Polypropylene composition for water-heater inner containers and preparation method thereof

A polypropylene composition, water heater liner technology, applied in the directions of fluid heaters, lighting and heating equipment, heating devices, etc., can solve the problem of not satisfying solar water heaters, etc., and achieve excellent inner surface gloss, low processing cost, room temperature and low temperature impact strength

Active Publication Date: 2010-08-25
SHANGHAI KINGFA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polypropylene compound does not meet all the requirements of solar water heaters, such as air drying

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] 50 kilograms of homopolypropylene PP B1101 (Taiwan Chemical), 30 kilograms of block copolymerized polypropylene PP B8101 (Yanshan Petrochemical), 20 kilograms of random copolymerized polypropylene PP R4220 (Yanshan Petrochemical), 0.5 kilograms of heat stabilizer Irganox 1010 ( CIBA Company), 0.5 kg of Irganox 168 (CIBA Company), 0.5 kg of processing aid EBS (Lubo Chemical), 0.01 kg of two (3,4-dimethylbenzylidene) sorbitol (DMDBS) (Peking University Fine Chemical Factory) and 0.3 kg of TMB-5 (Shanxi Institute of Chemical Industry) were melt-mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 40:1. The extrusion temperature was 200° C., extruded and granulated, and finally obtained a polypropylene material.

[0110] The above-mentioned polypropylene material has good impact strength at room temperature and low temperature, which solves the shortcoming of insufficient toughness of ordinary polypropylene, exhibits high toughness and ductility un...

Embodiment 2

[0119] With 70 kilograms of homopolypropylene PP S700 (Yangzi Petrochemical), 30 kilograms of random copolymerized polypropylene PPSM256 (Malaysian rattan), 0.5 kilogram of heat stabilizer Irganox 1010 (CIBA company), 0.5 kilogram of Irganox 168 (CIBA company), 0.5 kilogram Processing aid EBS (Lubo Chemical), 0.1 kg of β-nucleating agent TMB-5 (Shanxi Institute of Chemical Industry), 0.2 kg of α-type nucleating agent di(p-methylbenzylidene) sorbitol (MDBS) (Peking University Fine Chemical factory) in a twin-screw extruder with a length-to-diameter ratio of 40:1 to melt, mix and disperse at an extrusion temperature of 200°C, extrude and granulate, and finally obtain a polypropylene material.

[0120] The above-mentioned polypropylene material has good impact strength at room temperature and low temperature, which solves the shortcoming of insufficient toughness of ordinary polypropylene, exhibits high toughness and ductility under high-speed stretching, and is not easy to be bri...

Embodiment 3

[0129] With 60 kilograms of homopolypropylene PP YPJ3860 (Yangzi Petrochemical), 40 kilograms of block copolymerized polypropylene PPB8101 (Yanshan Petrochemical), 0.5 kilogram of thermal stabilizer Irganox 1010 (CIBA Company), 0.5 kilogram of Irganox 168 (CIBA Company), 0.5 kilogram Processing aid EBS (Lubo Chemical Industry), 0.5 kg of β-nucleating agent TMB-5 (Shanxi Institute of Chemical Industry), 0.4 kg of α-type nucleating agent dibenzylidene sorbitol (DBS) (Peking University Fine Chemical Factory) in the long diameter Melt, mix and disperse in a twin-screw extruder with a ratio of 40:1, extrude at a temperature of 200°C, extrude and granulate, and finally obtain a polypropylene material.

[0130] The above-mentioned polypropylene material has good impact strength at room temperature and low temperature, which solves the shortcoming of insufficient toughness of ordinary polypropylene, exhibits high toughness and ductility under high-speed stretching, and is not easy to b...

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Abstract

The invention provides a polypropylene composition for water-heater inner containers, which comprises the following components in portions by weight: (a) 100 portions of homopolymerized polypropylene; (b) 0.01-10 portions of thermal stabilizer; (c) 0.01-10 portions of processing aid; and (d) 0.01-10 portions of alpha-crystal form nucleating agent and/or beta-crystal form nucleating agent. The processing aid is selected from one or a plurality of low-molecular-weight ester compounds, metallic soap compounds, stearic acid-compounded ester compounds and amide compounds. The polypropylene material of the invention overcomes the defect of insufficient rigidity of the common polypropylene, and has the advantage of high heat distortion temperature; and the tensile strength is greater than or equal to 20 MPa, the elongation at break is greater than or equal to 300%, the bending modulus is greater than or equal to 1200 MPa, and the notch impact strength is greater than or equal to 30 Kj/m<2>.

Description

technical field [0001] The invention relates to a polypropylene compound for a water heater inner tank and a preparation method thereof, in particular to a civil and industrial solar water heater and an electric water heater inner tank compound 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 liner, the manufacturing process is relatively complicated: shearing plate-punching-drum-welding seam-welding various workpieces-insulation layer foaming, but its corrosion resistance, acid and alkali resistance is poor, easy to scale, welding parts are prone to high temperature Oxidation and corrosion will eventually cause water leakage in the water tank until the entire water heater is scrapped. Stainless steel materials have low pressure resistance, are prone to water leakage, poor heat preservation, and short life. The enamel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L53/00C08L23/14C08K5/00F24J2/46F24H9/00
CPCY02E10/40
Inventor 孙刚李扬周英辉丁超陈广强罗忠富
Owner SHANGHAI KINGFA SCI & TECH
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