EVOH (ethylene vinyl alcohol) resin and preparation method thereof

A resin and polyolefin resin technology, applied in the field of resin and resin preparation, can solve the problems of difficult production and complicated EVOH resin processing process, and achieve the prevention of yellowing, carbonization and degradation, excellent gas barrier properties, and good thermoplastic processability Effect

Active Publication Date: 2011-11-02
WEIFANG HUAWEI MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a kind of EVOH resin and the preparation method of EVOH resin

Method used

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  • EVOH (ethylene vinyl alcohol) resin and preparation method thereof
  • EVOH (ethylene vinyl alcohol) resin and preparation method thereof
  • EVOH (ethylene vinyl alcohol) resin and preparation method thereof

Examples

Experimental program
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specific Embodiment approach 1

[0021] Specific embodiment one: In this embodiment, the EVOH resin consists of 45-100 parts of polyvinyl alcohol, 5-35 parts of plasticizer, 5-35 parts of ethylenically unsaturated monomer, 0-25 parts of maleic anhydride grafted polyolefin resin, 0.01-2 parts of initiator, 0.01-2 parts of catalyst, 0.1-3 parts of antioxidant and 0.01-3 parts of surfactant; It is prepared by blending 0.01-0.5 parts by mass of trimethylolpropane and 0.1-5 parts by mass of ester at 60°C-130°C for 1-5 hours; the ester is citric acid Triethyl Ester, Acetyl Triethyl Citrate, Tributyl Citrate, Acetyl Tris(2-Ethylhexyl) Citrate, Acetyl Tris(n-octyldecyl) Citrate, Diethylene Glycol Dibenzoate , Dipropylene Glycol Dibenzoate, Dihydroxymethylpropane, Trimethylolpropane, Tetramethylolpropane, Trimethylolethane Tribenzoate, Propylene Glycol, Glycerin, N-Ethyl Ortho A mixture of two or more of p-toluenesulfonamide, N-butylphenylsulfonamide, dioctyl sebacate, diisodecyl phthalate and diisononyl phthalate. ...

specific Embodiment approach 2

[0023] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the degree of alcoholysis of polyvinyl alcohol is 88% mol ~ 99.8% mol, the degree of polymerization is 1500 ~ 3000, the volatile content is ≤ 7.0%, and the ash content is ≤ 3.0 %, PH value is 5-7. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0024] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the ethylenically unsaturated monomer is ethyl acetate, methyl acetate, ethyl trimethyl acetate, itaconic acid, dimethyl itaconate , diethyl itaconate, acrylamide, phthalic acid, methyl acrylate, dioctyl maleate, vinyl acetate, caprolactam, sebacic acid, aminododecanoic acid, vinyl formate, difumarate Butyl, Propylene Vinyl, Vinyl Laurate, Vinyl Stearate, Styrene Alkyl Acrylate, Styrene, Butadiene, Hexamethylene Diamine, Adipic Acid, Dodecanedioic Acid, Dodecane Di acid or aminoundecanoic acid. Others are the same as in the first embodiment.

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Abstract

The invention discloses an EVOH (ethylene vinyl alcohol) resin and a preparation method thereof and relates to a resin and a preparation method thereof, and the method provided by the invention can be used for solving the problems of complex process for the production of the EVOH resin and large production difficulty in traditional methods. The EVOH resin is prepared through the following steps: stirring polyvinyl alcohol, a plasticizer, an ethylene unsaturated monomer, maleic anhydride graft polypropylene resin, an initiator, a catalyst, an anti-yellowing agent and a surfactant, and then pelletizing the mixture in a double-screw extruder. The method provided by the invention is simple in process and small in equipment investment, and the EVOH resin has the advantage of stable quality.

Description

technical field [0001] The invention relates to a resin and a preparation method of the resin. Background technique [0002] As a high barrier material, EVOH (ethylene-vinyl alcohol copolymer) has been widely used in the market and recognized by users. Its barrier property is better than PVDC (polyvinylidene chloride) and MXD6 ( aromatic polyamide). However, so far only Japan's Kuraray Corporation, Japan's Synthetic Chemicals and Taiwan's Changchun Chemical, which has recently been put on the market, can produce. Its selling price is extremely expensive. Due to its complex processing process, high production difficulty and large investment in equipment, people and enterprises interested in EVOH resin are daunted. [0003] Ethylene-vinyl alcohol resin was first obtained by American DuPont Company through copolymerization and alcoholysis. It is an alcoholysis product of ethylene-vinyl acetate copolymer. The process uses tert-butanol as a solvent, removes tert-butanol, dri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/00C08L51/06C08L51/08C08K5/11C08K5/12C08F261/04
Inventor 朱鹏涛
Owner WEIFANG HUAWEI MATERIALS TECH CO LTD
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