High melt strength polymers and method of making same
US6875816B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2002 |
| Grant date | Apr 5, 2005 |
| Priority date | — |
| Expiry date | Apr 24, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polymer composition comprises: (a) a high molecular weight, branched component; and (b) a low molecular weight, branched component. Some polymer compositions are characterized by a substantial absent of amyl or methyl branches and a melt strength (MS) that satisfies the following relationship: where x is greater than or equal to about 12.5 and y is greater than or equal to about 3.Some polymers are characterized by a melt strength (MS) that satisfies the following relationship: where x is greater than or equal to about 3 and y is greater than or equal to about 4.5 and a molecular weight distribution of greater than 3. A process for making polymers is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.