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Polypropylene composition for plastic inner container of water heater and preparation method thereof

A polypropylene composition and water heater technology, which can be used in heating devices, solar thermal devices, solar thermal power generation, etc., can solve the problems of high MFR, high cost, and unfavorable product blow molding of block copolymerized polypropylene, and achieve good rigidity. Toughness balance performance, low cost, not easy to be corroded

Active Publication Date: 2013-05-01
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the MFR of block copolymerized polypropylene is relatively high, which is not conducive to the blow molding of products, and the cost is high due to the addition of α-nucleating agent
[0006] Chinese patent CN 101851376A discloses a carbon-plastic modified polypropylene plastic, which can be used for blow molding solar water heater inner tanks. The formula system contains carbon-plastic fibers, and the cost is relatively high

Method used

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  • Polypropylene composition for plastic inner container of water heater and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Block copolymer polypropylene (MFR=0.40g / 10min): 95.0 parts;

[0027] Talc powder (2500 mesh): 5.0 parts;

[0028] Tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester: 0.2 parts;

[0029] 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene: 0.2 parts;

[0030] Tris(2,4-di-tert-butylphenyl)phosphite: 0.1 parts;

[0031] Calcium stearate: 0.1 parts.

Embodiment 2

[0033] Random copolymerized polypropylene (MFR=0.28g / 10min): 95.0 parts;

[0034] Talc powder (2500 mesh): 5.0 parts;

[0035] Tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester: 0.2 parts;

[0036] 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene: 0.2 parts;

[0037] Tris(2,4-di-tert-butylphenyl)phosphite: 0.1 parts;

[0038] Calcium stearate: 0.1 part.

Embodiment 3

[0040] Block copolymerized polypropylene (MFR=0.38g / 10min): 47.5 parts;

[0041] Random copolymerized polypropylene (MFR=0.25g / 10min): 47.5 parts;

[0042] Talc powder (3500 mesh): 5.0 parts;

[0043] Tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester: 0.3 parts;

[0044] 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene: 0.2 parts;

[0045] Tris(2,4-di-tert-butylphenyl)phosphite: 0.2 parts;

[0046] Calcium stearate: 0.1 part.

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Abstract

The invention relates to a polypropylene composition for a plastic inner container of a water heater and a preparation method thereof. The composition comprises (by weight) 85 to 95 parts of co-polypropylene, 5 to 15 parts of a filling material, 0.2 to 1 part of an anti-oxidant and 0.05 to 0.5 part of a processing aid. The polypropylene material prepared in the invention has the advantages of good balanced rigidity and toughness, a high load deformation temperature, excellent resistance to corrosion by acid and alkali, to thermo-oxidative aging and to water extraction, easy shaping through blow molding, low cost and good sanitation performance and overcomes the hidden trouble that a stainless steel inner container and an enamel inner container are easily corroded and leak water.

Description

technical field [0001] The invention relates to a polypropylene composition for a water heater plastic liner and a preparation method thereof, in particular to a solar water heater plastic liner and a preparation method thereof. Background technique [0002] At present, water heaters on the market mainly have two inner tank materials, stainless steel inner tank and enamel inner tank. Stainless steel inner tank, the manufacturing process is more complicated: shearing plate-punching-drum-welding seam-welding various workpieces-insulation layer foaming, and its corrosion resistance, poor acid and alkali resistance, easy to scale, welding parts are prone to high temperature Oxidation and corrosion will eventually cause the water tank to leak until the entire water heater is scrapped. The enamel liner is made by coating and burning a layer of inorganic ceramic glaze on the ordinary steel plate. The cost is high, the processing technology is high, and air bubbles or pinholes are ...

Claims

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Application Information

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IPC IPC(8): C08L23/14C08L53/00C08K13/06C08K9/06C08K9/04C08K3/34C08K3/26C08K5/13C08K5/524B29B9/06F24J2/46
CPCY02E10/40
Inventor 崔红跃王艳芳李秀全
Owner CHINA PETROLEUM & CHEM CORP
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