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Calcium carbonate filler master batch for polypropylene and polyethylene and preparation process thereof

A technology of calcium carbonate filler and polyethylene, which is applied in the field of high polymer processing aids, can solve the problems of inability to form a good and stable interface layer material performance, weak binding force between calcium carbonate and matrix, and influence of calcium carbonate on product performance, etc., to achieve Effects of low cost, reduced adverse effects, and improved notched impact strength and wear resistance

Active Publication Date: 2013-10-23
JIANDE XINYU PLASTIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of easy agglomeration encountered when calcium carbonate filler is added to polypropylene, polyethylene and other high polymers, and the weak binding force between calcium carbonate and matrix causes product performance to be greatly affected by calcium carbonate and existing Calcium carbonate surface modification has a single effect, cannot form a good and stable interfacial layer, and cannot improve material properties stably

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First, prepare functional modified calcium carbonate whiskers:

[0023] 1) Calcium carbonate whiskers with a diameter of 0.5μm are placed in water 3 times the weight of calcium carbonate whiskers to form a suspension, and sodium stearate is added to the suspension with 2% by weight of calcium carbonate whiskers. Stir at 50°C for 30min, dry with hot air and make the water content of calcium carbonate whiskers <1;

[0024] 2) In step 1), the final product is placed in n-hexane 3 times the weight of calcium carbonate whiskers, and 1% by weight of calcium carbonate whiskers silane coupling agent, 5% of organic rare earth (maleic acid mono Ester rare earth,), stir at 85℃ for 30min, remove the n-hexane;

[0025] 3) Add 0.6% by weight of organic acid to the product obtained in step 2) in the stirring process by spraying, and then dry it with hot air at 90°C for 5 hours to obtain functionally modified calcium carbonate whiskers.

[0026] Then, mix the calcium carbonate filler masterba...

Embodiment 2

[0029] First, prepare functional modified calcium carbonate whiskers:

[0030] 1) Calcium carbonate whiskers with a diameter of 0.8μm are placed in water 5 times the weight of calcium carbonate whiskers to form a suspension, and sodium stearate with 0.3% by weight of calcium carbonate whiskers is added to the suspension. Stir at 60°C for 40 minutes, dry with hot air and make the water content of calcium carbonate whiskers <1;

[0031] 2) In step 1), the final product is placed in n-hexane with 1 times the weight of calcium carbonate whiskers, and 2% by weight of calcium carbonate whiskers silane coupling agent and 8% of organic rare earth (rare earth nitrate) are added. Stir at 60°C for 50 minutes to remove n-hexane;

[0032] 3) The product obtained in step 2) is added with 1% by weight of organic acid during the stirring process by spraying, and then dried with hot air at 70°C for 8 hours to obtain functionally modified calcium carbonate whiskers.

[0033] Then, mix the calcium carb...

Embodiment 3

[0036] First, prepare functionally modified calcium carbonate whiskers:

[0037] 1) Calcium carbonate whiskers with a diameter of 1μm are placed in water twice the weight of calcium carbonate whiskers to form a suspension, and sodium stearate with 1% by weight of calcium carbonate whiskers is added to the suspension. Stir for 20min at ℃, dry with hot air and make the water content of calcium carbonate whiskers <1;

[0038] 2) In step 1) the final product is placed in n-hexane twice the weight of calcium carbonate whiskers, and 4% silane coupling agent and 2% organic rare earth (rare earth carbonate) are added. Stir at 80°C for 60 minutes to remove n-hexane;

[0039] 3) Add 0.3% by weight of organic acid to the product obtained in step 2) during the stirring process, and then dry it with hot air at 80°C for 10 hours to obtain functionally modified calcium carbonate whiskers.

[0040] Then, blend the calcium carbonate filler masterbatch for polypropylene and polyethylene according to t...

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Abstract

The invention relates to the field of high polymer processing assistants and particularly relates to a calcium carbonate filler master batch for polypropylene and polyethylene and a preparation process thereof. The calcium carbonate filler master batch is prepared from the following ingredients in parts by weight: 60-80 parts of function-modified calcium carbonate whisker, 10-20 parts of carrier resin, 0.5-3 parts of coupling agent and 1-3 parts of lubricant, and is prepared through the steps of keeping all the ingredients at the temperature of 170-210 DEG C for 10-20 min and carrying out extrusion and granulation. The calcium carbonate filler master batch has the advantages that the cost is relatively lower, inorganic particles are uniformly dispersed in a high-polymer matrix, the combination between the inorganic particles and the high-polymer matrix is better, the calcium carbonate filler master batch has bacterium resisting and inhibiting properties, and mechanical properties, such as tensile strength, notched impact strength, wear resistance and the like, are improved.

Description

Technical field [0001] The invention relates to the field of polymer processing aids, in particular to a calcium carbonate filler masterbatch for polypropylene and polyethylene and a preparation process thereof. Background technique [0002] Calcium carbonate is an inorganic filler widely used in polymer composite materials. Adding calcium carbonate to rubber and plastic products can improve the strength, heat resistance, wear resistance, dimensional stability and rigidity of the products to a certain extent, and reduce the cost of the products. However, the hydrophilicity of inorganic fillers is due to the surface characteristics of the oil, which makes it poorly compatible with polymer materials. Therefore, irregular aggregates are easily formed during processing, resulting in uneven dispersion in polymer materials, resulting in internal defects, resulting in product failure. Physical and mechanical properties are reduced. In order to overcome the above-mentioned shortcomings...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/06C08L27/06C08K13/06C08K9/06C08K9/04C08K7/08C08J3/22
Inventor 吴礼庆
Owner JIANDE XINYU PLASTIC MATERIAL
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