摘要:
The present invention relates to MgCl.sub.2.mROH.nH.sub.2 O adducts, where R is a C.sub.1 -C.sub.10 alkyl, 2.ltoreq.m.ltoreq.4.2, 0.ltoreq.n.ltoreq.0.7, characterized by an X-ray diffraction spectrum in which, in the range of 2.theta. diffraction angles between 5.degree. and 15.degree., the three main diffraction lines are present at diffraction angles 2.theta. of 8.8.+-.0.2.degree., 9.4.+-.0.2.degree. and 9.8.+-.0.2.degree., the most intense diffraction lines being the one at 2.theta.=8.8.+-.0.2.degree., the intensity of the other two diffraction lines being at least 0.2 times the intensity of the most intense diffraction line. Catalyst components obtained from the adducts of the present invention are capable to give catalysts for the polymerization of olefins characterized by enhanced activity and stereospecificity with respect to the catalysts prepared from the adducts of the prior art.
摘要:
The present invention relates to MgCl2.mROH.nH2O adducts, where R is a C1-C10 alkyl, 2≦m≦4.2, 0≦n≦0.7 , characterized by an X-ray diffraction spectrum in which, in the range of 2&thgr; diffraction angles between 5° and 15°, the three main diffraction lines are present at diffraction angles 2&thgr; of 8.8±0.2°, 9.4±0.2° and 9.8±0.2°, the most intense diffraction lines being the one at 2&thgr;=8.8±0.2°, the intensity of the other two diffraction lines being at least 0.2 times the intensity of the most intense diffraction line. Catalyst components obtained from the adducts of the present invention are capable to give catalysts for the polymerization of olefins characterized by enhanced activity and stereospecificity.
摘要翻译:本发明涉及MgCl 2·mROH·nH 2 O加合物,其中R是C 1 -C 10烷基,2 <= m <= 4.2,0 <= n <0.7,其特征在于X射线衍射光谱,其中在 2θ衍射角在5°和15°之间的范围内,三条主要的衍射线分别以8.8±0.2°,9.4±0.2°和9.8±0.2°的衍射角2θ处存在,最强的衍射线为2θ= 8.8±0.2°,其他两条衍射线的强度为最强衍射线强度的至少0.2倍。 由本发明的加合物得到的催化剂组分能够提供催化剂用于以增强的活性和立体定向性为特征的烯烃聚合。
摘要:
The present invention relates to MgCl2.mROH.nH2O adducts, where R is a C1-C10 alkyl, 2≦m≦4.2, and 0≦n≦0.7, characterized by a differential scanning calorimetry (DSC) profile in which no peaks are present at temperatures below 90° C. or, if peaks are present below said temperature, the fusion enthalpy associated with said peaks is less than 30% of the total fusion enthalpy. Catalyst components obtained from the adducts of the present invention are capable to give catalysts for the polymerization of olefins characterized by enhanced activity and stereospecificity with respect to the catalysts prepared from the adducts of the prior art.
摘要翻译:本发明涉及MgCl 2·mROH·nH 2 O加合物,其中R是C 1 -C 10烷基,2 <= m <= 4.2,0 <= n <0.7,其特征在于差示扫描量热法(DSC) 在低于90℃的温度下不存在峰,或者如果在所述温度以下存在峰,则与所述峰相关联的熔融焓小于总熔融焓的30%。 从本发明的加合物获得的催化剂组分能够产生用于烯烃聚合的催化剂,其特征在于相对于由现有技术的加合物制备的催化剂具有增强的活性和立体定向性。
摘要:
The present invention relates to a process for the preparation of MgCl2.pROH.qH2O adducts, where R is a C1-C10 alkyl, 1≦p≦6, and 0≦q≦1, comprising the steps of (a) dispersing magnesium dichloride in an inert liquid, (b)adding the alcohol in vapour phase and maintaining the temperature at values allowing the adduct to be melted, (c)emulsifying the molten adduct in a liquid medium immiscible with and chemically inert to said adduct and, (d) contacting the adduct with an inert cooling liquid.
摘要:
The present invention relates to MgCl2.mROH.nH2O adducts, where R is a C1-C10 alkyl, 2≦m≦4.2, 0≦n≦0.7, characterized by an X-ray diffraction spectrum in which, in the range of 2&thgr; diffraction angles between 5° and 15°, the three main diffraction lines are present at diffraction angles 2&thgr; of 8.8±0.2°, 9.4±0.2° and 9.8±0.2°, the most intense diffraction lines being the one at 2&thgr;=8.8±0.2°, the intensity of the other two diffraction lines being at least 0.2 times the intensity of the most intense diffraction line. Catalyst components obtained from the adducts of the present invention are capable to give catalysts for the polymerization of olefins characterized by enhanced activity and stereospecificity with respect to the catalysts prepared from the adducts of the prior art.
摘要翻译:本发明涉及MgCl 2·mROH·nH 2 O加合物,其中R是C 1 -C 10烷基,2 <= m <= 4.2,0 <= n <0.7,其特征在于X射线衍射光谱,其中在 2θ衍射角在5°和15°之间的范围内,三条主要的衍射线分别以8.8±0.2°,9.4±0.2°和9.8±0.2°的衍射角2θ处存在,最强的衍射线为2θ= 8.8±0.2°,其他两条衍射线的强度是最强衍射线强度的0.2倍。由本发明的加合物得到的催化剂成分能够提供用于烯烃聚合的催化剂,其特征在于增强的 相对于由现有技术的加合物制备的催化剂的活性和立体定向性。
摘要:
The present invention relates to components of catalysts for the polymerization of olefins comprising a metallocene compound and a magnesium halide which have particular values of porosity and surface area. Group 4 and vanadium metallocenes are useful metallocenes and the components typically include an electron donor such as an ether, ester or ketone. In particular the components of the invention have surface area (BET) greater than about 50 m2/g, porosity (BET) greater than about 0.15 cm3/g and porosity (Hg) greater than 0.3 cm3/g, with the proviso that when the surface area is less than about 150 m2g, the porosity (Hg) is less than about 1.5 cm3/g. The magnesium halide is complexed by an ether, ester, or ketone electro donor. The components of the invention are particularly suitable for the preparation of catalysts for the gas-phase polymerization of &agr;-olefins.
摘要:
Components of bimetallic catalysts for the polymerization of olefins comprising a compound of a transition metal M selected from Ti, V, Zr and Hf containing at least one M-&pgr; bond, a compound of Ti or V not containing metal-&pgr; bonds and a support comprising a magnesium halide. The catalysts obtained from the components of the invention are particularly suitable for gas-phase polymerization processes.
摘要:
Components and catalysts for the polymerization of olefins comprising the product obtained by contacting a compound of a transition metal M, containing at least one M-.pi. bond, with an olefinic prepolymer obtained by polymerization of one or more olefins with a coordination catalyst comprising a compound of Ti or V supported on a magnesium halide.
摘要:
Components of bimetallic catalysts for the polymerization of olefins comprising a compound of a transition metal M selected from Ti, V, Zr and Hf containing at least one M-.pi. bond, a compound of Ti or V not containing metal-.pi. bonds and a support comprising a magnesium halide. The catalysts obtained from the components of the invention are particularly suitable for gas-phase polymerization processes.
摘要:
Crystalline polymers and copolymers of propylene in the form of spherical particles having a porosity (expressed in percentage of voids) greater than 15%. These polymers are useful in the preparation of masterbatch containing significant quantities of additives and/or pigments.