健康·安全·环境
第45卷第12期 2015年12月
涂料工业
PAINTCOATINGSINDUSTRY
双组分桐油基水性丙烯酸聚氨酯木器清漆的制备及性能研究
麻文杰，夏勇，周尽花，孙汉洲，（经济林培育与保护省部共建教育部重点实验室中南林业科技大学，长沙410004）
Vol.45No.12 Dee.2015
摘要：研究了水性固化剂种类及R值[n(一NCO）:n(一OH)]对双组分桐油基水性丙烯酸聚氨酯木器漆涂膜性能的影响，采用红外光谱仪、热重分析仪、示差扫描量热仪等对漆膜的结构及性能进行了表征和测试。结果表明：选用Bayhydur305为适宜的水性固化剂，R值为1.5.提高了树脂的耐热性，第2个最大速率分解温度提高了49.3℃，玻璃化温度提高了近20℃，漆膜的基本性能均能达到一级应用要求。
关键词：桐油基；水性丙烯酸：聚氨酯：木器清漆中图分类号：TQ635.3
文献标识码：A文章编号：0253-4312（2015)12-0038-06
Preparation and Properties of 2K Tung Oil-Based Waterborne Acrylic Polyurethane Wood Varnish
Ma Wenjie,Xia Yong,Zhou Jinhua,Sun Hanzhou
(Key Laboratory of Culriuation and Protection or Non-Wood Forest Trees,Central
South Unirersity of Forestry and Technology, Ministry of Education, Changsha 410004, China)
Abstract:The effects of waterborme curing agent and themole ratio of-NCO and -OH on the properties of the cured film derived from 2K tung oil-based waterbome acrylic polyurethane wood varnish were studied. The structure and properties of the film was characterized by infrared spectroscopy, themal gravimetric analysis and differential scanning calorimeter, etc. The results showed that Bayhydur 305 was the proper waterbome curing agent,-NCO and -OH mole ratio was 1. 5, the heat resistance of the resulted film was improved, the second decomposition tempera-ture was increased by 49. 3 C and the glass transition temperature was increased by approx, 20 C Meanwhile, the basic properties of the film lived up to the level 1 application demand.
Key Words:tung oil-based; waterborne acrylic; polyurethane; wood varnish
木质基材是一种具有亲水膨缩性的多孔纤维材料，其在木质地板、家具及内墙装饰等领域有着广泛的应用)。为了保持原木美观的同时改善木质基材的表面性能，人们常采用清漆对木质基材的表面进行
【基金项目国家科技部林业公益性行业科研专项（201304603）
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装饰保护（2]。在木器涂料行业，溶剂型涂料凭借其优异综合性能一直占据着主导地位。但其在成膜过程中会释放大量VOC，对人体和环境造成很大的危害及造成能源浪费(3-5)，使其应用范围受到限制。