老美的专利摘要,请各位大大帮忙,不甚感激!? A method is provided for reducing the solvent content and increasing the sticking temperature of polyvinyl alcohol, which is prepared from the alcoholysis of polyvinyl acetate, charged to a dryer. The polyvinyl alcohol from the alcoholysis reaction, without prior vacuum drying at an elevated temperature , is slurried in a liquid mdium comprising methanol , methyl acetate , water and , optionally , a nonsolvent for polyvinyl alcohol.The slurry is heated to at least 60 ℃ for at least 5 minutes.The polyvinyl alcohol burnt particle count is reduced in the subsequent drying step and a product is afforded which has a reduced ash content and increased cold water solubility and low temperature solubility. 谷歌翻译: [size=100%][size=100%]一个方法是为降低溶剂含量,增加 聚乙烯醇 ,它是由聚 醋酸乙烯 醇收取烘干机,准备坚持的温度。 [size=100%]从聚乙烯醇醇解反应,恕不另行真空干燥在高架... 词霸翻译: 方法为减少溶解的内容和增加黏附的温度提供聚乙烯醇,从多 乙酸乙烯酯 醇解准备,被充电对烘干机。 从醇解反应的聚乙烯醇,没有在高的temperature,is的预先的真空干燥slurried在包括聚乙烯醇的一液体mdium methanol,methyl acetate,water and,optionally,a非溶剂。泥浆被加热对至少60℃至少5分钟。聚乙烯醇被烧的微粒计数在随后干燥步骤减少,并且有减少的灰含量的产品买得起和增加的冷水可溶性和低温可溶性。 实在看不懂了,各位大大。 查看更多1个回答 . 1人已关注