Modified vinyl acetate-acrylic emulsion adhesive with antibacterial function and preparation method thereof
A vinyl acetate-acrylate emulsion and adhesive technology, applied in the directions of monocarboxylic acid ester copolymer adhesive, adhesive type, resistance to vector-borne diseases, etc. Conducive to long-term storage, improved hydrolysis resistance, and improved performance
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Embodiment 1
[0022] (1) Preparation of antibacterial monomer: at room temperature, react 10g of α-methyl-D-mannoside with 1.9g of isocyanoethyl methacrylate, take 50mL of dichloromethane as the reaction solvent, and react for 72h to obtain antibacterial monomer.
[0023] (2) Preparation of modified sorbitol: Dissolve 10g of sorbitol in 50mL of tetrahydrofuran or cyclohexane solution, then gradually add 1.2g of isocyanomethacrylate, stir and heat the reaction mixture, and react at 90°C for 24h The reaction mixture was stirred and heated.
[0024] (3) Preparation of modified vinegar-acrylic emulsion adhesive with antibacterial function: add 50mL deionized water and 5g polyvinyl alcohol to a four-necked flask with heating, electric stirring, condensation and nitrogen conduit, and heat to 70°C Continue to stir for 1 hour, then cool to 40°C, then add 0.1g of buffer solution, the buffer solution is an aqueous solution of sodium acetate and ferrous sulfate with a weight ratio of 1:2, then add 10...
Embodiment 2
[0026] 1) Preparation of antibacterial monomer: at room temperature, 15g of 4-isothiohydrophenyl-A-D-mannoside was reacted with 2.85g of isocyanoethyl methacrylate, and 100mL of dichloromethane was used as the reaction Solvent, reaction 72 to obtain antibacterial monomer h.
[0027] 2) Preparation of modified sorbitol: Dissolve 20g of sorbitol in 100mL of tetrahydrofuran or cyclohexane solution, then gradually add 2.4g of isocyanomethacrylate, stir and heat the reaction mixture, react at 90°C for 24h and stir and heat the reaction mixture.
[0028] 3) Preparation of modified vinegar-acrylic emulsion adhesive with antibacterial function: Add 100mL deionized water and 10g polyvinyl alcohol into a four-necked flask equipped with heating, electric stirring, condensation and nitrogen conduit, and heat it to 70°C Continue to stir for 2 hours, then cool to 50°C, then add 0.5g of buffer solution, the buffer solution is an aqueous solution of sodium acetate and ferrous sulfate with a ...
Embodiment 3
[0030] 1) Preparation of antibacterial monomer: at room temperature, 20g of 4-methylumbelliferyl α-D-mannopyranoside was reacted with 3.8g of isocyanoethyl methacrylate, and 150mL of dichloromethane was used as Reaction solvent, react for 72h to obtain antibacterial monomer.
[0031] 2) Preparation of modified sorbitol: Dissolve 30g of sorbitol in 150mL of tetrahydrofuran or cyclohexane solution, then gradually add 3.6g of isocyanomethacrylate, stir and heat the reaction mixture, react at 90°C for 24h and stir and heat the reaction mixture.
[0032]3) Preparation of modified vinegar-acrylic emulsion adhesive with antibacterial function: add 150mL deionized water and 15g polyvinyl alcohol to a four-necked flask equipped with heating, electric stirring, condensation and nitrogen conduit, and heat to 70 °C Continue to stir for 4 hours, then cool to 40°C, then add 0.3g of buffer solution, the buffer solution is an aqueous solution of sodium acetate and ferrous sulfate with a weig...
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