A kind of thermoplastic polyvinyl alcohol resin and preparation method thereof

A technology of polyvinyl alcohol resin and polyvinyl alcohol, which is applied in the field of water-soluble thermoplastic polyvinyl alcohol resin and its preparation at room temperature, and can solve the problem of non-environmental protection of thermoplastic polyvinyl alcohol resin, yellowing of modified polyvinyl alcohol resin, and affecting products Quality and other issues, to achieve the effect of good resin lubricity, high decomposition temperature, and environmental protection

Active Publication Date: 2018-08-31
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The blending modification process is relatively simple, and there are many domestic researches. Some blending systems are toxic, and the resulting thermoplastic polyvinyl alcohol resin is not environmentally friendly. Its weather resistance is not good, it is easy to absorb moisture, and it is easy to decompose during thermoplastic processing. Cause the color of modified polyvinyl alcohol resin to turn yellow, affect the final product quality, the current thermoplastic polyvinyl alcohol resin and its preparation method can not meet the actual needs

Method used

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  • A kind of thermoplastic polyvinyl alcohol resin and preparation method thereof
  • A kind of thermoplastic polyvinyl alcohol resin and preparation method thereof
  • A kind of thermoplastic polyvinyl alcohol resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: 50 parts of polyvinyl alcohol (polymerization degree 1000, degree of alcoholysis 72.0 (mol) %), 40 parts of polyethylene glycols, 20 parts of soft water, 0.1 part of oleic acid amide are mixed under stirring state, at 30 ℃ temperature with stirring while heating, stop heating after 10 minutes. 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 120°C, melt and extrude under normal pressure, then cool the material to 20°C, and cut The thermoplastic polyvinyl alcohol resin is obtained by granulating and molding with a granulator.

[0037]The decomposition temperature of the obtained thermoplastic polyvinyl alcohol resin is 260°C, the resin is colorless and transparent, does not turn yellow, the melting temperature is 140°C, the melting index is 5g / 10min (140°C / 2.16~10kg), the resin is granular, and the water dissolution temperature is 20-30°C.

Embodiment 2

[0038] Embodiment 2: 55 parts of polyvinyl alcohol (polymerization degree 1000, degree of alcoholysis 80.0 (mol) %), 37 parts of glycerol, 18 parts of soft water, 0.5 part of silicon dioxide are mixed, mix under stirring state, in Heat at 40°C while stirring, and stop heating after 30 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 130°C, melt and extrude under the pressure of 0.01MPa (gauge pressure), and then cool the material To 30 ℃, the thermoplastic polyvinyl alcohol resin is obtained by cutting into pellets with a pelletizer.

[0039] The decomposition temperature of the obtained resin is 265°C, the melting temperature is 130°C, the melt index is 4g / 10min (140°C / 2.16-10kg), the resin is a cylinder with a diameter of 2.0mm and a height of 0.5mm, and the water dissolution temperature is 15-30°C.

Embodiment 3

[0040] Embodiment 3: 40 parts of conventional polyvinyl alcohol (polymerization degree 1500, degree of alcoholysis 88.0 (mol) %), 32 parts of triethylene glycol diisocaprylate, 17 parts of soft water, 1 part of talcum powder are mixed, in stirring state Mix evenly under low temperature, heat while stirring at a temperature of 50°C, and stop heating after 60 minutes. Then put the material into the silo with stirring, and use a single screw to automatically transport the material to the single-screw extruder, keep the screw temperature at 130°C, melt and extrude it under normal pressure, and then cool the material to 35°C, The thermoplastic polyvinyl alcohol resin is obtained by pelletizing with a pelletizer.

[0041] The decomposition temperature of the obtained resin is 270°C, the melting temperature is 145°C, the melt index is 5g / 10min (140°C / 2.16-10kg), the resin is in the shape of a cube, and the water dissolution temperature is 20-35°C.

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Abstract

A normal temperature water-soluble thermoplastic polyvinyl alcohol resin, which is composed of effective doses of polyvinyl alcohol, plasticizer, soft water and processing aids, the degree of polymerization of the polyvinyl alcohol is 1000-2400, 72 (mol)% ≤ degree of alcoholysis <90 (mol)%, the plasticizer is at least one of glycerol, polyethylene glycol, and triethylene glycol diisocaprylate, and the processing aid is talcum powder, At least one of silicon oxide, oleic acid amide, and saturated aliphatic dicarboxylic acid ester. Thermoplastic polyvinyl alcohol resin has a melting temperature of 120-180°C, dissolves in water at 15-40°C, and has a decomposition temperature above 260°C. It is colorless, transparent, and non-yellowing, with excellent quality.

Description

technical field [0001] The invention relates to a thermoplastic polyvinyl alcohol resin, in particular to a normal temperature water-soluble thermoplastic 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 ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L71/08C08K13/02C08K5/053C08K5/103C08K3/34C08K3/36C08K5/20C08K5/098C08K3/38C08K3/16B29C47/92
Inventor 吴春林廖永康黎园雷德松
Owner CHINA PETROCHEMICAL CORP
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