Invention Grant
- Patent Title: Method of producing novolak resin
- Patent Title (中): 酚醛清漆树脂的制备方法
-
Application No.: US11037058Application Date: 2005-01-19
-
Publication No.: US07345132B2Publication Date: 2008-03-18
- 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 Hsinchu Industrial District
- Assignee: Chang Chun Plastics Co. Ltd
- Current Assignee: Chang Chun Plastics Co. Ltd
- Current Assignee Address: TW Hsinchu Industrial District
- Agency: Sughrue Mion, PLLC
- Priority: JP2000-377258 20001212; JP2000-377259 20001212; JP2001-153632 20010523
- Main IPC: C08G14/04
- IPC: 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
- US20050124778A1 Method of producing novolak resin Public/Granted day:2005-06-09
Information query
