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Calcium carbonate powder and preparation method thereof

A technology of calcium carbonate powder and calcium carbonate, which is applied in the field of calcium carbonate powder and its preparation, can solve the problems of poor dispersion and poor rubber compatibility, and achieve the effects of good dispersion, improved mechanical properties, and small agglomeration

Inactive Publication Date: 2017-12-01
长沙善道新材料科技有限公司
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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 provide a calcium carbonate powder and its preparation method to solve the existing problems of calcium carbonate such as hydrophilic and oleophobic, poor dispersibility, and poor compatibility with rubber.

Method used

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  • Calcium carbonate powder and preparation method thereof

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preparation example Construction

[0025] The preparation method of described calcium carbonate powder, comprises the following steps:

[0026] S1: crush calcium carbonate, pass through a sieve of 800-1200 mesh, and dry at a temperature of 75-82°C until the water content is ≤0.7%, to obtain crushed calcium carbonate;

[0027] S2: Add the calcium carbonate powder obtained in step S1 into a high-speed mixer, then add fatty alcohol polyoxyethylene ether ammonium sulfate, potassium persulfate, N, N-diethylaniline, vanadium pentoxide, and heat up to 95-100°C, stirring at a high speed of 1000-1200r / min for 25-30min to prepare mixture a;

[0028] S3: Add sodium diethylenetriaminepentacarboxylate, acrylic bridging agent, acrylate regulator, silane coupling agent A-151, citric acid ester, maleic anhydride grafting to the mixture a prepared in step S2 compatibilizer, hexenylbisstearamide, control the temperature at 76-85°C, stir at a speed of 800-1000r / min for 35-42min at a high speed, and prepare mixture b;

[0029] S...

Embodiment 1

[0032] A calcium carbonate powder, in parts by weight, comprising the following raw materials: 162 parts of calcium carbonate, 4 parts of fatty alcohol polyoxyethylene ether ammonium sulfate, 0.3 part of potassium persulfate, 0.2 part of N, N-diethylaniline, 0.1 part of vanadium pentoxide, 0.5 part of sodium diethylenetriaminepentacarboxylate, 0.4 part of acrylic bridging agent, 0.1 part of acrylate regulator, 0.4 part of silane coupling agent A-1510.4 part, 1.6 part of citric acid ester, horse 0.3 parts of toric anhydride grafted compatibilizer, 0.4 parts of hexenylbisstearamide, 0.5 parts of 2-(2'-hydroxy-3',5'-di-tert-phenyl)-5-chlorinated benzotriazole , 0.1 part of oxamide, 0.7 part of anti-aging agent BHT, 0.8 part of aluminum stearate;

[0033] The preparation method of described calcium carbonate powder, comprises the following steps:

[0034] S1: crush calcium carbonate, pass through a 1000-mesh sieve, and dry at a temperature of 80°C until the water content is 0.7%,...

Embodiment 2

[0039]A calcium carbonate powder, in parts by weight, comprising the following raw materials: 152 parts of calcium carbonate, 3.2 parts of fatty alcohol polyoxyethylene ether ammonium sulfate, 0.2 part of potassium persulfate, 0.2 part of N, N-diethylaniline, 0.1 part of vanadium pentoxide, 0.4 part of sodium diethylenetriamine pentacarboxylate, 0.3 part of acrylic bridging agent, 0.1 part of acrylate regulator, 0.3 part of silane coupling agent A-1510.3 part, 1.2 part of citric acid ester, horse 0.2 parts of toric anhydride grafted compatibilizer, 0.2 parts of hexenylbisstearamide, 0.3 parts of 2-(2'-hydroxy-3',5'-di-tert-phenyl)-5-chlorinated benzotriazole , 0.1 part of oxamide, 0.5 part of anti-aging agent BHT, 0.7 part of aluminum stearate;

[0040] The preparation method of described calcium carbonate powder is characterized in that, comprises the following steps:

[0041] S1: crush calcium carbonate, pass through a 800-mesh sieve, and dry at a temperature of 76°C until ...

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Abstract

The invention discloses calcium carbonate powder and a preparation method thereof. The calcium carbonate powder comprises the following raw materials: calcium carbonate, fatty alcohol polyoxyethylene ether ammonium sulfate, diethylene triamine sodium carboxylate, a bridging agent, a modifier, a coupling agent, tributyl citrate, a compatilizer, hexenyl distearamide, 2-(2'-hydroxy-3',5'-di-tert-phenyl)-5-benzotriazole chloride, oxamide, an age resister and aluminum stearate; and the calcium carbonate powder is prepared through the steps of surface modification, performance adjustment, crushing, drying and the like. The loose bulk density of modified calcium carbonate is significantly reduced, the calcium carbonate powder is fully dispersed, and is small in agglomeration phenomenon after being applied to plastic and is good in dispersity; and various mechanical properties of the modified calcium carbonate are significantly improved.

Description

【Technical field】 [0001] The invention belongs to the technical field of preparation of modified calcium carbonate, and in particular relates to a calcium carbonate powder and a preparation method thereof. 【Background technique】 [0002] Calcium carbonate is a commonly used inorganic filler. It is widely used in rubber, plastics, coatings and other fields due to its wide source and low price. However, the surface of calcium carbonate is hydrophilic and oleophobic, the specific surface area is large, the surface energy is high, and the particles are easily agglomerated. When directly or in large quantities filled in organic matrix materials, it is not only difficult to disperse evenly, but also has a weak binding force with the matrix, resulting in Defects at the two-phase interface, some performance degradation of the composite. Therefore, in order to broaden its application field, it is necessary to modify the surface of calcium carbonate to make its surface lipophilic and...

Claims

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Application Information

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IPC IPC(8): C08K9/04C08K9/02C08K9/06C08K3/26
CPCC08K9/04C08K3/26C08K9/02C08K9/06C08K9/08C08K2003/265C08K2201/003
Inventor 吴苗
Owner 长沙善道新材料科技有限公司
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