Preparation method of transparent polypropylene

A technology of transparent polypropylene and polypropylene, which is applied in the field of high-transparency and high-gloss polypropylene, can solve the problems of long production cycle, complicated process, waste liquid pollution, etc., and achieve the effect of low production cost, simple process and high gloss

Inactive Publication Date: 2007-04-18
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a method using rosin-based resin acid and high-grade fat in order to overcome the disadvantages of long preparation cycle of rosin acid-type nucleating agent, complex process, low yield,

Method used

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  • Preparation method of transparent polypropylene
  • Preparation method of transparent polypropylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 500 grams of homopolypropylene powder (MFR=11.6g / 10min), 1.5 grams of sodium stearate, 1.5 grams of dehydroabietic acid and 0.75 grams of antioxidant (B215) were mixed in a high mixer for 5 minutes and then extruded Granulation, melt extrusion temperature is 190℃~210℃. The obtained pellets were injected into standard samples for haze, gloss, tensile strength and flexural modulus tests. The results are listed in Table 1.

Embodiment 2

[0028] 500 grams of homopolypropylene powder (MFR=11.6g / 10min), 1.0 grams of sodium stearate, 1.0 grams of dehydroabietic acid and 0.75 grams of antioxidant (B215) were mixed in a high mixer for 5 minutes and then extruded Granulation, melt extrusion temperature is 190℃~210℃. The obtained pellets were injected into standard samples for haze, gloss, tensile strength and flexural modulus tests. The results are listed in Table 1.

Embodiment 3

[0030] 500 grams of homopolypropylene powder (MFR=11.6g / 10min), 2.0 grams of sodium stearate, 2.0 grams of dehydroabietic acid and 0.75 grams of antioxidant (B215) were mixed in a high mixer for 5 minutes and then extruded Granulation, melt extrusion temperature is 190℃~210℃. The obtained pellets were injected into standard samples for haze, gloss, tensile strength and flexural modulus tests. The results are listed in Table 1.

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Abstract

This invention relates to a preparation of high transparent, high gloss polypropylene, especially relates to a method which is through reaction in situ of rosin based resin acids and higher fatty acid, on the spot generate transparent nucleater, accordingly obtain high transparent, high gloss polypropylene. It is produced by melt extrusion granulation at 190-210DEG C with 100 quality copies polypropylene, 0.1-0.8 quality copies rosin based resin acids, 0.1-0.8 quality copies higher fatty acid and 0.1-0.3 quality copies oxidation inhibitor. The required nucleater is generated by reaction in situ with rosin based resin acids and higher fatty acid in processing. This method is low cost, easy to implement, no pollution, produced preparation is high transparent and high gloss, tensile strength and rigidity is elevated, and can't cause preparation abnormal flavour and xanthochromia.

Description

Technical field [0001] The invention relates to a method for preparing high-transparency and high-gloss polypropylene, in particular to the in-situ reaction of rosin-based resin acids and higher fatty acid salts to generate a transparent nucleating agent in situ to obtain high-transparency and high-gloss polypropylene method. Background technique [0002] Polypropylene is a semi-crystalline resin that is easy to process, has excellent performance, is cheap, and is widely used. Adding a transparent nucleating agent in industrial production can improve transparency and obtain transparent polypropylene products. At present, the transparent agents sold in the market mainly include two categories: sorbitol and organic phosphate. Sorbitol-based transparent agents are the most widely used varieties at present, and they will decompose at the processing temperature, making the product yellow, producing peculiar smell, and corroding the processing equipment at the same time. New Nip...

Claims

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Application Information

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IPC IPC(8): C08L23/10C08L93/04C08K5/09B29B9/12B29C47/40
Inventor 窦强王静波
Owner NANJING UNIV OF TECH
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