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US 6,583,263 B2Granted
Acrylated maleic-modified rosin esters and methods of preparing same
AssigneeSun Chemical Corporation
InventorKai-Uwe Gaudl
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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.
Claims16
A method for preparing an acrylated natural resin ester comprising:
- A:
- esterifying one or more sterically hindered hydroxy groups of a natural resin ester, with 3-halopropionic acid at an esterification temperature of about 100 C or more to form a 3-halopropionate ester of the natural resin ester;
- B:
- reacting the 3-halopropionate ester with an organic base at a second reaction temperature of about 100 C or less to form the acrylated natural resin ester.
1 more element
Dependencies are inferred from the claim text.