专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

2. 发明授权

US5350799A Process for the conversion of fine superabsorbent polymer particles into larger particles 失效
标题翻译：将精细超吸收性聚合物颗粒转化成较大颗粒的方法
公开(公告)号：US5350799A
公开(公告)日：1994-09-27
申请号：US694445
申请日：1991-05-07
申请人： Guy T. Woodrum , Thomas H. Majette
发明人： Guy T. Woodrum , Thomas H. Majette
IPC分类号： B01J2/06 , C08J3/12 , C08J3/24 , C08F6/00 , C08B31/00
CPC分类号： C08J3/12 , C08J2300/14
摘要： This invention is a method for converting fine particles of superabsorbent polymers into larger particles. The invention is primarily directed to aqueous solution processes for preparing superabsorbent polymers. In such aqueous solution polymerization methods, the polymerization reaction product is a high viscosity gel which is dried and ground into particles. In this grinding step, a portion of the product is produced as undesired fine particles having poor absorbency and poor fabrication properties; i.e. they "gel block" and dust. According to the invention, fine superabsorbent polymer particles (up to about 3 parts) are mixed with the high viscosity reaction product gel (100 parts) containing about 20 parts by weight of superabsorbent polymer and water (5 parts per part of recycled particles) to form a mixture with improved rheological properties. The resulting mixture can be processed at a higher rate than a reaction product gel of equal solids content which results in a higher product yield and increased productivity.
摘要翻译：本发明是将超吸收性聚合物的微粒转化成更大的颗粒的方法。本发明主要涉及制备超吸收性聚合物的水溶液方法。在这种水溶液聚合方法中，聚合反应产物是高粘度凝胶，其被干燥并研磨成颗粒。在该研磨步骤中，产物的一部分被制成具有差的吸收性和差的制造性能的不良细颗粒; 即它们是“凝胶块”和灰尘。根据本发明，将精细的超吸收性聚合物颗粒（最多约3份）与含有约20重量份超吸收聚合物和水（每份5份循环颗粒）的高粘度反应产物凝胶（100份）混合至形成具有改善的流变性质的混合物。所得到的混合物可以以比相等固体含量的反应产物凝胶更高的速率进行处理，这导致较高的产物收率和提高的生产率。

IPRDB

热门服务

关于我们

友情链接

联系方式