Spraying-free POM composite material with low warpage and high dimensional stability and preparation method of spraying-free POM composite material

A dimensional stability, composite material technology, applied in the field of polymer materials, can solve the problems of easy warpage deformation, large shrinkage, narrow application field, etc., and achieve stable comprehensive performance, outstanding characteristics, impact toughness and resistance. The effect of synergistic improvement of thermal performance

Inactive Publication Date: 2019-12-03
华合新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only is the application field relatively narrow, but also the solution to the problems of POM’s inherent large injection shrinkage (2.5-3.0%) and easy warping of parts has not been involved. Quantification and thin-wall trends are becoming more and more popular, and the size problem of spray-free POM after injection molding has become one of the unavoidable technical difficulties in the industry

Method used

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  • Spraying-free POM composite material with low warpage and high dimensional stability and preparation method of spraying-free POM composite material
  • Spraying-free POM composite material with low warpage and high dimensional stability and preparation method of spraying-free POM composite material
  • Spraying-free POM composite material with low warpage and high dimensional stability and preparation method of spraying-free POM composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Weigh the elastic ionomer and graphene oxide according to the data of Example 1 shown in Table 1, and mix them uniformly to obtain a mixed raw material.

[0044] Put the dried mixed raw materials into a closed reaction kettle, vacuumize the reaction kettle and fill it with inert nitrogen to protect it to normal pressure, then heat it to 190°C and keep it at a constant temperature, and stir at a constant speed of 150 rpm for 20 minutes. Then add a certain proportion of metallic toner, continue to stir for 30 minutes, and then fill with nitrogen to pressurize. The molten blend is exported from the bottom outlet of the closed reaction kettle, cooled, and pelletized to obtain functionalized masterbatches.

[0045] Table 1 Formula table of functionalized masterbatch (unit: gram)

[0046] Example 1 Example 2 Example 3 Example 4 Example 5 elastic ionomer 10 15 8 8 8 Graphene Oxide-1 2 5 5 Graphene Oxide-2 5 5 Metallic ...

Embodiment 2

[0048] Weigh the elastic ionomer and graphene oxide according to the data of Example 2 shown in Table 1, and mix them uniformly to obtain a mixed raw material.

[0049] Put the dried mixed raw materials into a closed reaction kettle, vacuumize the reaction kettle and fill it with inert nitrogen to protect it to normal pressure, then heat it to 190°C and keep it at a constant temperature, and stir at a constant speed of 150 rpm for 20 minutes. Then add a certain proportion of metallic toner, continue to stir for 30 minutes, and then fill with nitrogen to pressurize. The molten blend is exported from the bottom outlet of the closed reaction kettle, cooled, and pelletized to obtain functionalized masterbatches.

Embodiment 3

[0051] Weigh the elastic ionomer and graphene oxide according to the data of Example 3 shown in Table 1, and mix them uniformly to obtain a mixed raw material.

[0052] Put the dried mixed raw materials into a closed reaction kettle, vacuumize the reaction kettle and fill it with inert nitrogen to protect it to normal pressure, then heat it to 190°C and keep it at a constant temperature, and stir at a constant speed of 150 rpm for 20 minutes. Then add a certain proportion of metallic toner, continue to stir for 30 minutes, and then fill with nitrogen to pressurize. The molten blend is exported from the bottom outlet of the closed reaction kettle, cooled, and pelletized to obtain functionalized masterbatches.

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Abstract

The invention discloses a spraying-free POM composite material with low warpage and high dimensional stability and a preparation method of the spraying-free POM composite material. The spraying-free POM composite material with low warpage and high dimensional stability specifically comprises the following raw materials in parts by weight: 40-80 parts of POM resin, 1-5 parts of a dispersing agent,2-5 parts of an anti-aging auxiliary agent and 8-25 parts of functionalized masterbatches. The functionalized masterbatches comprise the following components in percentages by weight: 3-15 parts of anelastic ionomer, 2-10 parts of graphene oxide and 3-8 parts of metal toner. Through high-efficiency masterbatch predispersion of the elastic ionomer with high impact resistance modification effect, agraphene oxide sheet layer and the metal toner, the obtained POM composite material has a good surface spraying-free effect, on that basis, the problem of dimensional stability of POM with large forming shrinkage and easiness in warpage is obviously solved, the warpage of prepared sample plates with different wall thicknesses is reduced to be about 1/4-1/5 of that of a conventional material in ahigh-temperature and long-period testing environment, and moreover, by the high-efficiency composite masterbatch modification mode, the negative influence of the addition of the an elastomer toughening agent on the rigidity and heat resistance of the material can be effectively compensated.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a spray-free POM composite material with low warpage and high dimensional stability and a preparation method thereof. Background technique [0002] After polymer-based composites are injection molded into finished parts, they are often treated with surface painting to obtain high-brightness, high-gloss, and multi-color appearance effects, but the paints and solvents used will lead to high volatility, low environmental protection and A series of problems such as cumbersome post-treatment process, and the spray-free polymer matrix composite material is a kind of special material for new appearance parts with high environmental protection, high appearance effect and low cost developed in response to the above problems. Spraying is required but direct injection molding can obtain the appearance effect of the parts similar to spraying. [0003] Polyoxymethylene ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/04C08L15/00C08K13/06C08K3/04C08K9/10C08K3/40C08J3/22
CPCC08J3/226C08K2201/003C08J2359/02C08J2415/00C08K13/06C08K3/042C08K9/10C08K3/40
Inventor 徐凯华
Owner 华合新材料科技股份有限公司
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