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Preparation method of inorganic powder specially used for low-density composite ivory boards

A technology of composite white cardboard and inorganic powder, which is applied in the field of environmentally friendly paper raw materials, can solve the problems of poor pressure resistance of hollow glass beads, strong adsorption of porous materials, and reduced density of stone paper, so as to prevent breakage, low density, and oil absorption. The effect of lowering the value

Inactive Publication Date: 2016-02-24
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing problem is that porous materials have strong adsorption and high oil absorption value, so more lubricants need to be added to achieve lubrication processing; and hollow glass beads are easily broken during screw extrusion molding due to poor pressure resistance, which makes lubrication The additive occupies the pores of the porous material, so the density reduction of stone paper is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) adding 30 parts by weight of water glass with modulus of 1, 15 parts by weight of particle diameter meeting 5 microns of rhodochrosite, 3 parts by weight of acrylic ester into reaction mixer, at normal temperature with high-speed stirring and dispersion of 400rpm for 15 minutes, get a coating agent;

[0025] (2) The coating agent obtained in step (1), 80 parts by weight of diatomaceous earth, 5 parts by weight of magnesium chloride solution with a mass concentration of 20%, and 0.01 part by weight of 2,3-diphenylbutyronitrile were added to the closed reaction Heat and pressurize in the vessel, maintain the pressure of the reactor at 1.2MPa and the temperature at 60-80°C, then stir and react at a stirring speed of 200rpm for 20min, the coating agent is coated on the surface of the diatomite particles and polymerized, solidified and solidified;

[0026] (3) Add the material obtained in step (2) and 3 parts by weight of the silane coupling agent into a high-speed mixer...

Embodiment 2

[0029] (1) 25 parts by weight of water glass with a modulus of 2, 15 parts by weight of rhodochrosite, and 2 parts by weight of methacrylate were added to the reaction mixer, and dispersed at a high speed of 900 rpm for 20 minutes at normal temperature to obtain a coating coating agent;

[0030] (2) The coating agent obtained in step (1), 100 parts by weight of expanded vermiculite powder, 8 parts by weight of magnesium sulfate solution with a mass concentration of 20%, and 0.02 parts by weight of 2,3-diphenylbutyronitrile were added to the sealed The reactor is heated and pressurized, the pressure of the reactor is maintained at 0.8-1.2MPa, and the temperature is 60-80°C, and then the reaction is stirred at a stirring speed of 300rpm for 30min, and the coating agent is coated on the surface of the porous inorganic powder particles and polymerized , solidification and solidification;

[0031] (3) Add the material obtained in step (2) and 5 parts by weight of titanate coupling...

Embodiment 3

[0034] (1) 30 parts by weight of water glass, 10 parts by weight of rhodochrosite, 2 parts by weight of styrene are added to reaction mixer, and at normal temperature, with the high-speed stirring and dispersion of 900rpm for 20 minutes, a coating agent is obtained;

[0035](2) Add the coating agent obtained in step (1), 120 parts by weight of expanded vitrified microbeads, 8 parts by weight of magnesium chloride salt solution, and 0.02 parts by weight of 2,3-diphenylbutyronitrile into the closed reactor Heat and pressurize, maintain the pressure of the reactor at 0.8-1.2MPa and the temperature at 60-80°C, and then stir and react at a stirring speed of 400rpm for 25min. The coating agent is coated on the surface of the porous inorganic powder particles and polymerized, solidified and solidified. ;

[0036] (3) Add the material obtained in step (2) and 4 parts by weight of aluminate coupling agent into a high-speed mixer, stir at 1200 rpm and 120 ° C for 45 minutes, and pass th...

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Abstract

The invention discloses a preparation method of inorganic powder specially used for low-density composite ivory boards, and belongs to the field of composite raw materials. The method is characterized in that a porous material is coated under pressurizing conditions to make the surface of the porous material be bonded with a pressure-resistant flexible protection layer and to make internal cavities of the porous material be well reserved, so the obtained porous material has excellent low density characteristic. The closed pore property and the toughness of the surface of the lightweight inorganic powder are realized especially through using an inorganic bonding agent and a polymer monomer by polymerization and solidification. The inorganic powder has crushing resistance when being used in a screw extruder to prepare the composite ivory boards, so the low density and the light mass of the composite ivory boards are guaranteed.

Description

technical field [0001] The invention belongs to the field of environmentally friendly paper raw materials, and in particular relates to a method for preparing special inorganic powder for low-density composite white cardboard. Background technique [0002] Cai Lun's technology of using plant fiber to make paper is an outstanding invention in the history of human civilization. The appearance of paper has brought great convenience to human life and study. Papermaking technology has almost reached the point of perfection after continuous transformation and development. However, with the extensive application of paper in packaging and other fields, the demand is increasing, and the production needs to consume a large amount of forest resources and generate a large amount of waste water. Therefore, the technical aspect of utilizing plant fiber to make paper is leading a severe challenge. [0003] An environmentally friendly stone paper with inorganic mineral powder as the main ...

Claims

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Application Information

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IPC IPC(8): C08K9/02C08K9/10C08K9/04C08K9/06C08K7/26C08K7/28
Inventor 陈庆曾军堂
Owner TAIYUAN UNIV OF TECH