Thermoplastic modified polyvinyl alcohol resin and preparation method thereof

A technology of polyvinyl alcohol resin and polyvinyl alcohol, which is applied in the field of thermoplastic vinyl modified polyvinyl alcohol resin and its preparation, can solve the problems of reducing hydrogen bond force, complicated modification process, and difficult industrialization, and achieves decomposition Increased temperature, good compatibility, and reduced melting temperature

Active Publication Date: 2016-03-30
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The introduction of a relatively large amount of comonomer can effectively reduce the hydrogen bond force in polyvinyl alcohol molecules, and clearly separate the melting temperature from the decomposition temperature, such as EVOH resin, but the modification process is complicated and industrialization is difficult
In the existing production process of polyvinyl alcohol, a small amount of modified monomer is introduced in the polymerization process, and the melting temperature is lowered, but it still cannot be processed separately

Method used

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  • Thermoplastic modified polyvinyl alcohol resin and preparation method thereof
  • Thermoplastic modified polyvinyl alcohol resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: with 63 parts of vinyl-modified polyvinyl alcohol (this vinyl-modified polyvinyl alcohol is obtained through alcoholysis after the copolymerization of vinyl acetate monomer and butene monomer, and its degree of alcoholysis is 90 (mol )%, the degree of polymerization is 2000, the modified amount of butene monomer is 0.1~1(mol)%), 12 parts of glycerol, 10 parts of triethylene glycol diisocaprylate, 12 parts of soft water, 7 parts of mustard Mix acid amide and 2 parts of saturated aliphatic dicarboxylic acid ester G60 evenly under stirring, heat while stirring at 45°C, and stop heating after 2 hours. Then put the material into the silo with stirring, use the screw to automatically transport the material to the screw extruder, keep the screw temperature at 160°C, melt and extrude under normal pressure, then cool the material to 30°C, and cut The thermoplastic vinyl modified polyvinyl alcohol resin is obtained by granulating and molding with a granulator.

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Embodiment 2

[0037] Embodiment 2: with 52 parts of vinyl-modified polyvinyl alcohol (this vinyl-modified polyvinyl alcohol is obtained through alcoholysis after the copolymerization of vinyl acetate monomer and propylene monomer, and its degree of alcoholysis is 80.0 (mol) %, the degree of polymerization is 3000, the modified amount of propylene monomer is 16~20 (mol)%), 3 parts of glycerol, 2 parts of polyethylene glycol, 1 part of triethylene glycol diisocaprylate, 7 parts Mix soft water and 0.5 parts of silicon dioxide, mix evenly under stirring, heat while stirring at a temperature of 30°C, stop heating after 10 minutes. Then put the material into the silo with stirring, use the screw to automatically transport the material to the single-screw extruder, keep the screw temperature at 180°C, melt and extrude under the pressure of 0.01MPa (gauge pressure), and then cool the material To 40 ℃, through pelletizer pelletizing and molding to obtain thermoplastic vinyl modified polyvinyl alcoho...

Embodiment 3

[0039] Embodiment 3: 83 parts of vinyl-modified conventional polyvinyl alcohols (this vinyl-modified polyvinyl alcohol is obtained through alcoholysis after the copolymerization of vinyl acetate monomer and vinyl monomer, and its degree of alcoholysis is 99.9 (mol )%, the degree of polymerization is 1000, the modification amount of vinyl monomer is 8~12 (mol)%), 38 parts of triethylene glycol diisocaprylate, 20 parts of soft water, 11 parts of talcum powder, 4 parts of erucamide Mix, mix evenly under stirring, heat at 90°C while stirring, stop heating after 6h. Then put the material into the silo with stirring, and use a single screw to automatically transport the material to a single-screw extruder, keep the screw temperature at 190°C, melt and extrude it under normal pressure, and then cool the material to 20°C, The thermoplastic vinyl modified polyvinyl alcohol resin is obtained by pelletizing and molding with a pelletizer.

[0040] The decomposition temperature of the obt...

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Abstract

The invention discloses thermoplastic modified polyvinyl alcohol resin. The thermoplastic modified polyvinyl alcohol resin comprises vinyl-modified polyvinyl alcohol, a plasticizer, soft water and a processing auxiliary agent. The vinyl-modified polyvinyl alcohol is obtained by copolymerization of a vinyl acetate monomer and an unsaturated monomer containing vinyl and then alcoholysis and has an alcoholysis degree of 80.0-99.9(mol)%, a polymerization degree of 1000-3000 and a vinyl-containing unsaturated monomer modification amount of 0.1-20(mol)%. The plasticizer is at least one of glycerol, polyethylene glycol and triethylene glycol di-2-ethylhexoate. The processing auxiliary agent is at least one of talcum powder, silica, erucyl amide and saturated aliphatic dicarboxylic acid ester. The thermoplastic vinyl-modified polyvinyl alcohol resin has a melting temperature of 160-220 DEG C and a decomposition temperature of 320 DEG C or more, is colorless and transparent, does not produce yellowing and has excellent quality.

Description

technical field [0001] The invention relates to a modified polyvinyl alcohol resin, in particular to a thermoplastic vinyl modified polyvinyl alcohol resin and a preparation method thereof. Background technique [0002] Polyvinyl alcohol (PVA) is a polymer material with excellent performance and a wide range of uses. Because polyvinyl alcohol has the structural characteristics of polyhydric groups and strong hydrogen bonds, it has many excellent properties and is widely used in coatings, adhesives, etc. agent, paper sizing agent and other fields. The use of polyvinyl alcohol resin to prepare films or profiles is a new direction for the application of polyvinyl alcohol resins. Films or profiles made of PVA have excellent oxygen resistance, oil resistance, no static electricity, no dust absorption, and high strength. And under certain conditions, it has water solubility and biodegradability. Therefore, the film or profile made of polyvinyl alcohol is expected to play an impor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08F218/08C08F8/00C08K5/053C08K5/103C08K3/34C08K3/36C08K5/20C08K5/11B29B9/06B29C47/92B29C48/92
Inventor 吴永忠吴春林黎园胡腊梅范金华
Owner CHINA PETROCHEMICAL CORP
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