Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1974-12-04
1979-01-23
Smith, Edward J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
252429B, 526128, 526140, 526141, 526142, 526351, C08F 466, C08F 1006
Patent
active
041362438
ABSTRACT:
An olefine polymerisation catalyst comprises a titanium trichloride component of high surface area, an organo-metallic component, a Lewis Base component and optionally a polyene. The TiCl.sub.3 component which may have a high porosity is conveniently obtained by the reaction of TiCl.sub.4 and an organo-aluminium compound, treating the reaction product with a complexing agent and then contacting this product with TiCl.sub.4. The organo-metallic component is preferably aluminium triethyl, the Lewis Base component hexamethylphosphoric triamide and the polyene is cycloheptatriene. This system has high polymerisation activity combined with good stereospecificity. Polypropylene can be obtained in high yield thereby giving low catalyst residues and the polymer has a high stiffness modulus.
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Appleyard George D.
Caunt Anthony D.
Fortuin Michael S.
Heggs Thomas G.
Imperial Chemical Industries Limited
Smith Edward J.
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