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Composite processing adjuvant for polyolefin and preparation method and use thereof

A composite processing aid and polyolefin technology, applied in the field of polymer molding processing, can solve the problems of high price, high cost, complex preparation process of fluorosilicon polymer and boron nitride, etc., achieve low price, increase output, improve Effect of Critical Shear Rate

Inactive Publication Date: 2004-03-17
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the preparation process of fluorosilicon polymer and boron nitride is complicated, and the price is relatively expensive, and the cost is relatively high when used as a polymer processing aid.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 50 grams of polyethylene glycol with a molecular weight of 6000 into a two-roller mixer, slowly add 100 grams of diatomite with a particle size of 5 μm at a temperature of 70 ° C, mix for 20 minutes, and then discharge the material, crush it with a pulverizer, and prepare A compound processing aid (PPA-1) was obtained.

Embodiment 2

[0029] Add 500 grams of polyethylene glycol with a molecular weight of 6,000 and 1,500 grams of talc powder with a particle size of 10 μm into a high-speed kneader, stir and mix at a temperature of 70°C for 20 minutes, then discharge the material, and pulverize it with a pulverizer to obtain a compound processing aid (PPA-2).

Embodiment 3

[0031] Add 80 grams of polyethylene glycol with a molecular weight of 20,000 and 200 grams of diatomite with a particle size of 38 μm into the internal mixer, mix at a temperature of 70 ° C for 20 minutes, and then discharge the material, crush it with a pulverizer, and obtain a composite processing aid agent (PPA-3).

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PUM

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Abstract

The composite processing assistant for polyolefin is prepared with polymer lubricating agent in 10-100 portions and inorganic stuffing in 10-100 portions and through stirring and mixing in high speedkneading machine or double-roller mixer at 70-80 deg. For 10-30 min. The composite processing assistant and polyolefin are molten and mixed homogeneously at 120-200 deg.c, and the mixture is then extruded in an extruder. The measurement with constant-rate type high pressure capillary rheometer at 190-200 deg.c shows that the composite processing assistant can lower the extrusion pressure, torque and melt viscosity obviously and raise the quality of extruding formation. The composite processing assistant is especially suitable for forming of metallocene linear low-density polyethylene and polyolefin.

Description

1. Technical field [0001] The invention relates to a composite processing aid for polyolefin, a preparation method and application thereof, and belongs to the field of polymer molding processing. 2. Background technology [0002] Polyolefin is the largest variety among the three major synthetic materials. In 2000, the world's polyolefin production capacity reached 80Mt / year, with an average annual growth rate of about 5%, ranking first in general-purpose synthetic resins. Polyolefin is also the largest user of ethylene and propylene, the basic organic raw materials of petrochemical industry. 50% of foreign ethylene production is used to produce polyethylene, while propylene is used as a raw material for polypropylene as high as 57%. Therefore, foreign large-scale petrochemical companies have invested huge sums of money in the development of polyolefin technology in order to obtain greater returns. This is the main reason for the continuous and rapid development of polyolef...

Claims

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Application Information

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IPC IPC(8): C08K3/26C08K3/36C08L23/02
Inventor 李惠林刘小龙
Owner SICHUAN UNIV
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