Preparing method of methoxypolyethyleneglycol and its derivatives
US7781563B2 · kind B2 · utility
2Cited by
2References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 3, 2006 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Feb 14, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/30
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a preparing method of methoxypolyethyleneglycol (mPEG) with high purity and derivatives thereof. More precisely, the method of the present invention to prepare high purity mPEG with at least 99% of purity, up to 1.05 of molecular weight distribution and 350˜100,000 of molecular weight includes the process of reacting commercial mPEG having low purity to give highly purified intermediates, mPEG-acetic acid of formula 1 and mPEG-phthalate of formula 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.