TH26694A - "Method for the Preparation of Ethyline Polymer Compositions" A method for preparing ethylene polymer compositions. - Google Patents

Abstract

A method was disclosed for the preparation of an ethylene composition with a density of 0.86-0.94 g / m3 and a limited viscosity (n) to 1-6 dl / g using a catalyst polymers. Ceolefins containing transition metal compounds with ligands with cyclo-alkadienyl structure. And ordano-aminumoxy compounds There is also a method for the preparation of an ethylene polymer composition with a density of 0.87-0.93 g / m3 and a limited viscosity (n) of 0.5-6 dl / g.

Claims (4)

1. Method for the preparation of ethene polymer composition with a density of 0.87-0.93 g / cm3 and a limited viscosity (n) of 0.5-6 dl / g, consisting of a process action. Several steps that consist of Step polymerization (C), where the polymerization of ethylene and a-olyfins is made by the use of polymerization catalysts. The olefin [II] consists of a transition metal (A) consisting of a ligand with a cycloalgadienyl structure. And organo-aluminum oxy (B) compounds to produce ethylene copolymer [III] with a density of less than 0.91 g / m3, and a finite viscosity [n] of 0.5. -6 dl / g and step polymerization (d) where ethylene polymerization or ethylene polymerization Or other a-olifins by using an olefin polymerization catalyst [III] composed of a titanium accelerator element [C] prepared from a titanium compound represented by the formula Ti. (OR) gX4-g (where R is hydrocarbon group, x is halogen, and 0 < = g < = 4) and is composed of titanium, magnesium and halogens. Organo aluminum (D) and / or organo aluminum oxy [E] compounds to form ethylene copolymer [IV] with a higher density than the ethylene oxide density. Lean copolymer [III] and viscosity limit [n] is 0.5-6 dl / g where the polymerization steps (c) and (d) are performed respectively. In such a way that the procedure (d) is performed with ethylene copolymer [III] obtained in a previously performed (c) procedure, or a procedure (c) performed with an ethylene polymer [IV] obtained in a (d) procedure. ) That was done before This gives the ethylene polymer [IV] amount 10-1000 parts by weight when calculated from 100 parts by weight of ethylene copolymer [III]. 2.A method for the preparation of the ethylene polymer composition according to claim 1, where the transition metal of the transition metal compound (A) is zirconium, titanium, hafnium, chromium or vana. Diem 3. Method for the preparation of the ethylene polymer composition according to claim 2, where the polymerization sections (c) and (d) are performed in the order that the (d) was processed with the ethylene polymer [III] obtained in the previous (C) procedure. 4. Method for the preparation of the ethylene polymer composition according to claim 2, where the amount of ethylene copolymer [IV] in the polymerization stage Section (d) is 20 -500 parts by weight, while the amount of ethylene polymer [III] obtained in step polymerization (c) is 100 parts by weight