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磺酸/羧酸型水性聚氨酯分散体粒径的影响因素 被引量:6

Factors affecting the particle size of waterborne polyurethanes containing sulfonic/carboxylic groups
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摘要 以磺酸型聚酯多元醇、甲苯二异氰酸酯(TDI)、异佛尔酮二异氰酸酯(IPDI)、1,4-丁二醇(BDO)及二羟甲基丙酸(DMPA)为原料制备水性聚氨酯,讨论了初始R值(n(—NCO)/n(—OH))、DMPA含量、二异氰酸酯种类、预聚体—NCO含量对水性聚氨酯分散体粒径的影响。结果表明,同样的初始R值下,用IPDI与TDI合成的水性聚氨酯分散体粒径差别不大;当—NCO质量分数在1.40%~2.78%之间、初始R值小于6、DMPA质量分数为2.00%时,所合成的水性聚氨酯分散体粒径较小(24.5~63.2 nm)且稳定性最好。 A series of waterborne polyurethanes( WPU) based on sulfonic acid polyester polyols,toluene diisocyanate( TDI) or 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate( IPDI),1,4-butanediol and dimethylolpropionic acid( DMPA) have been prepared. The influence of the diisocyanate precursor,residual NCO content,the initial value of R( n( —NCO) / n( —OH)),and DMPA content on the particle size of the waterborne polyurethanes are discussed in detail. The results indicate that the particle sizes of WPUs with the same R value are similar for TDI and IPDI. When the mass fraction of residual NCO was 1. 40%- 2. 78%,the initial value of R was less than 6 and DMPA had a mass fraction of 2. 00%,the resulting WPU had a small particle size( 24. 5- 63. 2 nm)and good stability.
出处 《北京化工大学学报(自然科学版)》 CAS CSCD 北大核心 2015年第3期62-66,共5页 Journal of Beijing University of Chemical Technology(Natural Science Edition)
基金 新疆维吾尔自治区科技计划项目(201315104)
关键词 磺酸/羧酸型 水性聚氨酯 粒径 影响因素 sulfonic / carboxylic groups waterborne polyurethane particle size influence factor
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参考文献3

  • 1Jianrong Xia,Ying Xu,Cuiran Gong,Dongshou Gao.Design strategy for waterborne polyurethane with sodium sulfonate groups on the soft segments[J]. J. Appl. Polym. Sci. . 2014 (1)
  • 2Lina He,Dongcheng Sun.Synthesis of high‐solid content sulfonate‐type polyurethane dispersion by pellet process[J]. J. Appl. Polym. Sci. . 2012 (4)
  • 3Michel Tielemans,Patrice Roose.Study of the rheology of aqueous radiation curable polyurethane dispersions modified with associative thickeners[J]. Progress in Organic Coatings . 2008 (2)

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