Lightweight polypropylene material containing microcapsule foaming agent

A polypropylene material and foaming agent technology, applied in the field of polypropylene materials, can solve the problems of poor material mechanical properties, low foaming ratio, poor surface quality, etc., and achieve good dimensional stability, high foaming ratio, and surface quality. excellent effect

Inactive Publication Date: 2016-08-17
SUZHOU RUNJIA ENGINEER PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing expanded polypropylene either has excellent material strength but low expansion ratio, which cannot meet the requirements of lightweight materials, or has relatively high expansion ratio, but the mechanical properties of the material are poor, and it is easy to make the structural body Shrinkage, large deformation, poor surface quality, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First prepare the microcapsule blowing agent:

[0024] S1: Suspension polymerization method to prepare polymer microspheres; the monomers used to prepare the polymer microspheres are acrylonitrile monomers.

[0025] S2: Coating the polymer microspheres with tetraethyl orthosilicate to obtain silica-coated microspheres a;

[0026] S3: Calcining microsphere a to obtain hollow silica microsphere b; the calcination temperature is 800°C;

[0027] S4: soaking microsphere b in butane to obtain microsphere c containing butane;

[0028] S5: Coating the microsphere c with tetraethyl orthosilicate to obtain a microcapsule foaming agent. The particle diameter of the microcapsule foaming agent is 0.5 μm.

[0029] Then, take by weight 100 parts of polypropylene resin, 1 part of sorbitol nucleating agent, 9 parts of microcapsule foaming agent, 10 parts of polyurethane elastomer, and the polypropylene resin has a C6-C8 long chain Branched polypropylene resin. The particle size of ...

Embodiment 2

[0034] First prepare microcapsule blowing agent by the method for embodiment 1:

[0035] Then, take by weight 100 parts of polypropylene resin, 5 parts of sorbitol type nucleating agent, 10 parts of microcapsule foaming agent, 20 parts of polyurethane type elastomer, described polypropylene resin has C6-C8 long chain Branched polypropylene resin. The particle size of the polyurethane-based elastomer is 0.5 μm. The above components are prepared by melt blending method commonly used in the art to prepare polypropylene material.

[0036] The obtained foamed polypropylene material is subjected to a performance test, and the impact strength test standard is ISO179 / 2-93, and the unit is KJ / m 3 , the expansion ratio is 50, and the impact strength is 30KJ / m 3 . , when the temperature is 23.8°C and the humidity is 58%RH, the sample density is 0.066g / cm 3 .

Embodiment 3

[0038] First prepare microcapsule blowing agent by the method for embodiment 1:

[0039] Then, take by weight 100 parts of polypropylene resin, 1 part of sorbitol nucleating agent, 12 parts of microcapsule foaming agent, 15 parts of polyurethane elastomer, and the polypropylene resin has a C6-C8 long chain Branched polypropylene resin. The particle size of the polyurethane-based elastomer is 0.5 μm. The above components are prepared by melt blending method commonly used in the art to prepare polypropylene material.

[0040] The obtained foamed polypropylene material is subjected to a performance test, and the impact strength test standard is ISO179 / 2-93, and the unit is KJ / m 3 , the expansion ratio is 45, and the impact strength is 28KJ / m 3 . , when the temperature is 23.8°C and the humidity is 58%RH, the sample density is 0.070g / cm 3 .

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Abstract

The invention discloses a lightweight polypropylene material containing a microcapsule foaming agent. The lightweight polypropylene material is prepared from, by weight, 100 parts of polypropylene resin, 1-10 parts of nucleating agent, 5-15 parts of microcapsule foaming agent and 10-20 parts of polyurethane elastomer, and the polypropylene resin is the polypropylene resin which is of a C6-C8 long chain branch structure. The foamed polypropylene is high in foaming ratio, uniform in cell size, small in material density, excellent in mechanical property of the material, and a formed body obtained through foamed polypropylene is excellent in surface quality and good in size stability.

Description

technical field [0001] The invention relates to a polypropylene material, in particular to a lightweight polypropylene material containing a microcapsule foaming agent. Background technique [0002] Compared with expanded polystyrene resin, expanded polypropylene resin has more excellent chemical resistance, heat resistance, and strain recovery rate after compression. Compared with expanded polyethylene resin, expanded polypropylene resin has More excellent dimensional precision, heat resistance, compressive strength, due to the above excellent properties, foamed molded products obtained from expanded polypropylene can be used for heat insulation materials, cushioning packaging materials, automotive interior parts, and cores for automotive bumpers materials and other uses. [0003] Existing expanded polypropylene either has excellent material strength but low expansion ratio, which cannot meet the requirements of lightweight materials, or has relatively high expansion ratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L75/04C08J9/32B01J13/02
CPCB01J13/02C08J9/32C08L23/12C08L2203/14C08J2475/04C08J2323/12C08L75/04
Inventor 汪理文李庆贵孙兆才翁永华丁贤麟
Owner SUZHOU RUNJIA ENGINEER PLASTIC
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