Preparation method of transparent polypropylene

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...

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, high cost, and waste liquid pollution generated in the production process. A method for in-situ reaction of acid salt in polypropylene melt to generate transparent nucleating agent in situ to obtain high transparency and high gloss polypropylene

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