RU96108127A - HOMO- AND COPYLIMERS OF ETHYLENE AND METHODS FOR THEIR PRODUCTION - Google Patents

Claims (12)

1. Homo- and copolymers of ethylene, which have a degree of swelling of at least 1.4, resistance to cracking under load for at least 55 hours, and a turnover rate of at least 0.2 g / 10 min. 2. Homo - and copolymers of ethylene according to claim 1, which have a turnover index (MI ₅ ), expressed in g / 10 min, and dynamic viscosity η, expressed in dPa · s and measured with a velocity gradient of 100 s ^-1 at 190 ^o C, corresponding to the ratio

. 3. Homo - and copolymers of ethylene according to claim 1 or 2, which have a standard bulk density of 952 - 958 kg / m ³ .  4. Homo - and copolymers of ethylene according to any one of paragraphs 1 to 3, which contain 0.1 - 10 wt.% Comonomer selected among butene, hexene and their mixtures.  5. A method of producing homo-and ethylene copolymers according to any one of claims 1 to 4, characterized in that ethylene is polymerized, if necessary, with one or more comonomers in two successively installed reactors in the presence of a solid catalyst comprising titanium and zirconium in a molar the ratio of Zr / Ti at least 2, and socialization, and in the first reactor serves ethylene, if necessary comonomer and / or hydrogen, solid catalyst and socialization, the reaction medium of the first reactor is transferred to the second reactor and in the second second reactor also introduced ethylene, optionally comonomer and / or hydrogen.  6. The method according to claim 5, characterized in that the solid catalyst contains 0.5 to 10 wt. % titanium, 5–40 wt.% zirconium, 20–80 wt.% halogen, 1–30 wt.% magnesium, and 0.5–10 wt.% aluminum.  7. A method of producing homo-and ethylene copolymers according to any one of claims 1 to 4, characterized in that ethylene is polymerized, if necessary, with one or more comonomers in two reactors connected in series in the presence of a first solid catalyst containing titanium as the only an active element, and a second solid catalyst containing titanium and zirconium as active elements, and a cocatalyst, ethylene, if necessary, a comonomer and / or hydrogen, is introduced into the first reactor; Dyje catalyst and cocatalyst, the first reactor, the reaction medium is transferred into the second reactor, the second reactor also introduced ethylene, optionally comonomer and / or hydrogen.  8. The method according to p. 7, characterized in that the first solid catalyst consists essentially of 10 to 30 wt.% Titanium, 20 to 60 wt.% Halogen, 0.5 to 20 wt.% Magnesium and 0.1 to 10 wt.% aluminum, and the second solid catalyst consists essentially of 0.5 - 10 wt.% titanium, 5 - 40 wt.% zirconium, 20 - 80 wt.% halogen, 1 - 30 wt.% magnesium and 0.5 - 10 wt.% Aluminum. 9. The method according to claims 5 and 7, characterized in that a solid catalyst is used, which is obtained by introducing into the reaction in the first stage an oxygen-containing organomagnesium compound with an oxygen-containing organotitanium compound and, possibly, an oxygen-containing organo-zirconium compound, to obtain a liquid complex with subsequent processing the obtained liquid complex in the second stage with the help of a halogen-containing organoaluminum compound of the general formula
AlR _n X _3-n ,
in which R represents a hydrocarbon radical, X represents a halogen and n is less than 3, and precipitates the liquid complex as a solid catalytic complex.  10. A method of producing homo- and copolymers of ethylene according to any one of claims 1 to 4, characterized in that ethylene is polymerized, if necessary, with one or more comonomers in one reactor in the presence of a solid catalyst containing chromium on a carrier containing at least measures two components selected from silica, alumina and aluminum phosphate, possibly in the presence of a cocatalyst and / or hydrogen.  11. A method of producing homo- and copolymers of ethylene according to claim 10, characterized in that ethylene is polymerized, if necessary, with one or more comonomers in two reactors arranged in series in the presence of a solid catalyst comprising chromium on a carrier containing at least two component selected from silicon dioxide, aluminum oxide and aluminum phosphate, and socializaton, and in the first reactor serves ethylene, if necessary, comonomer and / or hydrogen, solid catalyst, the reaction medium of the first reactor ra is transferred to the second reactor, the second reactor also introduced ethylene and optionally comonomer and / or hydrogen, cocatalyst is at least one of the two reactors. 12. The method according to p. 10 or 11, characterized in that the solid catalyst comprises 0.05 - 10 wt. % chromium and the carrier contains silica (X), alumina (Y) and aluminum phosphate (Z) in a molar ratio
(X): (Y): (Z) = (10 - 95): (1 - 80): (1 - 85)
13. The method according to PP.10-12, characterized in that the cocatalyst is a trialkylboron, and the alkyl radical contains up to 20 carbon atoms.