Acrylated maleic-modified rosin esters and methods of preparing same
US6583263B2 · kind B2 · utility
7Cited by
3References
16Claims
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Key dates
| Filing date | Jan 5, 2001 |
| Grant date | Jun 24, 2003 |
| Priority date | — |
| Expiry date | Feb 21, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09F1/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A two-step method for introducing acrylic functions into high molecular weight natural resins, under mild conditions, without the risk of gellation, wherein an acrylated natural resin ester is prepared by esterifying one or more of the sterically hindered hydroxy groups of the natural resin ester in an inert solvent with a 3-halopropionic acid, to form a 3-halopropionate ester of the natural resin ester and dehydrohalogenated the 3-halopropionate ester by reacting it with an organic base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.