TPV (Thermoplastic Vulcanizate) elastomeric material with improved electrical property

A thermoplastic elastomer and modifier technology, applied in the field of TPV elastomer materials, can solve the problems of no research on antistatic effect, decreased processing flow performance, and reduced elongation at break, so as to achieve good processing flow performance and good electrical stability Performance improvement, good antistatic effect

Active Publication Date: 2011-05-11
KINGFA SCI & TECH CO LTD +2
View PDF4 Cites 30 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tang Zhuo and others from Shanghai Rizhisheng used 4-8% conductive carbon black with high structure, and added polyethylene wax as a dispersant at the same time, and the surface resistivity of the material was reduced to 10%. 2 , but the invention did not conduct research on the antistatic effect of lower additions (such as less than 2%)
In addition, due to the poor compatibility between polyethylene wax and polypropylene, i

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] By weight, polypropylene 18%, EPDM rubber 32%, compatibilizer (PP-g-MAH) 1%, SP2045 crosslinking agent 5%, kaolin 12.8%, white mineral oil 25%, carbon nanotubes 2%, antioxidant (1010) 0.2%, polyethylene wax 2%, zinc oxide 1.5%, stearic acid 0.5%, mixed evenly, using twin-screw extrusion for dynamic vulcanization to prepare TPV elastomer materials with improved electrical properties, double The temperature setting of the heating zone of the screw extruder is: 160°C, 170°C, 180°C, 180°C, 180°C, 180°C, 180°C, 180°C, 180°C (the order is from the feeding port to the machine head), Speed ​​500rpm.

[0034] The above material is molded into a thin sheet with a thickness of 2mm under the condition of 180°C by a thermocompression molding machine, and the surface resistance of the material is 10 6 , The tensile strength is 7.2MPa, the elongation at break is 420%, and the MI is 6.2g / 10min.

[0035] The addition ratio of carbon nanotubes of the present embodiment is relatively sm...

Embodiment 2

[0037] By weight, 20% polypropylene, 40% EPDM rubber, 1% compatibilizer (PP-g-AA), 9.8% wollastonite, 17% naphthenic oil, 3% carbon nanotubes, cross-linked Auxiliary (SnCl 2 ) 2%, antioxidant (1076) 0.1%, antioxidant (168) 0.1%, polyethylene wax 3%, zinc oxide 0.8%, stearic acid 0.2%, mix evenly, use internal mixer at temperature 180-200 Premix A was prepared by melt kneading under the conditions of ℃ and rotating speed of 30 rpm.

[0038] Mix the above premix A with 3% phenolic resin SP1045 evenly, and use twin-screw extrusion for dynamic vulcanization to prepare TPV elastomer materials with improved electrical properties. The temperature in the heating zone of the twin-screw extruder is set at 160°C, 170°C, 180°C, 180°C, 180°C, 180°C, 180°C, 180°C, 180°C (the order is from the feed port to the machine head), the speed is 500rpm.

[0039] The above material is molded into a thin sheet with a thickness of 2mm under the condition of 180°C by a thermocompression molding machin...

Embodiment 3

[0042] 17% polypropylene, 30% EPDM rubber, 2% compatibilizer (PP-g-GMA), 10.8% talcum powder, 25% naphthenic oil, 5% carbon nanotubes, cross-linking assistant Additive (TAIC) 3%, antioxidant (1010) 0.2%, polyethylene wax 3%, zinc stearate 2%, mix evenly, use internal mixer at 180~200℃ to prepare premix by melting and kneading b.

[0043] Mix the above premix B with 2% DCP evenly, and use twin-screw extrusion for dynamic vulcanization to prepare TPV elastomer materials with improved electrical properties. The temperature in the heating zone of the twin-screw extruder is set at: 160°C, 170°C .

[0044] The above material is molded into a thin sheet with a thickness of 2mm under the condition of 180°C by a thermocompression molding machine, and the surface resistance of the material is 10 1 , The tensile strength is 5.2MPa, the elongation at break is 386%, and the MI is 2.6g / 10min.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Tensile strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a TPV (Thermoplastic Vulcanizate) elastomeric material with improved electrical property, comprising the following components in percentage by weight: 15%-60% of polypropylene, 20%-60% ethylene propylene terpolymer rubber, 0.5%-10% of high-molecular compatibilizers, 0.1%-40% of fillers, 1%-60% of rubber extending oil, 0.5%-10% of modifiers, 0.5%-10% of cross-linking agents, 0.1%-10% of cross-linking auxiliary agents, 0.01%-2% of antioxidants and 0.01%-10% of processing auxiliary agents. The invention enables the carbon nanotubes to be gathered on continuous PP (PropenePolymer) phases to form a continuous conductive network structure by adopting the carbon nanotubes as the modifiers and utilizing a principle that the special phase-stage structure of TPV and the high-molecular compatibilizers are completely compatible with PP but incompletely compatible with cross-linking rubber, thereby obtaining ideal electrical property improving effect; surface resistance isreduced to 106 when an addition amount is 2 percent, and the surface resistance is reduced to 102 when the addition amount is 5 percent, therefore the effect is far higher than that the effect of thecommon conductive carbon black; and in addition, the invention keeps good processing flow property, extends the application of the TPV in the field of antistatic materials and conductive materials and has extensive application prospect.

Description

technical field [0001] The invention relates to a TPV elastomer material. Background technique [0002] TPV is the abbreviation of Thermoplastic Vulcanization. The Chinese name is thermoplastic dynamic vulcanized elastomer or thermoplastic dynamic vulcanized rubber. It is an elastomer material composed of highly vulcanized rubber particles dispersed in a continuous plastic phase. TPV has physical properties and functional characteristics similar to thermosetting rubber at room temperature, and has the characteristics of thermoplastic melt flow and repeated processing at high temperature. It has the advantages of convenient molding and processing, recyclable materials, and excellent comprehensive performance. It has been widely used It is used in the fields of automobile industry, building materials, electronic appliances, medical and health care and consumer goods. [0003] With the continuous expansion of TPV application fields, the requirements for its performance are eas...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08L23/16C08L23/12C08K13/04C08K7/00C08K3/04
Inventor 阳范文肖鹏陶四平宁凯军叶南飚何浏伟
Owner KINGFA SCI & TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap