Propylene-alpha-olefin polymers, hot melt adhesive compositions that include propylene-alpha-olefin polymers and articles that include the same
US8614271B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2012 |
| Grant date | Dec 24, 2013 |
| Priority date | — |
| Expiry date | Jun 21, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/03
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A propylene-alpha-olefin polymer that includes at least 50% by weight propylene, has a ratio of z average molecular weight (Mz) to number average molecular weight (Mw) (Mz/Mw) from greater than 20 to no greater than 50, and a ratio of Mz to weight average molecular weight (Mw) (Mz/Mw) of greater than 2.5, and exhibits a viscosity of no greater than 2,500 centipoise at 190° C., and a hot melt adhesive composition that includes the propylene-alpha-olefin polymer, a first wax consisting of a functionalized wax, and a second wax different from the first wax, the adhesive composition exhibiting a viscosity of no greater than 2,500 centipoise at 177° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.