Good water resistance aqueous polyurethane adhesive
A technology of water-based polyurethane and water resistance, applied in the direction of polymer adhesive additives, non-polymer adhesive additives, adhesive additives, etc., can solve the problem of reducing the water resistance of adhesives
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Embodiment 1
[0022] A water-based polyurethane adhesive with good water resistance, its raw materials include by weight: 50 parts of modified polyurethane emulsion, 1.8 parts of polyvinyl alcohol, 0.01 parts of BYK3333, 0.018 parts of water-based defoamer, 5.9 parts of kaolin powder, 0.57 parts of titanium dioxide powder 0.2 parts, water-based curing agent 0.2 parts, antioxidant 10100.3 parts, sodium dodecylbenzenesulfonate 0.5 parts, UV absorber 5310.2 parts, wetting agent Wet2650.6 parts, 3-aminopropyltriethoxysilane 0.7 parts, 0.2 parts of polysiloxane polymer compound;
[0023] Among them, the preparation method of the modified polyurethane emulsion is: nano-SiO 2 Add in ethanol, ultrasonically disperse evenly, add 3-aminopropyltriethoxysilane, continue to ultrasonically disperse evenly, pass nitrogen gas, heat up to 80°C, keep stirring for 24h, filter, wash with water, dry, and grind to obtain modified nano SiO 2 ; The modified nano-SiO 2 Adding ethanol to ultrasonic dispersion to ...
Embodiment 2
[0025] A water-based polyurethane adhesive with good water resistance, its raw materials include by weight: 60 parts of modified polyurethane emulsion, 0.06 parts of polyvinyl alcohol, 0.08 parts of BYK3333, 0.01 part of water-based defoamer, 12.9 parts of kaolin powder, 0.03 parts of titanium dioxide powder Parts, 3.9 parts of water-based curing agent, 10100.1 parts of antioxidant, 1 part of sodium dodecylbenzenesulfonate, 5310.1 parts of UV absorber, 2651 parts of wetting agent Wet, 0.3 parts of 3-aminopropyltriethoxysilane, polysilicon 0.4 part of oxane polymer compound;
[0026] Among them, the preparation method of the modified polyurethane emulsion is: nano-SiO 2 Add in ethanol, ultrasonically disperse evenly, add 3-aminopropyltriethoxysilane, continue to ultrasonically disperse evenly, pass nitrogen gas, heat up to 70°C, keep stirring for 30h, filter, wash with water, dry, and grind to obtain modified nano SiO 2 ; The modified nano-SiO 2 Adding ethanol to ultrasonic ...
Embodiment 3
[0028] A water-based polyurethane adhesive with good water resistance, its raw materials include by weight: 52 parts of modified polyurethane emulsion, 1.4 parts of polyvinyl alcohol, 0.03 parts of BYK3333, 0.016 parts of water-based defoamer, 7 parts of kaolin powder, 0.4 parts of titanium dioxide powder 1 part, water-based curing agent 1 part, antioxidant 10100.25 parts, sodium dodecylbenzenesulfonate 0.6 parts, UV absorber 5310.17 parts, wetting agent Wet2650.7 parts, 3-aminopropyltriethoxysilane 0.6 parts, 0.25 part of polysiloxane polymer compound;
[0029] Among them, the preparation method of the modified polyurethane emulsion is: nano-SiO 2 Add in ethanol, ultrasonically disperse evenly, add 3-aminopropyltriethoxysilane, continue ultrasonically disperse evenly, pass nitrogen gas, heat up to 78°C, keep stirring for 26h, filter, wash with water, dry, and grind to obtain modified nano SiO 2 ; The modified nano-SiO 2 Adding ethanol to ultrasonic dispersion to obtain mod...
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