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Acrylic resin with high bath strength, and preparation method

A technology of polypropylene resin and high melt strength, which is applied in the field of high melt strength polypropylene resin and its preparation, can solve the problems of reducing the mechanical properties of polypropylene, and achieve the effect of saving manpower

Active Publication Date: 2009-01-07
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the introduction of peroxides will degrade polypropylene to a great extent, greatly reducing the mechanical properties of polypropylene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 2994 grams of polypropylene as 99.8% by weight, weigh 3 grams of vinyl polybutadiene with a vinyl content molar ratio of 96%, and weigh 0.1% by weight of trimethylolpropane 3 g of triacrylate was uniformly mixed in a mixer for 20 minutes, and then added to a twin-screw extruder with L / D=40 and Φ of 35 mm. It is divided into four heating zones, in which the temperature of the first heating zone is set to 190 °C, the temperature of the second heating zone is set to 210 °C, the temperature of the third heating zone is set to 240 °C, and the temperature of the fourth heating zone is set to 220 °C. Pelletizing to obtain high melt strength polypropylene resin. Some samples were taken for performance testing and melt strength determination. The results are shown in Table 1.

Embodiment 2

[0026] Weigh 2940 grams of polypropylene as 98% by weight, 30 grams of vinyl polybutadiene with a vinyl content molar ratio of 96% as 1% by weight, and trimethylolpropane as 1% by weight 30 grams of triacrylate was uniformly mixed in a mixer for 20 minutes, and then added to a twin-screw extruder with L / D=40 and Φ of 35 mm. It is divided into four heating zones, in which the temperature of the first heating zone is set to 200 °C, the temperature of the second heating zone is set to 200 °C, the temperature of the third heating zone is set to 200 °C, and the temperature of the fourth heating zone is set to 200 °C. Pelletizing to obtain high melt strength polypropylene resin. Some samples were taken for performance testing and melt strength determination. The results are shown in Table 1.

Embodiment 3

[0028] Weigh out 2910 grams of polypropylene as 97% by weight, 60 grams of vinyl polybutadiene with a vinyl content molar ratio of 96% as 2% by weight, and trimethylolpropane as 1% by weight 30 grams of triacrylate was uniformly mixed in a mixer for 20 minutes, and then added to a twin-screw extruder with L / D=40 and Φ of 35 mm. It is divided into four heating zones, in which the temperature of the first heating zone is set to 200 °C, the temperature of the second heating zone is set to 240 °C, the temperature of the third heating zone is set to 240 °C, and the temperature of the fourth heating zone is set to 210 °C. Pelletizing to obtain high melt strength polypropylene resin. Some samples were taken for performance testing and melt strength determination. The results are shown in Table 1.

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PUM

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Abstract

This invention relates to a method for preparing polypropylene resin with high melt strength. The polypropylene resin is composed of: component A 70-99.8 wt.%, component B 0.1-29.9 wt.% (preferential 0.1-20 wt.%), and component C 0..1-25 wt.% (preferential 0.1-10 wt.%). Component A is natural polypropylene resin. Component B is vinyl polybutadiene. Component C is acrylate compound. The method comprises: uniformly mixing the above components, loading into a melt-grafting reactor, and melt-grafting at 190-240 deg.C to obtain polypropylene resin with high melt strength. The obtained polypropylene resin has high melt strength without sacrifice of mechanical properties.

Description

technical field [0001] The invention relates to a high melt strength polypropylene resin and a preparation method thereof Background technique [0002] Polypropylene is a general-purpose plastic that is widely used. It has many excellent properties, such as low relative density, tasteless and odorless, edible oil resistance, excellent corrosion resistance, good electrical properties and chemical stability, and low price and large output. , second only to PVC and PE. However, polypropylene has poor toughness, brittle fracture at low temperature, and low thermal deformation temperature; and the chain structure of polypropylene is linear. In the molten state, polypropylene has no strain hardening effect, resulting in low melt strength and poor sag resistance. disadvantages, thus greatly limiting the application of polypropylene. At the same time, the softening point of polypropylene is close to the melting point. When the temperature is higher than the melting point, its melt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F255/02B29C47/00
Inventor 唐涛毕务国王艳辉
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI