摘要
以生物质来源的五亚甲基二异氰酸酯为研究对象,采用三环戊基膦催化剂合成了含有脲二酮结构的低黏化聚异氰酸酯组合物。进一步采用非离子改性法对该组合物进行亲水改性,制备水可分散型生物基聚异氰酸酯固化剂。考察合成温度、催化剂用量、亲水改性等工艺对固化剂外观、黏度、水分散性的影响,并使用凝胶渗透色谱仪表征固化剂的结构特征。结果表明,成功制备含脲二酮结构的生物基PDI固化剂,具有水分散佳、光泽高、硬度大、附着力强、柔韧性好等优点。
Using pentamethylene diisocyanate from biomass as the research object,a low viscosity polyisocyanate composition containing ureadione is synthesized by tricyclopentylphosphine catalyst.The composition was further modified hydrophilically by non-ionic modification method,thus an aqueous dispersible bio-based polyisocyanate curing agent is prepared.The effects of synthesis temperature,catalyst dosage and hydrophilic modification on the appearance,viscosity and aqueous dispersibility of the curing agent are investigated.The structural characteristics of the curing agent are characterized by gel permeation chromatograph.The results show that the bio-based PDI curing agent containing ureadione has the advantages of good aqueous dispersibility,high gloss,high hardness,strong adhesion and good flexibility.
作者
汪辉辉
曹亚成
史立平
刘睿
王亚鑫
饶兴兴
谭伟民
Wang Huihui;Cao Yacheng;Shi Liping;Liu Rui;Wang Yaxin;Rao Xingxing;Tan Weimin(CNOOC Changzhou Paint and Coatings Industry Research Institute Co.,Ltd.,Changzhou,Jiangsu 213016,China)
出处
《涂层与防护》
2023年第12期56-60,共5页
Coating and Protection
基金
常州市科技支撑计划(CE20220047)。
关键词
生物基
五亚甲基二异氰酸酯
异氰酸酯固化剂
水性聚氨酯
biological base
pentamethylene diisocyanate
isocyanate curing agent
waterborne polyurethane
