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Preparation method and application of modified mica powder

A mica powder and modification technology, applied in chemical instruments and methods, fibrous fillers, dyed low molecular organic compound treatment, etc., can solve the problems of poor compatibility between mica powder and polyolefin, etc.

Active Publication Date: 2016-12-21
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of modified mica powder and its application to solve the problem of poor compatibility between mica powder and polyolefin

Method used

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  • Preparation method and application of modified mica powder
  • Preparation method and application of modified mica powder
  • Preparation method and application of modified mica powder

Examples

Experimental program
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Effect test

preparation example Construction

[0020] The application provides a kind of preparation method of novel mica powder, comprises the steps:

[0021] (1) Weigh a certain amount of mica powder, acetone, dibenzoyl peroxide (BPO), and acrylic acid (AA).

[0022] (2) Add mica powder into a three-necked flask filled with acetone, add AA and BPO under rapid stirring, react at 60-80°C for 2-4h, filter the reaction product, and dry it in an oven at 80-100°C for 6- 8h, the obtained mica powder A after acrylic surface modification.

[0023] (3) Add A and polyethylene wax into an extruder according to a certain mass ratio to extrude and granulate to obtain a modified mica powder.

[0024] Preferably, the mass ratio of mica powder, acetone, BPO, and AA in step (1) is (60-80): (240-360): (1-3): (4-8), and the effect of BPO is to initiate agent.

[0025] More preferably, the mica powder in step (1) is phlogopite, with a particle size of 5 μm-10 μm.

[0026] Preferably, the mass ratio of A and polyethylene wax in step (3) i...

Embodiment 1

[0035] 1) Weigh 600g of mica powder, 2.4kg of acetone, 10g of BPO and 40g of AA.

[0036] 2) Add mica powder into a three-necked flask filled with acetone, add AA and BPO under rapid stirring, react at 60°C for 2 hours, filter the reaction product, and dry it in an oven at 80°C for 6 hours to obtain mica with acrylic surface modification Powder A.

[0037] 3) Add 400g of mica powder A and 60g of polyethylene wax into the extruder to extrude and granulate to obtain the modified mica powder P1.

[0038] Among them, the temperature and screw speed of each zone of the twin-screw extruder are respectively: the temperature of the first zone is 140°C, the temperature of the second zone is 180°C, the temperature of the third zone is 180°C, the temperature of the fourth zone is 180°C, the temperature of the fifth zone is 180°C, and the temperature of the sixth zone is 180°C. The head temperature is 180°C, and the screw speed is 180r / min.

Embodiment 2

[0048] 1) Weigh 800g mica powder, 3.6kg acetone, 30g BPO and 80g AA.

[0049] 2) Add mica powder into a three-necked flask filled with acetone, add AA and BPO under rapid stirring, react at 80°C for 4 hours, filter the reaction product, and dry it in an oven at 100°C for 8 hours to obtain mica with acrylic acid surface modification Powder A.

[0050] 3) Add 600g of mica powder A and 120g of polyethylene wax into the extruder to extrude and granulate to obtain the modified mica powder P2.

[0051] Among them, the temperature and screw speed of each zone of the twin-screw extruder are: the temperature of the first zone is 160°C, the temperature of the second zone is 230°C, the temperature of the third zone is 230°C, the temperature of the fourth zone is 230°C, the temperature of the fifth zone is 230°C, and the temperature of the sixth zone is 230°C. The head temperature is 230°C; the screw speed is 260r / min.

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Abstract

The invention relates to a preparation method of modified mica powder. The preparation method includes the steps of: (1) weighing raw materials including mica powder, acetone, dibenzoyl peroxide and acrylic acid; 2) adding the mica powder to the acetone and adding the dibenzoyl peroxide and acrylic acid with stirring, performing a reaction for 2-4 h at 60-80 DEG C, filtering a reaction product, and drying the reaction product in a drying box at 80-100 DEG C for 6-8 h to obtain mica powder surface-modified by the acrylic acid (A); and 3) performing extrusive granulation to the product (A) with polyethylene wax according to certain mass ratio in an extruder to prepare the modified mica powder. The modified mica powder is a core-shell filler with the mica powder as the core while the polyethylene wax as a shell. The polyethylene wax has good compatibility with polyolefin, so that a problem of compatibility between the mica powder and the polyolefin is solved well.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to a preparation method and application of modified mica powder. Background technique [0002] For a long time, mica powder has been widely used in polymer materials. Toughened and reinforced polymer with mica powder is a hot technology developed by new research in recent years. However, due to the high surface energy of mica powder, it is easy to agglomerate, and the binding force with the polyolefin matrix is ​​poor, it is difficult to disperse evenly in it, which affects the use effect, so before adding it to the polymer as a filler, the surface of mica powder should be treated modified. [0003] However, a layer of polyethylene wax is coated on the surface of the mica powder through chemical bonding. This modified mica powder has good dispersion in the polyolefin matrix, which solves the problem of poor compatibility between the mica powder and the polyolefin matrix....

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L25/06C08L23/06C08L67/02C08K9/10C08K9/04C08K3/34C09C1/40C09C3/08C09C3/10B29C47/92B29C48/92
CPCB29C48/92B29C2948/9258B29C2948/92704C08K3/34C08K9/04C08K9/10C09C1/405C09C3/006C08L23/12C08L25/06C08L23/06C08L67/02
Inventor 刘凯
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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