PVDC (Polyvinyl Dichloride) coating material with high barrier property and preparation method thereof

A coating material and high-barrier technology, applied in the field of PVDC coating materials and its preparation, can solve the problems of poor thermal stability and barrier failure of PVDC latex, achieve strong light redox function, prevent sedimentation and coagulation, and polymerize effects Good results

Inactive Publication Date: 2018-07-31
席海龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a PVDC coating material with high barrier performance and its preparation method, which has the advantages of high-efficiency barrier, high-efficiency antibacterial, anti-mildew, and high-efficiency mechanical strength, and solves the problem of thermal stability of PVDC latex. Poor, when it is heated or placed at room temperature for a long time, it is easy to produce double bond conjugation, escape hydrogen chloride, cause cavities between molecules, and technical problems of barrier failure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) Evenly disperse 10 parts by mass of silica nanoparticles with a particle size of 30nm in 50 parts by mass of ultrapure water, heat to 80°C, stir for 5min, and then add 0.05 parts by mass of ammonia water and 0.4 parts by mass of Aminopropyltriethoxysilane, fully stirred for 6 hours, cooled to room temperature, centrifuged, rinsed with deionized water three times, washed the unreacted substances to obtain a solid, and put the obtained solid into a ball mill for 12 hours , to obtain amino-modified silica powder;

[0051] (2) Add 0.5 g of amino-modified silica powder to 20 parts by mass of ultrapure water, stir and dissolve fully, add 2 parts by mass of piperazine aqueous solution with a mass fraction of 2%, and add 3 parts by mass after stirring and dissolving The mass fraction of one part is 3% triethylamine, after stirring and dissolving, the aqueous phase solution is prepared;

[0052] (3) Dissolve 10 parts by mass of trimesoyl chloride light yellow solid powder i...

Embodiment 2

[0068] (1) Evenly disperse 12 parts by mass of silica nanoparticles with a particle size of 50nm in 55 parts by mass of ultrapure water, heat to 90°C, stir for 8min, and then add 0.08 parts by mass of ammonia water and 0.8 parts by mass of Aminopropyltriethoxysilane, fully stirred for 6 hours, cooled to room temperature, centrifuged, rinsed with deionized water three times, washed the unreacted substances to obtain a solid, and put the obtained solid into a ball mill for 12 hours , to obtain amino-modified silica powder;

[0069] (2) Add 0.8 g of amino-modified silica powder to 25 parts by mass of ultrapure water. After fully stirring and dissolving, add 4 parts by mass of piperazine aqueous solution with a mass fraction of 2%. After stirring and dissolving, add 5 parts by mass of The mass fraction of one part is 3% triethylamine, after stirring and dissolving, the aqueous phase solution is prepared;

[0070] (3) dissolving 15 parts by mass of trimesoyl chloride light yellow ...

Embodiment 3

[0086] (1) Evenly disperse 15 parts by mass of silica nanoparticles with a particle size of 60nm in 60 parts by mass of ultrapure water, heat to 100°C, stir for 10 minutes, and then add 0.08 parts by mass of ammonia water and 1 part by mass of Aminopropyltriethoxysilane, fully stirred for 6 hours, cooled to room temperature, centrifuged, rinsed with deionized water three times, washed the unreacted substances to obtain a solid, and put the obtained solid into a ball mill for 12 hours , to obtain amino-modified silica powder;

[0087] (2) Add 1.0 g of amino-modified silica powder to 30 parts by mass of ultrapure water. After fully stirring and dissolving, add 5 parts by mass of piperazine aqueous solution with a mass fraction of 2%. After stirring and dissolving, add 7 mass parts The mass fraction of one part is 3% triethylamine, after stirring and dissolving, the aqueous phase solution is prepared;

[0088] (3) Dissolve 15 parts by mass of trimesoyl chloride light yellow soli...

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Abstract

The invention discloses a PVDC (Polyvinyl Dichloride) coating material with a high barrier property. The PVDC coating material comprises a modified PA (Polyamide) film, wherein the surface of the outer side of the modified PA film is coated with modified PVDC latex; the surface of the inner side of the modified PA film is coated with modified PVDC nano adhesive; the modified PVDC latex is preparedfrom the following raw materials: ultrapure water, a PH value buffer regulator, a vinylidene chloride monomer, a methyl acrylate monomer, an initiator and a dispersant; the thickness of the modifiedPA film is 3.5mu m to 4.0mu m; the thickness of the modified PVDC latex covered on the surface of the outer side of the modified PA film is 2.5mu m to 3.0mu m; the thickness of the modified PVDC nanoadhesive covered on the surface of the inner side of the modified PA film is 1.5mu m to 1.8mu m. The PVDC coating material, within continuous 24h under atmospheric pressure, has the oxygen transmission rate of 0.018ml/mil/100in<2> to 0.053ml/mil/100in<2>, and at the temperature of 100 DEG C and under the relative humidity of 90 percent, has the moisture transmission rate of 0.009ml/mil/100in<2> to0.012ml/mil/100in<2>, and the PVDC coating material is used for solving the technical problems that PVDC latex is poorer in heat stability, when being heated or put for a longer time at a normal temperature, easily generates double bond conjugation, releases chlorine hydride, enables a cavity to be formed between molecules and is invalid in barrier property.

Description

technical field [0001] The invention relates to the technical field of high barrier coating materials, in particular to a PVDC coating material with high barrier performance and a preparation method thereof. Background technique [0002] PVDC (chemical name polyvinylidene chloride) is a packaging material with the best comprehensive barrier performance among plastic packaging in the world today. It is not only different from polyvinyl alcohol, which makes the gas barrier performance drop sharply with the increase of moisture absorption, nor is it different from nylon film, which makes the moisture barrier performance worse due to water absorption, but it is a high barrier performance material with excellent moisture barrier and gas barrier performance. . PVDC has a long history of application abroad. Since DOW Chemical in the United States first realized industrial production in the 1930s, PVDC has become synonymous with high barrier, and the packaging industry even calls ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/08C09D7/61C09D7/63C09D7/65C09D105/08C09D101/28C09D5/14C08J7/04C08L29/04C08K13/06C08K9/06C08K3/36C08K5/3462C08J5/18
CPCC08J7/042C08J5/18C08J2329/04C08J2427/08C08K3/36C08K5/3462C08K9/06C08K13/06C08K2201/011C09D5/14C09D7/61C09D7/63C09D7/65C09D7/70C09D127/08C08L5/08C08L1/28C08K7/06
Inventor 不公告发明人
Owner 席海龙
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