Monitoring diffusion and reaction rate during film formation of waterborne 2-pack polyurethane coatings

监测水性两件装聚氨酯涂料成膜过程中的扩散和反应速率

基本信息

  • 批准号:
    522222-2017
  • 负责人:
  • 金额:
    $ 11.07万
  • 依托单位:
  • 依托单位国家:
    加拿大
  • 项目类别:
    Collaborative Research and Development Grants
  • 财政年份:
    2020
  • 资助国家:
    加拿大
  • 起止时间:
    2020-01-01 至 2021-12-31
  • 项目状态:
    已结题

项目摘要

Concern for the environment has been driving major changes in technology in the coatings industry. To reduce the amount of volatile organic compounds (VOC's) released to the atmosphere, new technology is being developed to replace solvent-based coatings with water-based coatings. The biggest challenges have been in industrial coatings, where polyurethane coatings play a particularly important role, for example in automotive, aerospace, industrial maintenance, and plastic coatings applications. The highest performing polyurethane (PUR) coatings involve "2-pack" (2K) solvent-based formulations in which a polyisocyanate (PIC) and a low molecular weight polyol are packaged separately to avoid the intrinsic reaction of the components. The two components are mixed just prior to use and then they have to be applied to a substrate before the reaction between the components becomes too advanced (the "pot life"). Waterborne (WB) 2K-PUR coatings have been developed as an environmentally friendly alternative to solvent-based polyurethanes, but this technology is much more complex. First, the polyisocyanates have to be dispersed in water, where reaction between the PIC and water can occur in competition with the reaction with the polyol. In addition, the polyol is present as small particles rather than discreet molecules. This has a major effect on the way the PIC and polyol react. While attempts have been made to study reaction rates in WB 2K-PUR systems, almost nothing is known about how the components mix at the molecular level, and how this affects the final performance properties of the coating. In this project, we will use special techniques developed by the Winnik group at the University of Toronto to study the rates at which the polymers in the PIC and in the polyol mix and how this compares to the rates at which the chemical reactions occurs. We will study these processes for a wide range of polyol compositions, and we will work with our partners at BASF to translate this fundamental knowledge into the design of high performing WB 2K-PUR coatings.
对环境的关注一直在推动涂料行业技术的重大变革。为了减少释放到大气中的挥发性有机化合物(VOC)的量,正在开发新技术以用水基涂料取代溶剂型涂料。最大的挑战是在工业涂料中,聚氨酯涂料在其中发挥着特别重要的作用,例如在汽车,航空航天,工业维护和塑料涂料应用中。性能最高的聚氨酯(PUR)涂料涉及“双组分”(2K)溶剂型配方,其中多异氰酸酯(PIC)和低分子量多元醇单独包装,以避免组分之间的固有反应。这两种组分在使用前混合,然后必须在组分之间的反应变得太快(“适用期”)之前将它们施加到基材上。水性(WB)2K-PUR涂料已被开发作为溶剂型聚氨酯的环保替代品,但这项技术要复杂得多。首先,多异氰酸酯必须分散在水中,其中PIC和水之间的反应可以与与多元醇的反应竞争发生。此外,多元醇作为小颗粒而不是离散分子存在。这对PIC和多元醇的反应方式有重大影响。虽然已经尝试研究WB 2K-PUR系统中的反应速率,但几乎不知道组分如何在分子水平上混合,以及这如何影响涂层的最终性能。在这个项目中,我们将使用由多伦多大学Winnik小组开发的特殊技术来研究PIC和多元醇中聚合物混合的速率,以及如何将其与化学反应发生的速率进行比较。我们将研究各种多元醇组合物的这些工艺,并将与巴斯夫的合作伙伴合作,将这些基础知识转化为高性能WB 2K-PUR涂料的设计。

项目成果

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会议论文数量(0)
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Winnik, Mitchell其他文献

Winnik, Mitchell的其他文献

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{{ truncateString('Winnik, Mitchell', 18)}}的其他基金

Monitoring diffusion and reaction rate during film formation of waterborne 2-pack polyurethane coatings
监测水性两件装聚氨酯涂料成膜过程中的扩散和反应速率
  • 批准号:
    522222-2017
  • 财政年份:
    2021
  • 资助金额:
    $ 11.07万
  • 项目类别:
    Collaborative Research and Development Grants
Polymer Conformation, Dynamics, Morphology
聚合物构象、动力学、形态
  • 批准号:
    RGPIN-2017-03741
  • 财政年份:
    2021
  • 资助金额:
    $ 11.07万
  • 项目类别:
    Discovery Grants Program - Individual
Next generation reagents for mass cytometry and imaging mass cytometry
用于质谱流式分析和成像质谱流式分析的下一代试剂
  • 批准号:
    566946-2021
  • 财政年份:
    2021
  • 资助金额:
    $ 11.07万
  • 项目类别:
    Alliance Grants
High-throughput serological assay for detection of cytokines/chemokines in COVID-19 patients
用于检测 COVID-19 患者细胞因子/趋化因子的高通量血清学检测
  • 批准号:
    555017-2020
  • 财政年份:
    2020
  • 资助金额:
    $ 11.07万
  • 项目类别:
    Alliance Grants
Polymer Conformation, Dynamics, Morphology
聚合物构象、动力学、形态
  • 批准号:
    RGPIN-2017-03741
  • 财政年份:
    2020
  • 资助金额:
    $ 11.07万
  • 项目类别:
    Discovery Grants Program - Individual
High sensitivity reagents for bioassays employing mass cytometry
用于采用质谱流式细胞仪进行生物测定的高灵敏度试剂
  • 批准号:
    484832-2015
  • 财政年份:
    2019
  • 资助金额:
    $ 11.07万
  • 项目类别:
    Collaborative Research and Development Grants
Monitoring diffusion and reaction rate during film formation of waterborne 2-pack polyurethane coatings
监测水性两件装聚氨酯涂料成膜过程中的扩散和反应速率
  • 批准号:
    522222-2017
  • 财政年份:
    2019
  • 资助金额:
    $ 11.07万
  • 项目类别:
    Collaborative Research and Development Grants
Polymer Conformation, Dynamics, Morphology
聚合物构象、动力学、形态
  • 批准号:
    RGPIN-2017-03741
  • 财政年份:
    2019
  • 资助金额:
    $ 11.07万
  • 项目类别:
    Discovery Grants Program - Individual
Monitoring diffusion and reaction rate during film formation of waterborne 2-pack polyurethane coatings
监测水性两件装聚氨酯涂料成膜过程中的扩散和反应速率
  • 批准号:
    522222-2017
  • 财政年份:
    2018
  • 资助金额:
    $ 11.07万
  • 项目类别:
    Collaborative Research and Development Grants
Polymer Conformation, Dynamics, Morphology
聚合物构象、动力学、形态
  • 批准号:
    RGPIN-2017-03741
  • 财政年份:
    2018
  • 资助金额:
    $ 11.07万
  • 项目类别:
    Discovery Grants Program - Individual

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