Low-temperature heat-seal acrylic emulsion for coating and preparation method thereof

An acrylic emulsion and low-temperature heat-sealing technology, which is applied in the direction of coating, etc., can solve the problems of lower sealing temperature and high sealing temperature

Active Publication Date: 2013-01-02
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

[0004] For the high problem of the high sealing temperature that acrylic acid exists in the existing market, the object of the present invention is to provide a kind of low-temperature heat-sealable acrylic emulsion for coating, be coated on biaxially stretched polypropylene film (BOPP) with this emulsion, Coating films for low-temperature heat sealing can be produced, the sealing temperature can be reduced to 80°C, and the heat-sealing strength is 1.8-2.2N / 15mm (heat-sealing conditions: 80°C, 0.14MPa, 0.75s)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Take by weighing methyl methacrylate 11kg, methyl acrylate 6kg, acrylic acid 1kg, put into batching kettle and stir for 0.5 hour, stirring speed is 80 rev / mins, obtain blending monomer; Then take by weighing potassium persulfate 0.4kg and put into 24kg of deionized water, stirred evenly, was made into solution A; then weighed 0.18kg of alkylphenol allyl polyether sulfate, 0.02kg of polyoxyethylene nonylphenol phosphate as emulsifier, 1kg of blended monomer, and Add 53.1kg of deionized water into the reaction kettle, stir at a speed of 200 rpm, and the temperature in the kettle rises to 80°C. When a blue-light milky white liquid appears, add the remaining blended monomers and solution A dropwise at the same time , keep the temperature in the kettle at 82°C, control the dropping rate within 2.5 hours, then drop the temperature to 60°C; add 4kg of ammonia water to adjust the pH value to 10; finally add 0.3kg of 1,2-benzisothiazol-3-one Filtrate and discharge, make acrylic ...

Embodiment 2

[0015] Take by weighing 22kg of ethyl methacrylate, 6kg of ethyl acrylate, 6kg of isooctyl acrylate, and 1kg of acrylic acid, put them into a batching kettle and stir for 0.5 hour at a stirring speed of 100 rpm to obtain a blended monomer; then weigh over Put 0.8kg of ammonium sulfate into 40kg of deionized water, stir evenly, and make solution A; then weigh 0.16kg of acrylamido sulfonate and 0.04kg of alcohol ether sulfosuccinic acid monoester disodium salt as emulsifier, blend Add 2kg of monomer and 117.9kg of deionized water into the reaction kettle, stir at a speed of 250 rpm, and the temperature in the kettle rises to 78°C. When a blue light milky white liquid appears, add the remaining blended monomer and solution A Add it dropwise, keep the temperature in the kettle at 80°C, control the rate of addition within 2 hours, then drop the temperature to 57°C; add 6kg of ammonia water to adjust the pH value to 9.6; finally add 0.1kg of 1,2-benzisothiazole- 3-ketone; filter the...

Embodiment 3

[0017] Weigh 4kg of methyl methacrylate, 4kg of ethyl methacrylate, 1kg of methyl acrylate, 1kg of ethyl acrylate, 1kg of isooctyl acrylate, and 0.3kg of acrylic acid, put them into the batching kettle and stir for 0.5 hours at a stirring speed of 150 rpm / minute, to obtain the blended monomer; then take by weighing potassium persulfate 0.1kg, ammonium persulfate 0.1kg and drop into 40kg deionized water, stir evenly, be made into solution A; then take by weighing acrylamidosulfonate 0.007kg, Alcohol ether sulfosuccinic acid monoester disodium salt 0.003kg is used as an emulsifier, 0.5kg of blended monomers, and 11.2kg of deionized water are added to the reaction kettle, stirred at a speed of 300 rpm, and the temperature in the kettle rises to 75 ℃, when there is a blue-light milky white liquid, add the remaining blended monomers and solution A dropwise, keep the temperature in the kettle at 81°C, control the dropping speed to finish dropping within 3.5 hours, then cool down to...

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Abstract

The invention relates to a low-temperature heat-seal acrylic emulsion for coating and a preparation method thereof. The paint is prepared from the following raw materials in percentage by mass: 85-95% of modified acrylic emulsion and 5-15% of ethylene-acrylic acid copolymer emulsion (EAA emulsion for short). The modified acrylic emulsion is prepared from the following raw materials in percentage by mass: 11-18% of methacrylate, 3-6% of acrylate, 0.1-1% of acrylic acid, 0.01-0.2% of emulsifier, 0.01-0.1% of electrolyte, 0.4-0.6% of initiator, 1-4% of neutralizer, 72-80% of deionized water and 0.05-0.3% of bactericide. The emulsion can be coated on a biaxially-oriented polypropylene (BOPP) film to prepare a coating film for low-temperature heat seal, wherein the initial seal temperature can be lowered to 80 DEG C, and the heat-seal strength is 1.8-2.2N/15mm (the heat-seal conditions are 80 DEG C, 0.14 MPa and 0.75s). The low-temperature heat-seal acrylic emulsion can be used for quickly packaging some candy products of which the packaging temperature is controlled at 85 DEG C below.

Description

technical field [0001] The invention relates to a low-temperature heat-sealable acrylic emulsion for coating and a preparation method thereof. The coated film obtained by coating the emulsion can be widely used in packaging of chocolates, chewing gums, etc., and belongs to the field of new environment-friendly polymers. Background technique [0002] As one of the important products in the food industry, candy has long been popular and loved by sweet tooth lovers and children. According to incomplete statistics, the global output of candy and chocolate products approached 20 million tons in 2010. Such a huge candy market also promotes the rapid development of the candy packaging industry. At present, the candy packaging materials in the market are mainly aluminized composite films and coated films, and their heat sealing performance mainly depends on composite PE or CPP heat-sealing materials (sealing temperature > 110°C), which can meet the requirements of non-heat-sensit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/10C09D123/08C08F220/14C08F220/18C08F220/06C08F2/26
Inventor 邢青涛黄宏存
Owner HAINAN BNK WATER BASED NEW MATERIAL CO LTD
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