摘要:
In a process for producing polypropylene comprising polymerizing propylene in the presence of hydrogen and a catalyst system comprising (A) titanium trichloride obtained by reducing titanium tetrachloride with an organoaluminum compound and reacting the reduced solid with an ether represented by the formula:R.sup.1 --O--R.sup.2wherein R.sup.1 and R.sup.2 are defined hereinbefore, and a halogen compound selected from the group consisting of (i) halogen or interhalogen compounds of the formula, X.sup.1 X.sup.2.sub.a (wherein X.sup.1, X.sup.2 and a are defined hereinbefore), (ii) titanium halides, and (iii) organic halogen compounds, simultaneously or successively and (B) an organoaluminum compound, the improvement which comprises supplying ethylene together with propylene to the polymerization system such that the ethylene concentration in the vapor phase of the system based on the total amount of propylene, ethylene and hydrogen in the vapor phase of the system is 0.15 to 1.5 mol % to obtain a propylene-ethylene copolymer having an ethylene content of from 0.1 to 1.0 wt % is disclosed. The propylene-ethylene copolymer is improved in stretchability.
摘要:
A molded product of polypropylene having an isotactic pentad fraction of the boiling heptane insoluble portion of at least about 0.955 and a boiling heptane solubles content of about 2.0 to 9.0% by weight. The molded products include a stretched film, insulating materials for electrical equipment, etc.
摘要:
In a process for producing a homopolymer or a copolymer of propylene comprising polymerizing propylene or copolymerizing propylene and at least one other unsaturated hydrocarbon monomer in liquid propylene using a catalyst system containing activated titanium trichloride (a) and an organoaluminum compound (b), the activated titanium trichloride (a) being prepared by reducing titanium tetrachloride with an organoaluminum compound followed by activation, to produce a polymer slurry; introducing the polymer slurry produced into the top of a counter-current washing tower; and washing the polymer slurry by counter-currently contacting the polymer slurry with liquid propylene introduced into the bottom of the washing tower, the improvement which comprises purifying the homopolymer or copolymer of propylene by feeding an epoxide in a molar amount of about 1 to about 15 times the molar amount of the total of activated titanium trichloride (a) and organoaluminum compound (b), to a part of said washing tower, thereby deactivating the catalyst and removing the catalyst residue and the homopolymer or copolymer of propylene dissolved in the polymer slurry.
摘要:
A molded product of polypropylene having an isotactic pentad fraction of the boiling heptane insoluble portion of at least about 0.955 and a boiling heptane solubles content of about 2.0 to 9.0% by weight. The molded products include a stretched film, insulating materials for electrical equipment, etc.
摘要:
In a process for producing polypropylene comprising polymerizing propylene in the presence of hydrogen and a catalyst system comprising (A) titanium trichloride obtained by reducing titanium tetrachloride with an organoaluminum compound and reacting the reduced solid with an ether represented by the formula:R.sup.1 -O-R.sup.2wherein R.sup.1 and R.sup.2 are defined hereinbefore, and a halogen compound selected from the group consisting of (i) halogen or interhalogen compounds of the formula, X.sup.1 X.sup.2.sub.a (wherein X.sup.1, X.sup.2 and a are defined hereinbefore), (ii) titanium halides, and (iii) organic halogen compounds, simultaneously or successively and (B) an organoaluminum compound, the improvement which comprises supplying ethylene together with propylene to the polymerization system such that the ethylene concentration in the vapor phase of the system based on the total amount of propylene, ethylene and hydrogen in the vapor phase of the system is 0.15 to 1.5 mol % to obtain a propylene-ethylene copolymer having an ethylene content of from 0.1 to 1.0 wt % is disclosed. The propylene-ethylene copolymer is improved in stretchability.
摘要:
A solid catalyst for polymerization of olefins prepared by treatment of a titanium trichloride composition with a mixture of (1) a halogen, an interhalogen compound or a halogenated hydrocarbon compound, and (2) an ether which, in combination with organoaluminum compounds as activators, can be used to polymerize olefins for the efficient production of highly crystalline olefin polymers.
摘要:
A process for producing propylene-ethylene block copolymers by a three-step polymerization technique using a stereoregular catalyst, characterized in that the first-step polymerization is carried out by supplying propylene alone or a propylene/ethylene mixture so that the ethylene/propylene reaction ratio is 6/94 or less, thereby polymerizing 60 to 95% by weight of the total polymerization amount, the second-step polymerization is carried out by supplying a propylene/ethylene mixture so that the ethylene/propylene reaction ratio is 15/85 to 79/21, thereby polymerizing 1 to 20% by weight of the total polymerization amount, and the third-step polymerization is carried out by supplying a propylene/ethylene mixture so that the ethylene/propylene reaction ratio is 50/50 to 89/11, thereby polymerizing 4 to 35% by weight of the total polymerization amount, with the ethylene/propylene reaction ratio in the third step made larger than that in the second step. Said process can give propylene-ethylene block copolymers markedly well balanced in impact strength, stiffness, transparency and impact blushing.
摘要:
A catalyst comprising:(A) a solid catalyst component containing a tri-valent titanium compound, which is obtained by reducing a titanium compound represented by the general formula Ti(OR.sup.1).sub.n X.sub.4-n (wherein R.sup.1 is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen atom and n is a number satisfying 0
摘要翻译:一种催化剂,其包含:(A)含有三价钛化合物的固体催化剂组分,其通过还原由通式Ti(OR 1)n X 4-n表示的钛化合物(其中R 1是具有1至20个 碳原子,X是卤素原子,n是满足0
摘要:
A process for producing .alpha.-olefin polymers of a high stereoregularity which comprises homopolymerizing an .alpha.-olefin having 3 to 10 carbon atoms or copolymerizing said .alpha.-olefin with other olefins of the same group or with ethylene using a catalyst system comprising three components (A), (B) and (C):(A) a solid catalyst produced by reaction among a solid product described below, a compound group (III) comprising at least one compound having an O--C.dbd.O linkage and at least one compound having at least one member selected from C--O--H, C--O--C, C--N, C.tbd.N, N--O--C, P--O--C, P--N--C, C--S--H, C--S--C, S--O--C and P--S--C linkages, and a titanium compound having at least one titanium-halogen linkage, said solid product being prduced by reacting an organo-magnesium compound with at least one of the following halogen-containing compounds (I) and (II),(I) a halogeno-silicon compound of the formula, R.sub.n SiX.sub.4-n (in which R is a hydrocarbon group having 1 to 8 carbon atoms, X is a halogen atom and n is a number satisfying the equation, 0.ltoreq.n
摘要翻译:一种制备高立构规整性的α-烯烃聚合物的方法,其包括使具有3至10个碳原子的α-烯烃均聚或使用包含三种组分的催化剂体系(A ),(B)和(C):(A)通过下述固体产物之间的反应生成的固体催化剂,包含至少一种具有OC = O键的化合物的化合物组(III)和至少一种具有 选自COH,COC,CN,C 3BOND N,NOC,POC,PNC,CSH,CSC,SOC和PSC键的至少一种成员和具有至少一个钛 - 卤素键的钛化合物,所述固体产物通过 具有下述卤素化合物(I)和(II)中的至少一种的有机镁化合物,(I)下式的卤代硅化合物,R n SiX 4-n(其中R是烃基,具有1〜 8个碳原子,X是卤素原子,n 是满足方程式的数,0 <= n <4),(II)式为R 1 AlX 3 -1的卤代铝化合物(其中R是具有1至8个碳原子的烃基,X是卤素 原子和l是满足式(1)的数,0≤l≤3),(B)式R活化剂RmAlY3-m(其中R为碳原子数为1〜8的烃基,Y为 卤原子或氢原子,当Y为卤素原子时,m为满足式2,m为3的数,当Y为氢原子时,m为满足式2的数 (C)至少一个具有至少一个氮,氧,磷或硫原子的电子给体。
摘要:
A process for producing a solid titanium trichloride catalyst which comprisesat a temperature of -40.degree. C. to 40.degree. C. mixing titanium tetrachloride with an organo-aluminum compound of the formula (I):AlR.sub.n X.sub.3-n (I) wherein R has up to 10 carbon atoms and is an aliphatic hydrocarbon group which may be straight chain, branched chain or cyclic, or an aromatic hydrocarbon group; X is a halogen atom or a hydrogen atom; and n is a number satisfying the relation, 1.5.ltoreq.n.ltoreq.3; in the presence of an ether compound of the formula (II):R.sup.2 OR.sup.3 (II) wherein R.sup.2 and R.sup.3, which may be the same or different, each is an alkyl group, an aralkyl group or an alkenyl group, each having up to 10 carbon atoms, to reduce the titanium tetrachloride; maintaining the mixed solution at a temperature of 10.degree. C. to 50.degree. C. thereby performing the reduction;at the time when the reduction reaction proceeds at least 90%, adding iodine to the resulting liquid titanium trichloride product;maintaining the resulting mixture at a temperature of about 30.degree. C. to about 150.degree. C. after the addition thereby precipitating solid titanium trichloride; and then separating the solid titanium trichloride.
摘要翻译:一种制备固体三氯化钛催化剂的方法,其包括在-40℃至40℃的温度下,将四氯化钛与式(I)的有机铝化合物:其中R具有的AlRnX 3-n(I) 最多10个碳原子,并且是可以是直链,支链或环状的脂族烃基或芳族烃基; X是卤素原子或氢原子; 并且n是满足关系式的数,1.5 i = 3; 在式(II)的醚化合物的存在下:R 2 OR 3(II)其中R 2和R 3可以相同或不同,各自为烷基,芳烷基或烯基,每个具有至多10个 碳原子,以减少四氯化钛; 将混合溶液保持在10℃至50℃的温度,从而进行还原; 当还原反应进行至少90%时,向得到的液体三氯化钛产物中加入碘; 在加入后将所得混合物保持在约30℃至约150℃的温度,由此沉淀出固体三氯化钛; 然后分离固体三氯化钛。