High-water-resistance urea-formaldehyde resin adhesive and preparation method thereof

The invention relates to a high-water-resistance urea-formaldehyde resin adhesive and a preparation method thereof.The preparation method comprises the following steps that 1, materials are prepared according to the initial molar ratio of formaldehyde to urea of 2.0-1.5: 1 and the final molar ratio of formaldehyde to urea of 1.0-1.2: 1, and the mass percent concentration of formaldehyde is 35-40%; step 2, adding a formaldehyde solution into the reaction kettle, starting a stirrer, and adjusting the pH value to 7.5-8.0 by using an alkaline solution; 3, urea is added for the first time, the heating speed is controlled, and the reaction liquid is slowly heated to 90 +/-2 DEG C within 30-40 min; the high-water-resistance urea-formaldehyde resin adhesive prepared by the invention has the advantages of low formaldehyde emission, high water resistance and the like, is simple in process, and is suitable for the fields of artificial board production and the like. 本发明涉及一种高耐水性脲醛树脂胶黏剂及其制备方法，包括以下步骤，步骤1，按照甲醛与尿素初始摩尔比为2.0-1.