Environment-friendly flame-retardant expandable polystyrene resin and preparation method thereof

An expandable polystyrene, flame retardant technology, applied in the field of polystyrene resin, can solve the problems of reducing production efficiency, increasing costs, increasing the dosage of flame retardants, etc. The effect of the application foreground

Pending Publication Date: 2021-06-01
无锡兴达泡塑新材料股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a macromolecular copolymer in the suspension polymerization of the reactor, there is a problem of compatibility with styrene, so that in order to achieve the same flame retardant effect as hexabromocyclododecane, it is only possible to increase the dosage of flame retardants. However, if the dosage of flame retardant is too large, it will affect the flame retardant effect to a certain extent, increase the cost and reduce the production efficiency at the same time.

Method used

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  • Environment-friendly flame-retardant expandable polystyrene resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Pour 115 parts of desalinated water into the reactor, add 2.6 parts of calcium phosphate and 0.0003 parts of sodium sulfonate successively under uniform stirring, and continue stirring for 8 minutes. Add 50 parts of styrene and 0.2 parts of benzoyl peroxide in sequence, and heat the reactor at a heating rate of 0.9°C / min. When the temperature rises to 89°C, keep the constant temperature for 125 minutes.

[0021] Add the remaining 50 parts of styrene, the remaining 0.2 parts of benzoyl peroxide, 0.5 parts of dicumyl peroxide, 0.8 parts of brominated styrene-butadiene-styrene block copolymer and 0.2 parts of structure regulator, wherein The regulator is linear polyethylene or branched polyethylene, and continue to heat the reactor. When the temperature rose to 88°C, the temperature was maintained for 330 minutes to make the material form granules.

[0022] Add 4.5 parts of pentane, and continue to heat the reactor until the temperature reaches 120° C., and the pressure i...

Embodiment 2

[0026] Pour 130 parts of desalted water into the reactor, add 4.0 parts of calcium phosphate and 0.0005 parts of sodium sulfonate successively under uniform stirring, and continue stirring for 10 minutes. Afterwards, 55 parts of styrene and 0.25 parts of benzoyl peroxide were successively added, and the reactor was heated at a heating rate of 1.2° C. / min. When the temperature rose to 93° C., the temperature was maintained for 150 minutes.

[0027] Add the remaining 55 parts of styrene, the remaining 0.25 parts of benzoyl peroxide, 0.6 parts of dicumyl peroxide, 0.9 parts of brominated styrene-butadiene-styrene block copolymer and 0.3 parts of structure regulator , wherein the regulator is linear polyethylene or branched polyethylene, and continue to heat the reactor. When the temperature rises to 90°C, keep the constant temperature for 300 minutes to make the material form granules.

[0028] Add 4.0 parts of pentane, and continue to heat the reactor until the temperature reac...

Embodiment 3

[0032] Pour 100 parts of desalted water into the reactor, add 1.2 parts of calcium phosphate and 0.0002 parts of sodium sulfonate successively under uniform stirring, and continue stirring for 5 minutes. Afterwards, 45 parts of styrene and 0.15 parts of benzoyl peroxide were added in sequence, and the reactor was heated at a heating rate of 0.6° C. / min. When the temperature rose to 85° C., the temperature was maintained for 100 minutes.

[0033] Add the remaining 45 parts of styrene, the remaining 0.15 parts of benzoyl peroxide, 0.3 parts of dicumyl peroxide, 0.75 parts of brominated styrene-butadiene-styrene block copolymer and 0.1 part of structure regulator , wherein the regulator is linear polyethylene or branched polyethylene, and continue to heat the reactor. When the temperature rises to 85°C, keep the constant temperature for 360 minutes to make the material form granules.

[0034] Add 5.0 parts of pentane, and continue to heat the reactor until the temperature reache...

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Abstract

The invention relates to environment-friendly flame-retardant expandable polystyrene resin and a preparation method thereof. The environment-friendly flame-retardant expandable polystyrene resin is prepared from styrene, desalted water, sodium sulfonate, calcium phosphate, benzoyl peroxide, dicumyl peroxide, a brominated styrene-butadiene-styrene block copolymer, pentane and a structure regulator. The preparation method comprises the following steps: feeding, polymerizing, gas filling, impregnating at high temperature, cooling, dehydrating and the like. The segmented polymerization technology adopted by the new process can effectively solve the problem of compatibility of the brominated styrene-butadiene-styrene segmented copolymer and styrene, and effectively improves the flame retardant efficiency. The environment-friendly flame-retardant expandable polystyrene resin prepared by the invention has ecological environmental protection and biological safety, can meet export requirements of Europe and America and the like, has flame retardance capable of meeting requirements in the field of thermal insulation of building external walls, and has a wide application prospect.

Description

technical field [0001] The invention relates to the field of polystyrene resins, in particular to an environment-friendly flame-retardant expandable polystyrene resin and a preparation method thereof. Background technique [0002] At present, although the flame retardants used in the market have the advantages of high cost performance, they cannot be exported because they cannot meet the "Stockholm Convention". Alternative flame retardants mainly include methyl octabromoether and brominated styrene-butadiene-styrene block copolymer. Although methyl octabromoether is not listed as a prohibited substance, in the long run, brominated benzene Ethylene-butadiene-styrene block copolymers are more ecologically friendly and biologically safe, so brominated styrene-butadiene-styrene block copolymers are preferred as new flame retardants. However, as a macromolecular copolymer in the suspension polymerization of the reactor, there is a problem of compatibility with styrene, so that i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08L53/02C08L23/06C08K3/32C08K5/42C08J9/14C08J9/18
CPCC08J9/18C08J9/141C08J9/0061C08J9/0095C08J9/0066C08J9/0033C08J2325/06C08J2453/02C08J2423/06C08J2203/14C08K2003/325C08K5/42
Inventor 华啸威吴钧许铭周正红
Owner 无锡兴达泡塑新材料股份有限公司
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