Granular stearate, and preparation method and application thereof

A stearate and granular technology, applied in the field of granular stearate and its preparation, can solve the problems of small particle size of stearate, affecting the performance of main plastic products, difficulty in hygroscopicity and the like, and achieve hygroscopicity. Small, overcome the difficulty of feeding and metering, avoid dust pollution or the effect of explosion

Inactive Publication Date: 2012-02-01
LIAONING JIAKAI PEFINED CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In addition, due to the small particle size of the existing stearate, it is also very difficult to control its hygroscopicity, which inevitably affects the performance of the main plastic product during use.

Method used

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  • Granular stearate, and preparation method and application thereof
  • Granular stearate, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: the synthesis of calcium stearate

[0040] Add 900mL of water into a 3L closed reactor; add 300g of stearic acid; add 62 g of calcium chloride (on a dry basis); and add 22.5 g of sodium dodecylbenzenesulfonate under stirring conditions. Heat the temperature of the reactor to 125±5°C to fully emulsify the stearic acid in the aqueous solution of calcium chloride. Add the alkali lye prepared with 48g sodium hydroxide then, after adding, make reaction mixture insulation reaction 2 hours. After the reaction is completed, cool, centrifuge and dry to obtain a particle size of 180-830 μm and a bulk density of 0.48 g / cm 3 and granular calcium stearate with a heat loss of 1.0%.

Embodiment 2

[0041] Embodiment 2: the synthesis of calcium stearate

[0042] Add 900mL water in 3L airtight reactor; Add 300g stearic acid; Add 62 calcium chloride (on a dry basis); Fully emulsified in aqueous solution of calcium chloride. Add the alkali lye prepared with 48g sodium hydroxide then, after adding, make reaction mixture insulation reaction 2 hours. After the reaction is completed, cool, centrifuge and dry to obtain a particle size of 600-880 μm and a bulk density of 0.50 g / cm 3 And heat loss 1.0% by weight of granular calcium stearate.

Embodiment 3

[0043] Embodiment 3: the synthesis of calcium stearate

[0044] Add 900mL of water into a 3L closed reactor; add 300g of stearic acid; add 62 g of calcium chloride (on a dry basis); and add 22.5 g of sodium dodecylbenzenesulfonate under stirring conditions. Heat the temperature of the reactor to 110±5°C to fully emulsify the stearic acid in the aqueous solution of calcium chloride. Add the alkali lye prepared with 48g sodium hydroxide then, after adding, make reaction mixture insulation reaction 2 hours. After the reaction is completed, cool, centrifuge and dry to obtain a particle size of 150-180 μm and a bulk density of 0.32 g / cm 3 And heat loss 1.5% by weight of granular calcium stearate.

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Abstract

The invention relates to granular stearate, a preparation method thereof, and application of the granular stearate in the field of rubber and plastic. The stearate provided in the invention has granularity of 150 to 880 mu m, bulk density of 0.3 to 0.7 g/cm<3> and a heating loss no more than 1.5 wt%. The method provided in the invention comprises the steps of emulsifying stearic acid in an aqueous solution of a metal salt corresponding to the stearate under the condition of heating and adding an aqueous solution of sodium hydroxide. The stearate in the invention is granular, contains no dust and is environment friendly; when the stearate is used as a rubber and plastic auxiliary agent, it is convenient to add and measure the stearate, and production efficiency and quality of major products of rubber and plastic are substantially enhanced.

Description

technical field [0001] The present invention relates to granular stearate and its preparation method. More specifically, the present invention relates to a stearate with larger particle size and bulk density and smaller heat loss, a preparation method thereof, and the application of the stearate in the field of rubber and plastics. Background technique [0002] As we all know, metal stearates (also known as metal soaps), such as calcium stearate, zinc stearate, lead stearate, etc., are widely used as heat stabilizers for polyvinyl chloride and lubricants for various plastic processing. agent, release agent, etc. However, the vast majority of existing stearate products are powdered. For example, the chemical industry standard HG / T 2424-93 stipulates that the fineness of light calcium stearate needs to reach 99% to pass through a 75 μm sieve. Although it has been recognized that this powdery stearate not only causes dust pollution or dust explosion, but also causes difficult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C53/126C07C51/41C08K5/098C08L21/00B29C33/60
CPCB29C33/60C08K5/098C07C51/412
Inventor 佟立新
Owner LIAONING JIAKAI PEFINED CHEM
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