DICYCLOPENTADIENE COMPOUND-MODIFIED PHENOLIC RESIN PRODUCTION METHOD

摘要

The purpose of the present invention is to provide a dicyclopentadiene compound-modified phenolic resin production method, whereby, when a catalyst is used repeatedly in the method, it becomes possible to stabilize the properties and color of the resin and it also becomes possible to use the catalyst repeatedly a sufficient number of times. The present invention addresses the problem of providing: a dicyclopentadiene compound-modified phenolic resin production method for producing a dicyclopentadiene compound-modified phenolic resin by reacting a phenol compound with a dicyclopentadiene compound, wherein a fluorinated ion exchange resin, which is used as a catalyst in the production, is re-used as a catalyst for the reaction between the phenol compound and the dicyclopentadiene compound to produce the dicyclopentadiene compound-modified phenolic resin, said method being characterized in that the fluorinated ion exchange resin to be re-used is washed with an organic solvent and the washed fluorinated ion exchange resin is used at least once during the re-use of the fluorinated ion exchange resin; and a production method as mentioned above, which is employed for purifying the product and whereby it becomes possible to prevent the discoloration of the resin produced in the above-mentioned dicyclopentadiene compound-modified phenolic resin production. The dicyclopentadiene compound-modified phenolic resin produced by the production method according to the present invention has stable quality and high purity and is inexpensive.