Polyolefin
US6265513A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1998 |
| Grant date | Jul 24, 2001 |
| Priority date | — |
| Expiry date | Dec 18, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyolefin wherein PA1 A) the melt indices of Fractions 1, 4 and 6 of the polyolefin do not vary by more than 20% relative to the mean of Fractions 1, 4 and 6; and/or PA1 B) the percent crystallinity of Fractions 1, 4 and 6 of the polyolefin do not vary by more than 6% relative to the mean of Fractions 1, 4 and 6; and/or PA1 C) the Mw/Mn of Fractions 1, 4 and 6 of the polyolefin do not vary by more than 20% relative to the mean of Fractions 1, 4 and 6; and/or PA1 D) Fraction 1 has an aspect ratio of 0.5-1.5, fraction 4 has an aspect ratio of 1.2 to 4, Fraction 6 has an aspect ratio of about 1.75 to 5 provided that the aspect ratios of the Fractions differ by at least 0.3; PA1 E) and/or the Mw/Mn of the polyolefin is 10 or more; and wherein Fractions 1, 4 and 6 are obtained by using the following sieves: Sieve size Fraction Collected Fraction Name 10 mesh >2000 .mu.m Fraction 1 18 mesh 2000-1000 .mu.m Fraction 2 35 mesh <1000-500 .mu.m Fraction 3 60 mesh <500-250 .mu.m Fraction 4 120 mesh <250-125 .mu.m Fraction 5 pan <125 .mu.m Fraction 6.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.