Synthesis and film-forming performance of novel polyurethane aqueous dispersions

XU Xue; ZHONG Shangfu; ZHU Yan'an; QU Jinqing

doi:10.11949/j.issn.0438-1157.20151719

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Synthesis and film-forming performance of novel polyurethane aqueous dispersions

更新时间：2025-12-10

- Synthesis and film-forming performance of novel polyurethane aqueous dispersions
- CIESC Journal Issue 5, Pages: 2124-2130(2016)
- 作者机构：
  
  1. 华南理工大学化学与化工学院,广东,广州,510640
  2. 嘉宝莉化工集团股份公司,广东,江门,529085
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20151719
  CLC： Q630.4
- Online First：05 May 2016，
  
  Published：05 May 2016
- 稿件说明：
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XU Xue, ZHONG Shangfu, ZHU Yan'an, et al. Synthesis and film-forming performance of novel polyurethane aqueous dispersions[J]. CIESC Journal, 2016, (5): 2124-2130.
DOI：

XU Xue, ZHONG Shangfu, ZHU Yan'an, et al. Synthesis and film-forming performance of novel polyurethane aqueous dispersions[J]. CIESC Journal, 2016, (5): 2124-2130. DOI： 10.11949/j.issn.0438-1157.20151719.

摘要

合成了新型扩链剂三羟甲基丙烷月桂酸单酯(TMPLA)并制备聚氨酯水分散体(n-PUD)

取代小分子成膜助剂辅助高玻璃化温度(Tg)聚丙烯酸酯乳液(PA)成膜

以制备高性能超低挥发性有机化合物(VOC)含量水性木器涂料。研究了软/硬段质量比、NCO/OH及TMPLA/BDO摩尔比对n-PUD助成膜性能的影响。结果表明:随软/硬段质量比和NCO/OH摩尔比降低

PUD的助成膜能力增强;TMPLA引入能显著提高n-PUD的助成膜能力

优选TMPLA/BDO摩尔比4/2

NCO/OH摩尔比1.3

软/硬段质量比55/45时

n-PUD/PA按质量比25/75复配乳液在不加成膜助剂条件下能够在5℃形成连续透明成膜

制备的水性木器涂料VOC含量低至30 g·L-1。

Abstract

The novel diol chain-extender trimethylol propane monolaurate (TMPLA) was synthesized to prepare novel polyurethane aqueous dispersions (n-PUD)

which was used as a coalescent to assist the film forming of high Tg polyacrylate emulsion. Effects of NCO/OH molar ratio

soft/hard segment contents and molar ratio of TMPLA/BDO on assistant-film-forming performance of n-PUD were studied. It was found that the assistant-film-forming ability of PUD was increased with decreasing of NCO/OH molar ratio and hard segment proportions. PUDs modified with TMPLA displayed good assistant-film-forming ability. The optimized conditions to prepare assistant-film-forming n-PUD were as follows: molar ratios of TMPLA/BDO and NCO/OH were 4/2 and 1.3

respectively

mass ratio of soft/hard segment was 55/45

and then the blended latex with m(PUD)/m(PA) 25/75 can form a continuous transparent film at 5℃ without coalescent with a VOC content as low as 30 g·L-1.

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