Waterproof and oilproof agent as well as preparation method and application thereof

A water- and oil-repellent, deionized water technology, applied in coatings, paper coatings, paper, etc., can solve problems such as inability to directly recycle and reuse, hidden dangers to human health and safety, and difficulty in paper separation, achieving superior safety, environmental protection, and waterproofing. Improved oil-repellent effect, good waterproof and oil-repellent performance

Inactive Publication Date: 2020-10-09
ZHONGSHAN TIAN JIA PAPER PROD
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AI Technical Summary

Problems solved by technology

The coated paper adopts the extrusion composite process, and plastic particles such as polyethylene (PE) and polypropylene (PP) are coated on the surface of the paper through a casting machine. The coated paper has excellent performance in terms of water resistance and oil penetration , but this kind of material cannot be degraded, it is difficult to separate from paper and cannot be directly recycled and reused, which brings great pollution to the environment
There are also fluorine-containing oil repellents added to the pulp to endow the paper with excellent oil-repellent performance and solve the problem of degradation and recycling. However, fluorine-containing oil repellents contain risk substances such as PFOA, PFOS and mineral oil, which are harmful to human health. safety hazard

Method used

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  • Waterproof and oilproof agent as well as preparation method and application thereof

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preparation example Construction

[0026] Such as figure 1 Shown, the preparation method of water and oil repellent of the present invention specifically comprises the following steps:

[0027] Step S100. Add polyvinyl alcohol, plasticizer, and beeswax emulsion into deionized water, and stir and mix uniformly at a constant temperature, and then cool to room temperature to obtain a mixed solution A; wherein, the uniform stirring and mixing at a constant temperature is specifically: at 70~ Stir and mix evenly in a constant temperature water bath under the condition of 95°C, and the time of the constant temperature water bath is preferably 60-90 minutes.

[0028] Step S200. Disperse the modified starch in the aqueous solution, and perform stirring and ultrasonic vibration to form a uniformly dispersed starch solution to obtain solution B; wherein, the stirring and ultrasonic vibration refer to mechanical stirring, and then placed in an ultrasonic Ultrasonic vibration in the cleaning agent, stirring for 0.5 to 1 h...

Embodiment 1

[0036] (1) Add 2.5% polyvinyl alcohol, 0.5% glycerin, and 5% beeswax emulsion into 60% deionized water, stir and mix evenly in a constant temperature water bath at 70°C for 60 minutes, and cool to room temperature to obtain a mixed solution A;

[0037] (2) Disperse the modified starch in the aqueous solution, stir it mechanically for 0.5 h, and then place it in an ultrasonic cleaning agent and oscillate it ultrasonically for 5 min to form a uniformly dispersed starch solution to obtain solution B;

[0038] (3) Add 30% and 2% solution B of styrene-acrylic acid polymer into the mixed solution A, and stir evenly at room temperature to obtain the water and oil repellent;

[0039] (4) Apply the waterproof and oil-repellent agent to the surface of food-grade base paper, dry it, and place it under constant temperature and humidity (temperature 23° C., humidity 50%) for 48 hours to obtain a water-based fluorine-free waterproof and oil-repellent coating.

[0040] (5) Using the T559 sta...

Embodiment 2

[0042] (1) Add 3.5% polyvinyl alcohol, 1% epoxidized soybean oil, and 7.5% beeswax emulsion into 45% deionized water, stir and mix evenly in a constant temperature water bath at 70°C for 80 minutes, and cool to room temperature to obtain a mixed solution A;

[0043] (2) Disperse the modified starch in the aqueous solution, stir it mechanically for 0.5 h, and then place it in an ultrasonic cleaning agent and oscillate ultrasonically for 15 min to form a uniformly dispersed starch solution to obtain solution B;

[0044] (3) Add 39% and 4% solution B of styrene-acrylic acid polymer into the mixed solution A, and stir evenly at room temperature to obtain the waterproof and oil-repellent agent;

[0045](4) Apply the waterproof and oil-repellent agent to the surface of food-grade base paper, dry it, and place it under constant temperature and humidity (temperature 23° C., humidity 50%) for 48 hours to obtain a water-based fluorine-free waterproof and oil-repellent coating.

[0046] ...

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Abstract

The invention relates to a waterproof and oilproof agent as well as a preparation method and application thereof. The waterproof and oilproof agent is prepared from the following components in percentage by weight: 30%-50% of styrene acrylic polymer, 5%-10% of beeswax emulsion, 2.5%-4.5% of polyvinyl alcohol, 2%-5.5% of modified starch, 0.5%-2% of plasticizer and 28%-60% of deionized water. The waterproof and oilproof agent is good in film-forming property; beeswax emulsion in a formed coating and the styrene-acrylic acid polymer are combined to form a hydrophobic and oleophobic surface layer;meanwhile, the hydrophobic and oleophobic surface layer is compounded with the modified starch, so that the waterproof and oilproof effects of the waterproof and oilproof coating on food-grade raw paper are obviously improved; the waterproof and oilproof properties of the waterproof and oilproof agent are extremely good; the waterproof and oilproof agent can completely replace traditional waxing,silicon coating and laminating processes; and the paper can directly enter a papermaking pulping system to be recycled when being recycled, the pollution of the laminated paper to the environment isreduced; and therefore, the waterproof and oilproof agent is an environment-friendly material.

Description

technical field [0001] The invention belongs to the technical field of food packaging and waterproof and oil-proof, and in particular relates to a waterproof and oil-proof agent, a preparation method and an application. Background technique [0002] As people's requirements for a better life are getting higher and higher, the use of food packaging paper is also increasing. Food packaging paper commonly used in daily life, such as takeaway lunch boxes and fast food packaging, needs to have good waterproof and oil-proof performance. [0003] But the applicant found that most of the waterproof and oil-proof food wrapping papers on the market are coated papers. The coated paper adopts the extrusion composite process, and plastic particles such as polyethylene (PE) and polypropylene (PP) are coated on the surface of the paper through a casting machine. The coated paper has excellent performance in terms of water resistance and oil penetration , but this kind of material cannot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H19/10D21H17/06D21H17/28D21H17/36D21H17/37D21H17/60
CPCD21H17/06D21H17/28D21H17/36D21H17/37D21H17/60D21H19/10
Inventor 陈挺孙小玲朱华杨谭康梅
Owner ZHONGSHAN TIAN JIA PAPER PROD
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