High tensile strength amorphous 1-butene/propylene copolymers
First Claim
1. A process for the production of an amorphous propylene/1-butene copolymers comprising:
- reacting propylene and 1-butene monomers in the presence of a catalyst system comprising;
(a) a solid supported catalyst component is prepared by the method comprising;
(i) co-comminuting magnesium halide support base and aluminum trihalide in a molar ratio from about 8;
0.5 to about 8;
3 in the absence of added electron donor; and
(ii) then co-comminuting the product of step (i) in the absence of added electron donor with sufficient titanium tetrahalide to provide a molar ratio of magnesium halide to titanium tetrahalide from about 8;
0.1 to about 8;
1.0.(b) a trialkylaluminum co-catalyst, having from 1 to 9 carbon atoms in each alkyl group in an amount such that the Al/Ti ratio is between about 50;
1 and about 500;
1.(c) an alkoxy silane component in a sufficient quantity such that the molar ratio of organoaluminum co-catalyst to alkoxy silane is in the range from about 20;
1 to about 45;
1;
said amorphous copolymer being characterized by a propylene content of 25 to 50 wt% and 1-butene content of 75 to 50 wt%.
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Abstract
A process for the production of propylene/1-butene copolymers comprising:
reacting propylene and 1-butene monomers in the presence of a catalyst system comprising:
(a) a solid supported catalyst component is prepared by the method comprising: (i) co-comminuting magnesium halide support base and aluminum trihalide in a molar ratio from about 8:0.5 to about 8:3 in the absence of added electron donor; and (ii) then co-comminuting the product of step (i) in the absence of added electron donor with sufficient titanium tetrahalide to provide a molar ratio of magnesium halide to titanium tetrahalide from about 8:0.1 to about 8:1.0.
(b) a trialkylaluminum co-catalyst, having from 1 to 9 carbon atoms in each alkyl group in an amount such that the Al/Ti ratio is between about 50:1 and about 500:1.
(c) an alkoxy silane component of the formula Rn Si(OR'"'"')4-n where n=1-3, R=aryl or alkyl and R'"'"'=C1-3 alkyl in a sufficient quantity such that the molar ratio of organoaluminum co-catalyst to alkoxy silane is in the range from about 20:1 to about 45:1.
said copolymer being characterized by a propylene content of 25 to 50 wt%, a 1-butene content of 75 to 50 wt% and a tensile strength of at least 300 psig.
63 Citations
19 Claims
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1. A process for the production of an amorphous propylene/1-butene copolymers comprising:
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reacting propylene and 1-butene monomers in the presence of a catalyst system comprising; (a) a solid supported catalyst component is prepared by the method comprising;
(i) co-comminuting magnesium halide support base and aluminum trihalide in a molar ratio from about 8;
0.5 to about 8;
3 in the absence of added electron donor; and
(ii) then co-comminuting the product of step (i) in the absence of added electron donor with sufficient titanium tetrahalide to provide a molar ratio of magnesium halide to titanium tetrahalide from about 8;
0.1 to about 8;
1.0.(b) a trialkylaluminum co-catalyst, having from 1 to 9 carbon atoms in each alkyl group in an amount such that the Al/Ti ratio is between about 50;
1 and about 500;
1.(c) an alkoxy silane component in a sufficient quantity such that the molar ratio of organoaluminum co-catalyst to alkoxy silane is in the range from about 20;
1 to about 45;
1;said amorphous copolymer being characterized by a propylene content of 25 to 50 wt% and 1-butene content of 75 to 50 wt%. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A process for the production of an amorphous propylene/1butene copolymers comprising:
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reacting propylene and 1-butene monomers in the presence of a catalyst system comprising; (a) a solid supported catalyst component is prepared by the method comprising;
(i) co-comminuting magnesium halide support base and aluminum trihalide in a molar ratio from about 8;
0.5 to about 8;
3 in the absence of added electron donor; and
(ii) then co-comminuting the product of step (i) in the absence of added electron donor with sufficient titanium tetrahalide to provide a molar ratio of magnesium halide to titanium tetrahalide from about 8;
0.1 to about 8;
1.0.(b) a trialkylaluminum co-catalyst, having from 1 to 9 carbon atoms in each alkyl group in an amount such that the Al/Ti ratio is between about 50;
1 and about 500;
1.(c) an alkoxy silane component of the formula Rn Si(OR'"'"')4-n where n=1-3, R=aryl or alkyl and R'"'"'=C1-3 alkyl in a sufficient quantity such that the molar ratio of organoaluminum co-catalyst to alkoxy silane is in the range from about 20;
1 to about 45;
1;said amorphous copolymer being characterized by a propylene content of 25 to 50 wt%, a 1-butene content of 75 to 50 wt% and a tensile strength of at least 300 psig. - View Dependent Claims (9, 10, 11, 12)
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13. A copolymer comprising:
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from 25 to 50 wt% propylene and from 75 to 50 wt% 1-butene characterized by a tensile strength of greater than 300 psig; said copolymer containing no heptane insolubles and being further characterized by having no detectable heat of fusion.
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14. The copolymer of claim 14 wherein the copolymer is produced by the process comprising:
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reacting propylene and 1-butene monomers in the presence of a catalyst system comprising; (a) a solid supported catalyst component is prepared by the method comprising;
(i) co-comminuting magnesium halide support base and aluminum trihalide in a molar ratio from about 8;
0.5 to about 8;
3 in the absence of added electron donor; and
(ii) then co-comminuting the product of step (i) in the absence of added electron donor with sufficient titanium tetrahalide to provide a molar ratio of magnesium halide to titanium tetrahalide from about 8;
0.1 to about 8;
1.0.(b) a trialkylaluminum co-catalyst, having from 1 to 9 carbon atoms in each alkyl group in an amount such that the Al/Ti ratio is between about 50;
1 and about 500;
1.(c) an alkoxy silane component in a sufficient quantity such that the molar ratio of organoaluminum co-catalyst to alkoxy silane is in the range from 20;
1 to about 45;
1. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification