化学工程与技术  >> Vol. 4 No. 2 (March 2014)

工艺条件对制备改性脲醛树脂浆料中的甲醛含量的影响
The Influence of the Technological Conditions on Formaldehyde Content of Modified Urea-Formaldehyde Resin Slurry

DOI: 10.12677/HJCET.2014.42005, PDF, HTML, 下载: 2,278  浏览: 6,739  科研立项经费支持

作者: 李 敏, 陈 洲, 徐珊珊, 余宏鹏, 黄紫洋:福建师范大学化学与化工学院,福州

关键词: 脲醛树脂浆料羟甲基松香甲醛含量工艺条件Urea-Formaldehyde Resin (Ufr) Slurry; Hydroxymethyl Rosin; Free Formaldehyde Content; Technological Condition

摘要: 本实验采用羟甲基松香与脲醛共聚合,旨在减少脲醛树脂分子结构中可降解或分解生成甲醛的结构单元,从而有效地降低脲醛树脂浆料中甲醛的释放,制得低甲醛环保型改性脲醛树脂浆料。实验中对不同的酸性催化剂、碱性调节剂、甲醛/尿素投料比、硫脲的添加量等工艺条件下所制得的不同批次的脲醛树脂浆料中甲醛含量和固含量进行测定,筛选出最优工艺条件。实验所制得的脲醛树脂浆料为乳浊液,颜色呈淡黄色,固含量>40%,游离甲醛为1.09%pH6.8~7.2,固化时间超过30 d
Abstract: The urea-formaldehyde resin (UFR) slurry is prepared by the copolymerization of modified hydroxymethyl rosin with urea and formaldehyde. In order to reduce the release of free formaldehyde efficiently, the approaches of the degradation and decomposition of UFR structural unit of formaldehyde are constructed, and then the environmental friendly modified urea-formaldehyde resin slurry with low-formaldehyde content is obtained. In the experiment, the optimal technological conditions through the determination of formaldehyde content and solids content of different batches of UFR slurry are selected by the different conditions such as acid catalyst, basic containing agent, ratio of urea and formaldehyde, and additional content of thiourea. The title product UFR slurry presents emulsion, faint yellow, solids content over 40%, free formaldehyde content 1.09%, pH 6.8 - 7.2, and solidification time over 30 days.

文章引用: 李敏, 陈洲, 徐珊珊, 余宏鹏, 黄紫洋. 工艺条件对制备改性脲醛树脂浆料中的甲醛含量的影响[J]. 化学工程与技术, 2014, 4(2): 29-35. http://dx.doi.org/10.12677/HJCET.2014.42005

参考文献

[1] Scopelities, E. and Pizzi, A. (2003) Urea-Resorcinol-Formaldehyde Adhesives of Low Resorcinol Content. Journal of Applied Polymer Science, 48, 2135-2146.
[2] 黄活阳, 哈成勇, 李因文, 等 (2010) 有机硅改性松香基环氧树脂的制备及阻燃性能. 高分子材料科学与工程, 1, 147-150.
[3] 张玉龙 (2009) 水基胶粘剂. 化学工业出版社, 北京.
[4] 纪良, 张长武 (2009) 低毒脲醛树脂单元改性的研究现状与进展. 林业机械与木工设备, 7, 15-16.
[5] 马力宇 (2005) 改性脲醛树脂研究新进展.宁夏石油化工, 3, 6-9.
[6] 任天瑞, 李永红 (2005) 松香化学及其应用. 化学工业出版社, 北京.
[7] 王基夫, 林明涛, 王春鹏, 等 (2011) 可聚合松香增黏树脂的合成及其对压敏胶性能的影响. 中国胶粘剂, 8, 21.
[8] Deng, L.L., Shen, M.M., Yu, J., et al. (2012) Preparation, Characterization, and Flame Retardancy of Novel RosinBased Siloxane Epoxy Resins. Industry & Engineering Chemistry Research, 51, 8178-8184.
[9] 宋湛谦 (2002) 松香的精细化工利用(I)——松香的组成与性质. 林产化工通讯, 4, 29-33.
[10] 杨惟喜 (2012) 乙酰丙酮法检测皮革制品中甲醛含量的研究. 西部皮革, 20, 37-40.
[11] 林贤 (2004) 胶黏剂、涂料固体含量的测定方法探讨. 广东化工, 5, 13-14.