| 摘要 |
PROBLEM TO BE SOLVED: To obtain a resin composition which can give a cured product having improved water-resistant strength by incorporating an amino resin with resorcinol. SOLUTION: 100 pts.wt. (in terms of the solid matter) amino resin obtained by reacting an amino compound such as urea, thiourea, melamine, benzoguanamine, or dicyandiamide with an aldehyde such as formaldehyde is incorporated with 0.05-20.0 pts.wt., desirably, 0.1-10.0 pts.wt., most desirably, 0.5-4.0 pts.wt. resorcinol, and, optionally, a water repellent, a flame retardant, an insect repellent, an antiseptic, etc., to obtain a resin composition which can satisfy the JAS Class I Standard for testing the water resistance of an ordinary plywood when used as an adhesive for forming a plywood, an overlaid plywood, a laminated lumber, a woody fiber board, or the like, can develop prominent water-resistant strength without any alteration of a conventional production line of an amino resin, and enables the use of an amino resin in a more extensive use.
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