Synthetic resin adhesive for E1 grade fibreboard
A synthetic resin and adhesive technology, applied in adhesives, aldehyde/ketone condensation polymer adhesives, adhesive types, etc., can solve problems such as environmental pollution and damage
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Embodiment 1
[0032] Embodiment 1 is a kind of synthetic resin adhesive for E1 grade fiberboard according to the present invention, by following material: 37.0% formaldehyde (F), 98.0% urea (U), 99.8% melamine (M), borax, formic acid and caustic soda reaction And made.
[0033] Raw material ratio table 1, its total molar ratio is 0.99:
[0034] Table 1
[0035] Formaldehyde F 12,000KG Urea U 8,650KG Melamine M 1,050KG Borax 35KG formic acid Appropriate amount caustic soda Appropriate amount
[0036] The method of preparation is as follows:
[0037] 1) Add formaldehyde under stirring, add alkali to adjust the pH to 8.8-9.2, and raise the temperature to 40°C in 5-15 minutes;
[0038] 2) Add melamine under heat preservation at 40°C, heat up to 60°C for 20-30 minutes, measure the pH value after heat preservation for 20 minutes, and adjust the pH value to 8.5-8.7 by adding acid;
[0039] 3) Add 4150KG of urea, heat up to 90°C-93°C for 40-60m...
Embodiment 2~4
[0046] The synthetic resin adhesives for grade E1 fiberboards described in Examples 2-4 have the same raw materials and preparation methods as in Example 1, except for the ratio of raw materials and the total molar ratio. The quality index of raw material ratio and the adhesive made is as shown in table 3:
[0047]table 3
[0048]
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