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

Active Publication Date: 2013-04-24
HAINAN BNK WATER BASED NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sealing temperature of these products is high, which cannot meet the needs of modern high-speed packaging, so it is urgent to develop a low-temperature heat-sealable emulsion suitable for high-speed packaging
[0003] In view of the above-mentioned shortcomings of high sealing temperature in the existing polyvinylidene chloride emulsion and other heat-sealing materials, the present invention provides a low-temperature heat-sealing acrylic emulsion and its preparation method

Method used

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  • Low-temperature heat-seal acrylic emulsion and preparation method thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention provides a low-temperature heat-seal acrylic emulsion and a preparation method of the low-temperature heat-seal acrylic emulsion. The preparation method comprises the steps of adopting seeded emulsion polymerization and adding a defined amount of microcrystalline wax before a vacuum degassing and absorbing after-treatment. The parts of the components by weight are 100 parts, including 25 parts of monomer mixture which comprises 75-90 percent of crylic acid -2- ethyl acid ester, 5-20 percent of acrylonitrile and 5-10 percent of methacrylic acid, an initiating agent which comprises organic peroxides, methanal and sodium hydrogen sulfate, a mixed emulsifying agent which comprises a non-ionic surface active agent and secondary chain alkyl sodium sulfonate, a seeded emulsifying agent which comprises secondary chain alkyl sodium sulfonate and MA-80, an auxiliary agent which comprises ammonium acetate and ferrous chloride, and a potential of hydrogen (PH) conditioning agent. The heat-seal temperature of the low-temperature heat-seal acrylic emulsion is 40-48 DEG C. The low-temperature heat-seal acrylic emulsion is good in stability, good in particle evenness, and good in heat-seal evenness. The preparation method of the low-temperature heat-seal acrylic emulsion is used for high-speed packaging of food such as candies and chocolates with the requirement of low temperature and heat seal.

Description

technical field [0001] The invention provides a low-temperature heat-sealing acrylic emulsion used for high-speed packaging of foods requiring low-temperature heat-sealing, such as candy and chocolate, as well as a preparation method and application thereof. Background technique [0002] Today, with the accelerated pace of life or work, foods such as candy and chocolate need high-speed packaging, but the current packaging materials have poor low-temperature heat-sealing performance, and the low-temperature heat-sealing temperature is high, requiring more than 100°C, which cannot meet the current high-speed packaging requirements. need. Patent CN101358054 relates to low-temperature heat-sealed high-barrier food packaging coating film latex and its preparation method. The monomers used in the latex include vinylidene chloride accounting for 80-93% of the total amount of mixed monomers, methyl acrylate, ethyl ester, methyl acrylate Methyl acrylate, butyl, acrylonitrile or meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/44C08F220/06C08F2/30C08F2/26C09D133/08B65D65/00
Inventor 方勇邢青涛
Owner HAINAN BNK WATER BASED NEW MATERIAL CO LTD
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