Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Modified polypropylene material, preparation method and applications thereof

A polypropylene material and polypropylene technology, applied in the field of modified polypropylene material and preparation, can solve the problems of material whitening under stress, affecting the appearance and performance of products, and being too late to make a normal response, so as to improve the resistance to stress whitening. , Good stress whitening resistance, improve the effect of stress whitening of parts

Inactive Publication Date: 2013-06-19
HEFEI GENIUS NEW MATERIALS
View PDF4 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Plastic is a polymer material, its molecular chains are very long, and the plastic molecular chains are intertwined with each other, which has a certain strength and hardness; but under a large external force (such as fast shearing force or pulling force), the molecular chains have no time to do it. Therefore, it can only be highly oriented in the direction of the external force (regularly folded and arranged) to absorb the energy of the external force, but if the external force is large enough and the action time is short enough, the highly oriented molecular chains are still too late to absorb such a large power, so it It will be further oriented in the direction of the external force to produce silver crazes or shear bands to further absorb huge power. After enough silver crazes and shear bands are generated, a large number of holes will be generated on the stress-bearing surface of the material, and this area will refract Index decreases, so stress whitening occurs
[0004] When modified PP is used for injection molding products, especially when large-scale parts are injected, such as automobile door panels, instrument panels and other products, the ejector rod or assembly is prone to stress concentration, and the material appears stress whitening at this position, which affects the appearance and performance of the product. , resulting in product failure

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Modified polypropylene material, preparation method and applications thereof
  • Modified polypropylene material, preparation method and applications thereof
  • Modified polypropylene material, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] With 75.8 parts of polypropylene, 17.5 parts of mineral talcum powder with a particle size of 10 microns, 5 parts of propylene-ethylene copolymer elastomer with 9% ethylene content and 25% crystallinity of polypropylene as the toughening agent, silane coupling 0.1 part of agent KH-550, 0.2 part of main antioxidant 10100, 0.2 part of auxiliary antioxidant 168, 0.5 part of light stabilizer 770, 0.3 part of scratch-resistant agent erucamide, 0.4 part of processing aid calcium stearate, put Mix in a high-speed mixer for 5 minutes, then add the mixture to a twin-screw extruder for extrusion. The temperature of each section of the barrel of the twin-screw extruder is set as follows: 180°C for zone 1, 185°C for zone 2, 195°C for zone 3, 195°C for zone 4, 200°C for zone 5, 200°C for zone 6, and 205°C for the die. The extruded strips were cooled to room temperature through a circulating water tank, dried by a blower, and then pelletized in a pelletizer to obtain a modified polyp...

Embodiment 2

[0039] With 68.6 parts of polypropylene, 20 parts of mineral talcum powder with a particle size of 5 microns, 10 parts of propylene-ethylene copolymer elastomer with 11% ethylene content and 18% crystallinity of polypropylene as the toughening agent, silane coupling 0.2 parts of agent KH-550, 10100.1 parts of main antioxidant, 0.1 part of auxiliary antioxidant 168, 0.3 part of light stabilizer 770, 0.4 part of scratch-resistant agent erucamide, 0.3 part of processing aid calcium stearate, put Mix in a high-speed mixer for 5 minutes, then put the mixture into a twin-screw extruder for extrusion. The temperature of each section of the barrel of the twin-screw extruder is set as follows: 180°C for zone 1, 190°C for zone 2, 195°C for zone 3, 200°C for zone 4, 205°C for zone 5, 210°C for zone 6, and 215°C for the die. The extruded strips were cooled to room temperature through a circulating water tank, dried by a blower, and then pelletized in a pelletizer to obtain a modified poly...

Embodiment 3

[0042] 58 parts of polypropylene, 25 parts of mineral talcum powder with a particle size of 2 microns, 15 parts of propylene-ethylene copolymer elastomer with 15% ethylene content and 5% crystallinity of polypropylene as the toughening agent, silane coupling 0.3 parts of agent KH-550, 0.1 parts of main antioxidant 1010, 0.2 parts of auxiliary antioxidant 168, 0.4 parts of light stabilizer 770, 0.5 parts of scratch-resistant agent erucamide, 0.5 parts of processing aid calcium stearate, Put it into a high-speed mixer and mix for 5 minutes, then put the mixture into a twin-screw extruder for extrusion. The temperature of each section of the barrel of the twin-screw extruder is set as follows: the first zone is 200°C, the second zone is 205°C, the third zone is 205°C, the fourth zone is 210°C, the fifth zone is 215°C, the sixth zone is 225°C, and the head is 230°C. The extruded strips were cooled to room temperature through a circulating water tank, dried by a blower, and then pe...

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
Flexural modulusaaaaaaaaaa
Izod notched impact strengthaaaaaaaaaa
Melt indexaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of polymer material modification and processing, and discloses a modified polypropylene material, a preparation method and applications thereof. The modified polypropylene material is prepared from the following components, by weight, 58-84 parts of polypropylene, 10-25 parts of a mineral, 5-15 parts of a toughening agent, 0.1-0.3 part of a coupling agent, 0.2-0.4 part of an antioxidant, 0.1-0.5 part of a light stabilizer, 0.3-0.5 part of a scratch-resistance agent, and 0.3-0.5 part of a processing additive. The modified polypropylene material preparation method comprises: adding 58-84 parts by weight of polypropylene, 10-25 parts by weight of a mineral, 5-15 parts by weight of a toughening agent, 0.1-0.3 part by weight of a coupling agent, 0.2-0.4 part by weight of an antioxidant, 0.1-0.5 part by weight of a light stabilizer, 0.3-0.5 part by weight of a scratch-resistance agent, and 0.3-0.5 part by weight of a processing additive to a high speed mixer to mix for 3-5 min; adding the obtained mixture to an extruder to extrude, wherein the extruder barrel temperature is controlled to a range of 180-230 DEG C; carrying out extrusion cooling to achieve a room temperature, and drying; and adding into a granulator to carry out granulation to obtain the modified polypropylene material. The modified polypropylene material has excellent stress whitening resistance and can be adopted as vehicle inner decoration parts.

Description

technical field [0001] The invention belongs to the technical field of polymer material modification and processing, and relates to a modified polypropylene material, a preparation method and an application thereof. Background technique [0002] Polypropylene (PP) is a thermoplastic with low density, high surface hardness, high elasticity, good heat resistance, chemical stability, and good insulation. It is widely used in many fields such as production and life. In the automotive industry, household appliances and machinery fields, the application range of modified polypropylene materials is constantly expanding, and the technical requirements for modified polypropylene are also getting higher and higher. [0003] Plastic is a polymer material, its molecular chains are very long, and the plastic molecular chains are intertwined with each other, which has a certain strength and hardness; but under a large external force (such as fast shearing force or pulling force), the mole...

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): C08L23/14C08L23/12C08L23/16C08K13/02C08K5/20C08K3/34C08K3/26C08K3/30
Inventor 宋伟华
Owner HEFEI GENIUS NEW MATERIALS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com