| 摘要 |
<p>The invention relates to a composition containing magnesium, titanium, halogen and an inner electron donor. The composition is soluble, and it is prepared by bringing into contact with each other at a prescribed temperature and reacting the complex MgX12.nR1OH, where X1 is a halogen, R1 is a C¿1?-C20 alkyl, and n is in the range 2.0-6.4, a titanium tetrahalide TiX?2¿4, where X2 is a halogen, and a carboxylic acid ester, to yield a reaction product. The said reaction product is obtained in the liquid, preferably dissolved, state by using: (a) carboxylic acid ester that contains at least 8.j carbon atoms and is compatible with the following Formula (I): R?2(COOR3)¿j, where R2 is a j-valen C¿1?-C34 hydrocarbon group, R?3¿ is a C¿6?-C20 alkyl group, and j is an integer from 1 to 4; (b) a molar ratio R?2(COOR3)¿j/MgX1.nR1OH that is ≥ approximately 0.8/j; (c) a molar ratio TiX24/MgX12.nR1OH that is ≥ approximately n; (d) possibly an organic dissolvent substance S; and (e) a temperature that is in the range 40-200 °C.</p> |
