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

Preparation method of halogen-free flame-retardant toughening polypropylene composite material

A composite material, polypropylene technology, applied in the field of polypropylene composite material preparation, can solve the problem of reducing the flame retardant performance and thermal stability performance of the composite material system, the processing performance of the composite material, the negative impact of mechanical properties, and the deterioration of the mechanical toughness of the matrix polymer. and other problems, to achieve the effect of overcoming the decline of mechanical toughness, good processing performance and low production cost

Inactive Publication Date: 2012-09-19
SOUTHWEST JIAOTONG UNIV
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its flame retardant efficiency is low, and a larger filling amount (>60%) is usually required to meet the flame retardant requirements of plastics; and the interface bonding force between magnesium hydroxide inorganic particles and polypropylene is very small, and the compatibility is very poor. The dispersion in polypropylene is very uneven; thus, it has a great negative impact on the processing performance and mechanical properties of the composite material, especially the severe deterioration of the mechanical toughness of the matrix polymer.
[0003] In the prior art, the surface modification treatment of magnesium hydroxide particles is usually used. This method can improve the interfacial adhesion between the inorganic particles and the polymer matrix material to a certain extent, thereby improving the compatibility of the system, and then improving the composite. The mechanical properties of the material, but the improvement is limited
Some technologies use rubber or elastomers, such as nitrile rubber, EPDM, etc., to improve the mechanical toughness of the system, but to a certain extent, it will reduce the flame retardancy and thermal stability of the composite system, limiting the polypropylene Application as a flame retardant material in various industries

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
  • Preparation method of halogen-free flame-retardant toughening polypropylene composite material
  • Preparation method of halogen-free flame-retardant toughening polypropylene composite material
  • Preparation method of halogen-free flame-retardant toughening polypropylene composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A specific embodiment of the present invention is a preparation method of a halogen-free flame-retardant toughened polypropylene composite material, the specific method of which is as follows:

[0021] 1. Put 100 parts of dried magnesium hydroxide in a high-speed stirrer, then spray 2.0 parts of silane coupling agent on the surface of magnesium hydroxide, and stir for 30 minutes at a temperature of 100°C. Be 2000rpm, obtain modified magnesium hydroxide;

[0022] II, the modified magnesium hydroxide that step I obtains and 80 parts of weight dry polypropylenes, 18 parts weight dry polyolefin elastomers, 2.0 parts weight polyolefin elastomer graft maleic anhydride-styrene, 0.05 parts Heavy antioxidant, 0.1 part of heavy lubricant, placed in a mixer and mixed uniformly to obtain a compound;

[0023] III. Mix and granulate the mixture obtained in step II in a twin-screw extruder, dry the extruded pellets and inject them on an injection molding machine.

Embodiment 2

[0025] A method for preparing a halogen-free flame-retardant and toughened polypropylene composite material, the specific method of which is:

[0026] 1. Place 100 parts of dried magnesium hydroxide in a high-speed stirrer, then spray 2.0 parts of silane coupling agent on the surface of magnesium hydroxide, and stir for 25 minutes at a temperature of 80°C. Be 1800rpm, obtain modified magnesium hydroxide;

[0027] II, the modified magnesium hydroxide that step I obtains and 79 parts by weight of dry polypropylene, 20 parts of weight of dry polyolefin elastomer, 1.0 part of weight of polyolefin elastomer grafted maleic anhydride-styrene, 0.05 part Heavy antioxidant 0.1 part of heavy lubricant is placed in a mixer and mixed evenly to obtain a compound;

[0028] III. Mix and granulate the mixture obtained in step II in a twin-screw extruder, dry the extruded pellets and inject them on an injection molding machine.

Embodiment 3

[0030] A method for preparing a halogen-free flame-retardant and toughened polypropylene composite material, the specific method of which is:

[0031] 1. Place 100 parts of dried magnesium hydroxide in a high-speed stirrer, then spray 2.0 parts of silane coupling agent on the surface of magnesium hydroxide, and stir for 35 minutes at a temperature of 120°C. Be 1500rpm, obtain modified magnesium hydroxide;

[0032] II, the modified magnesium hydroxide that step I obtains and 80 parts by weight of dry polypropylene, 18.5 parts of weight of dry polyolefin elastomer, 1.5 parts of weight of polyolefin elastomer graft maleic anhydride-styrene, 0.05 part Heavy antioxidant 0.1 part of heavy lubricant is placed in a mixer and mixed evenly to obtain a compound;

[0033] III. Mix and granulate the mixture obtained in step II in a twin-screw extruder, dry the extruded pellets and inject them on an injection molding machine.

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

No PUM Login to View More

Abstract

The invention discloses a preparation method of halogen-free flame-retardant toughening polypropylene composite material, which mainly comprises the steps of: carrying out surface modification on 100 parts by weight of magnesium hydroxide by 2.0 parts by weight of surface modifier in a high-speed mixer, wherein the modification temperature is 80-120 DEG C, the time is 25-35min and the rotating speed is 1500-2000rpm; evenly mixing the modified magnesium hydroxide with 77-80 parts by weight of dry polypropylene, 17-20 parts by weight of dry polyolefin elastomer, 1.0-3.0 parts of by weight of maleic anhydride graft copolymer, 0.05 parts by weight of antioxidant and 0.1 parts of lubricating agent to obtain mixture; and then, mixing and pelleting the mixture in a double-screw extruder, drying the extruded aggregates and carrying out injection molding on the aggregates in an injection molding machine. The method is simple in technology and good in repeatability; and the prepared halogen-free flame-retardant toughening polypropylene composite material has good mechanical toughness and flame-retardant property.

Description

technical field [0001] The invention relates to a method for preparing a halogen-free flame-retardant polypropylene composite material with high toughness. Background technique [0002] Polypropylene (PP) is a thermoplastic with excellent comprehensive properties and widely used in industries such as electronic appliances, instrumentation, automobiles and construction. However, its application fields are greatly limited due to its shortcomings such as flammability and molten dripping, so it is necessary to carry out flame retardant treatment on it. Among the many types of flame retardants, magnesium hydroxide (MH) has the characteristics of not producing corrosive halogen gas and harmful gas, non-volatile, long-lasting effect, non-toxic, smoke-free, and non-melting droplets, etc., and has been widely valued. However, its flame retardant efficiency is low, and a larger filling amount (>60%) is usually required to meet the flame retardant requirements of plastics; and the ...

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): C08L23/12C08L51/06C08L23/00C08K9/04C08K9/06C08K3/22
Inventor 陈晓浪于杰徐阳孙志丹胡书春张志斌
Owner SOUTHWEST JIAOTONG UNIV
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