Polyolefins and methods to produce polyolefins having increased melt properties at low shear rates
AssigneeExxon Chemical Company Law Technology
InventorJean-Marc C. M. G. Dekoninck
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Abstract
This invention relates to a method for increasing melt properties such as melt strength, melt viscosity, hot tack and processability of a polyolefin by combining a networking agent with a polyolefin preferably by combining substituted or unsubstituted sorbitol or isomers or derivatives thereof with a polyolefin.
Claims10
A method to increase low shear rate melt viscosity of a polyolefin having a molecular weight distribution of 3 or less, said method comprising blending said polyolefin with 0.005 weight percent to 1.0 weight percent of dibenzylidene sorbitol, based upon the weight of the polyolefin to form a blend, wherein the melt viscosity of the blend as compared to the polyolefin is increased by at least about 50 percent at deformation rates of 1 sec.sup.-1 or less and by 10 percent or less at deformation rates of greater than about 100 sec.sup.-1 or more.
Dependencies are inferred from the claim text.