Blends of ethylenic polymers with improved modulus and melt strength and articles fabricated from these blends
US6723793B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2003 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | Jan 24, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2207/07
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A blend which comprises;A) a heterogeneous or homogenous linear ethylene homopolymer or interpolymer;B) a branched homopolymer or interpolymer;wherein said blend has;1) a melt index, I2, of about 0.05 to about 20 g/10 min;2) a flexural modulus of ≧100,000 psi or ≦30,000 psi;3) a melt strength of ≧2 cN;4) a melt extensibility of ≧25 mm/sec; and5) wherein said melt strength of said blend meets the following relationship;Melt strength≧FMS*[(f*A)+((1−f)*B)];where:A=3.3814*(I2)−06476 and B=16.882*(I2)−06564; whereI2 is the measured melt index of the blend; f is the weight fraction of the linear polyethylene in the blend and FMS is ≧1.1.Also included in the present invention are foams, films, fibers, blow molded articles, wire and cable articles and extrusion coatings comprising said blend.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.