Abstract: Dual transition metal compounds containing titanium and chromium are prepared by reacting a hydrocarbyloxy titanium halide with CrO.sub.3. The compounds are useful in catalysts for the polymerization of .alpha.-olefins.

Abstract: .alpha.-olefins are polymerized with a catalyst prepared from (1) an inert support, (2) the reaction product of a tetravalent hydrocarbyloxy titanium halide such as di-n-butoxy titanium dichloride and hexavalent chromium oxide and (3) an organometal activating agent such as a tri alkyl aluminum.

Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins are provided by reacting a dinitrogen and/or dihydrogen complex of a transition metal such as titanium with an organometallic compound of a divalent metal such as dihydrocarbyl magnesium or hydrocarbyl magnesium halide and a halide source such as alkyl aluminum halide. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics.

Abstract: New polyhydroxy-containing compounds represented by the formula ##SPC1##Wherein A is --O-- or an alkylidene group having 1 to 4 carbon atoms, Y.sub.1, Y.sub.2, Y.sub.3 and Y.sub.4 are independently selected from --OH or ##SPC2##(wherein R is selected from hydrogen, a halogen atom and an alkyl group having 1 to 4 carbon atoms), X and X.sub.1 are independently selected from hydrogen, a halogen atom or the group ##SPC3##(wherein R is as defined above), R.sub.1 and R.sub.2 are selected from hydrogen, a hydroxyl group, and an alkyl group having from 1-4 carbon atoms, m is the number 0 or 1 and n and n.sub.1 are numbers independently selected from 1 to 20. A process for their preparation is disclosed as well as new epoxy resins prepared therefrom which may be represented by the formula ##SPC4##Wherein A, m, n, and n.sub.1 are defined above and Y.sub.1, Y.sub.2, Y.sub.3 and Y.sub.