利用玉米淀粉的酯化制造API胶粘剂研究

对利用酯化玉米淀粉,制造水性高分子-异氰酸酯胶粘剂(API)的配方进行了系统的研究.将玉米淀粉酯化处理成乳液,在一定酸碱度条件下,与无毒、无公害的合成橡胶胶乳共聚制成API胶的主剂;将多异氰酸酯化合物的异氰酸酯基封闭处理后,作为API胶的固化剂,由此制成双组分无醛耐水API胶.生产性试验表明,用此API胶压制的三层实木复合地板、机拼细木工板、胶合板及集成材等胶合制品,其理化性能指标完全达到有关标准要求,并且制品无甲醛等有毒物质挥发.此种胶粘剂具有明显的生产可操作性,完全满足现有的工艺要求,其原料成本为同类进口胶粘剂的50%左右,具有明显的社会环境效益和经济效益.

On Aqneous Polymer-Isocyanate Adhesive by Esterfying Corn Starch

The technology for the manufacture of aqueous polymer-isocyanate(API) adhesive by esterfying corn starch was studied. Corn starch was firstly esterfied at a certain pH to form a emulsion that was condensed with synthetic rubber latex to yield the main component of API. This component was mixed with isocyanate as a cross-linking agent to form adhesive system API that was used as the adhesive of three-layer composite flooring board,blockboard, plywood, laminated stuff and other bond products. After production trail, performance of all products mentioned above reached the requirement of the national standard. There are no poison materials released from the products. API is an applicable, easily handled adhesive and meets the need of present technology. Its cost is half of the similar import adhesive. It has remarkable social and environmental benefits and economic profits.