| 摘要 |
PURPOSE:To provide the titled adhesive composed of the pirncipal ingredient obtained by adding specific amounts of plural kinds of nonionic surface active agents to a composition of a synthetic rubber latex, etc. and PVA, and a crosslinking agent comprising an isocyanate compound, and capable of giving a highly stable adhesive solution, and of maintaining its adhesivity even after being left in a stacked state. CONSTITUTION:The objective adhesive is composed of (A) the principal ingredient obtained by mixing (i) 100pts.wt. (solid basis) of a modified or unmodified synthetic rubber latex (preferably the main component is open-chain aliphatic conjugated diene compound, a vinyl aromatic compound or an ethylenic unsaturated carboxylic acid ester) with (ii) 10-150pts.wt. (solid basis) of PVA (preferably having a polymerization degree of 300-2,500 and a saponification degree of 80-100mol%), and if necessary, (iii) 50-600pts.wt. of a filler or extender, and adding (iv) 0.2-7pts.wt. each of two kinds of nonionic surface active agents having an HLB of >=17 and <=14, respectively, and (B) a crosslinking agent comprising an isocyanate compound or its polymer. EFFECT:Free from formalin. USE:Manufacture of plywoods, secondary processing of plywoods, etc.
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