Color reduction in polyethylene modified by radical initiation
US7825196B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Sep 28, 2009 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Sep 28, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2967
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyethylene modified by using radical initiators such as oxygen and peroxides sometimes has a yellow color which may be reduced or eliminated by incorporating additives such as polyethylene glycol, and/or neutralizing species such as alkali metal stearates, particularly calcium stearate, and zinc oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.