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AssigneeChevron Phillips Chemical Company LP
InventorsYoulu Yu, Eric D. Schwerdtfeger, Jeffrey S. Fodor, David A. Soules
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A bimodal polymer composition comprising a lower molecular weight homopolymer and a higher molecular weight copolymer wherein the bimodal polymer composition has a density of from about 0.930 gram per cubic centimeter (g/cc) to about 0.970 g/cc, a ratio of high load melt index:melt index of from about 10 to about 150 and an Environmental Stress Crack Resistance (ESCR) of from about 25 hours to about 300 hours when measured in accordance with ASTM D1693 or ASTM D2561. A chromium-catalyzed polymer composition comprising (i) a lower molecular weight homopolymer and (ii) a higher molecular weight copolymer, wherein the bimodal polymer composition has an Environmental Stress Crack Resistance (ESCR) of from about 25 hours to about 300 hours when measured in accordance with ASTM D1693 or ASTM D2561.
A chromium-catalyzed bimodal polymer composition comprising a lower molecular weight (LMW) homopolymer and a higher molecular weight (HMW) copolymer wherein the bimodal polymer composition has a density of from about 0.930 gram per cubic centimeter (g/cc) to about 0.970 g/cc, a ratio of high load melt index:melt index of from about 10 to about 150, an Environmental Stress Crack Resistance (ESCR) of from about 25 hours to about 300 hours when measured in accordance with ASTM D1693 or ASTM D2561, a z-average molecular weight (Mz) of from about 650,000 g/mol to about 3,500,000 g/mol and a primary structure parameter (PSP2) of from about 6.0 to about 13.
A chromium-catalyzed polymer composition comprising (i) a lower molecular weight homopolymer and (ii) a higher molecular weight copolymer, wherein the bimodal polymer composition has an Environmental Stress Crack Resistance (ESCR) of from about 25 hours to about 300 hours when measured in accordance with ASTM D1693 or ASTM D2561 a z-average molecular weight (Mz) of from about 650,000 g/mol to about 3,500,000 g/mol and a primary structure parameter (PSP2) of from about 6.0 to about 13.
A bimodal polymer composition comprising a high molecular weight (HMW) component and a low molecular weight (LMW) component, wherein a ratio of a Mw of the BMW component to a Mw of the LMW component is from greater than about 1 to about 7, a ratio of a Mp of the BMW component to a Mp of the LMW component is from greater than about 1 to about 40, the polymer composition has a z-average molecular weight (Mz) of from about 650,000 g/mol to about 3,500,000 g/mol and a primary structure parameter (PSP2) of from about 6.0 to about 13.
Dependencies are inferred from the claim text.