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Expandable polystyrene particles with high foaming ratio and preparation method thereof

An expandable polystyrene, high-foaming technology, applied in the field of foamed resin raw materials and its preparation, can solve the problems of high density of foamed plastics, damaged by packaging, and high production costs, and achieves strong toughness, easy expansion, and raw materials. less effect

Active Publication Date: 2012-07-18
无锡兴达泡塑新材料股份有限公司 +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The foamed plastic made by foaming the flame-retardant expandable polystyrene particles has a processing density of 18-28kg / m 3 , due to high density, high brittleness, poor toughness, easy to break
Therefore, the use of such foam-plastic products as packaging materials for electronic appliances is likely to cause damage to the packaged objects.
In addition, due to the high density of foamed plastics made of the above-mentioned flame-retardant expandable polystyrene particles, more raw materials are required, resulting in higher production costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] First select 90 parts of styrene, 100 parts of soft water, 0.1 parts of nucleating agent, 1.2 parts of calcium phosphate, 0.3 parts of benzoyl peroxide, 0.1 parts of tert-butyl peroxybenzoate, 0.3 parts of white Oil, 0.3 parts of chain force regulator, 7.0 parts of pentane and 0.15 parts of surface lubricant. Wherein, the said lubricant is mixed according to the weight ratio of zinc stearate: glyceryl stearate=40:60.

[0033] Then, add soft water into the reaction kettle, and while stirring evenly, add calcium phosphate, styrene, benzoyl peroxide, tert-butyl peroxybenzoate, nucleating agent, white oil, and molecular chain force modifier in sequence , and heat the materials in the reactor according to the heating rate of 0.8° C. / min. When the temperature rises to 85°C, keep the constant temperature for 400 minutes to make the material form particles with a particle size of 30-12 mesh.

[0034] Afterwards, pentane was added, and the reactor was continued to be heated, s...

Embodiment 2

[0039] First select 100 parts of styrene, 110 parts of soft water, 0.2 parts of nucleating agent, 1.4 parts of calcium phosphate, 0.4 parts of benzoyl peroxide, 0.2 parts of tert-butyl peroxybenzoate, 0.4 parts of white Oil, 0.4 parts of chain force regulator, 7.5 parts of pentane and 0.2 parts of surface lubricant. Wherein, the said lubricant is mixed according to the weight ratio of zinc stearate: glyceryl stearate=40:60.

[0040] Then, add soft water into the reaction kettle, and while stirring evenly, add calcium phosphate, styrene, benzoyl peroxide, tert-butyl peroxybenzoate, nucleating agent, white oil, and molecular chain force modifier in sequence , and the reactor was heated at a heating rate of 0.6° C. / min. When the temperature rises to 88°C, keep the constant temperature for 350 minutes to make the material form particles with a particle size of 30-12 mesh.

[0041] Afterwards, pentane was added, and the reactor was continued to be heated, so that the temperature ...

Embodiment 3

[0046] Select 110 parts of styrene, 120 parts of soft water, 0.3 parts of nucleating agent, 1.6 parts of calcium phosphate, 0.5 parts of benzoyl peroxide, 0.3 parts of tert-butyl peroxybenzoate, 0.6 parts of white oil , 0.5 parts of molecular chain force modifier, 8.0 parts of pentane and 0.3 parts of surface lubricant. Wherein, the said lubricant is mixed according to the weight ratio of zinc stearate: glyceryl stearate=40:60.

[0047] Then, add soft water into the reaction kettle, and while stirring evenly, add calcium phosphate, styrene, benzoyl peroxide, tert-butyl peroxybenzoate, nucleating agent, white oil, and molecular chain force modifier in sequence , and the reactor was heated at a heating rate of 0.5° C. / min. When the temperature rises to 90°C, keep the constant temperature for 300 minutes to make the material form particles with a particle size of 30-12 mesh.

[0048] Afterwards, pentane was added, and the reactor was continued to be heated, so that the temperat...

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Abstract

The invention relates to expandable polystyrene particles with high foaming ratio and a preparation method thereof, and particularly relates to raw materials for producing cushion packaging materials for electronics, building insulation materials and ocean floating products and a preparation method thereof. The expandable polystyrene particles with high foaming ratio are characterized by being prepared from styrene, soft water, nucleating agent, calcium phosphate, benzoyl peroxide, tert-butyl perbenzoate, white oil, a molecular chain acting force regulating agent, pentane, a surface lubricant and the like as raw materials by the steps of mixing, reacting, filtering and drying. The foam plastic prepared from the expandable polystyrene particles has low production cost; and used as a packaging material, the foam plastic is hard to break and can prevent the packed material from being damaged.

Description

technical field [0001] The invention relates to a foaming resin raw material and a preparation method thereof. Specifically, it is the raw material and preparation method used to produce cushioning packaging materials for electronic appliances, building insulation materials, and marine floating products. Background technique [0002] At present, it is known in the electronic and electrical packaging industry and the construction field that foamed plastics have been widely used as packaging materials for electronic and electrical products and external insulation materials for buildings. [0003] Chinese Patent No. 021385947 discloses a flame-retardant expandable polystyrene particle, which is made of styrene, calcium phosphate, buffer, sodium pyrophosphate, glyceryl monostearate, benzene peroxide Formyl, dicumyl peroxide, bromine and pentane. The foam plastic made by foaming the flame-retardant expandable polystyrene particles has a processing density of 18-28kg / m 3 , due ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08L23/00C08K13/02C08K3/32C08K5/098C08K5/103C08F112/08C08F2/44C08F2/38C08J9/20
Inventor 华啸威许铭杨琪吴均项讯
Owner 无锡兴达泡塑新材料股份有限公司
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