Polymerization catalysts, their production and use
AssigneeExxon Chemical Patents Inc.
InventorsRobert Lee Bamberger, Moses Olukayode Jejelowo
Life of this patent
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Abstract
The invention generally relates to a catalyst, particularly a metallocene catalyst and catalyst system useful in the polymerization of olefins into a polymer product. The polymer product has a broad molecular weight distribution, a high molecular weight and a narrow composition distribution and is easily processable.
Claims18
A polymeric film comprising at least one layer of a linear copolymer having a density in the range of about 0.900 g/cm.sup.3 to about 0.970 g/cm.sup.3, a CDBI of or greater than 50%, and a melt strength of or greater than 2+10/e.sup.MI where MI is the melt index of said copolymer and e is 2.71828, wherein said polymeric film exhibits a tensile stress value of about 20 MPa at an elongation of between 50 and 300%.
A polymeric film comprising at least one layer of a linear copolymer having a density in the range of about 0.900 g/cm.sup.3 to about 0.970 g/cm.sup.3, a CDBI of or greater than 50%, a melt index above 1.5 dg/min, and a melt strength of or hi greater than 2+15/e.sup.MI where MI is the melt index of said copolymer and e is 2.71828, wherein said polymeric film exhibits a haze of or less than 10%.
An article comprising a linear copolymer having a density in the range of about 0.900 g/cm.sup.3 to about 0.970 g/cm.sup.3, a CDBI of or greater than 50%, and a melt strength of or greater than 2+15/e.sup.MI where MI is the melt index of said copolymer and e is 2.71828, wherein said article is formed in a blow L molding, injection molding or roto molding process.
A blown film process, comprising:
- extruding a linear copolymer at commercial rates, said copolymer having a density in the range of about 0.900 g/cm.sup.3 to about 0.970 g/cm.sup.3, a CDBI of or greater than 50%, and a melt strength of or greater than 2+15/e.sup.MI, where MI is the melt index of said copolymer and e is 2.71828;
- and
- drawing said linear copolymer into a thin gauge.
A polymeric film comprising at least one layer of a linear copolymer having a density in the range of 0.900 to 0.970 g/cm.sup.3, a CDBI greater than 50%, I.sub.21 /I.sub.2 greater than 18, a melt strength greater than 3.0 cN, and Mz/Mw less than 2.5, wherein said polymeric film exhibits a tensile stress value of 20 MPa at an elongation of between 50 and 300%.
A polymeric film comprising at least one layer of a linear copolymer having a density in the range of about 0.910 g/cm.sup.3 to about 0.945 g/cm.sup.3, a CDBI of or greater than 50%, a melt index above 1.5 dg/min, and a melt strength of or greater than 2+15/e.sup.MI where MI is the melt index of said copolymer and e is 2.71829, wherein said polymeric film exhibits a haze of or less than 10%.
An article comprising a linear copolymer having a density in the range of about 0.910 g/cm.sup.3 to about 0.945 g/cm.sup.3, a CDBI of or greater than 50%, and a melt strength of or greater than 2+15/e.sup.MI where MI is the melt index of said copolymer and e is 2.71828, wherein said article is formed in a blow molding, injection molding or roto molding process.
Dependencies are inferred from the claim text.