High tensile strength amorphous 1-butene/propylene and ethylene/

Details High tensile strength amorphous 1-butene/propylene and ethylene/ High tensile strength amorphous 1-butene/propylene and ethylene/

1995-06-07

1998-02-03

Smith, Edward J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C08F 4649, C08F21016

Patent

active

057145547

ABSTRACT:
Amorphous propylene/1-butene and ethylene/propylene copolymers having increased tensile properties produced by the process comprising:
reacting propylene and 1-butene monomers or ethylene and propylene 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; and
(c) an alkoxy silane component of the formula R.sub.n Si(OR').sub.4-n where n=1-3, R=aryl or alkyl and R'=C.sub.1-3 alkyl.

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Translation of Japanese Kokai Pantent 59-206421.

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