High tensile strength amorphous 1-butene/propylene and ethlene/propylene copolymers
First Claim
1. An amorphous ethylene/propylene copolymer consisting essentially of:
- from 10 wt % to 20 wt % ethylene and from 90 wt % to 80 wt % propylene, said copolymer having a tensile strength between 100 psig and 350 psig, a melt viscosity between 6700 and 7700, the copolymer exhibiting a heat of fusion between 7.5 l/g. and 14.4 l/g and containing no heptane insolubles.
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Accused Products
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 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;
(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 Rn Si(OR'"'"')4-n where n=1-3, R=aryl or alkyl and R'"'"'=C1-3 alkyl.
54 Citations
9 Claims
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1. An amorphous ethylene/propylene copolymer consisting essentially of:
from 10 wt % to 20 wt % ethylene and from 90 wt % to 80 wt % propylene, said copolymer having a tensile strength between 100 psig and 350 psig, a melt viscosity between 6700 and 7700, the copolymer exhibiting a heat of fusion between 7.5 l/g. and 14.4 l/g and containing no heptane insolubles. - View Dependent Claims (2, 3, 4)
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5. An amorphous ethylene/propylene copolymer consisting essentially of:
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from 10 wt % to 20 wt % ethylene and from 90 wt % to 80 wt % propylene, said copolymer having a tensile strength between 100 psig and 350 psig, a needle penetration of between 5 and 24, and a melt viscosity between 6700 and 7700, the copolymer exhibiting a heat of fusion between 7.5 l/g and 14.4 l/g and containing no heptane insolubles; said copolymer having at least 20 mole % of the total ethylene contained in the copolymer present in blocks of at least 3 contiguous ethylene units. - View Dependent Claims (6, 7, 8)
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9. An amorphous ethylene/propylene copolymer consisting essentially of:
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from 10 wt % to 20 wt % ethylene and from 90 wt % to 80 wt % propylene, said copolymer having a tensile strength of between 100 psig and 350 psig, a tacticity index m/r greater than 4.0, a heat of fusion between 7.5 l/g and 14.4 l/g, and a melt viscosity between 6700 and 7700, a glass transition temperature between -47°
C. and -50°
C., a ring and ball softening point between 280°
F. and 285°
F., the copolymer containing no heptane insolubles and being further characterized by a needle penetration of between 5 and 24;said copolymer having at least 20 mole % of the total ethylene contained in the copolymer present in blocks of at least 3 contiguous ethylene units.
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Specification
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- Resources
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Current AssigneeRextac Llc
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Original AssigneeRexene Corp. (Huntsman Corporation)
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InventorsAllen, George C., Sustic, Andres
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Primary Examiner(s)Smith, Edward J.
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Application NumberUS08/473,289Time in Patent Office734 DaysField of Search526/348US Class Current526/348CPC Class CodesC08F 210/06 PropeneC08F 210/08 ButenesC08F 210/16 Copolymers of ethene with a...C08F 2500/16 SyndiotacticC08F 2500/17 ViscosityC08F 2500/20 Activation energy or enthalpyC08F 4/6465 containing siliciumC08F 4/6555 and magnesium or compounds ...
