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Water-soluble composite containing thermoplastic PVA (polyvinyl alcohol) and preparation method of water-soluble composite containing thermoplastic PVA

A technology of polyvinyl alcohol and polyvinyl alcohol resin, which is applied in the field of compound preparation, can solve problems such as poor melt fluidity, achieve low crystallinity, high decomposition temperature, and improve the effect of HLB value

Active Publication Date: 2017-10-20
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since blending modified PVA resin is to select small molecular compounds or oligomers with complementary structures to PVA for blending and plasticizing modification, it is a physical modification of PVA without changing the molecular structure. Therefore, blending modification Permanent PVA resin still has high crystallinity and poor melt fluidity, which limits its application in many fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1, a thermoplastic polyvinyl alcohol water-soluble compound, in the form of fine particles, with a particle size of 180-200 mesh, composed of thermoplastic polyvinyl alcohol resin and linear random polymer, thermoplastic polyvinyl alcohol resin and linear random polymer The weight ratio of the material is 80:20.

[0027] The thermoplastic polyvinyl alcohol resin is preferably water-soluble polyvinyl alcohol resin at normal temperature, its water-soluble temperature is 25-30°C, its degree of alcoholysis is 70-92mol / mol, and its degree of polymerization is between 300-2000. Thermoplastic polyvinyl alcohol resin is composed of polyvinyl alcohol PVA and plasticizer. The weight ratio of polyvinyl alcohol PVA to plasticizer is 50:50. The plasticizer is glycerol, polyethylene glycol, water, starch One of.

[0028] The melt index of thermoplastic polyvinyl alcohol resin is 1-10g / 10min, and the melting point is between 120-200°C; the linear random polymer is polyethylen...

Embodiment 2

[0039] Example 2 differs from Example 1 in that the particle size of the thermoplastic polyvinyl alcohol water-soluble compound is 40-60 mesh. The weight ratio of thermoplastic polyvinyl alcohol resin to linear random polymer is 99.9:0.1.

[0040] The weight ratio of polyvinyl alcohol to plasticizer is 90:10, and the plasticizer is two kinds of glycerol, polyethylene glycol, starch, and water in a ratio of 2:1.

Embodiment 3

[0041] Example 3. The difference from Example 1 is that the particle size of the thermoplastic polyvinyl alcohol water-soluble compound is 100-120 mesh. The weight ratio of thermoplastic polyvinyl alcohol resin to linear random polymer is 90:10.

[0042] The weight ratio of polyvinyl alcohol to plasticizer is 90:10, and the plasticizer is glycerol, polyethylene glycol, water and starch and is combined in a ratio of 2:1:1.

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Abstract

A water-soluble composite containing thermoplastic PVA (polyvinyl alcohol) is finely particulate, the particle size is 0.0015-2.0 mm, and the composite is prepared from thermoplastic PVA resin and a linear random polymer in a weight ratio of (80-99.9): (0.1-20). The water-soluble composite containing thermoplastic PVA is characterized in that the melt index is 8-35 g / 10 min, the melt temperature is 120-280 DEG C, and the water solution temperature is 20-80 DEG C. The water-soluble composite has lower crystallinity and excellent melt processing fluidity, overcomes defects of high crystallinity and poor melt flowability of existing blended modified PVA resin, and a preparation method is simple and easy to implement.

Description

technical field [0001] The invention relates to a thermoplastic polyvinyl alcohol water-soluble compound, and also relates to a preparation method of the compound. Background technique [0002] Polyvinyl alcohol is a water-soluble polymer material with excellent performance and a wide range of uses. It is mainly used as auxiliary materials such as adhesives and dispersants. PVA has biodegradability and barrier properties. Blending and modifying PVA with plasticizer can lower the melting point, increase the decomposition temperature, and realize the application performance of PVA as a plastic. The blended modified PVA resin can be directly used in plastic processing fields such as thermoplastic blown film, thermoplastic extrusion cast film, injection molding, etc. The prepared PVA film or profile has excellent mechanical properties and barrier properties, and is used in pesticides, etc. It is widely used in the packaging of toxic substances, transportation of special items s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L23/06C08L23/12C08L71/08C08L3/02C08K5/053
CPCC08L29/04C08L2203/12C08L2205/035C08L23/06C08L71/00C08L3/02C08K5/053C08L23/12
Inventor 吴春林黎园范金华雷德松胡腊梅
Owner CHINA PETROCHEMICAL CORP
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