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Liquid crystal polymer/cubic boron nitride master batch and preparation method for same

A technology of liquid crystal polymer and cubic boron nitride, which is applied in the field of polymer materials, can solve the problems of poor high temperature resistance and achieve superior scratch resistance

Active Publication Date: 2013-04-03
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Judging from the current research on wear-resistant and scratch-resistant masterbatches, they are mainly used in some low-temperature materials (such as polypropylene and polyethylene). Wipe the masterbatch, but the high temperature resistance of this masterbatch is poor

Method used

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  • Liquid crystal polymer/cubic boron nitride master batch and preparation method for same
  • Liquid crystal polymer/cubic boron nitride master batch and preparation method for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Add 100 parts of liquid crystal polymer A950 to 5 parts of dimethyl silicone oil and mix for 2 minutes at room temperature in a high-speed mixer; then add 50 parts of cubic boron nitride powder with a particle size of 1000 mesh, and mix for 3 minutes in a high-speed mixer at room temperature. The speed is 100 rev / min;

[0042] (2) Melt and extrude the mixed material through a twin-screw extruder, granulate, and dry to obtain liquid crystal polymer / cubic boron nitride masterbatch; the temperature of the extruder is 200°C, 260°C, 300°C, 320°C, 320°C, 325°C, the length-to-diameter ratio of the screw is 30, and the screw speed is 200 rpm.

[0043] Add 0.5 parts by weight of the liquid crystal polymer / cubic boron nitride masterbatch prepared above into 99.5 parts of PA66 and mix it with a high-speed mixer at room temperature for 2 minutes at a mixing speed of 120 rpm. The product is extruded and granulated by a twin-screw extruder to obtain a modified high-temperature-r...

Embodiment 2

[0057] Add 10 parts of simethicone oil to 100 parts of liquid crystal polymer E6000 and mix it with a high-speed mixer at room temperature for 5 minutes, then add 100 parts of CBN powder with a particle size of 2500 mesh, and mix it with a high-speed mixer at room temperature for 5 minutes. The speed of the mixer is 300 rpm / min, melt and extrude the mixed material through a twin-screw extruder, granulate, dry, and pack. The temperature of the extruder is 200°C, 260°C, 300°C, 320°C, 330°C, and 335°C from the feed to the head, the screw length-to-diameter ratio is 40, and the screw speed is 300 rpm.

[0058] The liquid crystal polymer / cubic boron nitride masterbatch prepared by the above method was added to 94 parts of PA66 in 6 parts by weight and mixed for 5 minutes at room temperature with a high-speed mixer, and the mixing speed was 300 rpm. The mixture is extruded and granulated through a twin-screw extruder. The temperature of each zone of the extruder is 220°C, 260°C, 28...

Embodiment 3

[0061] Add 6 parts of simethicone oil to 100 parts of liquid crystal polymer HX2000 and mix for 3 minutes at room temperature in a high-speed mixer, then add 70 parts of CBN powder with a particle size of 1250 mesh, and mix for 5 minutes in a high-speed mixer at room temperature. The speed of the mixer is 120 rpm / min, melt and extrude the mixed material through a twin-screw extruder, granulate, dry, and pack. The temperature of the extruder is 200°C, 280°C, 300°C, 320°C, 320°C, and 325°C from the feed to the head in sequence, the length-to-diameter ratio of the screw is 35, and the screw speed is 220 rpm.

[0062] The liquid crystal polymer / cubic boron nitride masterbatch prepared by the above method was added to 98 parts of PPS in 2 parts by weight, and mixed at room temperature for 5 minutes by a high-speed mixer, and the mixing speed was 120 revolutions / min. The mixture is extruded and granulated through a twin-screw extruder. The temperature of each zone of the extruder i...

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Abstract

The invention discloses a liquid crystal polymer / cubic boron nitride master batch prepared from a liquid crystal polymer, cubic boron nitride and dimethyl silicon oil, and a preparation method thereof. The liquid crystal polymer / cubic boron nitride master batch disclosed by the invention is mainly used as a wear-resistant and scratch-resistant master batch in a high-temperature-resistant polymer, and capable of obviously improving the wear resistance and scratch resistance of the high-temperature-resistant polymer. By using a cross scratch resistance instrument and a colorimeter for detecting the scratch resistance, the minimum Delta L value is 0.21, which fully shows that the liquid crystal polymer / cubic boron nitride master batch disclosed by the invention is greatly excellent in the wear resistance and the scratch resistance of the high-temperature-resistant polymer.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a liquid crystal polymer / cubic boron nitride masterbatch and a preparation method thereof. [0002] Background technique [0003] Liquid crystal polymer, abbreviated as LCP in English, is an intermediate state polymer between solid crystal and liquid. Although its molecular arrangement is not as three-dimensionally ordered as solid crystal, it is not as disordered as liquid, but has a certain orderliness. It is a new type of polymer material, which generally exhibits liquid crystallinity in the molten state. This type of material has excellent heat resistance and molding processability. In addition, the main chain of the liquid crystal polymer molecule is rigid, the molecules are tightly packed, and are highly oriented during the molding process, so they have a small linear expansion coefficient, low molding shrinkage, very prominent strength and elastic modulus, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00C08L83/04C08K3/38C08J3/22C08L77/06C08L81/02C08L61/16C08L69/00C08L79/08C08L81/06B29C47/92B29B7/28B29C48/92
CPCB29C48/04B29C48/40B29C48/625B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 杨桂生俞飞
Owner HEFEI GENIUS NEW MATERIALS
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