摘要:
Provided area catalyst for polymerizing olefinic monomers, which comprises (a) a transition metal compound, (b) at least one member selected from clay, clay minerals and ion-exchanging layered compounds, (c) a silane compound, and optionally (d) an alkylating agent; a catalyst for polymerizing olefinic monomers, which comprises (a) a transition metal compound, (b) at least one member selected from clay, clay minerals and ion-exchanging layered compounds, (c) a silane compound, and optionally (e) an organic aluminum compound, and further optionally (d) an alkylating agent; and a method for producing olefinic polymers or styrenic polymers, which comprises homopolymerizing or copolymerizing olefinic or styrenic monomers in the presence of the catalyst for polymerizing olefinic monomers. The method does not require a large amount of aluminoxane, and the catalyst to be used therein has high polymerization activity. Using the catalyst, olefinic polymers and styrenic polymers having high stereospecificity are obtained. The amount of the metallic component remaining in the polymers produced is small, and the polymers have high quality. As being highly efficient, the method is favorable to industrial use.
摘要:
Catalysts for olefin polymerization comprising (a) a compound of a transition metal of Groups 8 to 10 of the Periodic Table, (b) clay, a clay mineral or an ion-exchanging layered compound, (c) a silane compound, and optionally (d) an organic aluminium compound and/or (e) an alkylating agent, and those comprising (a) a compound of a transition metal of Groups 8 to 10 of the Periodic Table, (b) clay, a clay mineral or an ion-exchanging layered compound, (d) an organic aluminium compounds and optionally (e) an alkylating agent have high activity, though not containing a large amount of aluminoxane. Using the catalysts, high-quality olefin polymers with good morphology are produced efficiently. The amount of the residual metal to remain in the polymers produced is small.
摘要:
A process for producing a polyolefin is here disclosed which comprises the step of polymerizing olefins in the presence of a catalyst comprising (A) a compound of a transition metal in the group IV of the Periodic Table, (B) an aluminoxane, (C) a compound having 2 or more aromatic rings in its molecule represented by the formulaAr.sup.1 --(YR.sub.n-2).sub.k --Ar.sup.2wherein the symbols are as defined in the specification, and if necessary, (D) an organic aluminum compound. In this process, the novel catalyst having a high polymerization activity is used, whereby the desired polyolefin can be efficiently produced.
摘要:
An aromatic polycarbonate resin composition exhibiting small molding shrinkage anisotropy, high dimensional stability, and high flowability, and a molded article produced therefrom, wherein the aromatic polycarbonate resin composition, and the molding thereof, each comprise 100 parts by mass of an admixture comprising: (A) 40-99 mass % aromatic polycarbonate resin, or a mixture of 60 mass % or more aromatic polycarbonate resin and 40 mass % or less flowability improver and/or impact modifier; (B) 60-1 mass % silicate-containing inorganic filler, or a mixture of 35 mass % or more silicate-containing inorganic filler and 65 mass % or less fibrous filler; and (C) 0.05-3 parts by mass of mono- or di-ester of phosphoric acid having a polyoxyalkylene alkyl ether or polyoxyalkylene alkylaryl ether group represented by formula [R1—O—(CnH2nO)m]3-xP(═O)—(OH)x, wherein R1 represents an alkyl group having 1 to 18 carbon atoms or a substituted phenyl group having an alkyl group having 1 to 18 carbon atoms; n is 2 or 3; and x is 1 or 2.
摘要:
An aromatic polycarbonate resin composition exhibiting small molding shrinkage anisotropy, high dimensional stability, and high flowability, and a molded article produced therefrom, wherein the aromatic polycarbonate resin composition, and the molding thereof, each comprise 100 parts by mass of an admixture comprising: (A) 40-99 mass % aromatic polycarbonate resin, or a mixture of 60 mass % or more aromatic polycarbonate resin and 40 mass % or less flowability improver and/or impact modifier; (B) 60-1 mass % silicate-containing inorganic filler, or a mixture of 35 mass % or more silicate-containing inorganic filler and 65 mass % or less fibrous filler; and (C) 0.05-3 parts by mass of mono- or di-ester of phosphoric acid having a polyoxyalkylene alkyl ether or polyoxyalkylene alkylaryl ether group represented by formula [R1—O—(CnH2nO)m]3-xP(═O)—OHx], wherein R1 represents an alkyl group having 1 to 18 carbon atoms or a substituted phenyl group having an alkyl group having 1 to 18 carbon atoms; n is 2 or 3; and x is 1 or 2.