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

Method for preparing polystyrene with low heat conductivity

A technology of polystyrene and thermal conductivity, which is applied in the field of polystyrene preparation, can solve the problems of poor mechanical properties of polystyrene plastic, a large amount of black smoke, and poor thermal insulation performance, etc., and achieves strong controllability of the preparation process, mechanical Excellent performance and excellent flame retardancy

Inactive Publication Date: 2014-08-06
JIANGSU SAIBAOLONG PETROCHEM
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, since styrene is a rigid foam with a closed-cell structure with C and H as the main elements, its limiting oxygen index is low and its thermal conductivity is high. It can not only burn at a lower temperature, but also Once it catches fire, it will burn violently, and the flame will spread to the entire surface at a high speed, making the base material highly shrink and melt, and will not be charred. At the same time, a large amount of black smoke, toxic gas and molten droplets with open flame will be produced, which will lead to more serious burning.
[0004] In the prior art, in order to make polystyrene plastics have good flame retardancy while maintaining heat, flame retardants are usually coated on the surface of polystyrene plastics, but the compatibility of flame retardants with polystyrene is poor , the mechanical properties of the obtained polystyrene plastic are poor, and it is difficult to meet the requirements for the use of external wall insulation materials
If the flame retardant is directly added in the preparation of polystyrene, not only the thermal conductivity will increase, the thermal insulation performance will deteriorate, but also a series of safety problems will be brought

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

[0032] A preparation method of polystyrene with low thermal conductivity, the specific steps are:

[0033] (1) Add polystyrene materials to the pre-reforming reactor, including 65% styrene monomers, 25% ethylene copolymers and 10% auxiliary additives, and polymerize styrene monomers to form polystyrene; The polymerization was carried out to a conversion rate of 62% of the phase inversion initiation point of the formed styrene-ethylene copolymer-polystyrene mixture; wherein auxiliary auxiliary agents included 75% compatibilizer, 20% stabilizer and 5% white Oil.

[0034] (2) Separating the styrene-ethylene copolymer-polystyrene mixture formed in step (1) to generate a first stream comprising 64wt% of the mixture formed in step (1) and comprising the remainder formed The second stream of the mixture in step (1).

[0035] (3) Adding the first stream to the second reactor for further styrene polymerization, causing phase inversion of the first stream.

[0036] (4), invert the fi...

Embodiment 2

[0043] A preparation method of polystyrene with low thermal conductivity, the specific steps are:

[0044](1) Add polystyrene materials to the pre-reforming reactor, including 72% styrene monomer, 20% ethylene copolymer and 8% auxiliary additives, and polymerize styrene monomer to form polystyrene; The polymerization is carried out to a conversion rate of 85% of the phase inversion initiation point of the formed styrene-ethylene copolymer-polystyrene mixture; wherein auxiliary auxiliary agents include 80% compatibilizer, 10% stabilizer and 10% white Oil.

[0045] (2) Separating the styrene-ethylene copolymer-polystyrene mixture formed in step (1) to generate a first stream comprising 82wt% of the mixture formed in step (1) and comprising the remainder formed The second stream of the mixture in step (1).

[0046] (3) Adding the first stream to the second reactor for further styrene polymerization, causing phase inversion of the first stream.

[0047] (4), invert the first st...

Embodiment 3

[0054] A preparation method of polystyrene with low thermal conductivity, the specific steps are:

[0055] (1) Add polystyrene materials to the pre-reforming reactor, including 80% styrene monomer, 15% ethylene copolymer and 5% auxiliary additives, and polymerize styrene monomer to form polystyrene; The polymerization is carried out to a conversion rate of 95% of the phase inversion initiation point of the formed styrene-ethylene copolymer-polystyrene mixture; wherein auxiliary auxiliary agents include 85% compatibilizer, 10% stabilizer and 5% white Oil.

[0056] (2) Separating the styrene-ethylene copolymer-polystyrene mixture formed in step (1) to generate a first stream comprising 95wt% of the mixture formed in step (1) and comprising the remainder formed The second stream of the mixture in step (1).

[0057] (3) Adding the first stream to the second reactor for further styrene polymerization, causing phase inversion of the first stream.

[0058] (4), invert the first st...

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 provides a method for preparing polystyrene with low heat conductivity. The method comprises the following steps: preparing a mixture of phenethylene, ethylene copolymer and polystyrene; separating and converting the mixture, and preparing a polystyrene colloid; adding heat insulating materials and flame-retardant materials in a reaction kettle; cooling down for discharging, washing, and drying to obtain polystyrene beads; foaming, slaking and molding to obtain polystyrene with the low heat conductivity. The method has the characteristics that the preparation technology is strong in controllability, and the polystyrene obtained by the method is good in heat preservation, favorable in flame retardancy, good in mechanical property and long in service life.

Description

technical field [0001] The invention belongs to the field of chemical material processing, and in particular relates to a preparation method of polystyrene with low thermal conductivity. Background technique [0002] Polystyrene refers to a polymer synthesized by free radical addition polymerization of styrene monomer. It is a colorless and transparent thermoplastic. It is cheap and easy to process. It is widely used as insulation material for building exterior walls. [0003] However, since styrene is a rigid foam with a closed-cell structure with C and H as the main elements, its limiting oxygen index is low and its thermal conductivity is high. It can not only burn at a lower temperature, but also Once ignited, it will burn violently, and the flame will spread to the entire surface at a high speed, causing the substrate to shrink and melt to a high degree, and will not be charred. At the same time, a large amount of black smoke, toxic gas and molten droplets with open fl...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08F212/08C08K13/04C08K7/12C08K7/02C08K3/34C08K7/10C08K3/32C08K5/01C08J9/04
Inventor 蒋武锋王诗遥梅春明
Owner JIANGSU SAIBAOLONG PETROCHEM
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