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Water-tolerant blocking polyvinyl alcohol coating for coating and preparation method thereof

A polyvinyl alcohol and water-resistant technology, which is applied in the coating and other directions, can solve the problems of affecting the oxygen barrier performance of the coating film, the unsatisfactory appearance of the film, and the increase in cost, so as to achieve ideal appearance, improve sensitivity, and water resistance of the coating Improved effect

Active Publication Date: 2013-07-10
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

For example, another layer of coating is covered on the polyvinyl alcohol coating or another coating is mixed to solve its water resistance problem, but the cost is greatly increased and the oxygen barrier performance of the coating film is affected; some modified polyvinyl alcohols in the market currently, Although the water resistance of the coating film is improved, the appearance of the film is not ideal and the phenomenon of moisture absorption is serious

Method used

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  • Water-tolerant blocking polyvinyl alcohol coating for coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] First, mix 0.3 kg of nano-montmorillonite with an ion exchange capacity of 80 mmol / 100 g and 12 kg of deionized water, stir at a high speed at 1000 rpm, and prepare a uniform and stable colloidal solution. Mix 70kg of polyvinyl alcohol with 1000kg of deionized water, start stirring at a speed of 150 rpm, raise the temperature to 95°C and keep it for 3 hours to completely dissolve, add 1kg of silicone defoamer, and then add nano-montmorillonite glue The solution was stirred for 2 hours. Cool down to 50°C, add 10kg of methyl etherified urea-formaldehyde resin and 3kg of citric acid, and stir for 2 hours. Finally, the temperature was lowered to room temperature, and the material was filtered out. The obtained modified polyethylene coating is coated on the machine, the substrate is a biaxially stretched polypropylene film of 19 μm, and the coating amount is 1.0g / m 2 After 48 hours of curing at 40°C, the oxygen permeability of the coating film was tested, and the results a...

Embodiment 2

[0020] First, mix 0.02 kg of nano-montmorillonite with an ion exchange capacity of 100 mmol / 100 g and 2 kg of deionized water, stir at a high speed at 1500 rpm, and prepare a uniform and stable colloidal solution. Mix 7.2kg of polyvinyl alcohol with 100kg of deionized water, start stirring at 200 rpm, raise the temperature to 100°C and keep it for 1 hour to completely dissolve, add 0.02kg of silicone defoamer, and then add nano-montmorillonite The clay gel was stirred for 0.5 hours. Cool down to 45°C, add 0.7kg of methyl etherified melamine resin and 0.03kg of alkyl phosphoric acid, and stir for 1 hour. Finally, the temperature was lowered to room temperature, and the material was filtered out. The obtained modified polyethylene coating is coated on the machine, the substrate is a biaxially stretched polypropylene film of 19 μm, and the coating amount is 1.0g / m 2 After 48 hours of curing at 40°C, the oxygen permeability of the coating film was tested, and the results are as ...

Embodiment 3

[0022] First, mix 0.25 kg of nano-montmorillonite with an ion exchange capacity of 85 mmol / 100 g and 10 kg of deionized water, stir at a high speed at 2000 rpm, and prepare a uniform and stable colloidal solution. Mix 30kg of polyvinyl alcohol with 500kg of deionized water, start stirring at a speed of 180 rpm, raise the temperature to 98°C and keep it for 2 hours to completely dissolve it, add 0.4kg of silicone defoamer, and then add nano-montmorillonite The gum was stirred for 1 hour. Cool down to 60° C., add 3 kg of methyl etherified urea-formaldehyde resin and 0.6 kg of maleic acid, and stir for 3 hours. Finally, the temperature was lowered to room temperature, and the material was filtered out. The obtained modified polyethylene coating is coated on the machine, the substrate is a biaxially stretched polypropylene film of 19 μm, and the coating amount is 1.0g / m 2 After 48 hours of curing at 40°C, the oxygen permeability of the coating film was tested, and the results ar...

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Abstract

The invention provides a water-tolerant blocking polyvinyl alcohol coating for coating and a preparation method thereof; the coating is prepared from the following raw materials in percentage by weight: 5-7% of polyving akohol, 0.01-0.05% of nanometer montmorillonite, 0.5-1% amino resin, 0.01-0.3% of catalytic agent, 0.01-0.1% of defoaming agent and 91-94% of deionized water; by adding the nanometer montmorillonite in the polyvinyl alcohol coating, after the modified coating is coated, the nanometer montmorillonite is dispersed in a polyving akohol coating in a layered structure so as to block gases such as oxygen and the like from flowing and diffusing so as to further increase the oxygen blocking performance of a polyving akohol coating membrane; and the coating is stable, has good coating adaptability, is simple in process and is suitable for industrial production.

Description

Technical field [0001] The invention relates to a water-resistant barrier polyvinyl alcohol paint for coating and a preparation method thereof, belonging to the field of new environment-friendly polymer materials. Background technique [0002] In recent years, with people's increasing requirements for food safety, high-barrier packaging materials with good environmental adaptability are attracting more and more attention from the research field and the industry. At present, polyvinylidene chloride, which occupies most of the high-barrier coating market, contains chlorine, and environmental problems are becoming increasingly prominent. Polyvinyl alcohol has a high oxygen barrier performance, and polyvinyl alcohol is non-polluting to the environment. After burning, only carbon dioxide is left And water, it is very popular as an ideal high barrier packaging material. However, with the in-depth research on polyvinyl alcohol, it is found that its water resistance is poor, that i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D129/04C09D161/32C09D7/12
Inventor 黄宏存
Owner HAINAN BNK WATER BASED NEW MATERIAL CO LTD
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