Preparation method of water-resistant adhesive for processing corrugated paperboard
A corrugated cardboard and adhesive technology, applied in the directions of adhesives, adhesive types, adhesive additives, etc., can solve the problems of useless cardboard, decreased adhesive performance, and inability to meet the cardboard, and achieves reduction of dosage, enhancement of filling performance, and improvement of The effect of adhesive properties
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Embodiment 1
[0027] (1) Modification of polyglutamic acid: add water to 50g food grade polyglutamic acid at 25°C to form a saturated solution, add 50% dilute sulfuric acid dropwise to adjust the pH value of the solution to 4-5, then add 15g N-methylol Diacetone acrylamide, add water to completely dissolve N-methylol acrylamide, heat to 70-80°C and keep stirring to react. After the esterification reaction, add 10g diacetone acrylamide and 0.5g potassium persulfate, add water to make the Acetone acrylamide and potassium persulfate are completely dissolved, and then heated to a reflux state with heat preservation and stirring for reaction. After the polymerization reaction is completed, the heating is stopped, and the obtained mixture is concentrated under reduced pressure to make a paste with a solid content of 75-85%. The paste is naturally cooled to After room temperature, it is sent to a freeze dryer, and the solid obtained by drying is made into a fine powder by an ultrafine pulverizer to...
Embodiment 2
[0031] (1) Modification of polyglutamic acid: Add water to 60g food grade polyglutamic acid at 25°C to form a saturated solution, add 50% dilute sulfuric acid dropwise to adjust the pH value of the solution to 4-5, then add 20g N-methylol Diacetone acrylamide, add water to completely dissolve N-methylol acrylamide, heat to 70-80°C and keep stirring to react. After the esterification reaction, add 10g diacetone acrylamide and 0.5g potassium persulfate, add water to make the Acetone acrylamide and potassium persulfate are completely dissolved, and then heated to a reflux state with heat preservation and stirring for reaction. After the polymerization reaction is completed, the heating is stopped, and the obtained mixture is concentrated under reduced pressure to make a paste with a solid content of 75-85%. The paste is naturally cooled to After room temperature, it is sent to a freeze dryer, and the solid obtained by drying is made into a fine powder by an ultrafine pulverizer to...
Embodiment 3
[0035] (1) Modification of polyglutamic acid: Add water to 60g food grade polyglutamic acid at 25°C to form a saturated solution, add 50% dilute sulfuric acid dropwise to adjust the pH value of the solution to 4-5, then add 20g N-methylol Diacetone acrylamide, add water to completely dissolve N-methylol acrylamide, heat to 70-80°C and keep stirring to react. After the esterification reaction, add 10g diacetone acrylamide and 0.5g potassium persulfate, add water to make the Acetone acrylamide and potassium persulfate are completely dissolved, and then heated to a reflux state with heat preservation and stirring for reaction. After the polymerization reaction is completed, the heating is stopped, and the obtained mixture is concentrated under reduced pressure to make a paste with a solid content of 75-85%. The paste is naturally cooled to After room temperature, it is sent to a freeze dryer, and the solid obtained by drying is made into a fine powder by an ultrafine pulverizer to...
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