Invention Grant
- Patent Title: Method of producing novolak resin
- Patent Title (中): 酚醛清漆树脂的制备方法
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Application No.: US10000364Application Date: 2001-12-04
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Publication No.: US06936680B2Publication Date: 2005-08-30
- Inventor: Noriaki Saito , Ichishi Aizu , Nobuyuki Nakajima , Masahiro Fujiwara , Koji Yano
- Applicant: Noriaki Saito , Ichishi Aizu , Nobuyuki Nakajima , Masahiro Fujiwara , Koji Yano
- Applicant Address: TW
- Assignee: Chang Chun Plastics Co., Ltd.
- Current Assignee: Chang Chun Plastics Co., Ltd.
- Current Assignee Address: TW
- Agency: Sughrue Mion, PLLC
- Priority: JP2000-377258 20001212; JP2000-377259 20001212; JP2001-153632 20010523
- Main IPC: C08G8/10
- IPC: C08G8/10 ; C08G8/12 ; C08G14/04
Abstract:
Provided an industrially excellent method of producing a phenol novolak resin having an ortho ratio of 30% or more by: (1) a method of reacting a phenol and an aldehyde using an oxalic acid catalyst at 110 to 160° C. under pressure; or (2) a method of reacting a phenol and an aldehyde under pressure while removing the heat of reaction by a condenser with controlling a pressure so that water or an organic solvent present in the reaction system is refluxed.
Public/Granted literature
- US20020091224A1 Method of producing novolak resin Public/Granted day:2002-07-11
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