Self-antibacterial type high-bonding strength melamine resin adhesive and preparation method thereof
A melamine, adhesive strength technology, applied in the direction of adhesive types, aldehyde/ketone condensation polymer adhesives, adhesives, etc., can solve the problems of mildew deterioration, water absorption and swelling, and achieve excellent water resistance and extremely low formaldehyde release. , The effect of good wear resistance
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[0026] Example 1
[0027] A self-antibacterial high adhesive strength melamine resin adhesive, the preparation process is as follows:
[0028] a. Put 60.0 parts of 37.0% formaldehyde, 16.0 parts of urea, 2.0 parts of acrylamide, 10.0 parts of melamine, and 2.2 parts of polyvinyl alcohol into the reactor according to the weight of the formula. After fully stirring, add 0.1 part of sodium hydroxide aqueous solution to Adjust the pH value of the mixed solution to 7.5~8.0, raise the temperature to 68°C, and keep the reaction temperature for 30min;
[0029] b. Cool down to 63°C, add 0.2 parts of ammonium chloride aqueous solution every 5 minutes and stir evenly, and check the pH value until the pH value of the mixture is adjusted to 4.5, continue the reaction for 10 minutes; then slowly add 0.5 sodium hydroxide aqueous solution dropwise Adjust the pH of the reaction mixture to 7.2~8.0, while heating to 78°C, add 5.0 parts of silane coupling agent, 8.0 parts of urea and 10.0 parts of mela...
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[0031] Example 2
[0032] A self-antibacterial high adhesive strength melamine resin adhesive, the preparation process is as follows:
[0033] a. Put 56.0 parts of 36.5% formaldehyde, 14.0 parts of urea, acrylamide, 8.0 parts of melamine, and 1.8 parts of polyvinyl alcohol into the reactor according to the weight of the formula. After fully stirring, use 0.1 part of sodium hydroxide aqueous solution to mix the liquid Adjust the pH value to 7.5~8.0, heat up to 66°C, keep the temperature for 40min;
[0034] b. Cool down to 62°C, add 0.2 parts of ammonium chloride aqueous solution every 5 minutes and stir evenly, and check the pH value until the pH value of the mixture is adjusted to 4.5, continue the reaction for 10 minutes; then slowly add dropwise sodium hydroxide aqueous solution 0.4 Adjust the pH value of the reaction mixture to 7.2~8.0 while heating to 76°C, add 6.2 parts of silane coupling agent, 7.0 parts of urea and 8.0 parts of melamine to continue the reaction for 15-20 minu...
Example Embodiment
[0036] Example 3
[0037] A self-antibacterial high adhesive strength melamine resin adhesive, the preparation process is as follows:
[0038] a. Put 65.0 parts of 36.0% formaldehyde, 18.0 parts of urea, 2.2 parts of acrylamide, 9.5 parts of melamine, and 3.5 parts of polyvinyl alcohol into the reactor according to the weight of the formula. After fully stirring, add 0.2 parts of sodium hydroxide aqueous solution to Adjust the pH value of the mixed solution to 7.5~8.0, increase the temperature to 70℃, and keep the temperature for 30min;
[0039] b. Cool down to 62°C, add 0.2 parts of ammonium chloride aqueous solution every 5 minutes and stir evenly, and check the pH value until the pH value of the mixture is adjusted to 4.5, continue the reaction for 10 minutes; then slowly dropwise add sodium hydroxide aqueous solution 0.6 Adjust the pH value of the reaction mixture to 7.2~8.0 while heating to 76°C, add 6.6 parts of silane coupling agent, 9.0 parts of urea and 9.5 parts of melamin...
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