Bio-based photo-curable prepolymer and preparation method thereof

The invention discloses a bio-based photo-curable prepolymer and a preparation method thereof. The prepolymer is prepared from 7-28 parts of diisocyanate, 4-32 parts of an acrylate monomer containinghydroxyl group, 8-24 parts of a polyol prepolymer, 30-70 parts of polylactic acid polyol, 1-5 parts of a polymerization inhibitor and 0.1-1 part of a catalyst. Through a large quantity of experiments,optimum raw material formula and ratio are screened out, and through a large quantity of experiments, the optimum synthesis process is selected. The whole preparation method has reasonable design. The bio-based photo-curable prepolymer not only has great hardness, flexibility and glossiness but also is high in curing speed; by means of a bio-based material, the product is good in energy-saving and environment-friendly performance and has excellent technical effects. 本发明公开了种生物基可光固化预聚物及其制备方法，它由二异氰酸酯7～28份、含羟基的丙烯酸酯单体4～32份、多元醇预聚物8～24份、聚乳酸多元醇30～70份、阻聚剂1～5份和催化剂0.1～1份制成。本发明通过大量实验筛选得到最佳的原料组成和配比，并通过大量实验优选出最佳的合成工艺，整个制备工艺设计合理，制备得