TPO (Thermoplastic Polyolefin) elastomer as well as preparation method and application thereof

A technology of thermoplastic elastomers and elastomers, applied in the field of waterproof membranes, TPO thermoplastic elastomers and their preparations, can solve the problems of non-dispersion, limited application range, limited compatibility, etc., and achieve excellent welding performance and overcome performance problems Insufficient effect

Active Publication Date: 2014-04-30
TIANJIN KINGFA NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional TPO waterproof membrane has limited compatibility between ethylene elastomer and polypropylene, and ethylene elastomer cannot achieve good dispersion with polypropylene, resulting in insufficient welding strength, low-temperature bendability and tear strength. range of application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] 20 kg of polypropylene PP T30S, 27 kg of polypropylene PP YPJ1215C, 50 kg of ethylene-octene copolymer POE 8842, 2.0 kg of styrene elastomer SEPTON 2002, 0.3 kg of heat stabilizer 1010, 0.3 kg of heat stabilizer 412S, 0.4 kg of weathering agent THT7001 was melted, mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 40:1. The temperature of each section of the extruder was set at 220-260 ° C, extruded and granulated to obtain TPO thermoplastic elastomer.

[0073] Test its performance according to the corresponding standards, the list is as follows:

[0074] Test items unit standard test Test Results density g / cm 3 ISO 1183 0.908 Weld line strength at 23℃ MPa ISO 527-2 / 5A / 50 8.9 Tensile breaking strength at 23°C MPa ISO 527-2 / 5A / 50 12.8 Elongation at break at 23°C % ISO 527-2 / 5A / 50 900 23°C Tear Strength KN / m ISO 34 85 -40℃ tear strength KN / m ISO 34 160 Flexibility at...

Embodiment 2

[0076] 20 kg of polypropylene PP S700, 24 kg of polypropylene PP AW191, 30 kg of ethylene-octene copolymer POE 7447, 25 kg of ethylene-propylene-butadiene elastomer EPDM 505, 4.5 kg of styrene-based elastomer SEPTON 2063, 0.5 kg of heat stabilizer 1010, 0.5 kg of heat stabilizer 627A, and 0.5 kg of UV-327 are melted, mixed and dispersed in a twin-screw extruder with an aspect ratio of 40:1, and the temperature of each section of the extruder is set at 220~260°C , extruded and granulated to obtain TPO thermoplastic elastomer.

[0077] Test its performance according to the corresponding standards, the list is as follows:

[0078] Test items unit standard test Test Results density g / cm 3 ISO 1183 0.909 Weld line strength at 23℃ MPa ISO 527-2 / 5A / 50 9.2 Tensile breaking strength at 23°C MPa ISO 527-2 / 5A / 50 12.1 Elongation at break at 23°C % ISO 527-2 / 5A / 50 1000 23°C Tear Strength KN / m ISO 34 89 -40℃ tear strength...

Embodiment 3

[0080] 20 kg of polypropylene PP S900, 20 kg of polypropylene PP AW191, 20 kg of ethylene-octene copolymer POE 7467, 31 kg of ethylene-propylene-butadiene elastomer EPDM 505, 7 kg of styrene-based elastomer SEBS 6006, 0.7 kg of heat stabilizer 1010, 0.7 kg of heat stabilizer 1076, and 0.6 kg of weather resistance agent THT7001 were melted, mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 40:1, and the temperature of each section of the extruder was set at 220~260°C , extruded and granulated to obtain TPO thermoplastic elastomer.

[0081] Test its performance according to the corresponding standards, the list is as follows:

[0082] Test items unit standard test Test Results density g / cm 3 ISO 1183 0.911 Weld line strength at 23℃ MPa ISO 527-2 / 5A / 50 9.7 Tensile breaking strength at 23°C MPa ISO 527-2 / 5A / 50 12.4 Elongation at break at 23°C % ISO 527-2 / 5A / 50 1200 23°C Tear Strength KN / m ...

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Abstract

The invention discloses a TPO elastomer. The TPO elastomer comprises the following ingredients in percentage by weight: 28-60 percent of polypropylene, 40-60 percent of an ethylene type elastomer, 2-10 percent of a compatilizer, 0-1 percent of a heat stabilizer and 0-1 percent of weather resisting agent, wherein the compatilizer is a styrene type elastomer. According to the TPO elastomer, the weld mark tensile strength is larger than or equal to 8.0MPa, the TPO elastomer can be repeatedly bended at -40 degrees centigrade for 10<3> times without generating cracks, the tear strength at 23 degrees centigrade is larger than or equal to 60KN / m, and the tear strength at -40 degrees centigrade is larger than or equal to 120KN / m; therefore, the TPO elastomer has excellent welding performance, low-temperature bending performance and tear strength, overcomes the shortcomings of the existing TPO elastomers in performance, and is particularly suitable for the requirements on waterproof coiled materials in the building industry.

Description

technical field [0001] The invention belongs to the field of polymer material molding and processing, and in particular relates to a TPO thermoplastic elastomer and its preparation method and application. The TPO thermoplastic elastomer is especially suitable for waterproof coiled materials. Background technique [0002] TPO waterproof membrane is thermoplastic polyolefin waterproof membrane. It is based on thermoplastic polyolefin (TPO) synthetic resin that combines ethylene elastomer and polypropylene with advanced polymerization technology, and adds antioxidant and weather resistance agent. Made of new waterproof membrane. [0003] TPO waterproof membrane combines the performance advantages of EPDM and PVC waterproof membrane, and has the weather resistance and low temperature temperature of the former and the weldability of the latter. This material is different from traditional plastics, showing high elasticity of rubber at normal temperature, and can be molded like p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L23/16C08L23/08C08L53/02
CPCC08L23/0815C08L23/16C08L2205/035C08L2205/08C08L2207/04C08L23/14C08L23/12C08L53/025C08L53/02
Inventor 刘奇祥肖华明王扬利李聪陶四平李东
Owner TIANJIN KINGFA NEW MATERIAL
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