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    • 37. 发明授权
    • Process for manufacturing thermosetting resin particles
    • 制备热固性树脂颗粒的方法
    • US5610269A
    • 1997-03-11
    • US574130
    • 1995-12-18
    • Haruhiko SatoYutaka Harada
    • Haruhiko SatoYutaka Harada
    • C08J3/16C08F6/18C08J3/14C08L1/00C08L29/04C08L71/00C08L71/02C08L101/00C08L101/14C09D5/03
    • C08F6/18C08J3/14C09D5/03
    • Thermosetting resin particles having a narrow particle size distribution useful for powder coating application are produced by the steps of (a) providing a first water-soluble polymer having a cloud point within the range between 30.degree. C. and 90.degree. C. and a second water-soluble polymer not having any cloud point; (b) preparing an aqueous suspension in which an organic solvent-containing, liquid thermosetting resin composition is suspended as primary particles of oil droplets in an aqueous suspension medium containing the first and second water-soluble polymers, (c) heating the suspension to a temperature higher than the cloudy point to allow the oil droplets to agglomerate into secondary particles of larger particle sizes, (d) removing the organic solvent contained in the particles during or after step (c) and optionally (e) recovering the particles.
    • 通过以下步骤制备具有用于粉末涂料应用的窄粒度分布的热固性树脂颗粒:(a)提供具有30℃至90℃范围内的浊点的第一水溶性聚合物, 不具有任何浊点的水溶性聚合物; (b)制备水性悬浮液,其中将含有机溶剂的液态热固性树脂组合物悬浮在含有第一和第二水溶性聚合物的水性悬浮介质中的油滴的初级颗粒,(c)将悬浮液加热至 温度高于混浊点以允许油滴聚集成较大颗粒尺寸的二次颗粒,(d)在步骤(c)期间或之后除去颗粒中包含的有机溶剂,任选地(e)回收颗粒。