Method for preparing active calcium carbonate

A technology of activated calcium carbonate and calcium carbonate, which is applied in the directions of fibrous filler, dyed low molecular organic compound treatment, dyed organic silicon compound treatment, etc. performance, improve overall performance

Inactive Publication Date: 2011-02-09
山东海泽纳米材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the manufacturing process is complicated, resulting in an increase in the production cost of the enterprise

Method used

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  • Method for preparing active calcium carbonate
  • Method for preparing active calcium carbonate
  • Method for preparing active calcium carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The calcium carbonate slurry (8% solid content) with a particle size of 0.04 μm was thoroughly stirred, and heated to 80° C. Taking the calcium carbonate in the slurry as 100 parts by weight, add 3 parts by weight of stearic acid mixture saponified by sodium hydroxide and heating and stirring at 90°C to form sodium stearate, add 0.5 parts by weight of mixed coupling agent, insulated and stirred for 1h, and finally filtered, dried and pulverized to obtain the active calcium carbonate of the present invention.

[0017] Utilize the active calcium carbonate that above-mentioned method obtains with the consumption of 100 parts by weight of rubber 17 parts, be mixed in natural rubber, butadiene rubber, mix by conventional rubber mixing method, vulcanize and test. Rubber composition performance test method: according to GB / T531-1999 detection of hardness of rubber composition; according to GB / T 528-1998 detection of rubber composition 300% elongation, tensile strength, elongat...

Embodiment 2

[0019] The calcium carbonate slurry (8% solid content) with a particle size of 0.04 μm was thoroughly stirred, and heated to 80° C. Taking the calcium carbonate in the slurry as 100 parts by weight, add 3.5 parts by weight of stearic acid mixture saponified by sodium hydroxide and heating and stirring at 90°C to form sodium stearate, add 0.3 parts by weight of mixed coupling agent, insulated and stirred for 3 hours, and finally filtered, dried and pulverized to obtain the active calcium carbonate of the present invention.

[0020] Same as embodiment 1, with the consumption of the above-mentioned active calcium carbonate of 100 parts by weight rubber 17 parts, be mixed in natural rubber, butadiene rubber, mix by conventional rubber mixing method, vulcanize and test. The assay method is the same as in Example 1.

Embodiment 3

[0022] Thoroughly stir the calcium carbonate slurry (8% solid content) with a particle size of 0.04 μm, and heat to 60° C. Taking the calcium carbonate in the slurry as 100 parts by weight, add 10 parts by weight of stearic acid mixture saponified by sodium hydroxide and heating and stirring at 90°C to form sodium stearate, add 0.05 parts by weight for mixing and coupling agent, insulated and stirred for 5 hours, and finally filtered, dried and pulverized to obtain the active calcium carbonate of the present invention.

[0023] Same as embodiment 1, with the consumption of 100 parts by weight rubber 17 parts of above-mentioned activated calcium carbonates, be mixed in natural rubber, butadiene rubber, mix by conventional rubber mixing method, vulcanize and test. The assay method is the same as in Example 1.

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Abstract

The invention discloses a method for preparing active calcium carbonate, which comprises the following steps of: adding 1 to 10 weight parts of one or a mixture of more of fatty acid and fatty acid salt and 0.05 to 5 weight parts of coupling agent into suspension containing 100 weight parts of calcium carbonate, and modifying at the temperature of between 60 and 90 DEG C for 0.5 to 5 hours to prepare the active calcium carbonate. The method has a simple preparation process and is stable in performance; and the surface of the prepared active calcium carbonate has the good hydrophobicity, is easy to disperse in rubber and resin, improves the combination property of polymers, and can be used in fields of the rubber, adhesives and the like.

Description

technical field [0001] The invention relates to a preparation method of nano calcium carbonate, in particular to a preparation method of active calcium carbonate which can be used to improve the comprehensive properties of rubber and resin. Background technique [0002] Calcium carbonate is an important inorganic filler. Due to its low price and wide range of raw materials, it is widely used in industries such as rubber, plastics, paper, coatings, adhesives, and inks. Calcium carbonate is divided into heavy calcium carbonate and light calcium carbonate according to different preparation methods. Heavy calcium carbonate is obtained by directly crushing natural calcite, limestone, chalk, white shellfish, etc. by mechanical means. Light calcium carbonate is made from limestone, which is calcined to produce quicklime, then digested with water and carbonized by absorbing carbon dioxide, and finally dehydrated, dried and pulverized. Calcium carbonate is affected by factors such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/00C09C3/08C08L7/00C08K9/06C09C1/02C08K3/26C08K9/04C09C3/12C08L63/00
Inventor 崔丽丽肖建平李常林郭安慧陈祥芝朱孝川
Owner 山东海泽纳米材料有限公司
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