Formula and processing technology of PP-R pipe

A PP-R and pipe technology, applied in the field of PP-R pipe formulation and processing technology, can solve the problems of low rigidity and crystallinity, increased generation of random polypropylene, wide melting temperature, etc., and achieves good transparency and molding processing. Good properties and wide melting temperature

Inactive Publication Date: 2014-08-06
ANHUI WEIXING PIPE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

resulting in increased production of atactic polypropylene
The performance characteristics of random copolymerized polypropylene: with the increase of ethylene content, its stiffness and impact strength are improved, the melting temperature is wide during processing, and the molding processability is good. Its products have toughness, cold resistance, high impact performance and transparency. Good characteristics, but its melting point, embrittlement point, rigidity and crystallinity are low

Method used

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Experimental program
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Embodiment Construction

[0014] The invention is a PP-R pipe material formula, including random copolymerized polypropylene, tetraerythritol ester, nucleating agent TMB-4 and auxiliary antioxidant DLTP, wherein: random copolymerized polypropylene content is 97%-99.65%, The content of tetraerythritol ester is 0.1%-1%, the content of auxiliary antioxidant DLTP is 0.2%-1.5%, and the content of nucleating agent TMB-4 is 0.05%-0.5%.

[0015] The present invention selects random copolymerized polypropylene as the main material, and the auxiliary materials used should have good compatibility with special resins and can make up for some deficiencies of special resins. The auxiliary materials include tetraerythritol ester, auxiliary antioxidant DLTP, and nucleation Agent TMB-4, its performance is as follows:

[0016] Tetraerythritol Vinegar: white powder, melting point 119-122 degrees Celsius, slightly toxic, non-volatile, non-polluting, good heat resistance, this antioxidant has good anti-oxidation effect, an...

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PUM

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Abstract

The invention discloses a formula and processing technology of a PP-R pipe. The PP-R pipe comprises the following components: 97%-99.65% of polypropylene randon coplymer, 0.1%-1% of pentaerythritol ester, 0.2%-1.5% of auxiliary antioxygen DLTP and 0.05%-0.5% of a nucleator TMB-4. According to the formula and the processing technology of the PP-R pipe, the melting temperature range is wide during processing, and the forming machinability is good. Besides, the PP-R pipe has the advantages of good toughness and cold-resistance, high impact property and better transparency, and also has the following properties of a polypropylene pipe including resistance to acid, alkali, chemical corrosion, heat, low temperature, impact, ageing and light.

Description

technical field [0001] The invention relates to the field of PP-R pipes, in particular to a PP-R pipe formula and processing technology. Background technique [0002] Ethylene / propylene random copolymer is produced by simultaneous polymerization of ethylene molecules and propylene molecules, using the same reactor as that used to produce PP homopolymer. Ethylene molecules are smaller than propylene molecules and react faster (approximately ten times more reactive) than propylene. This makes the catalyst less stereospecific and more active. As a result, the generation of atactic polypropylene increases. The performance characteristics of random copolymerized polypropylene: with the increase of ethylene content, its stiffness and impact strength are improved, the melting temperature is wide during processing, and the molding processability is good. Its products have toughness, cold resistance, high impact performance and transparency. Good and other characteristics, but its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08K5/10C08K5/372B29C47/00
CPCC08K5/10B29C48/00C08K5/372C08L2201/08C08L2201/10C08L2203/18C08L2207/14C08L23/14
Inventor 蒋伟斌
Owner ANHUI WEIXING PIPE IND
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