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High-strength transparent polypropylene and preparation method thereof

A transparent polypropylene and high-strength technology, applied in the field of polymers, can solve the problems of small strength improvement of polypropylene materials and great influence on the transparency of polypropylene.

Active Publication Date: 2020-10-20
WANHUA CHEM (SICHUAN) CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN 103030886 A "A transparent polypropylene and its preparation method" uses sorbitol and organic phosphate transparent nucleating agents to modify polypropylene, although the two nucleating agents can improve the transparency of polypropylene materials Good, but still a small strength gain for polypropylene
Chinese patent CN 101759929 B "a high-transparency, high-flow toughened polypropylene material and its preparation method" and Chinese patent CN105566770 A "shock-resistant high-transparency polypropylene composition and its preparation method" both adopt the addition of different types of polyolefin elastomers method to improve the mechanical strength of polypropylene, but because this method adds a lot of components, it has a great impact on the transparency of polypropylene

Method used

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  • High-strength transparent polypropylene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Preparation of polypropylene imine modified nano-silica:

[0051] Activate 2g of nano-silica in 10g of nitric acid solution with a concentration of 1mol / L, the activation temperature is 60°C, and the activation time is 6h; then, in a nitrogen atmosphere, add 150ml of toluene, 5ml of 3-chloropropyltriethoxysilane and 2g of activated nano-silica was reacted at 100°C for 48h, the solid was separated, and dried at 50°C for 12h; finally, the dried solid was added to 60wt% polypropyleneimine aqueous solution, and then 100ml of methanol was added, and dried at 60°C After reacting for 24 hours, polypropyleneimine-modified nano-silica was obtained.

[0052] Preparation of high-strength transparent polypropylene (parts by mass):

[0053] Weigh 100 parts of polypropylene, 0.1 part of bis-1,3,2,4 (4'-propylbenzylidene) 1-propyl sorbitol nucleating agent, 1 part of polypropylene imine modified nano-silica , 0.02 part of polypropylene grafted maleic anhydride, 0.1 part of antioxida...

Embodiment 2

[0056] Preparation of polypropylene imine modified nano-silica:

[0057] Activate 2g of nano-silica in 10g of nitric acid solution with a concentration of 0.5mol / L, the activation temperature is 50°C, and the activation time is 4h; then, in a nitrogen atmosphere, add 150ml of toluene and 5ml of 3-chloropropyltriethoxysilane React with 2g of activated nano-silica at 90°C for 24h, separate the solid, and dry at 50°C for 12h; finally, add the dried solid to 60wt% polypropyleneimine aqueous solution, add 100ml of methanol, and then dry at 30°C °C for 12 hours to obtain polypropyleneimine-modified nano-silica.

[0058] Preparation of high-strength transparent polypropylene (parts by mass):

[0059] Weigh 100 parts of polypropylene, 0.2 parts of bis-1,3,2,4 (4'-propylbenzylidene) 1-propyl sorbitol nucleating agent, 2 parts of polypropylene imine modified nano-silica , 0.02 part of polypropylene grafted maleic anhydride, 0.2 part of antioxidant;

[0060] Put each raw material in a...

Embodiment 3

[0062] Preparation of polypropylene imine modified nano-silica:

[0063] Activate 2g of nano-silica in 10g of nitric acid solution with a concentration of 2mol / L, the activation temperature is 80°C, and the activation time is 7h; then, in a nitrogen atmosphere, add 150ml of toluene, 5ml of 3-chloropropyltriethoxysilane and 2g of activated nano-silica was reacted at 120°C for 60h, the solid was separated, and dried at 50°C for 12h; finally, the dried solid was added to 60wt% polypropyleneimine aqueous solution, 100ml of methanol was added, and then dried at 60°C After reacting for 36 hours, polypropyleneimine-modified nano-silica was obtained.

[0064] Preparation of high-strength transparent polypropylene (parts by mass):

[0065] Weigh 100 parts of polypropylene, 0.2 parts of bis-1,3,2,4 (4'-propylbenzylidene) 1-propyl sorbitol nucleating agent, 3 parts of polypropylene imine modified nano-silica , 0.06 part of polypropylene grafted maleic anhydride, 0.3 part of antioxidant...

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Abstract

The invention discloses high-strength transparent polypropylene and a preparation method thereof. The polypropylene is prepared from the following raw materials in parts by mass: 100 parts of polypropylene, 1 to 6 parts of polypropyleneimine-modified nanometer silicon dioxide, 0.01 to 0.1 part of polypropylene grafted maleic anhydride, 0.1 to 1 part of a nucleating agent and 0.1 to 0.6 part of anantioxidant. The preparation method comprises the following steps: premixing polypropyleneimine-modified nanometer silicon dioxide, polypropylene grafted maleic anhydride, the nucleating agent, the antioxidant and polypropylene resin, and carrying out extrusion granulation at 180-230 DEG C by virtue of an extruder so as to obtain the modified polypropylene. The polypropylene resin has good transparency, heat resistance, tensile strength and impact strength, and can be widely applied to the fields of thin-wall injection molding transparent meal boxes and the like.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a high-strength transparent polypropylene and a preparation method thereof. Background technique [0002] As a translucent crystalline material with excellent performance, polypropylene can be used to prepare transparent materials after adding nucleating agents. It is widely used in thermoforming, fresh-keeping boxes, household products and other fields. At present, the thin-walled injection-molded polypropylene in the domestic market is mostly ordinary transparent polypropylene material, and there are often problems such as low transparency and poor mechanical strength in thin-walled and highly transparent products. In order to improve the transparency of polypropylene, the method of adding a nucleating agent is generally used to promote the crystallization of polypropylene, reduce the crystal size, and then improve the transparency of the product. However, different types of n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L51/06C08K13/06C08K9/02C08K9/06C08K9/04C08K3/36C08K5/1575C08K5/134C08K5/526
CPCC08L23/12C08L2201/10C08L2201/08C08L2205/24C08L51/06C08K13/06C08K9/02C08K9/06C08K9/08C08K3/36C08K5/1575C08K5/1345C08K5/526
Inventor 牛奇徐彦龙吴庆虎黄舜尧蓝程程高晴晴秦中宇朱文俊李允升张宏科
Owner WANHUA CHEM (SICHUAN) CO LTD
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