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Composition for preparing polypropylene foam material and foamed molded body thereof

A foaming material, polypropylene technology, applied in the field of high melt strength impact polypropylene injection foam molding and its preparation, can solve the problems of limitation, low melt strength, cell distribution, uneven pore size, etc. , to achieve the effect of improving rigidity and toughness, high melt strength

Active Publication Date: 2019-02-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low melt strength and poor impact resistance of traditional general-purpose polypropylene, when used for injection foaming material preparation and post-processing molding, there are cell distribution, uneven pore size, and poor mechanical properties. question
[0007] The homopolypropylene or random copolymerized polypropylene prepared in the prior art often cannot have both high melt strength and impact resistance, and also lacks properties such as rigidity and toughness. Therefore, the polypropylene material prepared based on this The performance and application of polypropylene injection foam materials are still limited

Method used

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  • Composition for preparing polypropylene foam material and foamed molded body thereof
  • Composition for preparing polypropylene foam material and foamed molded body thereof
  • Composition for preparing polypropylene foam material and foamed molded body thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0104] Preparation of polypropylene base resin HMSPP701:

[0105] The propylene polymerization reaction is carried out on a polypropylene unit, and the main equipment of the unit includes a prepolymerization reactor, a first loop reactor, a second loop reactor and a third gas phase reactor. The polymerization method and steps are as follows.

[0106] (1) Prepolymerization reaction

[0107] The main catalyst (DQC-401 catalyst, provided by Beijing Aoda Branch of Sinopec Catalyst Company), co-catalyst (triethylaluminum), and the first external electron donor (isopropylcyclopentyldimethoxysilane, IPCPMS) were After pre-contacting at 6°C for 20 minutes, it is continuously fed into a continuous stirred tank prepolymerization reactor for prepolymerization. The flow of triethylaluminum (TEA) entering the prepolymerization reactor is 6.33g / hr, the flow of isopropylcyclopentyldimethoxysilane is 0.3g / hr, the flow of main catalyst is 0.6g / hr, TEA / IPCPMS The ratio is 50 (mol / mol). The ...

Embodiment 1-10

[0123] Preparation of polypropylene base resin

[0124] The high melt strength impact polypropylenes HMSPP701, HMSPP702, HMSPP703 and HMSPP704 used as base resins were respectively prepared according to the above preparation methods of HMSPP701, HMSPP702, HMSPP703 and HMSPP704.

[0125] Preparation of Polypropylene Base Resin Microparticles

[0126] According to the formula of Examples 1-10 shown in Table 3, respectively put high-melt strength impact polypropylene, cell nucleating agent and processing aid into a high-speed mixer and mix at high speed for 30 seconds, and then add Lab100 microparticles to prepare system, the torque is controlled at about 65%, and the speed is 300rpm. The cell nucleating agent is silicon dioxide, and the dosage is shown in Table 3. The processing aids include Antioxidant 1010 (BASF Company), Antioxidant 168 (BASF Company), etc., and the amount used is conventional, that is, 0.2 and 0.1 parts by weight relative to 100 parts by weight of the poly...

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Abstract

The invention provides a composition used for preparing a polypropylene foaming material. The composition comprises high melt-strength impact-resistant polypropylene as base resin, the high melt-strength impact-resistant polypropylene comprises a propylene homopolymer component and an ethylene-1-butylene copolymer component, and the ratio of room-temperature trichlorobenzene soluble Mw of the high melt-strength impact-resistant polypropylene to room-temperature trichlorobenzene insoluble Mw of the high melt-strength impact-resistant polypropylene is greater than 0.5 and is smaller than or equal to 1; and the content of the room-temperature xylene soluble substance is greater than 10 wt% and is less than 30 wt%. The invention also provides a polypropylene injection foaming formed body prepared by the composition through injection foaming and a preparation method thereof. The formed body is suitable for the fields of parts with special shape requirements for internal and external decoration in automobile, aircraft and high-speed rail.

Description

technical field [0001] The invention relates to the field of macromolecular materials, in particular to an injection foaming molding of high melt strength impact polypropylene and a preparation method thereof. Background technique [0002] Polymer foam contains extremely small air cells and a thin air film covering the air cells. Due to the high volume ratio of gas, it has good heat insulation, cushioning, and floatability, and is cost-effective, so it can be used in a wide range of fields. In recent years, polypropylene resin foaming materials have been widely used in thermal insulation building materials, automotive components, packaging cushioning materials and other fields due to their good performance and cost balance, and can be recycled. [0003] The methods for preparing polypropylene foam mainly include bead method and extrusion method. The former uses foaming agents such as carbon dioxide or hydrocarbons in a pressurized airtight container to impregnate polypropyl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/08C08K13/02C08K3/36C08K3/34C08J9/12B29C45/76
CPCB29C45/76C08J9/122C08J2203/182C08J2323/12C08L23/12C08L2205/24C08L2314/02C08L23/0815C08K13/02C08K5/1345C08K5/526C08K5/098C08K3/36C08K3/34
Inventor 郭鹏吕明福张师军徐耀辉高达利权慧邹浩吕芸邵静波毕福勇
Owner CHINA PETROLEUM & CHEM CORP
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