Nippon Oil Company

Nippon Mitsubishi Oil Corporation

Yosuke Numao

Yoshio Tajima

Kazuo Matsuura

Takashi Seki

Naoki Kataoka

Takuya Matsumoto

Akira Takagi

Tadahiro Kaminade

Takayuki Hirayama

Masato Sone

A high-quality optical compensator for use in liquid crystal display elements can be prepared from a film comprising an end unit modified liquid crystalline polymer which has a monofunctional structural unit and which exhibits an optically positive uniaxiality, and, as needed, a liquid crystalline polymer which has a logarithmic viscosity at least 0.01 dl/g higher than that of the end unit modified liquid crystalline polymer and a glass transition point at least 5&deg; C. higher than that of the end unit modified liquid crystalline polymer and which exhibits an optically positive uniaxiality, wherein a nematic hybrid orientation which is formed in the liquid crystal state is immobilized.

Optical film

A catalyst component is disclosed for use in the homo- or copolymerization of olefinic hydrocarbons. The catalyst component is comprised of a first compound of the formula M.sup.1 (OR.sup.1).sub.p R.sup.2.sub.q X.sup.1.sub.4-p-q, M.sup.1 being titanium a second compound of the formula M.sup.2 (OR.sup.3).sub.m R.sup.4.sub.n X.sup.2.sub.z-m-n, with M.sup.2 being a metal of Groups Ia-IIIa or IIb of the Periodic Table, and a third compound which is an organocyclic compound having two or more conjugated double bonds. A process is also disclosed for the production of hydrocarbon polymers in which the above catalyst component is combined with a modified organoaluminum compound to form a catalyst composition capable of providing controlled molecular weight, wide distribution thereof and other desirable qualities in the polymer product.

Catalyst components for polymerization of olefins

A process for the polymerization of olefinic hydrocarbons is carried out in the presence of a catalyst comprising a catalyst component derived from reacting a compound of the formula Me.sup.1 R.sup.1.sub.n X.sup.1.sub.4-n, a compound of the formula Me.sup.2 R.sup.2.sub.m X.sup.2.sub.z-m, an organocyclic compound having two or more conjugated double bonds and a carrier of inorganic or polymeric material, and a modified organoaluminum compound having Al--O--Al bonds, the resulting polyolefins having a relatively wide molecular weight distribution, a relatively narrow composition distribution and increased bulk density.

A catalyst component is disclosed for use in the homo- or copolymerization of olefinic hydrocarbons. The catalyst component is comprised of a first compound of the formula Me.sup.1 (OR.sup.1).sub.p R.sup.2.sub.q X.sup.1.sub.4-p-q and a second compound which is an organocyclic compound having two or more conjugated double bonds. A process is also disclosed for the production of hydrocarbon polymers in which the above catalyst component is combined with a modified organoaluminum compound to form a catalyst composition capable of providing high molecular weight, wide distribution thereof and other desirable qualities in the polymer product.

Process for the polymerization of olefinic hydrocarbons

A catalyst component is disclosed for use in the homo- or copolymerization of olefinic hydrocarbons. The catalyst component is comprised of a first compound of the formula Me.sup.1 (OR.sup.1).sub.p R.sup.2.sub.q X.sup.1.sub.4-p-q and a second compound which is an organocyclic compound having two or more conjugated double bonds. A process is also disclosed for the production of hydrocarbon polymers in which the above catalyst component is combined with a modified or organoaluminum compound to form a catalyst composition capable of providing high molecular weight, wide distribution thereof and other desirable qualities in the polymer product.

Method for polymerization of olefins

A catalyst component is disclosed for use in the homo-or copolymerization of olefinic hydrocarbons. The catalyst component is comprised of a first compound of the formula Me.sup.1 (OR.sup.1).sub.p R.sup.2.sub.q X.sup.1.sub.4-p-q, a second compound of the formula Me.sup.2 (OR.sup.3).sub.m R.sup.4.sub.n X.sup.2.sub.z-m-n and a third compound which is an organocyclic compound having two or more conjugated double bonds. A process is also disclosed for the production of hydrocarbon polymers in which the above catalyst component is combined with a modified organoaluminum compound to form a catalyst composition capable of providing controlled molecular weight, wide distribution thereof and other desirable qualities in the polymer product.

Process for polymerization of olefinic hydrocarbon

A catalyst component is disclosed for use in the homo- or copolymerization of olefinic hydrocarbons. The catalyst component is comprised of a first compound of the formula Me.sup.1 (OR.sup.1).sub.p R.sup.2.sub.q X.sup.1.sub.4-p-q, a second compound of the formula Me.sup.2 (OR.sup.3).sub.m R.sup.4.sub.n X.sup.2.sub.z-m-n and a third compound which is an organocyclic compound having two or more conjugated double bonds. A process is also disclosed for the production of hydrocarbon polymers in which the above catalyst component is combined with a modified organoaluminum compound to form a catalyst composition capable of providing controlled molecular weight, wide distribution thereof and other desirable qualities in the polymer product.

Polyolefins having a high molecular weight, an appropriate molecular weight distribution and a relatively narrow composition distribution are prepared in high activity. The polymerization of an olefin or olefins is performed in the presence of a catalyst comprising a catalyst component and a modified organoaluminum compound, the catalyst component being prepared by mutually contacting (1) a compound of the general formula Me.sup.1 R.sup.1.sub.n X.sup.1.sub.4-n and (2) an alkali metal salt of cyclopentadiene or indene and optionally (3) a compound of the general formula Me.sup.2 R.sup.2.sub.m X.sup.2.sub.3-m, and the modified organoaluminum compound and water and containing Al--O--Al bond(s).

Process for preparing polyolefines

A catalyst component is disclosed for use in the homo-or copolymerization of olefinic hydrocarbons. The catalyst component is comprised of a first compound of the formula Me.sup.1 (OR.sup.1).sub.p R.sup.2.sub.q X.sup.1.sub.4-p-q and a second compound which is an organocyclic compound having two or more conjugated double bonds. A process is also disclosed for the production of hydrocarbon polymers in which the above catalyst component is combined with a modified organoaluminum compound to form a catalyst composition capable of providing high molecular weight, wide distribution thereof and other desirable qualities in the polymer product.

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Yokohama, Japan

Yosuke Numao