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Calcium sulfate whisker modified polypropylene composite material and preparation method thereof

A technology of calcium sulfate whisker and composite material, which is applied in the field of calcium sulfate whisker modified polypropylene composite material and its preparation, can solve the problems of high brittleness, large shrinkage, low notched impact strength and the like, and achieves high impact strength, Fast crystallization rate and good toughness

Active Publication Date: 2011-11-09
XIANGFU NEW BUILDING MATERIAL HUNAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polypropylene currently on the market has high molding shrinkage, high brittleness, and low notched impact strength, especially at low temperatures, which greatly limits the further promotion and application of polypropylene.

Method used

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  • Calcium sulfate whisker modified polypropylene composite material and preparation method thereof
  • Calcium sulfate whisker modified polypropylene composite material and preparation method thereof
  • Calcium sulfate whisker modified polypropylene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The calcium sulfate whisker modified polypropylene composite material in this example is made of the following raw materials in parts by weight: 100 parts of PP, 10 parts of calcium sulfate whiskers, 20 parts of SBS, 15 parts of EVA, 0.1 part of DVB, 1 part of benzohydrazine parts, 2 parts of titanate coupling agent.

[0016] Preparation:

[0017] (1) Add calcium sulfate whiskers and titanate coupling agent into a high-speed mixer and mix for 10 minutes to obtain modified calcium sulfate whiskers; modified calcium sulfate whiskers have an aspect ratio of 24 and an average diameter of 2.8 ;

[0018] (2) Add the polypropylene, styrene-butadiene block copolymer, ethylene-vinyl acetate copolymer, divinylbenzene, and benzohydrazide into a high-speed mixer, and mix at 60°C for 7 minutes to obtain A mixture of polypropylene, styrene-butadiene block copolymer, ethylene-vinyl acetate copolymer, divinylbenzene, benzohydrazide and modified calcium sulfate whiskers;

[0019] (3...

Embodiment 2

[0022] The calcium sulfate whisker modified polypropylene composite material in this example is made of the following raw materials in parts by weight: 100 parts of PP, 15 parts of calcium sulfate whisker, 20 parts of SBS, 20 parts of EVA, 0.1 part of DVB, 1 part of benzohydrazine parts, 2 parts of titanate coupling agent.

[0023] Preparation:

[0024] (1) Add calcium sulfate whiskers and titanate coupling agent into a high-speed mixer and mix for 10 minutes to obtain modified calcium sulfate whiskers; modified calcium sulfate whiskers have an aspect ratio of 25 and an average diameter of 2.8 ;

[0025] (2) Add the polypropylene, styrene-butadiene block copolymer, ethylene-vinyl acetate copolymer, divinylbenzene, and benzohydrazide into a high-speed mixer, and mix at 60°C for 7 minutes to obtain A mixture of polypropylene, styrene-butadiene block copolymer, ethylene-vinyl acetate copolymer, divinylbenzene, benzohydrazide and modified calcium sulfate whiskers;

[0026] (3)...

Embodiment 3

[0029] The calcium sulfate whisker modified polypropylene composite material in this example is made of the following raw materials in parts by weight: 100 parts of PP, 20 parts of calcium sulfate whisker, 10 parts of SBS, 15 parts of EVA, 0.1 part of DVB, and 1 part of benzohydrazide , 2 parts of titanate coupling agent.

[0030] Preparation:

[0031] (1) Add calcium sulfate whiskers and titanate coupling agent into a high-speed mixer and mix for 10 minutes to obtain modified calcium sulfate whiskers; modified calcium sulfate whiskers have an aspect ratio of 25 and an average diameter of 3 ;

[0032] (2) Add the polypropylene, styrene-butadiene block copolymer, ethylene-vinyl acetate copolymer, divinylbenzene, and benzohydrazide into a high-speed mixer, and mix at 60°C for 7 minutes to obtain A mixture of polypropylene, styrene-butadiene block copolymer, ethylene-vinyl acetate copolymer, divinylbenzene, benzohydrazide and modified calcium sulfate whiskers;

[0033] (3) Th...

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Abstract

The invention discloses a calcium sulfate whisker modified polypropylene composite material and a preparation method thereof. The calcium sulfate whisker modified polypropylene composite material is prepared from the following raw materials in part by weight: 100 parts of polystyrene (PP), 10 to 40 parts of calcium sulfate whisker, 10 to 20 parts of styrene butadiene styrene (SBS), 10 to 20 partsof ethylene vinyl acetate (EVA), 0.1 to 0.3 part of divinylbenzene (DVB), 0.5 to 2 parts of benzoyl hydrazine and 1 to 3 parts of titanate coupling agent. The preparation method comprises the following steps of: mixing the calcium sulfate whisker and the titanate coupling agent in a high speed mixer for 5 to 12 minutes; mixing other raw materials and the modified calcium sulfate whisker in the high speed mixer for 5 to 10 minutes; and extruding and pelletizing the obtained mixture in a double-screw extruder. The calcium sulfate whisker modified polypropylene composite material has high impactstrength and toughness, and is particularly suitable for manufacturing various electrical equipment shells requiring high strength.

Description

technical field [0001] The invention relates to a polypropylene composite material and a preparation method thereof, in particular to a calcium sulfate whisker modified polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene (PP) is one of the most widely used general-purpose plastics in the world. It has the advantages of low density, good chemical corrosion resistance, insect resistance, low price, and excellent comprehensive physical and mechanical properties. However, the polypropylene currently on the market has high molding shrinkage, high brittleness, and low notched impact strength, especially at low temperatures, which greatly limits the further promotion and application of polypropylene. Therefore, the strengthening and toughening modification of PP has been extensively and deeply studied at home and abroad. Contents of the invention [0003] The technical problem to be solved by the present invention is to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L53/02C08L23/08C08L31/04C08K13/06C08K9/04C08K7/08C08K5/01C08K5/25B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
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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