In-situ microfibrillar polypropylene series resin composite foamed particles and application thereof

A polypropylene resin and composite foaming technology, applied in the field of foaming materials, can solve the problem of high in-mold molding pressure, and achieve the effects of high production efficiency, automatic production and high rigidity

Active Publication Date: 2015-09-02
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problem in the prior art that the in-mold molding pressure is high in order to improve the rigidity of polypropylene-based resin foamed particles, and to provide a kind of in-situ microfibrillated polypropylene-based resin composite foamed particles and its application

Method used

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  • In-situ microfibrillar polypropylene series resin composite foamed particles and application thereof
  • In-situ microfibrillar polypropylene series resin composite foamed particles and application thereof

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Embodiment 1-12

[0033] Preparation of in-situ microfibrillated polypropylene resin composite foam particles:

[0034] Step 1. According to the composition and proportion of Table 1, add 100 parts by weight of matrix resin and fiber-forming resin to the extruder, heat to melt, and extrude the melt linearly. The melt is thermally stretched, quenched, and pelletized to obtain in-situ microfibrillated polypropylene blended resin particles with a diameter of 1 mm, a length of 1.8 mm, and an average weight of 1.8 mg;

[0035] Step 2: Add 100 parts by weight (1000 g) of the above-mentioned in-situ microfibrillated polypropylene blend resin particles, 300 parts by weight of water, 0.05 parts by weight of sodium dodecylbenzenesulfonate, and 0.3 parts by weight of kaolin to a 5L autoclave and carbon dioxide (the carbon dioxide charged ensures that the pressure in the autoclave at the foaming temperature is 6MPa), while stirring, the temperature is raised to a temperature 5°C lower than the foaming temp...

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Abstract

The invention discloses in-situ microfibrillar polypropylene series resin composite foamed particles and application thereof, and belongs to the technical field of foaming materials. By adopting the in-situ microfibrillar polypropylene series resin composite foamed particles, the technical problem of high in-mold forming pressure of polypropylene series resin foamed particles caused by improving the rigidity of the polypropylene series resin foamed particles in the prior art can be solved. The composite foamed particles are prepared from in-situ microfibrillar polypropylene mixed resin particles by using a dispersion medium release process, wherein the in-situ microfibrillar polypropylene mixed resin particles comprise matrix resin and fiber-forming resin, the diameters of the in-situ microfibrillar polypropylene mixed resin particles are 0.5-2mm, the heights are 1-2 times that of the diameters, the matrix resin is polypropylene series resin, the melting temperature of the fiber-forming resin is more than that of the matrix resin, the fiber-forming resin is not completely compatible with the matrix resin, and the mass percentage of the fiber-forming resin is 1-30%. According to the composite foamed particles disclosed by the invention, the in-mold forming pressure cannot be increased, the composite foamed particles can be formed by using a general forming machine, the preparation cost cannot be increased, and an obtained foam forming body has relatively high rigidity and is smooth in surface.

Description

technical field [0001] The invention belongs to the technical field of foaming materials, and in particular relates to an in-situ microfibrillated polypropylene resin composite foaming particle and an application thereof. Background technique [0002] In recent years, especially in the automotive field, there has been a strong desire to develop lightweight and highly rigid non-crosslinked polypropylene-based resin foamed particle molded articles, and studies using highly rigid polypropylene-based resins are being conducted. The higher the melting point of the polypropylene-based resin tends to be the higher the rigidity, so the rigidity of the polypropylene-based resin is generally increased by enhancing the melting point of the polypropylene-based resin. However, in order to mold the expanded particles with high rigidity polypropylene resin as the base resin in the mold, a higher steam pressure is required, especially when the melting point of the polypropylene resin reache...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/14C08J9/12C08L23/16C08L23/14C08L23/08C08L77/00C08L67/02C08L69/00C08L81/02C08K3/34
Inventor 唐涛邢海平邱健姜治伟谭海英
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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