Application of nucleating agent for lowering separation viscidity of polypropylene composite material

A composite material and nucleating agent technology, applied in the field of polypropylene materials, can solve the problems of inapplicability, reduce self-polarity, easy agglomeration of the matrix, etc., and achieve the effects of inhibiting the precipitation of additives, solving the problem of stickiness, and simple operation.

Active Publication Date: 2019-02-19
CHENGDU KINGFA SCI & TECH ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The three methods have a certain effect on reducing the viscosity of precipitation, but there are also obvious deficiencies.
The disadvantage of adding a compatibilizer containing polar groups is: the compatibilizer can promote the uniform dispersion of polar functional additives, but in the case of the same addition amount, the content of additives dispersed on the surface of the material will decrease and affect To the corresponding function (for example, the reduction of the content of scratch resistance agent on the surface will affect the scratch resistance function), if the overall addition of additives is increased, it may affect other properties of polypropylene materials, and also significantly increase the cost; replacement is low The disadvantage of polar additives is that there are certain limitations. First of all, low polarity only reduces its own polarity, but not completely converted to non-polarity. Therefore, it only delays the occurrence of stickiness instead of eradicating it. Secondly, not all types of additives can find corresponding low-polarity substitutes, so they are not suitable for all polypropylene composite material systems; It is easy to agglomerate in the medium, which affects its own use effect, especially in the area where the flow field changes during the molding process of the part, it is more likely to have appearance defects such as agglomeration and cracking on the surface of the part
[0005] In summary, the existing methods to solve the stickiness of polypropylene materials have limitations

Method used

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  • Application of nucleating agent for lowering separation viscidity of polypropylene composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] An embodiment of the polypropylene composite material of the present invention, the polypropylene composite material described in this embodiment is prepared by the following method:

[0035]Weigh 67 parts of polypropylene, 20 parts of talcum powder with an average particle diameter of 3 μm, 10 parts of ethylene-octene polymer, 0.25 part of antioxidant 1010, 0.25 part of antioxidant 168, 2.5 parts of auxiliary agent (including: 0.25 part Light stabilizer, 0.25 parts of lubricant and 2 parts of anti-scratch agent) and 0.5 part of sorbitol α-nucleating agent; put the above raw materials into a high-speed mixer and stir fully to obtain a premix, and place the premix in a twin-screw The main feeding port of the extruder is melted and extruded, granulated and dried to obtain the polypropylene composite material.

[0036] The melt extrusion conditions of the twin-screw extruder are: the temperature of the first zone is 90°C, the temperature of the second zone is 200°C, the te...

Embodiment 2

[0038] An embodiment of the polypropylene composite material of the present invention, the polypropylene composite material described in this embodiment is prepared by the following method:

[0039] Weigh 67 parts of polypropylene, 20 parts of talcum powder with an average particle diameter of 3 μm, 10 parts of ethylene-octene polymer, 0.25 part of antioxidant 1010, 0.25 part of antioxidant 168, 2.5 parts of auxiliary agent (including: 0.25 part light stabilizer, 0.25 parts of lubricant and 2 parts of anti-scratch agent) and 0.5 parts of rare earth β-nucleating agent; the above raw materials are put into a high-speed mixer and fully stirred to obtain a premix, and the premix is ​​placed in a twin-screw extruder The main feeding port of the machine is melted and extruded, granulated and dried, and the polypropylene composite material is obtained.

[0040] The melt extrusion conditions of the twin-screw extruder are: the temperature of the first zone is 90°C, the temperature of ...

Embodiment 3

[0042] An embodiment of the polypropylene composite material of the present invention, the polypropylene composite material described in this embodiment is prepared by the following method:

[0043] Weigh 67 parts of polypropylene, 20 parts of talcum powder with an average particle diameter of 3 μm, 10 parts of ethylene-octene polymer, 0.25 part of antioxidant 1010, 0.25 part of antioxidant 168, 2.5 parts of auxiliary agent (including: 0.25 part Light stabilizer, 0.25 parts of lubricant and 2 parts of anti-scratch agent), 0.25 parts of sorbitol type α nucleating agent and 0.25 part of rare earth type β nucleating agent; put the above raw materials into a high-speed mixer and fully stir to obtain a premix , putting the premixed material in the main feeding port of the twin-screw extruder for melt extrusion, granulation and drying to obtain the polypropylene composite material.

[0044] The melt extrusion conditions of the twin-screw extruder are: the temperature of the first zo...

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Abstract

The invention discloses application of a nucleating agent for lowering the separation viscidity of a polypropylene composite material. The invention further provides a polypropylene composite material. The polypropylene composite material is prepared from, by weight, 36-95 parts of polypropylene resin and 0.1-1 part of a nucleating agent, wherein the nucleating agent is at least one of alpha crystal type nucleating agent and a beta crystal type nucleating agent. The separation viscidity of the polypropylene material is lowered, by adding the nucleating agent, by means of the space closed effect generated after the crystallinity degree is increased, the phenomenon that auxiliaries are separated out in the using process is restrained, and the viscidity problem is solved. Meanwhile, the invention discloses a preparation method of the polypropylene composite material.

Description

technical field [0001] The invention relates to a polypropylene material, especially the application of a nucleating agent in reducing the precipitation and stickiness of a polypropylene composite material. Background technique [0002] Polypropylene has the advantages of low density, excellent mechanical properties, fatigue resistance and low price, and is widely used in automobiles, home appliances, food packaging and other fields. Among them, in the field of automotive interiors, in order to meet the heat aging resistance, light aging resistance, scratch resistance and processability requirements of interior parts, it is necessary to add a certain amount of antioxidants and light stabilizers to the polypropylene matrix. , anti-scratch agent, processing aid and other functional additives for functional modification. [0003] Polypropylene material is polymerized by propylene monomer, does not contain polar groups, and is a non-polar material; functional additives such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/08C08K3/34C08K5/134C08K5/526C08K5/053C08K13/02
CPCC08L23/12C08L2205/24C08L23/0815C08K3/34C08K5/1345C08K5/526C08K5/053C08K13/02
Inventor 张宇王林姚程马金成袁强陈锐黎怀远吴志强
Owner CHENGDU KINGFA SCI & TECH ADVANCED MATERIALS CO LTD
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