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Rare earth coupling agent, preparation method and application thereof in treatment of glass fiber reinforced polyformaldehyde composite material

A technology of rare earth coupling agent and composite material, which is applied in the field of preparation of rare earth coupling agent to treat glass fiber reinforced polyoxymethylene composite material, which can solve the problems of poor compatibility, weak combination, exposed fiber POM matrix interface, etc., and achieve enhanced Interfacial interaction, excellent weather resistance, and the effect of improving interfacial compatibility

Active Publication Date: 2012-09-19
YANKUANG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, many domestic POM manufacturers rarely sell corresponding glass fiber reinforced POM products.
This is mainly because POM will decompose obviously when encountering substances with strong polar groups, the molecular chains are regular and non-polar, there are no reactive groups, and it is in a relatively high crystallization state, compatible with GF and other fillers Poor performance, complex modification is difficult, even if the glass fiber is treated with silane coupling agent, it is easy to produce exposed fiber or poor combination with POM matrix interface

Method used

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  • Rare earth coupling agent, preparation method and application thereof in treatment of glass fiber reinforced polyformaldehyde composite material
  • Rare earth coupling agent, preparation method and application thereof in treatment of glass fiber reinforced polyformaldehyde composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Synthesis of rare earth coupling agent A:

[0030] Add 100g of rare earth lanthanum oxide into 100g of water to make a slurry, raise the temperature to 40°C, add 150g of polyvinyl alcohol 1788 5% aqueous solution with stirring, raise the temperature to 60°C, then add 100g of sulfuric acid solution with a concentration of 20%, and stir for 15min. Lanthanum sulfate slurry can be prepared.

[0031] Rare earth coupling agent A to treat glass fiber:

[0032] Coat 10Kg of glass fiber with 200g of rare earth coupling agent A slurry on its surface through the slurry dipping tank, squeeze out the residual slurry on the glass fiber surface through extrusion metering rollers, so that the coupling agent can evenly soak into each root glass fiber surface, and then pass the glass fiber bundle impregnated with the coupling agent through a heating cylinder with a length of 50 cm and a temperature of 120 ° C to bake to remove the moisture on the glass fiber surface and the coupling age...

Embodiment 2

[0034] Synthesis of rare earth coupling agent B:

[0035] Add 100g of rare earth cerium oxide into 100g of water to make a slurry, raise the temperature to 40°C, stir and add 150g of 5% aqueous solution of polyvinyl alcohol 1788, raise the temperature to 60°C, then add 100g of sulfuric acid solution with a concentration of 20%, and stir for 15min. Lanthanum sulfate slurry can be prepared.

[0036] Rare earth coupling agent treated glass fiber B:

[0037] Coat 10Kg of glass fiber with 200g of rare earth coupling agent B slurry on its surface through the slurry dipping tank, squeeze out the residual slurry on the glass fiber surface through extrusion metering rollers, so that the coupling agent can evenly soak into each root glass fiber surface, and then pass the glass fiber bundle impregnated with the coupling agent through a heating cylinder with a length of 50 cm and a temperature of 120 ° C to bake to remove the moisture on the glass fiber surface and the coupling agent of ...

Embodiment 3

[0039] Preparation of glass fiber reinforced POM:

[0040] Add 10Kg of POM resin, 30g of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, 20g of melamine, 20g of calcium carbonate, and 2Kg of glass fiber treated with rare earth coupling agent A Mix in a high-speed mixer, melt and knead with a vented twin-screw extruder, and extrude to granulate. Screw speed, 50 rpm; barrel temperature, 150-200°C. Compared with the POM matrix, the tensile strength of the prepared glass fiber reinforced POM can be doubled, the bending strength can be doubled, the heat distortion temperature can be increased by 60 ℃, and the thermal expansion coefficient can be reduced by 65%.

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Abstract

The invention relates to a rare earth coupling agent, a preparation method and the application of the rare earth coupling agent in treatment of glass fiber reinforced polyformaldehyde composite material; the rare earth coupling agent comprises the following raw materials in parts by weight: 100 parts of rare earth oxide, 100 parts of inorganic acid solution and 150 parts of polyvinyl alcohol water solution, wherein the rare earth oxide is one or two of lanthanum oxide and cerium oxide. For the application of the rare earth coupling agent in the treatment of the glass fiber reinforced polyformaldehyde composite material, a composite material can be prepared by steps of melting glass fiber treated with the rare earth coupling agent and polyformaldehyde (POM) resin, mixing with antioxidant, formaldehyde absorbent and formic acid absorbent and finally pelleting; compared with a POM matrix, the composite material has the advantages that the strength is improved by 2-3 times, the bending strength is improved by 2-3 times, the heat distortion temperature is increased by 60-65 DEG C, and the coefficient of thermal expansion is reduced by 60-80%.

Description

technical field [0001] The invention relates to a method for preparing a glass fiber reinforced polyoxymethylene composite material treated with a rare earth coupling agent, and belongs to the technical field of polymer material processing. Background technique [0002] Polyoxymethylene (POM) is based on [-CH 2 -O-] main chain, unbranched, high melting point, high density, high crystalline thermoplastic engineering plastics, with high strength and rigidity, excellent creep resistance, fatigue resistance, inherent lubricity, wear resistance It is the closest to metal in engineering plastics, and can be used to replace copper, aluminum, zinc and other non-ferrous metals and alloy products. It is widely used in electronics, automobiles, light industry, machinery, chemicals, building materials, etc. field. [0003] With the more and more extensive application of POM in various fields and the development of various instruments in the direction of miniaturization, high performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08K3/22C08K3/30C08K3/32C08K3/16C08L59/00C08K9/02C08K7/14
Inventor 杨军红侯世荣王克立杨明菊张雷张建平田欣慰张艳梅张建军李科研
Owner YANKUANG GRP CO LTD
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