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Polyvinyl alcohol matte film, its composition and preparation method

A technology of polyvinyl alcohol and its composition, which is applied in the field of polyvinyl alcohol matte film and its composition and preparation, and can solve problems such as rising costs, increased processes, loss of film transparency, etc.

Active Publication Date: 2022-01-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional matte methods such as using secondary processing methods such as roller flower, solvent and chemical corrosion to improve the surface scattering of the film, but the secondary processing will increase the process and increase the cost; or add graphite and SiO 2 Other light-absorbing and matting substances, but usually cause complete loss of film transparency

Method used

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  • Polyvinyl alcohol matte film, its composition and preparation method
  • Polyvinyl alcohol matte film, its composition and preparation method

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preparation example Construction

[0025] According to the present invention, the olefin-maleic anhydride copolymer microspheres can be prepared by conventional methods in the art, for example, it can be prepared with reference to the method in CN100579995C, and the preparation method of the olefin-maleic anhydride copolymer microspheres can include : Under nitrogen protection, in an organic solvent, and in the presence of a free radical initiator, olefin and maleic anhydride are carried out to copolymerization; the product of the copolymerization is centrifuged to obtain the olefin-maleic anhydride of the present invention Copolymer microspheres.

[0026] According to the present invention, the free radical initiator is preferably dibenzoyl peroxide, dicumyl peroxide, ditert-butyl peroxide, lauryl peroxide, tert-butyl peroxybenzoate, dibutyl peroxide At least one of diisopropyl carbonate, dicarbodicyclohexyl peroxide, azobisisobutyronitrile and azobisisoheptanonitrile. More preferably, the initiator is azobis...

preparation example 1

[0081] 34.8kg of mixed C4A is passed into 200L of organic reaction solution containing 10kg maleic anhydride, 0.164kg azobisisobutyronitrile (consumption is 1.0mol% of maleic anhydride) and 100L isoamyl acetate Carry out free radical copolymerization reaction in the kettle, the copolymerization reaction pressure is 0.9MPa, the copolymerization reaction temperature is 70°C, and the copolymerization reaction time is 6h; the product of the copolymerization reaction is sent to a centrifugal separator, and the liquid-solid reaction is performed at 4000rpm and centrifuged for 20min. Separation to obtain solid copolymer powder, that is, olefin-maleic anhydride copolymer microspheres A1, with a molecular weight of 22,000 Daltons and a particle size of 400-1000 nm.

preparation example 2

[0083] The styrene of 6.24kg is joined in the 200L reactor that fills 5.88kg maleic anhydride, dibenzoyl peroxide (consumption is 0.3mol% of maleic anhydride) and the organic reaction solution of 120L isoamyl acetate Free radical copolymerization reaction, the copolymerization reaction pressure is 1MPa, the copolymerization reaction temperature is 80°C, and the copolymerization reaction time is 6h; the product of the copolymerization reaction is sent to a centrifugal separator, and the liquid-solid separation is carried out at 4000rpm and centrifuged for 20min to obtain a solid The copolymer powder is olefin-maleic anhydride copolymer microspheres A2, the molecular weight is 100,000 Dalton, and the particle size is 300-600nm.

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Abstract

The invention relates to the field of polyvinyl alcohol films, in particular to polyvinyl alcohol matte films, compositions and preparation methods thereof. The polyvinyl alcohol composition contains polyvinyl alcohol, a plasticizer, olefin-maleic anhydride copolymer microspheres, a lubricant and optional auxiliary agents; the plasticizer contains component A, component B and component C; the component A is one or more of glycerol, ethylene glycol, polyethylene glycol and pentaerythritol; the component B is magnesium chloride, magnesium nitrate, calcium chloride, copper sulfate and sodium acetate One or more; the component C is water. The present invention can make polyvinyl alcohol with a wide range of alcoholysis degree to be biaxially stretched into a film, and the obtained polyvinyl alcohol matte film has a matte effect, and also has suitable mechanical strength, surface wetting tension and Translucency.

Description

technical field [0001] The invention relates to the field of polyvinyl alcohol films, in particular to polyvinyl alcohol matte films, compositions and preparation methods thereof. Background technique [0002] Polyvinyl alcohol (PVA) is one of the few non-petroleum-based polymer materials that has been industrially produced and can be prepared from natural gas. Its applications cover textiles, food, medicine, construction, wood processing, paper, printing, agriculture, steel, Polymer chemical industry and other fields. PVA has excellent acid and alkali resistance and organic solvent resistance, has excellent barrier properties, good biocompatibility, and is biodegradable. However, due to the presence of polyhydroxyl structures in the molecular chain, strong hydrogen bonds are generated within and between molecules, resulting in its melting point and decomposition temperature being close, making it difficult to process thermoplastics. Therefore, its application is currently ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L27/16C08L23/20C08L71/02C08L35/00C08L25/08C08K13/02C08K3/28C08K3/16C08K5/053C08K3/18C08K3/30C08K5/098B29C69/02B29L7/00
Inventor 解娜张师军徐萌初立秋张丽英高达利尹华徐凯董穆权慧
Owner CHINA PETROLEUM & CHEM CORP
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