Alpha-olefin homo- or copolymer compositions
a technology of alpha-olefin and copolymer, which is applied in the field of new compositions of alpha-olefin homoor copolymer, can solve the problems of reducing the molecular weight distribution of polymers, and affecting the composition of polymers
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example 1
[0234]All raw materials were essentially free from water and air and all material additions to the reactor and the different steps were done under inert conditions in nitrogen atmosphere. The water content in propylene was less than 5 ppm.
[0235]The catalyst was a highly active and stereo specific Ziegler Natta catalyst (ZN catalyst) prepared according to patent W003 / 000754, example 7, and had Ti content 3.37 w-%.
[0236]The polymerisation was done in a 5 litre reactor, which was heated, vacuumed and purged with nitrogen before taken into use. 553 μl TEA (triethyl aluminum, from Witco), 81 μl donor (cyclohexyl methyl dimethoxy silane, from Wacker, dried with molecular sieves) and 20 ml pentane (dried with molecular sieves and purged with nitrogen) were mixed and allowed to react for 5 minutes. Half of the mixture was added to the reactor after which the reactor was charged with 70 mmol hydrogen and 1400 g propylene. The other half of the mixture was mixed with 23.0 mg ZN catalyst in a ...
example 2
[0240]This example was done in accordance with example 1, with the exception that the hydrogen amount was 800 mmol. The details and results are seen in table 1.
example 3
[0243]This example was done in accordance with example 1, with the exception that as the donor dicyclopentyl dimethoxy silane with Al / Do ratio 50 was used and that the hydrogen amount was 600 mmol. The details and results are seen in table 1.
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