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High barrier paint for bi-oriented polyester thin film and preparing method thereof

A biaxially oriented polyester, high-barrier technology, applied in coatings and other directions, can solve the problems of opaque environment, low cost, unfriendliness, etc.

Pending Publication Date: 2019-07-12
HARBIN INST OF TECH WUXI RES INST OF NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, PVDC polyester coating film has good oxygen barrier and moisture barrier properties at the same time, the cost is low, and it is widely used. But the cost is high and it is opaque;
[0004] Existing high-barrier solutions on the market have their limitations, such as high cost, water sensitivity, opacity or environmental friendliness

Method used

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  • High barrier paint for bi-oriented polyester thin film and preparing method thereof
  • High barrier paint for bi-oriented polyester thin film and preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A high-barrier coating for biaxially stretched polyester film, comprising the following components by mass percentage: 20 parts of acrylate copolymer, 77.9 parts of mixed solvent, 0.1 part of nano-flaky clay, and 2 parts of isocyanate crosslinking agent share.

[0044] Wherein, the comonomer of the acrylate copolymer comprises, by mass percentage, 53 parts of methyl methacrylate, 40 parts of methyl acrylate, and 7 parts of hydroxyethyl methacrylate; the mixed solvent has a mass ratio of 1:1 mixed solvent of ethyl acetate and butyl acetate; the average particle size of the nano-flaky clay is 100nm, and the thickness is 20nm.

[0045] A kind of preparation method for the high barrier coating of biaxially stretched polyester film, by mass percentage:

[0046] (1) Weigh 8 parts of methyl acrylate, 10.6 parts of methyl methacrylate, 1.4 parts of hydroxyethyl methacrylate, 20 parts in total and 73 parts of mixed solvent and add them to the reaction kettle. At a stirring spee...

Embodiment 2

[0051] A high-barrier coating for biaxially stretched polyester film, comprising the following components by mass percentage: 25 parts of acrylate copolymer, 72.95 parts of mixed solvent, 0.05 part of nano-flaky clay, and 2 parts of isocyanate crosslinking agent share.

[0052] Wherein, the comonomer of the acrylate copolymer comprises, by mass percentage, 80 parts of methyl methacrylate, 13 parts of methyl acrylate, and 7 parts of hydroxyethyl methacrylate; the mixed solvent has a mass ratio of A 1:1 mixed solvent of ethyl acetate and butyl acetate; the average particle size of the nano-flaky clay is 100 nm, and the thickness is 15 nm.

[0053] A kind of preparation method for the high barrier coating of biaxially stretched polyester film, by mass percentage:

[0054] (1) Weigh 3.25 parts of methyl acrylate, 20 parts of methyl methacrylate, 1.75 parts of hydroxyethyl methacrylate, 25 parts in total and 68 parts of mixed solvent and add them to the reactor. Under the conditi...

Embodiment 3

[0059] A high-barrier coating for biaxially stretched polyester film, comprising the following components by mass percentage: 30 parts of acrylate copolymer, 67.92 parts of mixed solvent, 0.08 part of nano-flaky clay, and 2 parts of isocyanate crosslinking agent share.

[0060] Wherein, the comonomer of the acrylate copolymer comprises, by mass percentage, 73 parts of methyl methacrylate, 20 parts of methyl acrylate, and 7 parts of hydroxyethyl methacrylate; the mixed solvent has a mass ratio of 1:1 mixed solvent of ethyl acetate and butyl acetate; the average particle size of the nano-flaky clay is 160nm, and the thickness is 15nm.

[0061] A kind of preparation method for the high barrier coating of biaxially stretched polyester film, by mass percentage:

[0062](1) Weigh 6 parts of methyl acrylate, 21.9 parts of methyl methacrylate, 2.1 parts of hydroxyethyl methacrylate, 30 parts in total, and 63 parts of mixed solvent and add them to the reaction kettle. At a stirring sp...

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Abstract

The invention discloses a high barrier paint for a bi-oriented polyester thin film and a preparing method thereof. The high barrier paint is prepared from, by mass, 20-40 parts of acrylate copolymers,2 parts of an isocyanate cross-linking agent, 0.001-0.1 part of a nanosheet material and the balance mixed solvent. According to the high barrier paint, gas molecules pass through the nanosheet material with difficulty, and cross linking makes the paint more compact; the compact high barrier resin is mixed with the nanosheet material, so that cross linking is further conducted to make most of oxygen and water blocked on the outer side, the contact with the interior of a package is reduced, and thus the purpose of prolonging the service life of a goods shelf is achieved.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a high-barrier coating for biaxially stretched polyester films and a preparation method thereof. Background technique [0002] my country's total packaging output value reaches 500 billion yuan, of which plastic packaging film accounts for 38%, and the demand growth rate is more than 10%. In my country, coating-type high-barrier packaging films are in the growth period of popularization and use. Domestically produced barrier films are mostly used in the packaging of low-end products. Barrier films with excellent performance still need to be imported in large quantities, so the market space is huge. Biaxially oriented polyester film, or BOPET, is a comprehensive packaging film: it has high mechanical strength, good rigidity, resistance to folding, and is transparent and shiny. [0003] At present, PVDC polyester coating film has good oxygen barrier and moisture barri...

Claims

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Application Information

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IPC IPC(8): C09D133/12C09D7/61C09D7/20C08F220/14C08F220/20
CPCC08F220/14C08K2201/011C09D7/20C09D7/61C09D7/70C09D133/12C08K7/00C08K3/346C08K3/042C08F220/20
Inventor 白永平张建平李卫东殷晓芬
Owner HARBIN INST OF TECH WUXI RES INST OF NEW MATERIALS
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