磺酸盐聚酯二元醇型聚氨酯丙烯酸酯乳液的制备及其性能研究

Preparation and properties of polyester dialcohol sulfonate polyurethane acrylate emulsion

摘要:

以异佛尔酮二异氰酸酯(IPDI)、磺酸盐聚酯二元醇(BY3303)、1,4-丁二醇(BDO)、丙烯酸羟乙酯(HEA)为原料，IPDI首先与BY3303反应，经BDO扩链后得到预聚体，最后用HEA对其进行封端，得到磺酸型聚氨酯丙烯酸酯乳液(SWPUA)．研究结果表明：乳液的平均粒径为50～70 nm之间，随R值增大，拉伸强度逐渐上升，而断裂伸长率随之下降；随着亲水基团含量上升，拉伸强度逐渐下降，而断裂伸长率逐渐上升．采用2959作为光引发剂，其浓度为2%，当辐照光强为40 mW/cm2时，SWPUA胶膜具有最快的光固化速率和最高的固化程度．

Abstract:

Using isophorone diisocyanate （IPDI）， polyester dialcohol sulfonate （BY3303）， 1， 4-butanediol （BDO）， hydroxyethyl acrylate （HEA） as raw materials， IPDI first reacted with BY3303， and the prepolymer was obtained by BDO chain extension， and finally with HEA to seal the end. Sulfonate type polyurethane acrylate emulsion （SWPUA） was obtained. The results show that the average particle size of emulsion is between 50 nm and 70 nm. With the increase of R value， the tensile strength increases gradually， while the elongation at break decreases. With the increase of hydrophilic group content， the tensile strength decreases gradually， while the elongation at break increases gradually. Using 2959 as a photoinitiator with a concentration of 2%， SWPUA film has the fastest photocuring rate and the highest curing degree when the irradiation intensity is 40 mW /cm2.