Abstract:
This invention relates to a process for producing a polymeric product by the polymerisation of at least one olefinic compound in the form of an olefin or a compound including an olefinic moiety by contacting the at least one olefinic compound with a polymerisation catalyst. The catalyst comprises the combination of a source of a Group IV to VI transition metal; and a ligating compound of the formula (R1)mX1(Y)X2(R2)n. The process is characterised therein that when R1 and R2 are independently a hydrocarbyl group or a heterohydrocarbyl group which contains at least one non-polar substituent, the olefinic compound is contacted with the polymerisation catalyst at a reaction temperature from and above 70° C.; and where R1 and R2 are independently a hydrocarbyl group or a heterohydrocarbyl group which contains no substituent, the olefinic compound is contacted with the polymerisation catalyst at a reaction temperature from and above 90° C.
Abstract:
Disclosed are catalyst compositions having an external electron donor which includes one or more of the following compositions: a phosphite, a phosphonite, a pyrophosphite, and/or a diphosphazane. Ziegler-Natta catalyst compositions containing the present external electron donor exhibit strong activity and produce propylene-based olefins with high isotacticity and high melt flow rate.
Abstract:
Olefin polymerization catalysts for producing polyolefin resins which can dispense with a melt-kneading step necessitating great energy or a substitute addition step therefor and to which small amounts of antioxidants have been effectively added; and a process for the production of the catalysts. Specifically, a catalyst for olefin polymerization characterized by being prepared by conducting prepolymerization in the presence of [I] a solid catalyst for olefin polymerization having a mean particle diameter of 10 to 200 μm, [II] an antioxidant for resins, and [III] an olefin; and a catalyst for olefin polymerization characterized by containing [IV] an organoaluminum compound in addition to the components [I] to [III].
Abstract:
USE OF A BICYCLIC (2.2.2)OCTANE ADJUVANT OF THE FORMULA
4-R-2,6,7-TRI(OXA)-1-PHOSPHABICYCLO(2.2.2)OCTANE
WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF H, A HALOGEN AND A HYDROCARBON RADICAL HAVING FROM 1 TO 20 CARBON ATOMS FOR A BINARY POLYMERIZATION CATALYST SYSTEM CONTAINING A COMPLEX OF THE FORMULA TICL3.1/3ALCL3 AND AT LEAST ONE COMPOUND OF THE FORMULA R''NALX3-N WHEREIN R'' IS ALKYL, ARYL, CYCLOALKYL OR COMBINATIONS THEREOF HAVING UP TO 20 CARBON ATOMS, X IS A HALOGEN, AND N IS 2 OR 3, RESULTS IN THE INCREASE PRODUCTION OF POLYMERS OF 1-OLEFINS HAVING AN ACCEPTABLE FLEXURAL MODULUS AND LOWER XYLENES-SOLUBLES CONTENT.
Abstract:
UTILIZATION OF A CATALYST SYSTEM FORMED BY ADMIXING (A) A COMPOUND OF THE FORMULA RNAIX3-0; (B) A TITANIUM TRICHLORIDE-ALUMINUM TRICHLORIDE COMPLEX OF THE APPROXIMATE FORMULA TICL3-1/3ALCL3; AND (C) A PHOSPHITE HAVING THE FORMULA (R''O)3P OR A PHOSPHONITE HAVING THE FORMULA (RO)2PR IN THE POLYMERIZATION OF 1-OLEFINS RESULTS IN THE PRODUCTION OF POLYMERS HAVING HIGHER MODULUS AND LOWER XYLENES-SOLUBLE CONTENT. IN THE ABOVE FORMULAS, R IS SELECTED FROM ALKYL, CYCLOALKY, AND ARYL GROUPS, AND COMBINATIONS THEREOF, HAVING FROM 1 TO 12 CARBON ATOMSS R'' IS SELECTED FROM MONO- OR DIHALO-SUBSTITUTED ALKYL, CYCLOALKYL, AND ARYL GROUPS AND COMBINATIONS THEREOF HAVING FROM 1 TO 12 CARBONS ATOMS, AND N IS 1 OR 2.