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Low warpage liquid crystal polymer composition and preparation method thereof

A technology of liquid crystal polymer and composition, applied in the field of liquid crystal polymer, can solve the problems of poor weld line strength, dimensional stability and rigidity defects, easy foaming, etc., to reduce warpage, reduce production cost, and increase strength and flexibility

Active Publication Date: 2011-08-03
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the above-mentioned patent can solve the problem of warping and deformation to a certain extent, it also has the disadvantages of poor weld line strength and easy foaming, and its dimensional stability and rigidity also have certain defects.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add various materials according to the material components described in Table 1, and its preparation method is:

[0028] a) Dry the LCP and PPS resins at 160°C and 140°C for 4 hours, respectively;

[0029] b) Use a high-speed mixer to mix the lubricant calcium stearate and compatibilizer polyethylene-grafted maleic anhydride to be added evenly, and then dry at 80°C for 6 hours;

[0030] c) Dry the polyester resin polyethylene terephthalate (PET) to be added at 120°C for 4 hours;

[0031] d) Mix the dried materials in (a), (b) and (c) with a high-speed mixer and put them into the main feeding hopper of the twin-screw extruder. It is fed from the side feeding port of the machine, melted and extruded, and granulated.

Embodiment 2

[0033] Add various materials according to the material components described in Table 1, and its preparation method is:

[0034] a) Dry the LCP and PPS resins at 160°C and 140°C for 5 hours respectively;

[0035] b) Use a high-speed mixer to mix the lubricant silicone oil to be added and the compatibilizer ethylene octene copolymer grafted maleic anhydride evenly, then dry at 80°C for 6 hours;

[0036] c) Dry the polyester resin polytrimethylene terephthalate (PCT) to be added at 120°C for 6 hours;

[0037] d) Mix the dried materials in (a), (b) and (c) with a high-speed mixer and put them into the main feeding hopper of the twin-screw extruder. It is fed from the side feeding port of the machine, melted and extruded, and granulated.

Embodiment 3

[0039] Add various materials according to the material components described in Table 1, and its preparation method is:

[0040] a) Dry the LCP and PPS resins at 160°C and 140°C for 6 hours respectively;

[0041] b) Use a high-speed mixer to mix the lubricant zinc stearate and compatibilizer silane coupling agent evenly, and dry at 80°C for 6 hours;

[0042] c) Dry the polyester resin polybutylene terephthalate (PBT) to be added at 120°C for 6 hours;

[0043] d) Put the dried materials in (a), (b) and (c) into the main feeding hopper of the twin-screw extruder after mixing them evenly with a high-speed mixer, and mix the reinforcing materials circular cross-section glass fiber and potassium titanate Whiskers are added from the side feed port of the twin-screw extruder, melted and extruded, and pelletized.

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Abstract

The invention relates to a low warpage liquid crystal polymer composition and a preparation method thereof; the composition comprises the following components by weight percentage: 20wt% to 80wt% of thermotropic liquid crystalline polymer with a melting point of at least 290 DEG C, 5wt% to 20 wt% of thermoplastic polyphenylene sulfide with a melting temperature of from 280 DEG C to 290 DEG C, 10 wt% to 70 wt% of reinforcing material and 0 wt% to 10 wt% of other additives. The preparation method comprises the steps: LCP and PPS resin are respectively dried at the temperature of 160 DEG C and 140 DEG C for 4-6 hours; a lubricating agent and a compatilizer to be added are uniformly mixed in a high speed blender and then are dried at the temperature of 80 DEG C for 4 to 6 hours; polyester resin to be added is dried for 4 to 6 hours at the temperature of 120 DEG C; the dried materials are uniformly mixed in the high speed blender and put into a main feeding hopper of a double-screw extruder; the reinforcing material is added from a side feeding opening of the double-screw extruder; and the materials are melted, squeezed out and pelleted. The preparation method has the advantages that the addition of polyphenylene sulfide can obviously reduce the warping degree; the fiber reinforcing material and lubricating material can be matched with polyphenylene sulfide so as to lead the mechanical property of the polyphenylene sulfide in the components to be reinforced.

Description

technical field [0001] The present invention relates to a liquid crystal polymer, in particular a liquid crystal polymer composition having improved warpage. The invention also relates to a preparation method of liquid crystal polymer. Background technique [0002] Liquid crystal polymer (LCP) is a polymer substance composed of rigid molecular chains, which can appear in a state of anisotropic physical properties such as liquid fluidity and crystal under certain physical conditions. LCP is widely used in electrical and electronic components such as printed circuit boards, semiconductors, connectors, relays, and switches because of its good heat resistance, mechanical properties, chemical resistance, and dimensional stability. [0003] With the development of information technology, the integration of electronic components is getting higher and higher, which requires the use of smaller, thinner and smaller parts. The problem brought about by the thinning of electronic compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/34C08K5/098C08L81/02C08L67/00C08K7/08C08K7/14B29B9/06C08K13/04
Inventor 易庆锋龙杰明陈健姜苏俊
Owner KINGFA SCI & TECH CO LTD
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