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Modified PPA composite material, preparation method and application thereof

A composite material and modification technology, which is applied in the field of modified PPA composite material and its preparation, can solve the problems of easy cracking of composite materials, reduction of thermal expansion coefficient of composite materials, disadvantages, etc., and achieve simple production process, accelerated crystallization rate, and improved mechanical properties. performance effect

Inactive Publication Date: 2017-10-10
MLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the mechanical properties of PPA resin materials are mainly improved by filling glass fibers or common materials in PPA resins. However, the above-mentioned filling methods still have the following deficiencies: first, filling glass fibers can improve the strength of PPA resin materials, but The toughness of the glass fiber greatly hinders the fluidity of the PPA resin material, which is not conducive to the rapid injection molding of the PPA resin; secondly, the filling reinforcement of the common material used has little effect on the fluidity of the PPA resin, but the existing common materials are not conducive to improving the PPA resin. The mechanical strength of the resin material is not conducive to reducing the thermal expansion coefficient of the composite material, so that in the environment of alternating high temperature and low temperature, the PPA composite material is easy to crack, which seriously affects the service life and quality of the product
In actual production, the production efficiency of the LED lamp bead bracket is mainly improved by increasing the injection speed and the density of the mold cavity. However, due to the high fluidity, high strength and low thermal expansion coefficient of the existing PPA composite material, it cannot Rapid injection molding of small-sized LED lamp bead brackets in high-density cavities

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A modified PPA composite material in this embodiment includes the following components: 4.6 kg of semi-crystalline polyphthalamide PPA resin, 2.81 kg of silicate mineral fiber reinforced modifier, 0.06 kg of antioxidant, Lubricant 0.06 kg, long carbon chain linear saturated carboxylic acid sodium salt nucleating agent 0.01 kg, long carbon chain polyester polymer high flow modifier 0.02 kg, black masterbatch with a carbon black content of more than 92% 0.05 kg;

[0040] Among them, the antioxidants are tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and 1,3,5-tris(4-tert-butyl-3-hydroxy-2 ,6-dimethylbenzyl)-1,3,5-triazine-2,4,6-(1H,3H,5H)-trione mixture;

[0041] Wherein, lubricant is the mixture of N, N'-diethylene stearic acid amide and stearic acid amide;

[0042] The preparation method comprises the following steps:

[0043] Step 1, pretreatment: Weigh the PPA resin, antioxidant, lubricant, nucleating agent, high-flow modifier and h...

Embodiment 2

[0047] A modified PPA composite material in this embodiment includes the following components: 5.35 kg of semi-crystalline polyphthalamide PPA resin, 4.5 kg of silicate mineral fiber reinforced modifier, 0.03 kg of antioxidant, 0.02 kg of lubricant, 0.03 kg of nucleating agent of long carbon chain saturated carboxylic acid calcium salt, 0.04 kg of high flow modifier of long carbon chain polyester polymer, 0.2 kg of black masterbatch with a carbon black content of more than 92%;

[0048] Among them, the antioxidants are N,N'-bis-(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl)hexamethylenediamine, bis(2,4-dicumylphenyl) A mixture of pentaerythritol diphosphite and tris(2,4-di-tert-butylphenyl)phosphite;

[0049] Wherein, the lubricant is a mixture of paraffin wax, polyethylene wax, and polypropylene wax.

[0050] The preparation method comprises the following steps:

[0051] Step 1, pretreatment: Weigh the PPA resin, antioxidant, lubricant, nucleating agent, high-flow modifie...

Embodiment 3

[0055] A modified PPA composite material in the present embodiment includes the following components: 7 kg of semi-crystalline polyphthalamide PPA resin, 3.83 kg of silicate mineral fiber reinforced modifier, 0.04 kg of antioxidant, lubricating Agent 0.03 kg, long carbon chain linear saturated carboxylic acid sodium salt nucleating agent 0.02 kg, long carbon chain polyester polymer high flow modifier 0.05 kg, black mother 0.1kg with carbon black content of more than 92%;

[0056] Among them, the antioxidant is 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4,6-( 1H,3H,5H)-triketone, N,N'-bis-(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl)hexamethylenediamine mixture;

[0057] Among them, the lubricant is a mixture of polyamide wax, polyester wax, polysiloxane, silicone powder, and silicone masterbatch;

[0058] The preparation method comprises the following steps:

[0059] Step 1, pretreatment: Weigh the PPA resin, antioxidant, lubricant, nucleating ...

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Abstract

The invention relates to the technical field of a high polymer material and specifically relates to a modified PPA composite material, a preparation method and an application thereof. The modified PPA composite material comprises PPA resin, reinforced modifier, antioxidant, lubricant, nucleating agent, high-fluidity modifier and high-concentration black master batch. The modified PPA composite material has the advantages of high fluidity, high strength and low thermal expansion factor. The preparation method comprises the steps of pretreatment, mixing and fusing pelletizing and has the advantages of simple process and low production cost. Besides, the modified PPA composite material can be applied to the preparation of an LED bead bracket and can promote the miniaturization development of the LED bead.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a modified PPA composite material and its preparation method and application. Background technique [0002] PPA resin is a semi-aromatic polyamide raw material of phthalic acid, which has the advantages of high rigidity, high heat resistance, and high strength. Among them, after adding glass fiber, mineral fiber, etc. to the PPA resin for filling modification, the thermal deformation temperature of the PPA resin can reach 280 ° C, and, under high temperature and high humidity conditions, the tensile strength and flexural modulus of the PPA resin Both are 20% or more higher than nylon 6. It can be seen that the PPA resin material has good mechanical strength and applicability. [0003] At present, the mechanical properties of PPA resin materials are mainly improved by filling glass fibers or common materials in PPA resins. However, the above-mentioned filling methods st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L67/00C08L91/06C08L23/06C08L23/12C08K13/04C08K3/04C08K7/10C08K5/098C08K5/20B29B9/06B29C47/92B29C48/92
CPCC08L77/06B29B9/06B29C48/92B29C2948/92704C08K2201/014C08L2201/08C08L2203/20C08L2205/02C08L2205/025C08L2205/035C08L2205/24C08L67/00C08K13/04C08K3/04C08K7/10C08K5/098C08K5/20C08L91/06C08L23/06C08L23/12C08L77/00C08L83/04
Inventor 刘天明刘志平涂梅仙张沛石红丽
Owner MLS
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