Water-dispersible hot melt adhesive and preparation method thereof
A dispersion-type, hot-melt adhesive technology, applied in the direction of adhesives, adhesive types, polymer adhesive additives, etc., can solve the problems of unused mixed alcohol solutions, etc., to achieve strong adhesion, good applicability, The effect of improving the adhesive performance
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Embodiment 1
[0044] A preparation method of water-dispersible hot-melt adhesive, comprising the following steps:
[0045] S1. Add 700g of poly(1,4-butylene adipate)diol (molecular weight: 3000) into the reaction kettle, heat up to 130°C and keep it warm for 3 hours to remove water, then cool down to 65°C;
[0046] S2. Add 0.07 g of stannous octoate, 115 g of isophorone diisocyanate, and 131.5 g of hexamethylene diisocyanate, heat up to 80° C., and keep warm for 3 hours;
[0047] S3. Dissolve 37g of 1,4-butanediol and 47.5g of dimethylolpropionic acid in 118g of N-methylpyrrolidone to prepare a mixed alcohol solution, add it to the reaction kettle, heat up to 85°C, and react for 3h;
[0048] S4. Add 300g butanone to lower the viscosity, lower the temperature to 60°C, add 34g triethylamine, and react for 5 minutes;
[0049] S5, under stirring, add 1500g deionized water, disperse evenly;
[0050] S6. Cool down to room temperature, dissolve 16.5g of ethylenediamine in 50g of deionized water ...
Embodiment 2
[0054] A preparation method of water-dispersible hot-melt adhesive, comprising the following steps:
[0055] S1. Add 1400g of poly-1,6-hexanediol adipate (molecular weight: 3000) into the reaction kettle, heat up to 130°C and keep it warm for 3 hours to remove water, then cool down to 70°C;
[0056] S2. Add 0.2 g of bismuth isooctanoate, 288 g of isophorone diisocyanate, and 218 g of hexamethylene diisocyanate, heat up to 80° C., and keep warm for 2.5 hours;
[0057] S3, 3g trimethylolpropane, 47g 1,4-butanediol and 95g dimethylol propionic acid are dissolved in 240g N-methylpyrrolidone to prepare a mixed alcohol solution, and the mixed alcohol solution is added to the reaction kettle, Raise the temperature to 85°C and react for 4h;
[0058] S4. Add 800g methyl ethyl ketone to lower the viscosity, lower the temperature to 60°C, add 50g dimethylethanolamine, and react for 8 minutes;
[0059] S5, under stirring, add 2800g deionized water, disperse evenly;
[0060] S6. Cool do...
Embodiment 3
[0064] A preparation method of water-dispersible hot-melt adhesive, comprising the following steps:
[0065] S1. Add 600g of polytetrahydrofuran ether diol (molecular weight 3000) and 800g of poly(1,6-hexanediol adipate) diol (molecular weight 3000) into the reaction kettle, heat up to 120°C for 3 hours, and then cool down to 75°C;
[0066] S2. Add 0.22 g of bismuth neodecanoate, 346.5 g of isophorone diisocyanate, and 174.4 g of hexamethylene diisocyanate, heat up to 80° C., and keep warm for 3 hours;
[0067] S3. Dissolve 44g of 1,6-hexanediol and 90g of dimethylolpropionic acid in 266g of N-methylpyrrolidone to prepare a mixed alcohol solution, add the mixed alcohol solution to the reactor, heat up to 90°C, and react 4h;
[0068] S4. Add 1000g methyl ethyl ketone to lower the viscosity, lower the temperature to 60°C, add 45g dimethylethanolamine, and react for 8 minutes;
[0069] S5, under stirring, add 3300g deionized water, disperse evenly;
[0070] S6. Cool down to r...
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