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Calcium sulfate whisker modified polyvinylalcohol composite material and preparation process thereof

A technology of calcium sulfate whisker and polyvinyl alcohol, which is applied in the field of calcium sulfate whisker modified polyvinyl alcohol composite material and its preparation process, and achieves the effects of simple preparation process, good heat resistance and oxygen barrier, and high strength

Active Publication Date: 2011-07-27
XIANGFU NEW BUILDING MATERIAL HUNAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of existing polyvinyl alcohol materials, and provide a calcium sulfate whisker with high strength, low notch sensitivity, good heat resistance and oxygen resistance, simple preparation process and low cost Modified polyvinyl alcohol composite material and its preparation process

Method used

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  • Calcium sulfate whisker modified polyvinylalcohol composite material and preparation process thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The calcium sulfate whisker modified polyvinyl alcohol composite material in this embodiment is made of the following raw materials in parts by weight: 83 parts of polyvinyl alcohol, 10 parts of calcium sulfate whisker with a diameter of 10-20 μm, and the surface modifier stearic acid 2 parts, plasticizer DBP 4 parts, lubricant paraffin 1 part.

[0020] Preparation:

[0021] (1) Add calcium sulfate whiskers and surface modifier stearic acid into a high-speed mixer, and mix for 10 minutes to obtain modified calcium sulfate whiskers;

[0022] (2) Add polyvinyl alcohol, plasticizer DBP and lubricant paraffin into a high-speed mixer, and mix for 5 minutes to obtain a mixture of polyvinyl alcohol, plasticizer DBP, lubricant paraffin and modified calcium sulfate whiskers;

[0023] (3) Extrude the mixture obtained in step (2) in a co-rotating parallel twin-screw extruder and granulate. The process parameters are as follows: the temperature in the first zone is 115°C, the temp...

Embodiment 2

[0027] The calcium sulfate whisker modified polyvinyl alcohol composite material in this example is made of the following raw materials in parts by weight: 78 parts of polyvinyl alcohol, 15 parts of calcium sulfate whisker with a diameter of 10-20 μm, and the surface modifier sodium laurate 2 parts, 4 parts of plasticizer DOP, 1 part of lubricant stearic acid.

[0028] Preparation:

[0029] (1) Add calcium sulfate whiskers and surface modifier sodium laurate into a high-speed mixer and mix for 10 minutes to obtain modified calcium sulfate whiskers;

[0030] (2) Add polyvinyl alcohol, plasticizer DOP and lubricant stearic acid into a high-speed mixer and mix for 5 minutes to obtain polyvinyl alcohol, plasticizer DOP, lubricant stearic acid and modified calcium sulfate crystals a mixture of whiskers;

[0031] (3) Extrude the mixture obtained in step (2) in a co-rotating parallel twin-screw extruder and granulate. The process parameters are as follows: the temperature in the fi...

Embodiment 3

[0035] The calcium sulfate whisker-modified polyvinyl alcohol composite material in this example is made of the following raw materials in parts by weight: 73 parts of polyvinyl alcohol, 20 parts of calcium sulfate whiskers with a diameter of 10-20 μm, and the surface modifier stearic acid 2 parts, plasticizer epoxidized soybean oil 4 parts, lubricant butyl stearate 1 part.

[0036] Preparation:

[0037] (1) Add calcium sulfate whiskers and surface modifier stearic acid into a high-speed mixer, and mix for 10 minutes to obtain modified calcium sulfate whiskers;

[0038] (2) Add polyvinyl alcohol, plasticizer epoxy soybean oil and lubricant butyl stearate into a high-speed mixer, and mix for 5 minutes to obtain polyvinyl alcohol, plasticizer epoxy soybean oil, lubricant hard A mixture of butyl fatty acid ester and modified calcium sulfate whiskers;

[0039] (3) Extrude the mixture obtained in step (2) in a co-rotating parallel twin-screw extruder and granulate. The process pa...

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Abstract

The invention relates to a calcium sulfate whisker modified polyvinylalcohol composite material and a preparation process thereof. The composite material is prepared by the following materials according to part by weight: 70 to 90 portions of polyvinyl alcohol, 10 to 20 portions of calcium sulfate whisker with the diameter of 10 to 20 Mum, 1 to 3 portions of surface modifier, 1 to 5 portions of plasticizer, and 0.5 to 1.5 portions of lubricant. The preparation method comprises the following steps: adding the calcium sulfate whisker and the surface modifier to a high-speed mixer to mix for 5 to 15 minutes; then adding the polyvinyl alcohol, the plasticizer and the lubricant to the high-speed mixer to mix for 3 to 7 minutes; extruding the mixture from an equidirectional parallel double-screw extruder for granulation; and then conducting injection molding to the particles in an equidirectional parallel double-screw injection machine. The calcium sulfate whisker modified polyvinylalcohol composite material has high strength, low notch sensitivity, good thermal resistance and oxygen resistance, simple preparation process, and low cost, and is especially suitable for making products such as films and the like.

Description

technical field [0001] The invention relates to a polyvinyl alcohol composite material and a preparation process thereof, in particular to a calcium sulfate whisker-modified polyvinyl alcohol composite material and a preparation process thereof. Background technique [0002] Polyvinyl alcohol (PVA) is a water-soluble polymer with a wide range of uses. It has good water solubility, cohesive force, emulsification and excellent oil resistance and solvent resistance. It has good fiber-forming and film-forming properties, high film transparency, easy coloring, oxygen resistance, antistatic properties, toughness and chemical resistance. Excellent performance. However, PVA has poor water resistance, high hygroscopicity, difficult melt processing, and low thermal stability. After moisture absorption, the strength of PVA is only 55% to 60% of the strength of PVA without moisture absorption, and the oxygen barrier property of the film also decreases. Contents of the invention [...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08K9/04C08K7/08C08K3/30B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/875B29C48/92B29C2948/92704B29C2948/92895B29C2948/92904
Inventor 刘珍如刘立文付桃梅杨志强宁勇鲁纪鸣
Owner XIANGFU NEW BUILDING MATERIAL HUNAN
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