胶合板用无醛水性热熔胶的合成与性能研究  

Synthesis and Properties of Aldehyde-free Water-based Hot Melt Adhesive for Plywood

作　　者：程凡 刘颖 吕奇洪 杨亮庆 Cheng Fan;Liu Ying;Lu Qihong;Yang Liangqing(Nature Home(China)Co.Ltd.,Foshan 528300,Guangdong,China)

机构地区：[1]大自然家居(中国)有限公司,广东佛山528300

出　　处：《中国人造板》2025年第1期21-26,共6页China Wood-Based Panels

基　　金：智能装卸板多层热压机关键技术研发与应用(项目编号2022TSGC2471)。

摘　　要：以甲苯二异氰酸酯(TDI)、异佛尔酮二异氰酸酯(IPDI)、聚己二酸-1,4-丁二醇酯(PBA)、聚环氧丙烷醚三醇(PPO)为主要单体,乙二胺基乙磺酸钠(AAS-Na)为磺酸基单体,1,4-丁二醇(BDO)为扩链剂合成了聚氨酯预聚体,并进一步采用乳化乙烯-丙烯酸(EAA)水性乳液和聚亚甲基苯基异氰酸酯(PMDI)进行改性制备了胶合板用水性热熔胶。通过对胶黏剂的不同异氰酸根指数(R值)、AAS-Na含量、PPO含量、EAA乳液加入比例和PMDI用量进行研究,最终确定了当R值为1.2,AAS-Na占预聚体质量分数为3%,PPO占预聚体质量分数为3%,EAA乳液加入比例为30%,PMDI加入比例10%,胶黏剂综合性能最好,采用该胶黏剂制备的胶合板性能达到了GB/T 9846—2015《普通胶合板》中I类胶合板要求,甲醛释放量为0.012 mg/m^(3),达到ENF级要求。Polyurethane prepolymers were synthesized with toluene diisocyanate(TDI),isophorone diisocyanate(IPDI),poly1,4-butanediol adipate(PBA),polypropylene oxideethertriol(PPO)asmain monomers,sodium ethylenediamine ethanesulfonate(AAS-Na) as sulfonic acid monomer,and 1,4-butanediol as chain extender.The water-based hot melt adhesive for plywood was prepared by emulsifying ethylene-acrylic acid(EAA)aqueous emulsion and modifying Polymethylene phenyl isocyanate(PMDI).By studying the different isocyanate root index(R value),AAS-Na content,PPO content,EAA emulsion addition ratio and PMDI dosage of adhesives,it was determined that when R value was 1.2,AAS-Na accounted for 3%of prepolymer mass fraction,PPO accounted for 3%of prepolymer mass fraction,and EAA emulsion addition ratio was 30%.When PMDI was added to 10%,the adhesive had the better comprehensive performance,and the plywood prepared with this adhesive met the requirements of Class I plywood in GB/T 9846-2015 Plywood for general use,and the formaldehyde emission was 0.012 mg/m^(3) which met the requirements of ENF level.

关 键 词：胶合板 水性热熔胶 EAA水性乳液 ENF级 I类胶合板 

分 类 号：TQ437.9[化学工程]