| 摘要 |
A method of manufacture of novolac-type phenol resin, wherein phenols and aldehydes are allowed to react with each other, a water-soluble organic phosphonic acid is used as a reaction catalyst, and a tertiary phosphine compound is used as a reaction promoter. It is preferable that the aforementioned organic phosphonic acid have the structure shown in the following general formula (1): R—PO(OH)2   (1) (R is a group which contains a carbon atom, and which contains —COON and/or —PO(OH)2). |
