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ESTER DE COLOPHANE DE COULEUR CLAIRE ET COMPOSITIONS D'ESTER DE COLOPHANE
ESTER DE COLOPHANE DE COULEUR CLAIRE ET COMPOSITIONS D'ESTER DE COLOPHANE
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摘要
A three-step method to prepare a light-colored rosin ester is disclosed wherein at least in one of the steps (a) and (c) a co-catalyst is applied and wherein at least in one of the steps (a) and (c) a disproportionation catalyst is applied. In the second step, a distilled rosin is obtained which is esterified with a polyol into a light-colored rosin ester. In one embodiment, the co-catalyst has a triplet formation quantum yield (φ
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