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A kind of anti-stress whitening reinforced toughened polypropylene compound and preparation method thereof

A technology for strengthening and toughening polypropylene, which is applied in the field of stress whitening resistance reinforced and toughened polypropylene composites and its preparation. There are many problems such as the amount of propylene, so as to achieve the effects of low cost, simple preparation method and improved toughness.

Active Publication Date: 2016-08-17
SHANGHAI KINGFA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the patent CN101709124A discloses a folding-resistant and anti-stress-whitening polypropylene material, which improves the toughness and stress-whitening resistance of the material by adding elastomers and self-made anti-stress-whitening masterbatches to the high-impact polypropylene substrate , although the material shows very high impact resistance, the amount of copolymerized polypropylene is too much, resulting in a serious decrease in the rigidity of the material, and the resistance to stress whitening is not very prominent
Patent CN101058655A discloses a filled polypropylene material with resistance to stress whitening and stress cracking. Polyethylene is used to improve stress whitening, but it uses block copolymerized polypropylene, and the amount of copolymerized polypropylene is too much, resulting in the material's resistance to Stress whitening effect is not very ideal

Method used

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  • A kind of anti-stress whitening reinforced toughened polypropylene compound and preparation method thereof
  • A kind of anti-stress whitening reinforced toughened polypropylene compound and preparation method thereof
  • A kind of anti-stress whitening reinforced toughened polypropylene compound and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of filler masterbatch

[0030] 28 parts by weight of polypropylene resin, 60 parts by weight of talcum powder inorganic filler (average particle size is 5 microns), 8 parts by weight of aminosilane coupling agent, 10 parts by weight of polypropylene grafted maleic anhydride (melt index is 80g / 10min, graft rate 0.8%) and 0.4 parts by weight of processing aid zinc stearate are mixed evenly, and then melted and extruded to form pellets through a screw extruder, and the processing temperature of the extruder is 190- 230°C.

[0031] (2) Preparation of stress-whitening-resistant reinforced and toughened polypropylene composites:

[0032] Take each substrate component by the following parts by weight:

[0033] 61 parts by weight of polypropylene resin

[0034] 5 parts by weight of SBS elastomer

[0035] 30 parts by weight of filler masterbatch

[0036] 1 part by weight of segment binder dicumyl oxide

[0037] 3 parts by weight of zinc oxide

[0038] 0.2 ...

Embodiment 2

[0043] (1) Preparation of filler masterbatch

[0044] 30 parts by weight of polypropylene resin, 60 parts by weight of talcum powder inorganic filler (average particle size is 5 microns), 10 parts by weight of epoxy silane coupling agent, 10 parts by weight of polypropylene grafted acrylic acid (melt index is 80g / 10min, grafting rate 0.8%) and 0.3 parts by weight of processing aid calcium stearate are mixed evenly, and then melted and extruded to form pellets through a screw extruder, and the processing temperature of the extruder is 190-230°C. .

[0045] (2) Preparation of stress-whitening-resistant reinforced and toughened polypropylene composites:

[0046] Take each substrate component by the following parts by weight:

[0047] 57 parts by weight of polypropylene resin

[0048] 5 parts by weight of SBS elastomer

[0049] 30 parts by weight of filler masterbatch

[0050] 5 parts by weight of segment binder benzoyl peroxide

[0051] 3 parts by weight of zinc oxide

[...

Embodiment 3

[0057] (1) The preparation of the filler masterbatch is the same as in Example 1.

[0058] (2) Preparation of stress-whitening-resistant reinforced and toughened polypropylene composites:

[0059] Take each substrate component by the following parts by weight:

[0060] 42 parts by weight of polypropylene resin

[0061] 20 parts by weight of SBS elastomer

[0062] 30 parts by weight of filler masterbatch

[0063] 5 parts by weight of chain segment binding agent dicumyl oxide

[0064] 3 parts by weight of zinc oxide

[0065] 0.2 parts by weight of antioxidant 1010

[0066] The processing aid zinc stearate of 0.2 weight part;

[0067] Its preparation process is as follows:

[0068] After the components weighed above are mixed evenly, they are added to a twin-screw extruder for extrusion. The temperature of the extruder is set at 210°C and the speed is 300rpm; the extruded product is cooled by water and pelletized to obtain Reinforced toughened polypropylene compound for str...

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Abstract

The invention belongs to the technical field of high polymer materials, and in particular relates to a stress whitening-resistant reinforced toughened polypropylene compound and a preparation method thereof. The stress whitening-resistant reinforced toughened polypropylene compound is prepared by carrying out fusion, extrusion and granulation on polypropylene resin, filling master batch, an SBS elastomer, a chain segment accelerant, a chain segment binding agent, filling master batch, an antioxidant and a processing agent through a double-screw extruder. A coupling agent and a polypropylene graft are added in the filling master batch; the polypropylene resin is tightly combined with an inorganic filler interface so that the polypropylene resin and the inorganic filler interface are not easy to peel; in the formula, the toughness of the polypropylene compound is improved through the SBS elastomer; the chain segment accelerant and the chain segment binding agent play the role of a bridge, then the molecular chains are connected and the chain segments are formed into a network structure, so that movement of the inorganic filler is greatly constrained and the prepared polypropylene compound can have good rigidity and toughness besides favorable stress whitening resistance.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a stress whitening-resistant reinforced toughened polypropylene compound and a preparation method thereof. Background technique [0002] Polypropylene is one of the five general-purpose plastics and has been widely used in chemical industry, construction, light industry, automobile, home appliance, packaging and other industrial sectors. However, with the development of the industry, the requirements for material properties are getting higher and higher. Ordinary polypropylene must be modified to give it high performance in order to meet the needs. Due to the structural characteristics of polypropylene, polypropylene is susceptible to stress whitening due to external forces such as stretching, bending, and impact during use. In severe cases, it will also affect the performance and quality of the product. Therefore, in some household appliances, Applications...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/14C08L53/02C08K13/02C08K3/22C08K5/14C08K3/34C08J3/22
CPCC08J3/226C08J2323/12C08J2423/12C08L23/12C08L23/14C08L2205/03C08L2205/035C08L51/06C08L53/02C08K13/02C08K3/34C08K5/098C08K2003/2296
Inventor 杨磊刘乐文邵华杨泽何威
Owner SHANGHAI KINGFA SCI & TECH
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