Low-temperature heat-seal acrylic emulsion and preparation method thereof and application thereof
An acrylic emulsion, low-temperature heat-sealing technology, applied in transportation and packaging, flexible coverings, coatings, etc., can solve the problems of unsatisfactory, high sealing temperature, etc., achieve good uniformity, high heat-sealing strength, and eliminate foam Effect
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Embodiment 1
[0050] 1. Raw material preparation: Mix 37.5kg of 2-ethylhexyl acrylate, 10kg of acrylonitrile and 2.5kg of methacrylic acid, stir for 2 hours to make a mixed monomer; add 160g of tert-butyl hydroperoxide to 8kg of deionized water Stir and mix in tert-butyl hydroperoxide solution; Add 160g of sodium formaldehyde sulfoxylate into deionized water 8kg and stir and mix to make sodium formaldehyde sulfoxylate solution; 2A-1 is 340g, secondary chain Dissolve 1.2kg of sodium alkylsulfonate in water, add water to 10kg, and carry out cold dispersion for 2 hours to make a mixed emulsifier solution;
[0051] 2. Seed polymerization: 50kg of deionized water, 24g of ammonium acetate, 5g of ferrous chloride, 45g of sodium paraffin sulfonate and 140g of MA-80 were used to seal the kettle, replace it with nitrogen for 3 times, and then vacuumize it. Inhale 5% mixed monomer as seed monomer, cold disperse for 0.5h, heat up to 47°C, pump in initiator tert-butyl hydroperoxide solution and sodium f...
Embodiment 2
[0062] 1. Raw material preparation: Mix 45kg of 2-ethylhexyl acrylate, 2.5kg of acrylonitrile and 2.5kg of methacrylic acid, stir for 2 hours to make a mixed monomer; add 160g of tert-butyl hydroperoxide to 8kg of deionized water tert-butyl hydroperoxide solution; 160g of sodium formaldehyde sulfoxylate was added into deionized water 8kg and stirred and mixed to make sodium formaldehyde sulfoxylate solution; 2A-1 was 500g, secondary chain Dissolve 1.6kg of sodium alkylsulfonate in water, add water to 10kg, and carry out cold dispersion for 2 hours to make a mixed emulsifier solution;
[0063] 2. Seed polymerization: 50kg of deionized water, 24g of ammonium acetate, 5g of ferrous chloride, 45g of sodium paraffin sulfonate and 140g of MA-80 were used to seal the kettle, replace it with nitrogen for 3 times, and then vacuumize it. Inhale 5% mixed monomer as seed monomer, cold disperse for 0.5h, heat up to 47°C, pump in initiator tert-butyl hydroperoxide solution and sodium formal...
Embodiment 3
[0066] 1. Preparation of raw materials: Mix 40kg of 2-ethylhexyl acrylate, 6kg of acrylonitrile and 4kg of methacrylic acid, stir for 2 hours to make a mixed monomer; add 160g of tert-butyl hydroperoxide into 8kg of deionized water for Stir and mix to make tert-butyl hydroperoxide solution; add 160 g of sodium formaldehyde sulfoxylate into 8 kg of deionized water and stir and mix to make sodium formaldehyde sulfoxylate solution; 2A-1 is 450 g, secondary chain alkyl Dissolve 1.5kg of sodium sulfonate in water, add water to 10kg, and carry out cold dispersion for 2 hours to make a mixed emulsifier solution;
[0067] 2. Seed polymerization: 50kg of deionized water, 24g of ammonium acetate, 5g of ferrous chloride, 45g of sodium paraffin sulfonate and 140g of MA-80 were used to seal the kettle, replace it with nitrogen for 3 times, and then vacuumize it. Inhale 5% mixed monomer as seed monomer, cold disperse for 0.5h, heat up to 47°C, pump in initiator tert-butyl hydroperoxide solu...
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