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Flame-retardant EPS foam material as well as preparation method and application thereof

A foam material and flame-retardant technology, which is applied in the field of flame-retardant EPS foam material and its preparation, can solve problems such as droplet dripping, threat to life and property safety, and impact on the application of polystyrene, so as to increase flame retardancy Effect

Active Publication Date: 2020-09-11
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although polystyrene has many excellent properties and is widely used in production and life, polystyrene is easy to burn, and a large amount of molten droplets will be produced when burning, accompanied by a large amount of black smoke, which poses a threat to people's lives and property safety. It is a huge threat, which affects the application of polystyrene to a certain extent. Therefore, polystyrene plastics must be treated with flame retardants for better practical applications

Method used

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  • Flame-retardant EPS foam material as well as preparation method and application thereof
  • Flame-retardant EPS foam material as well as preparation method and application thereof
  • Flame-retardant EPS foam material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0040] The preparation of preparation example 1 melamine resin prepolymer

[0041] Add 20 mL of deionized water into the three-necked flask equipped with a reflux condensing device, add 10 g of melamine and 25 mL of formaldehyde with a mass concentration of 37% into the three-necked flask, stir and mix evenly, adjust the pH of the system to 8.0 with triethanolamine, and heat up to 70 ℃, stir at 200r / min until the mixed solution is completely transparent, keep it warm for 30 minutes, and cool down to room temperature to prepare a transparent and viscous melamine resin prepolymer solution for later use.

preparation example 2

[0042] Preparation Example 2 Preparation of Surface Modified Microencapsulated Flame Retardant

[0043] S1: Stir and disperse 10g of magnesium hydroxide (MH) and 5g of aluminum hydroxide (ATH) into 10g of bis(2-ethylhexyl) phosphate, stir thoroughly for 3-5min until the dispersion is uniform, and then add polyborosilicate Oxygen 10g and triphenyl phosphate (TPP) 5g, stir rapidly for about 1min to form a mixed flame retardant system;

[0044] S2: Slowly add 15-25 g of the melamine resin prepolymer obtained in Preparation Example 1 dropwise to the mixed flame retardant system prepared in step S1, stir rapidly, adjust the pH of the system to 5.4, raise the temperature to 80° C., and keep it warm for 2 hours;

[0045] S3: Stop stirring, adjust the pH of the system to 7.0, slowly lower to room temperature, filter, wash with deionized water for 3 times, and dry in a 30°C drying oven for 4 hours to obtain a microencapsulated flame retardant;

[0046] S4: Put 10mL of hexamethyldisila...

Embodiment 1

[0051] The preparation of embodiment 1 EPS foam board

[0052] S1: Add 120mL of deionized water into a 5L high-temperature and high-pressure reactor, turn on the agitator, add 0.5g of active calcium phosphate and 0.5g of calcium carbonate as dispersants, add 0.3g of sodium dodecylbenzenesulfonate, and stir for 5 minutes After adjusting the pH of the system to 8.0, add 100 g of styrene monomer, stir to form milky white droplets, slowly add 6 g of the surface-modified microencapsulated flame retardant prepared in Preparation Example 2, and then add dibenzoyl peroxide and dibenzoyl peroxide. 0.5g of cumene respectively, heat up to 90°C, start timing, and react at a constant temperature of 90±0.5°C for 6 hours;

[0053] S2: Add 6 g of n-pentane to the reaction system, raise the temperature to 120°C, and control the reaction at a constant temperature of 120±0.5°C for 3 hours;

[0054] S3: Cool to room temperature, discharge, filter, wash with deionized water three times, and dry a...

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Abstract

The invention discloses a flame-retardant EPS foam material. The foam material is prepared from the following raw materials, every 100 parts of styrene monomers need to be used in cooperation with 1-20 parts of a surface-modified microencapsulated flame retardant, 0.1-2 parts of an initiator, 2-10 parts of a foaming agent, 100-200 parts of deionized water and 0.2-1.5 parts of water-based auxiliarymaterials that comprise 0.1-1 part of a dispersing agent and 0.1-0.5 part of an emulsifying agent. The surface-modified microencapsulated flame retardant is prepared by the following steps: microencapsulating a metal hydroxide flame retardant, an organic silicon flame retardant and an organic phosphorus flame retardant. In the method, hexamethyldisilazane is used for surface modification, siliconand nitrogen atoms are introduced into the system to increase the flame retardance, and the compatibility between the flame retardant and the polymer can be improved, so that the polymer is dispersedmore uniformly.

Description

technical field [0001] The invention belongs to the technical field of polymer flame-retardant materials, and in particular relates to a flame-retardant EPS foam material and its preparation method and application. Background technique [0002] Polystyrene (Polystyrene, abbreviated as PS) is a thermoplastic, which is odorless, colorless, non-toxic and transparent particles, with excellent mechanical properties, heat insulation properties, electrical insulation, dimensional stability, processing fluidity and With the advantages of chemical corrosion resistance, it is widely used in various industries such as construction, instrumentation, home appliances, pharmaceuticals, electronics, automobiles, furniture, daily necessities and packaging. Polystyrene includes general-purpose polystyrene, high-impact polystyrene, and expandable polystyrene (EPS). [0003] Although polystyrene has many excellent properties and is widely used in production and life, polystyrene is easy to bur...

Claims

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Application Information

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IPC IPC(8): C08L25/06C08L83/14C08J9/22C08J9/20C08J9/14C08F112/08C08K9/10C08K9/06C08K3/22C08K5/521C08K5/523
CPCC08F112/08C08J9/0061C08J9/009C08J9/141C08J9/20C08J9/228C08J2325/06C08J2483/14C08K3/22C08K5/521C08K5/523C08K9/06C08K9/10C08K2003/2224C08K2003/2227
Inventor 李向梅杨荣杰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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