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US 10,894,877 B2Granted
High molecular weight polyethylene composition, product and process of making same
AssigneeDesgagné, Brown Et AssociéS Inc.
InventorJohn P. Brown
Life of this patent
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Abstract
This disclosure relates to a novel type of high molecular weight polyethylene composition, and product made from said composition, with industrially useful properties, and the process of making said composition and product.
Claims16
A process for preparing an polyethylene product, said process comprising the steps of:
- (a) providing:
- i) a first virgin polyethylene resin, having a bimodal molecular weight distribution which is high molecular weight (HMW), having a high load melt index measured according ASTM D-1238 (HLMI) of from about 1 to 6 g/10 min;
- and comprising a particle size distribution of less than about 50 μm;
- ii) a second virgin polyethylene resin, an HLMI of from about 20-70 g/10 min, a melt flow index measured according ASTM D-1238 (MFI) of from about 0.20-0.60 g/10 min, and comprising a particle size distribution of less than about 50 μm;
- iii) a first post-consumer polyethylene resin, having a MFI of from about 0.10-0.70 g/10 min;
- iv) a second post-consumer polyethylene resin, which is HMW, and having a HLMI of from about 4-8 g/10 min;
- and
- v) a polyethylene antioxidant;
- (b) blending i) to v) from step (a);
- and
- (c) melting and shaping the blend from step (b) to obtain said polyethylene product;
- wherein said product has at least one property selected from a density of about 0.94-0.96 g/cm3, a MFI of about 0.05-0.15 g/10 min, a HLMI of about 9-11 gr/10 min, a notched Izod impact factor of >8 ft-lb/in assessed according to ASTM D256, a Flexural Modulus at 2% strain of about 950-1200 Mpa assessed according to ASTM D790 and Tensile Yield of greater than about 25 Mpa assessed according to ASTM D638.
9 more elements
A polyethylene product comprising a composition comprising:
- i) a first virgin polyethylene resin, having a bimodal molecular weight distribution which is high molecular weight (HMW), having a high load melt index measured according ASTM D-1238 (HLMI) of from about 1 to 6 g/10 min;
- and comprising a particle size distribution of less than about 50 μm
- ii) a second virgin polyethylene resin, an HLMI from about 20-70 g/10 min, a melt flow index measured according ASTM D-1238 (MFI) of from about 0.20-0.60 g/10 min, and comprising a particle size distribution of less than about 50 μm;
- iii) a first post-consumer polyethylene resin, having a MFI of from about 0.10-0.70 g/10 min;
- iv) a second post-consumer polyethylene resin, which is HMW, and having a HLMI of from about 4-8 g/10 min;
- and
- v) a polyethylene antioxidant;
- wherein said product has at least one property selected from a density of about 0.94-0.96 g/cm3, a MFI of about 0.05-0.15 g/10 min, a HLMI of about 9-11 gr/10 min, a notched Izod impact factor of >8 ft-lb/in assessed according to ASTM D256, a Flexural Modulus at 2% strain of about 950-1200 Mpa assessed according to ASTM D790 and Tensile Yield of greater than about 25 Mpa assessed according to ASTM D638.
5 more elements
A composition comprising:
- i) a first virgin polyethylene resin, having a bimodal molecular weight distribution which is high molecular weight (HMW), having a high load melt index measured according ASTM D-1238 (HLMI) of from about 1 to 6 g/10 min;
- and comprising a particle size distribution of less than about 50 μm
- ii) a second virgin polyethylene resin, an HLMI from about 20-70 g/10 min, a melt flow index measured according ASTM D-1238 (MFI) of from about 0.20-0.60 g/10 min, and comprising a particle size distribution of less than about 50 μm;
- iii) a first post-consumer polyethylene resin, having a MFI of from about 0.10-0.70 g/10 min;
- iv) a second post-consumer polyethylene resin, which is HMW, and having a HLMI of from about 4-8 g/10 min;
- and
- v) a polyethylene antioxidant,
- wherein the antioxidant is pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, 3,5-bis(1,1-dimethylethyl-4-hydroxy-,2,2-bis[[3-[3,5-bis(1,1-dimethylethyl-4-hydroxyphenyl]-1-oxopropoxy]methyl]-1,3-propanediyl ester, or 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoic acid [3-[3-(3,5-ditert-butyl-4-hydroxphenyl)-1-oxopropoxyl-2,2-bis[[3-(3,5-ditert-butyl-4-hydroxyphenyl)-1-oxopropoxy]methyl]propyl]ester.
5 more elements
Dependencies are inferred from the claim text.