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

Dealkalized red mud-containing flame-retardant polyvinyl plastic and preparation method thereof

A flame retardant polyethylene, dealkalization red mud technology, applied in the field of comprehensive utilization and flame retardant plastic, red mud dealkalization, to simplify dealkalization treatment process, improve compatibility, improve flame retardant effect

Inactive Publication Date: 2011-05-25
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF1 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to reduce the problem of serious environmental pollution when red mud is used as a flame retardant in the prior art, and propose a flame-retardant polyethylene plastic containing dealkalized red mud and its preparation method

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

[0022] 1) 150g of red mud is pulverized, dried, and ground through a 550-mesh sieve;

[0023] 2) Add the sieved red mud, 70g polyethylene and 30g maleic anhydride grafted polyethylene into a mixer for melt blending, and then process it with a flat vulcanizer to obtain a flame-retardant polyethylene plastic product. Smooth plastic appearance;

[0024] The melt index of polyethylene in above-mentioned steps 2) is 8g / 10min; The graft rate of maleic anhydride grafted polyethylene is 7.5%;

[0025] In the above step 2), the processing temperature of the kneader is 150°C; the processing temperature of the flat vulcanizer is 120°C, the heating time is 8min, and the pressure is 20MPa;

[0026] The flame-retardant polyethylene plastic prepared by the above method has a pH value of 9.5, a limiting oxygen index of 26.3%, a tensile strength of 10.5 MPa, an elongation at break of 30%, and good processability and thermal stability.

Embodiment 2

[0028] 1) 150g of red mud is pulverized, dried, and ground through a 550-mesh sieve;

[0029] 2) Add the sieved red mud, 70g polyethylene and 30g ethylene-vinyl acetate copolymer into a mixer for melt blending, and then process it with a flat vulcanizer to obtain a flame-retardant polyethylene plastic. Smooth appearance;

[0030] The melt index of polyethylene in the above step 2) is 8g / 10min; the mass percentage of vinyl in the ethylene-vinyl acetate copolymer is 28%.

[0031] In the above step 2), the processing temperature of the mixing machine is 150° C.; the processing and molding temperature of the flat vulcanizer is 120° C., the heating time is 8 minutes, and the pressure is 20 MPa.

[0032] The flame-retardant polyethylene plastic prepared by the above method has a pH value of 10.0, a limiting oxygen index of 25.8%, a tensile strength of 9.2 MPa, an elongation at break of 27%, and good processability and thermal stability.

Embodiment 3

[0034] 1) 150g of red mud is pulverized, dried, and ground through a 550-mesh sieve;

[0035] 2) Put the sieved red mud, 70g polyethylene and 30g ethylene-acrylic acid copolymer into the mixer for melt blending, and then process it with a flat vulcanizer to obtain a flame-retardant polyethylene plastic with a smooth appearance ;

[0036] The melt index of polyethylene in the above step 2) is 8g / 10min; the mass percentage of acrylic acid in the ethylene-acrylic acid copolymer is 10.3%.

[0037] In the above step 2), the processing temperature of the mixing machine is 150° C.; the processing and molding temperature of the flat vulcanizer is 120° C., the heating time is 8 minutes, and the pressure is 20 MPa.

[0038] The flame-retardant polyethylene plastic prepared by the above method has a pH value of 9.8, a limiting oxygen index of 25.6%, a tensile strength of 13.2 MPa, an elongation at break of 38%, and good processability and thermal stability.

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
Melt indexaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to dealkalized red mud-containing flame-retardant polyvinyl plastic and a preparation method thereof, and belongs to the technical fields of dealkalization and comprehensive utilization of red mud and flame-retardant plastic. Polyethylene and an in-situ dealkalizing agent are used as resin bases, and the red mud is used as a flame retardant. The method comprises the following steps of: crushing the red mud; drying; grinding and sieving; adding the red mud into an internal mixer with the polyethylene and the in-situ dealkalizing agent for melting and internal mixing; and machine-shaping with a flat vulcanizing machine to obtain a flame-retardant polyvinyl plastic finished product, wherein the plastic has smooth appearance, the pH value is between 9 and 11, and the limiting oxygen index ranges from 23 to 31 percent. The polyvinyl plastic prepared by the method is suitable for fire disaster safety protection in important public places in the fields of electronic appliances, building materials and traffic; a dealkalization process used for the red mud serving as the flame retardant is simplified by in-situ dealkalization; the in-situ dealkalizing agent can effectively reduce the alkalinity of the red mud, improve the flame-retardant effect and improve the compatibility between the red mud and the polyethylene base; and the polyvinyl plastic is low in cost and causes small damage to environment.

Description

technical field [0001] The invention relates to a flame-retardant polyethylene plastic containing dealkalized red mud and a preparation method thereof, belonging to the technical fields of dealkalization and comprehensive utilization of red mud and flame-retardant plastics. Background technique [0002] Red mud is the waste residue produced in the alumina production process. It is red because it contains a lot of iron oxide, so it is called red mud. The amount of red mud produced in my country's alumina production process exceeds 6 million tons every year, all of which are stored in the open air, not only occupying a large amount of land, but also the alkali in the red mud permeates underground, causing pollution of groundwater and soil, and endangering the ecology environment. Therefore, it is of great significance to study the comprehensive utilization of red mud. [0003] Red mud contains renewable oxides and a variety of useful metal elements, which become the basis for...

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): C08L23/06C08L51/06C08L31/04C08L23/08C08K3/36C08K3/22
Inventor 杜建新郝建薇孟杰吴红应李晓勇
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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