公开(公告)号：US5811488A

公开(公告)日：1998-09-22

申请号：US866392

申请日：1997-05-30

申请人： Naoto Narumoto ,  Takanori Kitamura ,  Yuji Takenouchi ,  Takanori Tsugiya ,  Hisamichi Yanai

发明人： Naoto Narumoto ,  Takanori Kitamura ,  Yuji Takenouchi ,  Takanori Tsugiya ,  Hisamichi Yanai

IPC分类号： C08F8/12 ,  C08J3/03 ,  C08J3/12 ,  C08J9/28 ,  C08L29/02 ,  C08L29/04 ,  C08F116/06

CPC分类号： C08J3/03 ,  C08F8/12 ,  C08J3/12 ,  C08J5/18 ,  C08J9/28 ,  C08J2201/05 ,  C08J2329/04

摘要： The present invention provides a polyvinyl alcohol powder which comprises a pore having an average diameter of 0.1 to 10 .mu.m in the range of 0.05 to 0.4 cc/g. Since the PVA powder of the present invention has an excellent solubility in water, an aqueous solution thereof can easily be prepared industrially.Since the PVA powder of the present invention has a low content of an organic volatile component and a low content of a nonvolatile component such as a carboxylic acid salt or the like which is derived from a basic catalyst, it has an excellent industrial handleability.

摘要翻译： 本发明提供一种聚乙烯醇粉末，其包含在0.05〜0.4cc / g范围内的平均直径为0.1〜10μm的孔。 由于本发明的PVA粉末在水中的溶解性优异，因此其水溶液可以容易地在工业上制备。 由于本发明的PVA粉末具有低含量的有机挥发性成分，并且含量低的来自碱性催化剂的羧酸盐等不挥发成分，因此具有优异的工业操作性。