High tensile strength amorphous 1-butene/propylene and ethlene/propylene copolymers
US5637665A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Jun 10, 1997 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F210/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Amorphous propylene/1-butene and ethylene/propylene copolymers having increased tensile properties produced by the process comprising: PA1 reacting propylene and 1-butene monomers or ethylene and propylene monomers in the presence of a catalyst system comprising: PA1 (a) a solid supported catalyst component is prepared by the method comprising: (i) co-comminuting magnesium halide support base and alumminum 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; PA1 (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 PA1 (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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.