| 摘要 |
PURPOSE:To provide a desensitizer which improves its desensitizing effect by containing addition reaction product of modified rosin having rosin or carboxyl group and compound having glycidyl group. CONSTITUTION:A desensitizer containing a product produced by reacting modified rosin (A) having rosin or carboxyl group with compound (B) having glycidyl group additively and reacting the produt with compound (C) reacted with the glycidyl group except the compound (A) as required. The modified rosin includes preferably maleic acid resin, fumaric acid resin, etc. The compound having glycidyl group includes phenylglycidyl ether, polyethylene glycoldiglycidyl ether, polyepoxy compound, etc. |
