| abstract |
A novel soluble composition containing magnesium, titanium, a halogen and a carboxylic acid ester has been invented. The composition has mainly the composition according to the formula (I): (MgX32)xTiX44 (R(COOR')n)y wherein X3 is a halogen, X4 is a halogen, R(COOR')¿n? is a carboxylic acid higher alkyl ester containing at least 8.n carbon atoms, wherein R is an n-valent substituted or unsubstituted C1-C34 hydrocarbon group, R' is a C1-C20 alkyl group, and n is an integer from 1 to 4, x is between 0.5 and 4.0, and y is between 0.8/n and 2.4/n. |