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A kind of thermoplastic porous powder quartz for plastics and its preparation method

A porous powder quartz and thermoplastic technology, applied in the field of filler modification, can solve the problems of small amount of porous powder quartz addition, complex processing method, poor rheological processing performance, etc., achieve simple preparation and low cost, improve mechanical properties and processing Performance, the effect of increasing the amount of addition

Active Publication Date: 2019-07-12
广东浪沙口腔健康有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a thermoplastic porous powder quartz used in plastics and its preparation method, which can solve the problems of small amount of porous powder quartz used in plastic filling modification, poor rheological processing performance, etc., while avoiding the traditional surface Modification and other treatment methods are complicated in process and high in cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] First add 6kg of polyvinyl alcohol into 65kg of water to prepare a solution, then add 28kg of porous powdered quartz and 1kg of azobisisobutyronitrile, use an ultrasonic device with a motor power of 1000W, and disperse with 40Hz ultrasonic waves for 35min. Polyvinyl alcohol and azobisisobutyronitrile enter the micropores of porous powder quartz, and then use a bag filter to separate the solids in the dispersion, and use a vacuum tray dryer to vacuum dry at 60 ° C for 14 hours. The obtained solid and polymethyl methacrylate were weighed in a mass ratio of 3:1, added to a horizontal high-speed mixer, and pre-mixed for 25 minutes at a spindle speed of 120r / min and a temperature of 55°C, and then mixed in a single-screw Mixing and coating are carried out in the extruder. During mixing, the heating method of the barrel is resistance heating. The temperature is: 220°C in the first section, 240°C in the second section, 250°C in the third section, and 230°C in the fourth section...

Embodiment 2

[0033] First add 8kg of polyvinyl alcohol into 66kg of water to prepare a solution, then add 25kg of porous powdered quartz and 1kg of azobisisobutyronitrile, use an ultrasonic device with a motor power of 1200W, and disperse with 33Hz ultrasonic waves for 45min. Let polyvinyl alcohol and azobisisobutyronitrile enter the micropores of porous powder quartz, then use a tubular filter to separate the solids in the dispersion, and use a double-cone rotary vacuum dryer to vacuum dry at 62 ° C for 14 hours , so that polyvinyl alcohol and azobisisobutyronitrile form crystals, which are firmly embedded in the micropores of porous powder quartz; the obtained solid and polymethyl methacrylate are weighed in a mass ratio of 4:1, and added to a vertical In the mixer, pre-mix for 30 minutes under the conditions of the spindle speed of 130r / min and the temperature of 52°C, and then carry out mixing and coating in the twin-screw extruder. The barrel heating method is electric induction heatin...

Embodiment 3

[0037] First add 8kg of polyvinyl alcohol into 58kg of water to prepare a solution, then add 32kg of porous powdered quartz and 2kg of azobisisobutyronitrile, use an ultrasonic device with a motor power of 1800W, and use 45Hz ultrasonic waves to assist in dispersion for 36min. Let polyvinyl alcohol and azobisisobutyronitrile enter the micropores of porous powder quartz, then use a continuous disc filter to separate the solids in the dispersion, and use a vacuum rake dryer to vacuum dry at 70°C for 13h , so that polyvinyl alcohol and azobisisobutyronitrile form crystals, which are firmly embedded in the micropores of porous powder quartz; the obtained solid and polymethyl methacrylate are weighed in a mass ratio of 3:1, and added to a horizontal high-speed In the mixer, pre-mix for 22 minutes under the conditions of the spindle speed of 180r / min and the temperature of 57°C, and then carry out mixing and coating in the three-screw extruder. The barrel heating method is resistance...

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Abstract

The invention belongs to the field of filler modification and provides thermoplastic porous powder quartz for plastic and a preparation method. The method comprises the following steps: adding porouspowder quartz and azodiisobutyronitrile into an ethanol aqueous solution, then carrying out ultrasonic dispersion, filtering and carrying out vacuum drying; then mixing a mixture with polymethyl methacrylate, mixing and coating in a screw extruder to obtain the thermoplastic porous powder quartz; carrying out mixing and injection molding on a resin matrix and an assistant to obtain a porous powderquartz filling modified plastic product. Compared with a traditional method, the preparation method disclosed by the invention has the advantages that by tightly coating the porous powder quartz, thedispersion and thermoplastic processing properties of the porous powder quartz in plastic are effectively improved, and the additional amount of a porous powder quartz filling material in the plasticis improved, so that all mechanical properties and processing properties of the plastic product can be greatly improved, and the application prospect is broad; meanwhile, the preparation method has the advantages of simple whole preparation process, easiness in operation, lower cost and capability of being popularized and applied.

Description

technical field [0001] The invention belongs to the technical field of filler modification and provides a thermoplastic porous powder quartz used for plastics and a preparation method. Background technique [0002] With the deepening and development of research on composite materials, fillers, which are one of the components of composite materials, have been paid more and more attention by people. In plastic products, plastic filling modification is the compounding of fillers, plastics and resins. Fillers are an important means of plastic modification, which can not only reduce the cost of plastics, but also significantly improve various properties of plastics and endow plastics with new features. , to expand its application range, so the filler is an important and indispensable auxiliary material for the plastics industry. [0003] Among the various inorganic fillers used in plastics, porous powdered quartz is a very important one. Porous powder quartz belongs to a kind o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08K7/26C08L23/06C08L23/12C08L25/06C08L27/06C08L55/02
CPCC08K7/26C08K9/10C08L23/06C08L23/12C08L25/06
Inventor 陈庆贯大为
Owner 广东浪沙口腔健康有限公司
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