Low odor and volatiles polyolefin compositions and methods of production
US11773235B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2021 |
| Grant date | Oct 3, 2023 |
| Priority date | — |
| Expiry date | Dec 10, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2207/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are compositions comprising at least one polyolefin, a hindered phenol, and a phenyl phosphite; wherein the overall concentration of the hindered phenol and phenyl phosphite is within a range from 10 ppm to 5000 ppm in the polyolefin, and wherein the amount of the hindered phenol is less than the phenyl phosphite. Also disclosed herein are compositions comprising at least one polypropylene, a neutralizer, a hindered phenol, and a phenyl phosphite; wherein the overall concentration of the hindered phenol and phenyl phosphite is within a range from 1000 ppm to 5000 ppm in the polyolefin, and wherein the amount of the hindered phenol is from 200 to 2000 ppm less than the phenyl phosphite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.