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首页> 外文期刊>Journal of coatings technology and research >Automated parallel polyurethane dispersion synthesis and characterization
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Automated parallel polyurethane dispersion synthesis and characterization

机译：自动平行聚氨酯分散体合成与表征

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摘要

The synthesis of waterborne polyurethane dispersions (PUDs) using an automated parallel reactor system was explored. Waterborne PUDs are an important class of polymer dispersion that can be used in many applications such as coatings for wood finishing, glass fiber sizing, adhesives, automotive topcoats, and other applications. Herein, we present the synthesis of aqueous PUDs using a Chemspeed Autoplant A100™ automated parallel reactor system. This is the first time a PUD has been synthesized using an automated parallel reactor system. The synthesis involves the formation of an isocyanate-terminated prepolymer followed by neutralization, dispersion in water, and chain extension. Details of the methodology are discussed with respect to the process of writing the program for the synthesis to synthesizing the PUD itself with the Chemspeed. It is demonstrated that an aqueous PUD can be synthesized with an automated parallel process and the unit-to-unit results are similar. Process variables such as agitator design, rate of neutralization, and rate of water dispersion are varied as these are the three major factors which lead to the desired end product property. The controlled addition of neutralizer, water, and chain extender is an added advantage with this automated technique and gave consistent results in all the units. The PUDs wererncharacterized for their particle size, viscosity, and percent solids.
机译：探索了使用自动平行反应器系统合成水性聚氨酯分散体（PUD）。水性PUD是一类重要的聚合物分散体，可用于许多应用中，例如木器涂料，玻璃纤维上浆剂，粘合剂，汽车面漆和其他应用。本文中，我们介绍了使用Chemspeed Autoplant A100™自动并行反应器系统合成水性PUD的方法。这是首次使用自动并行反应器系统合成PUD。合成过程包括形成异氰酸酯封端的预聚物，然后进行中和，在水中分散和扩链。关于编写用于合成程序，以Chemspeed合成PUD本身的程序的过程，对方法的细节进行了讨论。结果表明，水性PUD可以通过自动化的并行过程进行合成，并且单元间的结果相似。诸如搅拌器设计，中和速率和水分散速率之类的工艺变量是变化的，因为这是导致所需最终产品性能的三个主要因素。受控添加中和剂，水和扩链剂是该自动化技术的另一个优势，并且在所有单元中均提供了一致的结果。对PUD的粒径，粘度和固体百分比进行了表征。

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