Abstract Polypropylene or copolymer of propylene with another Alpha olefin is produced by polymerizing propylene or propylene together with another Alpha -olefin, at a temperature below 80* C, in the presence of a three component catalyst system consisting of TiCl3 or TiCl3.1/3AlCl3, a trialkylaluminum or dialkylaluminum halide, and polyethyleneglycol dialkylether or polyethylenethioglycol dialkylthioether, and substantially in the absence of any solvent, whereby a number of advantages can be obtained such as not only the exemption from usual drawbacks of solvent polymerization, for example, solvent loss, increase of cost necessary for solvent recovery, etc.; but also the fact that the product can be used directly to molding without removing amorphous polypropylene (APP); increase in polymerization rate; no formation of appreciable atactic polymer is the copolymerization of propylene; higher bulk density of the product; easy removal of catalyst; etc.
A method for producing polypropylene according to claim 1 wherein said dialkylaluminum is selected from the group consisting of diethylaluminum chloride and diisobutylaluminum chloride.
Claim 2
Dependent Claim
34 words
A method for producing polypropylene according to claim 1 wherein said ether is selected from the group consisting of diethyleneglycol dimethylether, triethyleneglycol dimethylether, tetraethyleneglycol dimethylether, tetraethyleneglycol diethylether, diethylenethioglycol dimethylthioether, triethylenethioglycol dimethylthioether, and tetraethylenethioglycol diethylthioether.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein the mole ratio of said ether to said titanium member is from 0.001:1 to 0.3:1.
Claim 4
Dependent Claim
16 words
The method of claim 1 which is carried out in the absence of an inert diluent.
Claim 5
Independent Claim
164 words
A method for producing predominantly crystalline copolymers of propylene with another Alpha -olefin which comprises polymerizing propylene together with another Alpha -olefin in the liquid phase at a temperature below 80* C., in the presence of a three component catalyst system which consists of TiCl3. 1/3 AlCl3, dialkylaluminum halides wherein said alkyl has one to four carbon atoms and said halide is selected from chloride and bromide, and an ether selected from the group consisting of polyethyleneglycol dialkylethers and polyethylenethioglycol dialkylthioethers wherein said polyethyleneglycol or polyethylenethioglycol has two to five ethylene units and said alkyl has one to four carbon atoms, wherein the mole ratio of said dialkylaluminum halides to said TiCl3. 1/3 AlCl3 is at least 1:1, and the mole ratio of said ether to said TiCl3. 1/3 AlCl3 is up to 0.5:1; and in the absence of an inert diluent or in the presence of only as much inert diluent as is required for the preparation of a slurry of the catalyst.
Claim 6
Dependent Claim
31 words
A method for producing copolymers of propylene with another Alpha -olefin according to claim 6 wherein said dialkylaluminum halide is selected from the group consisting of diethylaluminum chloride and diisobutylaluminum chloride.
Claim 7
Dependent Claim
36 words
A method for producing copolymers of propylene according to claim 6 wherein said ether is selected from the group consisting of diethyleneglycol dimethylether, triethyleneglycol dimethylether, tetraethyleneglycol dimethylether, tetraethyleneglycol diethylether, diethylenethioglycol dimethylthioether, triethylenethioglycol dimethylthioether and tetraethylenethioglycol diethylthioether.
Claim 8
Dependent Claim
21 words
The method of claim 6 wherein the mole ratio of said ether to said titanium member is from 0.001:1 to 0.3:1.
Claim 9
Dependent Claim
16 words
The method of claim 6 which is carried out in the absence of an inert diluent.