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Transparent rigidity-and-toughness balanced thermoforming homo-polypropylene resin, and preparation method and application thereof

A homopolypropylene and thermoforming technology, which is applied in the field of polypropylene resin, can solve the problems that the improvement of polypropylene transparency is not ideal, the transparency improvement is not as good as that of sorbitol, and the thermoforming processing time is shortened to achieve the appearance. Good performance, short thermoforming cycle, low yellowness index effect

Pending Publication Date: 2019-12-17
东华能源(宁波)新材料有限公司 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the sorbitol nucleating agent can greatly improve the transparency of polypropylene, the yellow index of the polypropylene resin is higher due to the high addition amount. Molding and processing time, but the improvement of transparency is not as good as that of sorbitol. Substituted aryl heterocyclic phosphates can greatly improve the rigidity of polypropylene, but anisotropic shrinkage will cause greater warpage, and it is lower than acid absorbers. The cost of calcium stearate is poor in compatibility, and dehydroabietic acid salts are generally obtained by disproportionation and separation of ordinary rosin, which can effectively improve the mechanical properties of polypropylene, but the improvement of the transparency of polypropylene is not ideal, and makes polypropylene products Colored, branched amide-based transparent nucleating agents have not yet been commercially produced in large quantities
[0006] Therefore, at present, there is still a blank in China for homopolymer polypropylene thermoforming materials with high transparency, good balance of rigidity and toughness, good processability, and low cost, and there is a wide range of market application needs.

Method used

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  • Transparent rigidity-and-toughness balanced thermoforming homo-polypropylene resin, and preparation method and application thereof
  • Transparent rigidity-and-toughness balanced thermoforming homo-polypropylene resin, and preparation method and application thereof
  • Transparent rigidity-and-toughness balanced thermoforming homo-polypropylene resin, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In Catalyst SHAC TM 201. In the presence of cocatalyst triethylaluminum and external electron donor n-propyltrimethoxysilane, add propylene and hydrogen to the fully mixed Unipol gas-phase fluidized reactor for polymerization reaction, and control the temperature of the reactor during the reaction 70°C, reaction pressure 3.2MPa, hydrogen addition 3kg / h, propylene / hydrogen ratio 0.003, catalyst support flow rate 65kg / h, propylene feed 58000kg / h, cocatalyst / external electron donor ratio 8 , the co-catalyst / primary catalyst ratio is 44. The advanced control system controls the feeding amount of each material to maintain a constant component ratio, and the flow rate is stable. Real-time fine-tuning of the catalyst and propylene feeding amount ensures that the partial pressure of propylene is improved. Reactor load to 52t / h to obtain polypropylene powder.

Embodiment 2

[0032] In Catalyst SHAC TM 201. In the presence of cocatalyst triethylaluminum and external electron donor n-propyltrimethoxysilane, add propylene and hydrogen to the fully mixed Unipol gas-phase fluidized reactor for polymerization reaction, and control the temperature of the reactor during the reaction 70°C, reaction pressure 3.2MPa, hydrogen addition 3kg / h, propylene / hydrogen ratio 0.003, catalyst carrier flow rate 65kg / h, propylene feed 58000kg / h, cocatalyst / external electron donor ratio 14 , the co-catalyst / primary catalyst ratio is 44. The advanced control system controls the feeding amount of each material to maintain a constant component ratio, and the flow rate is stable. Real-time fine-tuning of the catalyst and propylene feeding amount ensures that the partial pressure of propylene is improved. Reactor load to 52t / h to obtain polypropylene powder.

Embodiment 3

[0034] In Catalyst SHAC TM201. In the presence of cocatalyst triethylaluminum and external electron donor n-propyltrimethoxysilane, add propylene and hydrogen to the fully mixed Unipol gas-phase fluidized reactor for polymerization reaction, and control the temperature of the reactor during the reaction 70°C, reaction pressure 3.2MPa, hydrogen addition 3kg / h, propylene / hydrogen ratio 0.003, catalyst carrier flow rate 65kg / h, propylene feed 58000kg / h, cocatalyst / external electron donor ratio 20 , the co-catalyst / primary catalyst ratio is 44. The advanced control system controls the feeding amount of each material to maintain a constant component ratio, and the flow rate is stable. Real-time fine-tuning of the catalyst and propylene feeding amount ensures that the partial pressure of propylene is improved. Reactor load to 52t / h to obtain polypropylene powder.

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Abstract

The invention discloses a transparent rigidity and toughness balanced thermoforming homo-polypropylene resin. The resin comprises polypropylene, a main antioxidant 1010, an auxiliary antioxidant 168,an acid acceptor calcium stearate and a nucleating agent. The invention also discloses a preparation method of the transparent rigidity and toughness balanced thermoforming homo-polypropylene resin. The method comprises the following steps: adding propylene and hydrogen into a Unipol gas phase fluidization reactor, carrying out a polymerization reaction in the presence of a main catalyst SHACTM 201, a cocatalyst triethyl aluminum and an external electron donor n-propyltrimethoxysilane, and adjusting the content of xylene-soluble substances in the obtained powder to obtain a polypropylene powder; and adding the main antioxidant 1010, the auxiliary antioxidant 168, the acid acceptor calcium stearate and the nucleating agent, performing mixing, and carrying out double-screw melt extrusion andgranulation to obtain the resin. The resin prepared in the invention has the advantages of excellent transparency, well balanced modulus and impact strength, specific content range of xylene-solublematters, high heat resistance and good processability.

Description

technical field [0001] The invention relates to a polypropylene resin, in particular to a transparent rigid-tough balance thermoformed homopolypropylene resin and a preparation method and application thereof. Background technique [0002] Thermoforming refers to the secondary molding technology that takes thermoplastic sheets as the molding object, and the molding method of hot pressing plates and sheets into semi-closed box-shaped parts to make polymer sheets. Specifically, by heating the thermoplastic sheet to soften it, pressure (vacuum or positive pressure) is used to make the thermoplastic sheet act on the surface of the mold, cooling and shaping, and a thin shell-shaped open product can be obtained after edge trimming. On the other hand, transparent thermoformed sheets are widely used as packaging materials for food, medical equipment, pharmaceuticals, electronic components, stationery, miscellaneous goods, and the like. With the increasing market of transparent therm...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08K5/00C08K5/1575C08K5/098C08F110/06C08F2/01
CPCC08K5/00C08K5/1575C08K5/098C08F110/06C08K2201/014C08L23/12C08F2/01
Inventor 陈强崔寅鑫王红英汪诗平王耀华薛宏魁喻秉俊程南南陈艺帆
Owner 东华能源(宁波)新材料有限公司
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