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Modified polystyrene foam material and recycling method thereof

A technology of polystyrene foaming and styrene, which is applied in the field of plastic materials, can solve the problems of fragility, poor bonding performance, and low tensile strength, so as to increase the number of cycles, good recycling, and improve hydrophobicity and alkali resistance

Pending Publication Date: 2022-07-15
苏州梅克兰循环科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Expanded polystyrene has the disadvantages of high hardness, brittleness, low tensile strength, and poor bonding performance between products.

Method used

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  • Modified polystyrene foam material and recycling method thereof
  • Modified polystyrene foam material and recycling method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A preparation method of modified polystyrene foam material, in parts by weight, comprising the following steps:

[0048] Step 1: Dissolve 15 parts of styrene in 50 parts of ethanol to obtain a styrene solution;

[0049] Step 2: prepare 15 parts of ethylenediamine aqueous solution containing 0.25wt% sodium glycocholate, add styrene solution, and mix evenly, wherein the concentration of the ethylenediamine aqueous solution is 2.5mol / L;

[0050] Step 3: Siloxane phosphate was added dropwise at a temperature of 45°C and a stirring speed of 50rpm until a microemulsion was formed, then 2 parts of ethyl orthosilicate were added dropwise, and stirring was continued for 18h;

[0051] Step 4: distillation under reduced pressure to remove water and ethanol;

[0052] Step 5: add 0.15 part of benzoyl peroxide, heat to 60°C and stir for 1 h;

[0053] Step 6: add 70 parts of water, 5 parts of polyvinyl alcohol, and 0.05 part of mono-substituted β-cyclodextrin derivative, adjust the ...

Embodiment 2

[0078] A preparation method of a modified polystyrene foam material, in parts by weight, comprising the following steps:

[0079] Step 1: Dissolve 15 parts of styrene in 60 parts of ethanol to obtain a styrene solution;

[0080] Step 2: prepare 18 parts of ethylenediamine aqueous solution containing 0.25wt% sodium glycocholate, add styrene solution, and mix evenly, wherein the concentration of the ethylenediamine aqueous solution is 2.5mol / L;

[0081] Step 3: Add siloxane phosphate dropwise at a temperature of 48°C and a stirring speed of 60rpm until a microemulsion is formed, then dropwise add 3 parts of ethyl orthosilicate, and continue stirring for 18h;

[0082] Step 4: distillation under reduced pressure to remove water and ethanol;

[0083] Step 5: Add 0.16 part of benzoyl peroxide, heat to 65°C and stir for 1.5h;

[0084] Step 6: add 80 parts of water, 6 parts of polyvinyl alcohol, and 0.06 part of mono-substituted β-cyclodextrin derivative, adjust the stirring speed t...

Embodiment 3

[0109] A preparation method of a modified polystyrene foam material, in parts by weight, comprising the following steps:

[0110] Step 1: Dissolve 15 parts of styrene in 60 parts of ethanol to obtain a styrene solution;

[0111] Step 2: prepare 18 parts of ethylenediamine aqueous solution containing 0.25wt% sodium glycocholate, add styrene solution, and mix evenly, wherein the concentration of the ethylenediamine aqueous solution is 2.5mol / L;

[0112] Step 3: Add siloxane phosphate dropwise at a temperature of 48°C and a stirring speed of 70rpm until a microemulsion is formed, then dropwise add 3 parts of ethyl orthosilicate, and continue stirring for 18h;

[0113] Step 4: distillation under reduced pressure to remove water and ethanol;

[0114] Step 5: Add 0.16 part of benzoyl peroxide, heat to 65°C and stir for 1.5h;

[0115] Step 6: add 85 parts of water, 6 parts of polyvinyl alcohol, and 0.06 parts of mono-substituted β-cyclodextrin derivatives, adjust the stirring speed...

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Abstract

The invention provides a preparation method of a modified polystyrene foam material. The preparation method comprises the following steps: obtaining a styrene solution; preparing an ethylenediamine aqueous solution of sodium glycocholate, adding a styrene solution, and uniformly mixing; dropwise adding siloxane phosphate until a microemulsion is formed, dropwise adding tetraethoxysilane, and stirring; performing reduced pressure distillation to remove water and ethanol; adding benzoyl peroxide, heating and stirring; adding water, polyvinyl alcohol and a monosubstituted beta-cyclodextrin derivative, and stirring for reaction; washing and drying to obtain polystyrene composite material resin particles; performing supercritical carbon dioxide kettle type foaming; immersing into a polycarboxyl / methyl silsesquioxane nanosphere emulsion, and drying; and immersing into a cross-linked amino silicon emulsion, and drying to obtain the product. Nano SiO2 attached to the surface of styrene is used as a filler, and modified polystyrene is generated through polymerization, so that the mechanical strength of the modified polystyrene is improved; and the hydrophobicity and alkali resistance are improved by adopting the polycarboxyl / methyl silsesquioxane nanosphere emulsion, so that the cycle use frequency is increased.

Description

technical field [0001] The invention relates to the field of plastic materials, in particular to a preparation method of a modified polystyrene foam material. Background technique [0002] Polystyrene is a polymer synthesized by free radical addition polymerization of styrene monomer. The glass transition temperature (Tg) of polystyrene is 80~105℃, and the density is 1.11~1.12g / cm 3 , the processing temperature is about 180 ℃. Polystyrene resins include ordinary polystyrene, high-impact polystyrene, expanded polystyrene, and the like. Among them, expanded polystyrene is to infiltrate ordinary polystyrene beads into a low-boiling physical foaming agent, and then heat and foam to prepare foamed plastic products. [0003] Expanded polystyrene has excellent thermal insulation performance, excellent shock-proof buffering, good aging resistance and water resistance, and is widely used in construction, packaging, electrical and electronic products, agriculture, transportation, mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/42C08J9/40C08J9/12C08L25/06C08L83/06C08L29/04C08K3/36C08J11/06C08B37/16
CPCC08J9/42C08J9/40C08J9/122C08J9/0071C08J9/0061C08J11/06C08B37/0012C08J2203/06C08J2203/08C08J2325/06C08J2483/06C08J2429/04
Inventor 周海明
Owner 苏州梅克兰循环科技有限公司
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