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Organic montmorillonite (OMMT) and method for modifying polypropylene resin by using same

A technology of organic montmorillonite and sodium-based montmorillonite, applied in the field of organic montmorillonite and its modified polypropylene resin, can solve problems such as unfavorable dispersion, and achieve the advantages of improving affinity, increasing tensile strength and increasing crystallization temperature. Effect

Inactive Publication Date: 2014-12-24
TIANJIN LISHUN PLASTIC PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When montmorillonite is added as nanoparticles to polymers such as polystyrene and polyamide, composite materials with excellent performance are obtained, but the hydrophilic and oleophobic properties of a large number of inorganic ions contained in the interlayer are not conducive to its polymerization. Decentralization of things

Method used

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  • Organic montmorillonite (OMMT) and method for modifying polypropylene resin by using same

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preparation example Construction

[0011] Preparation method of organic montmorillonite: 1) Add sodium-based montmorillonite into distilled water, stir and heat to 80 degrees, add cetyltrimethylammonium bromide aqueous solution dropwise, stop heating after 4 hours to wash away residual halide ions , Vacuum drying to constant weight, crushing and sieving to obtain modified organic montmorillonite CMMT; 2) adding the organic montmorillonite CMMT prepared in step 1) and epoxy resin in a mass ratio of 19:1 into a mortar, Grind under infrared for 1 hour, dry at 160°C for 3 hours, vacuum dry and sieve to obtain the secondary modified organic montmorillonite EMMT; 3) The secondary modified organic montmorillonite EMMT prepared in step 2) Add phorone diisocyanate to a mortar at a mass ratio of 17:1, grind under infrared for 1 hour, dry at 75 degrees for 3 hours, vacuum dry and sieve to obtain the third modified organic montmorillonite IMMT; 4) Step 3) The prepared tertiary modified organic montmorillonite IMMT and octad...

Embodiment 1

[0015] The weight percentages of each component are: 0.1% fixed antioxidant, 0.5% lubricant, organic montmorillonite OMMT 0, and polypropylene 99.4%; the materials in the above weight percentages are added to the high-speed mixer and mixed evenly; the mixed materials enter the extrusion Machine, a 180 degree twin-screw extruder melted and pelletized to obtain unmodified polypropylene resin masterbatch 1.

Embodiment 2

[0017] The weight percentages of each component are: 0.1% of fixed antioxidant, 0.5% of lubricant, 1% of organic montmorillonite OMMT, and 99.4% of polypropylene; the materials in the above weight percentage are added to the high-speed mixer and mixed evenly; the mixed materials enter the extrusion Out of the machine, a 180-degree twin-screw extruder melted and pelletized to obtain a modified polypropylene resin masterbatch 2.

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Abstract

The invention relates to a preparation method of organic montmorillonite (OMMT), which comprises the following step: sequentially modifying sodium-base montmorillonite with cetyl trimethylammonium bromide, epoxy resin, isophorone diisocyanate and octadecylamine to obtain the OMMT. The invention also relates to a technique for modifying a polypropylene resin by using the OMMT, which comprises the following steps: 1) preparing the following components in percentage by weight: 0.1% of immobilized antioxidant, 0.5% of lubricant, 1-5% of OMMT and 98.4-89.4% of polypropylene; 2) adding the materials into a high-speed mixer according to the percentage by weight, and uniformly mixing; and 3) sending the uniform mixture into an extruder, and carrying out melt granulation to obtain the OMMT-modified polypropylene resin master batch. Under the heterogeneous nucleation action of the OMMT, the crystallization temperature of the polypropylene is enhanced. Due to the nano effect, the polypropylene is toughened and reinforced; and the OMMT and polypropylene macromolecular chain have strong interfacial action, thereby enhancing the tensile strength of the polypropylene.

Description

Technical field [0001] The invention relates to the field of polymer materials, in particular to an organic montmorillonite and a method for modifying polypropylene resin. Background technique [0002] Polypropylene is a kind of thermoplastic general-purpose plastic with excellent comprehensive properties. It has the advantages of easy processing, low density, and low production cost. All methods used in household appliances, daily packaging, automobile manufacturing and other industries. However, its shortcomings such as low heat distortion temperature and low-temperature brittleness restrict its application as engineering stress materials. To broaden its application range, polypropylene must be modified. Commonly used modification methods include chlorinated polypropylene, polypropylene graft modification, polypropylene crosslinking modification, polypropylene filling and blending. In recent years, there have been many studies on nano-particles filled and blended modified poly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/04C08K3/34C08L23/12
Inventor 窦华利
Owner TIANJIN LISHUN PLASTIC PRODS
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