Invention Grant
US07674854B2 Process for producing polyvinyl acetal resin, polyvinyl butyral resin, and process for producing esterified polyvinyl alcohol resin
有权
聚乙烯醇缩醛树脂的制造方法，聚乙烯醇缩丁醛树脂，以及生产酯化聚乙烯醇树脂的方法
- Patent Title: Process for producing polyvinyl acetal resin, polyvinyl butyral resin, and process for producing esterified polyvinyl alcohol resin
- Patent Title (中): 聚乙烯醇缩醛树脂的制造方法，聚乙烯醇缩丁醛树脂，以及生产酯化聚乙烯醇树脂的方法
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Application No.: US11659130Application Date: 2004-08-04
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Publication No.: US07674854B2Publication Date: 2010-03-09
- Inventor: Toshio Tada , Yohei Nishimura , Katsunori Toyoshima
- Applicant: Toshio Tada , Yohei Nishimura , Katsunori Toyoshima
- Applicant Address: JP Osaka
- Assignee: Sekisui Chemical Co., Ltd.
- Current Assignee: Sekisui Chemical Co., Ltd.
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- International Application: PCT/JP2004/011176 WO 20040804
- International Announcement: WO2006/013627 WO 20060209
- Main IPC: C08C2/04
- IPC: C08C2/04 ; C08F8/00
Abstract:
It is an object of the present invention to provide a method of producing a polyvinyl acetal resin by which a polyvinyl acetal resin having a high acetalization degree can be produced even in a solid catalyst system, a polyvinyl butyral resin produced by the above-mentioned production method of a polyvinyl acetal resin, and a method of producing an esterified polyvinyl alcohol resin by which the esterification can be performed at high efficiency even in a solid catalyst system.The present invention is a method of producing a polyvinyl acetal resin, wherein a solution or a suspension containing a polyvinyl alcohol resin and a carbonyl compound is pressurized in the presence of a solid catalyst.
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