C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 69/54 (2006.01) B01J 3/00 (2006.01) C07C 67/08 (2006.01)
Patent
CA 2286398
The present invention relates to a process for preparing acrylate esters, methacrylate esters, polyester acrylates and/or polyester methacrylates by reacting acrylic and/or methacrylic acid with a monohydroxy containing compound and/or a polyhydroxy containing compound in a reaction vessel, in the presence of a catalyst, a polymerization inhibitor and dense phase carbon dioxide. The dense phase carbon dioxide is in either a sub-critical, near-critical, critical or supercritical physical state. Adva~ g . of using dense phase carbon dioxide as the solvent include the preparation of (meth)acrylate esters and polyester (meth)acrylates in an environmentally friendly manner by reducing or eliminating the need for hydrocarbon solvents, reducing or eliminating the problems associated with handling hydrocarbon solvents, simplifying recovery of products, and recovery and recycle of reactants as compared to the conventional esterification synthesis. In addition, the products produce by the process of this invention can have improved color and purity.
Smart & Biggar
Ucb S.a.
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