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Special high-density polyethylene compound for automobile windshield washer and preparation method thereof

A technology of high-density polyethylene and washing pots, which is applied in the field of polymer materials and their molding processing, can solve the problems of poor rigidity and heat resistance, and the decline of heat resistance of washing pots, and achieve aging resistance and good mechanical properties As well as the effect of heat resistance and excellent high temperature aging resistance

Inactive Publication Date: 2014-04-09
SHANGHAI KINGFA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of LLDPE must be large to ensure that the ESCR performance of HDPE is significantly improved, but the rigidity and heat resistance of LLDPE are very poor, and the working environment temperature of the car washing pot can reach up to 80 ° C. Too much addition will cause washing Decreased heat resistance of pot

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A special high-density polyethylene compound for car washing jugs, composed of HDPE, LLDPE, ESCR synergist and heat stabilizer. The preparation method is as follows: 81.5 kg of HDPE HXM50100, 15 kg of LLPDE7050, 3 kg of hydrogenated styrene-isoprene-styrene SEPTON2002, 0.25 kg of phenolic heat stabilizer 1010, and 0.25 kg of phosphite heat stabilizer 168 in Melt, mix and disperse in a twin-screw extruder with an aspect ratio of 1:40, set the temperature of each section of the extruder at 210°C, extrude and granulate, and finally obtain a high-density polyethylene compound for car washing pots. The performance is as follows:

[0022] performance

Embodiment 2

[0024] A special high-density polyethylene compound for car washing jugs, composed of HDPE, LLDPE, ESCR synergist and heat stabilizer. The preparation method is as follows: 85.4 kg of HDPE5421B, 10 kg of LLPDELL101AA, 4 kg of poly-1-butene PB-1DP8911M, 0.3 kg of phenolic heat stabilizer 1010, 0.3 kg of phosphite heat stabilizer 168 at an aspect ratio of 1 : 40 in a twin-screw extruder for melting, mixing and dispersing, the temperature of each section of the extruder is set at 210°C, extruded and granulated, and finally a high-density polyethylene compound for car washing pots is obtained. The performance is as follows:

[0025] performance

Embodiment 3

[0027] A special high-density polyethylene compound for car washing jugs, composed of HDPE, LLDPE, ESCR synergist and heat stabilizer. The preparation method is as follows: 87 kg of HDPE5421D, 7 kg of LLPDE1802, 5 kg of ethylene-vinyl acetate copolymer EVA460, 0.5 kg of phenolic heat stabilizer 1010, 0.5 kg of phosphite heat stabilizer 168 at an aspect ratio of 1 : 40 in a twin-screw extruder for melting, mixing and dispersing, the temperature of each section of the extruder is set at 210°C, extruded and granulated, and finally a high-density polyethylene compound for car washing pots is obtained. The performance is as follows:

[0028] performance

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PUM

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Abstract

The invention provides a special high-density polyethylene compound for an automobile windshield washer and a preparation method thereof. The special high-density polyethylene compound for the automobile windshield washer is characterized by consisting of 59-100wt% of HDPE (High-Density Polyethylene), 0-30wt% of LLDPE (Linear Low-Density Polyethylene), 0-10wt% of ESCR (Environmental Stress Crack Resistance) synergist and 0-1wt% of heat stabilizer. The special high-density polyethylene compound for the automobile windshield washer disclosed by the invention has excellent ESCR performance as well as good mechanical properties and heat resistance. As proved by detection, the tensile strength (at 23 degrees centigrade) is not smaller than 24 MPa, the elongation at break is not smaller than 600%, the vicat softening temperature (10N) is not smaller than 120 degrees centigrade, and ESCR (GB / T1842-C) is not smaller than 200 h.

Description

technical field [0001] The invention relates to a special high-density polyethylene compound for car washing jugs and a preparation method thereof, which belongs to the field of polymer materials and their molding and processing. Background technique [0002] The car washing pot is filled with surfactant washing liquid, which plays the role of cleaning the windshield of the car. At present, the car washing pot is mainly prepared by high-density polyethylene (HDPE) blow molding method, but the environmental stress cracking resistance (ESCR) of HDPE is generally poor, and the stress concentration of the product is concentrated under the action of surfactant washing liquid during use. The part of the surface is likely to reduce the surface energy and cause internal and external stress to cause crack expansion, resulting in liquid leakage. Linear low-density polyethylene (LLDPE) has excellent ESCR performance, and its ESCR performance is even hundreds of times that of high-dens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L23/16C08L23/20C08L9/02C08L53/02
CPCC08L23/06C08L2201/08C08L2205/03C08L2207/062
Inventor 孙刚陈延安李国明李志平程文超周英辉
Owner SHANGHAI KINGFA SCI & TECH
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