Polyethylene glycol compounds and process of making
US7199193B2 · kind B2 · utility
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4References
15Claims
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Key dates
| Filing date | Sep 28, 2004 |
| Grant date | Apr 3, 2007 |
| Priority date | — |
| Expiry date | Jun 6, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for making substituted polyethylene glycol compound. The compound has the formula RO(C2H40)nH wherein R represents a C1–7 hydrocarbon group and n represents the average number of moles of C2H40 groups, ranging from 500 to 2000. The compound has a ratio of weight average molecular weight to a number average molecular weight in the range of from 1 to 1.1. The compound contains less than ten weight percent polyethylene glycol. The gist of the process is the use of a polyether solvent, wherein the n value of the compound ranges from 600 to 2000.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.