I), and which has a particle diameter D50 corresponding to 50% of cumulative weight fraction of from 4 to 20 ?m and a particle size distribution index (P) of P<4.0: Mg(OC2H5)2?n(OR1)n??(I) where n is a numerical value satisfying 0<n<0.35, R1 is CmH2m+1, and m is an integer of from 3 to 10.

Abstract: A magnesium compound represented by the formula (I): Mg(OC2H5)2?n(OR1)n??(I) where R1 is CmH2m+1 (where m is an integer of from 3 to 10), and n is a numerical value satisfying 0<n<0.35; a solid catalyst component for olefin polymer using the magnesium compound; a catalyst for olefin polymer; and methods of producing olefin copolymers such as a propylene-based random copolymer and propylene-based block copolymer by using the catalyst for olefin polymer.

Abstract: A method of producing a magnesium compound by reacting the following components (i), (ii) and (iii): (i) metal magnesium (ii) an alcohol (iii) a metal dihalide compound represented by the general formula (I) containing at least 0.001 mole of M relative to one mole of magnesium of the metal magnesium (i) MX2??(I) where X is a halogen atom and M is Mn, Fe, Co or Zn.

Abstract: A magnesium compound obtainable by reacting metal magnesium, ethanol, an alcohol having from 3 to 10 carbon atoms and a halogen and/or a halogen-containing compound containing at least 0.0001 gram atom of a halogen atom relative to one gram atom of the metal magnesium at 0 to 70° C., which comprises composition represented by the formula (I), and which has a particle diameter D50 corresponding to 50% of cumulative weight fraction of from 4 to 20 ?m and a particle size distribution index (P) of P<4.0: Mg(OC2H5)2?n(OR1)n??(I) where n is a numerical value satisfying 0<n<0.35, R1 is CmH2m+1, and m is an integer of from 3 to 10.

Abstract: A method of producing a magnesium compound by reacting the following components (i), (ii) and (iii): (i) metal magnesium (ii) an alcohol (iii) a metal dihalide compound represented by the general formula (I) containing at least 0.001 mole of M relative to one mole of magnesium of the metal magnesium (i) MX2??(I) where X is a halogen atom and M is Mn, Fe, Co or Zn.

Abstract: A magnesium compound represented by the formula (I): Mg(OC2H5)2?n(OR1)n ??(I) where R1 is CmH2m+1 (where m is an integer of from 3 to 10), and n is a numerical value satisfying 0<n<0.35; a solid catalyst component for olefin polymer using the magnesium compound; a catalyst for olefin polymer; and methods of producing olefin copolymers such as a propylene-based random copolymer and propylene-based block copolymer by using the catalyst for olefin polymer.

Abstract: A magnesium compound obtained by reacting the following components (i) (ii) and (iii): (i) metal magnesium (ii) an alcohol (iii) a metal dihalide compound represented by the general formula (I) containing at least 0.001 mole of M relative to one mole of magnesium of the metal magnesium (i) MX2??(I) where X is a halogen atom and M is Mn, Fe, Co or Zn.

Abstract: A resin composition containing thermoplastic resin and a flame retardant is sufficiently kneaded and molded, and carbon dioxide in a supercritical state is caused to permeate into the resin composition. Subsequently, the resin composition is degassed by cooling and/or pressure reduction. As a result of degassing, a resin foam body having a fine and uniform micro-cellular foam structure is obtained. The resin foam body has a cyclic structure in which a resin phase and a pore phase are continuous and intertwined. The obtained resin foam body can suitably find applications such as home OA parts, electric and electronic parts and automobile parts that are required to be highly strong, lightweight and nonflammable.

Abstract: A resin composition containing thermoplastic resin and a flame retardant is sufficiently kneaded and molded and carbon dioxide in a supercritical state is caused to permeate into it. Subsequently, the resin composition is degassed by cooling and/or pressure reduction. As a result of degassing, a resin foam body 1 having a fine and uniform micro-cellular foam structure is obtained. The resin foam body 1 has a cyclic structure in which a resin phase 2 and a pore phase 3 are continuous and intertwined. The obtained resin foam body 1 can suitably find applications such as home OA parts, electric and electronic parts and automobile parts that are required to be highly strong, lightweight and nonflammable.

Abstract: The present invention provides a composite resin composition comprises A) polypropylene-based resin by 100 weight portions, (B) organized denatured clay by 0.1 to 50 weight portions, and (C) maleic anhydride denatured polypropylene by 0.5 to 30 weight portions, in which the maleic anhydride denatured polypropylene satisfies the following conditions that the quantity of not-reacted maleic anhydride is outside a limit for quantitative analysis; that the percentage of acid content against a number of polymer chains is not less than 0.8 and not more than 2.0; that the molecular weight distribution is not less than 2.5; that the percentage of components with the molecular weight of 10,000 or less is not more than 0.5% by weight; and that the ultimate viscosity (&eegr;) is 1 or more. A supercritical gas is infiltrated in this composite resin composition for degassing to obtain resin foam. With the operations above, bubbles are formed finely and homogeneously at the high density and high solidity is provided.

Abstract: Carbon dioxide in a supercritical state is caused to permeate into a resin composition formed by sufficiently kneading a thermoplastic copolymer having a polysiloxane structure at recurring units. Subsequently, the resin composition is degassed by cooling and/or pressure reduction. As a result of degassing, a resin foam body 1 having a fine and uniform micro-cellular foam structure is obtained. The resin foam body 1 has a cyclic structure in which a resin phase 2 and a pore phase 3 are continuous and intertwined. The resin foam body 1 shows an excellent reflectivity relative to rays of light and is highly nonflammable, while it is very strong and lightweight.