Water-based polymer isocyanate wood adhesive and preparation method thereof
A wood adhesive, water-based polymer technology, used in adhesives, polyurea/polyurethane adhesives, adhesive types, etc., can solve problems affecting the environment and users' health, improve compatibility, and enhance wet bonding Strength and water and weather resistance and aging resistance, the effect of prolonging the pot life
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[0050] Example 1
[0051] 1. Adhesive formula:
[0052] Main agent: polyvinyl alcohol, 10 parts;
[0053] Composite polyol (made by mixing soybean oil polyol, castor oil and polyol benzoate in a weight ratio of 10:10:80), 6 parts;
[0054] 22 parts of silica sol;
[0055] Filler (titanium dioxide), 12 parts;
[0056] water, 50 parts;
[0057] Surfactant (sodium dodecylbenzenesulfonate), 0.1 part;
[0058] Defoamer (n-butanol), 0.1 part;
[0059] Preservative (isothiazolinone), 0.1 part;
[0060]Cross-linking agent: (polyphenyl polymethylene polyisocyanate), the amount of which is 15% of the main agent.
[0061] 2. Preparation method:
[0062] 1) Weigh each component according to the formula, for subsequent use;
[0063] 2) First add water to the reactor with heating stirrer, add polyvinyl alcohol and defoamer, heat up to 93 °C and keep warm until the polyvinyl alcohol is completely dissolved, then cool the system to 70 °C, add surfactant, keep warm The reaction was s...
Example Embodiment
[0071] Example 2
[0072] 1. Adhesive formula:
[0073] Main agent: polyvinyl alcohol, 12 parts;
[0074] Composite polyol (composed of castor oil and polyol benzoate in a weight ratio of 1:4), 3 parts;
[0075] 22 parts of silica sol;
[0076] Filler (composed of calcium carbonate and talc in a weight ratio of 1:1), 8 parts;
[0077] water, 55 parts;
[0078] Surfactant (sodium dodecylbenzenesulfonate), 0.2 part;
[0079] Defoamer (tributyl phosphate), 0.05 part;
[0080] Preservative (isothiazolinone), 0.05 part;
[0081] Cross-linking agent: 1,6-hexamethylene diisocyanate, the amount of which is 10% of the main agent.
[0082] 2. Preparation method:
[0083] 1) Weigh each component according to the formula, for subsequent use;
[0084] 2) First add water into the reaction kettle with heating stirrer, add polyvinyl alcohol and defoamer, heat up to 95°C and keep warm until the polyvinyl alcohol is completely dissolved, then cool the system to 65°C, add surfactant, ke...
Example Embodiment
[0089] Example 3
[0090] 1. Adhesive formula:
[0091] Main agent: polyvinyl alcohol, 9 parts;
[0092] Composite polyol (obtained by mixing soybean oil polyol, castor oil and polyol benzoate in a weight ratio of 15:15:50), 4 parts;
[0093] 18 parts of silica sol;
[0094] Filler (composed of kaolin and talc in a weight ratio of 2:1), 9 parts;
[0095] water, 60 parts;
[0096] Surfactant (sodium dodecylbenzenesulfonate), 0.05 part;
[0097] Defoamer (composed of n-butanol and tributyl phosphate in a weight ratio of 1:1), 0.15 parts;
[0098] Preservative (isothiazolinone), 0.2 part;
[0099] Cross-linking agent: diphenylmethane diisocyanate, the amount of which is 20% of the main agent.
[0100] 2. Preparation method:
[0101] 1) Weigh each component according to the formula, for subsequent use;
[0102] 2) First add water into the reaction kettle with heating stirrer, add polyvinyl alcohol and defoamer, heat up to 92 °C and keep warm until the polyvinyl alcohol is...
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