Synthesis and Properties of Polyurethane Water Solution
In response to the problem of poor stability of traditional polyurethane aqueous solutions,a modified starch was first prepared by treating starch with ultrasound.Then,a polyurethane aqueous solution was prepared using acetone method.Finally,a new modified starch/polyurethane aqueous solution was obtained by mixing the modified starch with the polyurethane aqueous solution.Determine the stability of modified starch/polyurethane aqueous solution using accelerated settling experiment.The results showed that when the ratio of isocyanate groups to hydroxyl substances in the solution is greater than or equal to 3,the molecular weight of polyethylene glycol is about 400,the neutralization degree is greater than 80%,and the solid content range is 35%to 40%,the stability of the solution is good.The newly developed materials have excellent performance and provide reference for the development of polyurethane field.
NETL
NSTL
万方数据
