Composite mineral powder capable of reducing size shrinkage rate of plastic as well as preparation method and application of composite mineral powder

A technology for compounding minerals and mineral powders, applied in chemical instruments and methods, dyeing organosilicon compound treatment, dyeing polymer organic compound treatment, etc. Large bonding surface, reduced agglomeration, and uniform composite effect

Active Publication Date: 2020-11-06
JIANGXI GUANGYUAN CHEM
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, the use of a single inorganic non-metallic powder filler cannot meet the comprehensive performance requirements of the product. How to give full play to the compre

Method used

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  • Composite mineral powder capable of reducing size shrinkage rate of plastic as well as preparation method and application of composite mineral powder
  • Composite mineral powder capable of reducing size shrinkage rate of plastic as well as preparation method and application of composite mineral powder
  • Composite mineral powder capable of reducing size shrinkage rate of plastic as well as preparation method and application of composite mineral powder

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preparation example Construction

[0049] The present invention provides a preparation method for the composite mineral powder described in the above scheme, comprising the following steps:

[0050] Mix mineral powder, composite dispersant and water to obtain composite slurry;

[0051] adding a pH regulator and an antistatic agent to the composite slurry, drying the resulting slurry to obtain a powder;

[0052] The powder is mixed with a surface modifying agent for modification to obtain a composite mineral powder that reduces the size shrinkage of plastics.

[0053] The invention mixes mineral powder, composite dispersant and water to obtain composite slurry. In the present invention, the mineral powder is preferably mixed with water, and then a composite dispersant is added to obtain a composite slurry. According to the invention, the mixing is preferably carried out in a mixing tank. In the present invention, the solid content of the composite slurry is preferably 30-50%, more preferably 45-45%. Because ...

Embodiment 1

[0065] Silica powder: talcum powder: wollastonite powder is formulated into a slurry with a solid content of 45% in a mass ratio of 1:5:5 and water, and 10‰ of a composite dispersant (specifically ethylene glycol, sodium polyacrylate and Sodium lauryl sulfate, the mass ratio of the three is 1:1:1); under low-speed stirring conditions (stirring speed 60r / min), add 6‰ pH regulator (being citric acid and tartaric acid , the mass ratio of citric acid and tartaric acid is 1:3), 6‰ of octadecyltrimethylammonium chloride, adjust the pH value to 8.5; The temperature is 330°C, the air outlet temperature is 130°C, and the speed of the rotating blade is 450r / min; the dried powder is added with 1.5% oligomeric short-chain alkylsilane coupling agent (Evonik's 9896) and 0.9% fatty acid polyoxyethylene ester for surface modification, the modification temperature was 135° C., and the modification time was 45 min; collected and packaged to obtain composite mineral powder.

Embodiment 2

[0067] Silica powder: talcum powder: wollastonite powder is formulated into a slurry with a solid content of 40% in a mass ratio of 1:6:6 and water, and 9‰ of a composite dispersant (specifically ethylene glycol, sodium polyacrylate and Sodium lauryl sulfate, the corresponding mass ratio of the three is 1:2:1); under low-speed stirring conditions (stirring speed 65r / min), add 5‰ pH regulator (being citric acid and Tartaric acid, the mass ratio of citric acid and tartaric acid is 1:2), 6‰ of octadecyltrimethylammonium chloride, adjust the pH value to 8.5; the inlet air temperature of flash drying is 330°C, and the outlet air temperature is 130°C , the rotating blade speed is 450r / min; the dried powder is added with 1.2% oligomeric short-chain alkyl silane coupling agent (Evonik's 9896) and 1.2% fatty acid polyoxyethylene ester for surface modification, the modification temperature is 130° C., and the modification time is 50 min; collect, pack, and obtain composite mineral powd...

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Abstract

The invention provides composite mineral powder capable of reducing the size shrinkage rate of plastic as well as a preparation method and application of the composite mineral powder, and belongs to the technical field of fine chemical engineering. According to the composite mineral powder capable of reducing the size shrinkage rate of the plastic as well as the preparation method and applicationof the composite mineral powder of the invention, three inorganic minerals, namely the silica powder, the talcum powder and the wollastonite powder, are compounded, so that the composite mineral powder can remarkably reduce the size shrinkage rate of a plastic product compared with a single mineral; with a composite dispersing agent adopted, the dispersity of the mineral powder can be improved; with a pH regulator and an antistatic agent added, agglomeration of the mineral powder can be reduced, and then full play of the effect of the mineral powder is facilitated; a composite surface modifieris adopted to perform surface modification treatment on the mineral powder, and therefore, the binding force between the composite mineral powder and the plastic matrix resin can be enhanced; the components cooperate with each other, so that the obtained composite mineral powder can significantly improve the comprehensive performance of the plastic product while the size shrinkage rate of the plastic product is reduced.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a composite mineral powder capable of reducing plastic dimensional shrinkage, a preparation method and application thereof. Background technique [0002] Plastic shrinkage refers to the percentage of the difference between the size of the plastic part at the molding temperature and the size after it is taken out of the mold and cooled to room temperature. It reflects the degree of size reduction of the plastic part after it is taken out of the mold and cooled. With the continuous increase of the application range of plastic products, the application field puts forward more stringent requirements for the products. It has become a new requirement in many fields to keep the original size of the plastic products after they are processed from the mold (such as automotive interior decoration. The parts need to be dimensionally stable, and the PVC sheet needs to have a small shri...

Claims

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Application Information

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IPC IPC(8): C08K9/06C08K9/04C08K3/36C08K3/34C08L23/12C08L27/06C09C1/00C09C3/12C09C3/10C09C3/04
CPCC08K9/06C08K9/04C08K9/08C08K3/36C08K3/34C09C1/0081C09C3/12C09C3/10C09C3/041C09C3/006C01P2006/19C01P2006/12C01P2006/90C08L23/12C08L27/06
Inventor 彭鹤松何秋华邹检生邓克文宋波张翔
Owner JIANGXI GUANGYUAN CHEM
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