Additive composite used for preparing expandable polystyrene, and preparation method and application thereof

A technology of expandable polystyrene and composition, which is applied in the field of preparing expandable polystyrene particles, can solve problems such as environmental impact, and achieve the effects of easy transportation, good balance of flame retardancy and mechanical properties, and high strength

Active Publication Date: 2012-09-19
上海容为实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, the current expansion process of expandable polystyrene will release 6-8% of volatile organic compounds (VOC) per ton. Only China will release at least 70,000 tons of blowing agent into the atmosphere every year, which is extremely harmful to the environment. big impact

Method used

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  • Additive composite used for preparing expandable polystyrene, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~7

[0053] Embodiment 1~7 prepares predispersion particle

[0054] Step 1, mix and disperse the raw materials evenly with a dry mixer according to the ratio in Table 1;

[0055] Step 2: Melting uniformly dispersed raw materials at 80 to 130° C. through a screw extruder, extruding, cooling, and cutting into pellets to prepare pre-dispersed particles.

[0056] Table 1: The parts by weight of the following raw materials corresponding to the amount of styrene monomer taken in 1000 parts by weight

[0057]

[0058] The pre-dispersed particles obtained in the above-mentioned embodiments 1 to 7 are used to prepare expandable polystyrene particles:

[0059] In a 1000L reactor, add 400kg of deionized water while starting to stir and heat up, then add 20g of sodium dodecylbenzenesulfonate, 2.5kg of sodium disulfide, 1.25kg of calcium phosphate (TCP), and benzoyl peroxide Acyl (BPO) 1kg, tert-butyl peroxybenzoate (TBPB) 0.5kg, dicumyl peroxide (DCP) 1kg, styrene 250kg, add hexabromocycl...

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Abstract

The invention discloses an additive composite used for preparing expandable polystyrene, and a preparation method and an application thereof. The additive comprises the following raw materials in parts by weight: 0.5-2 parts of pore regulator, 0.1-1 part of plasticizer, 2-8 parts of heat insulation agent, and 1-4 parts of synergistic flame retardant, wherein the pore regulator is polyolefin wax of which the dropping point is 95-135 DEG C, the needle penetration is less than 1mm at 25 DEG C, and the kinematic viscosity is less than 2000mm<2>/s at 149 DEG C; the plasticizer is olefin polymer without a polar functional group, and the kinematic viscosity of the olefin polymer is less than 20mm<2>/s at 100 DEG C; the heat insulation agent is graphite; and the synergistic flame retardant is antimony oxide or zinc borate. According to the preparation method of the additive provided by the invention, extruding granulation can be completed without the need for carriers and dispersing agents. The additive provided by the invention is convenient to convey, store and charge, and when the expandable polystyrene prepared by adding the additive is used for manufacturing a foaming product, the foaming efficiency is high, the cycle is short, environment is protected, and the characteristics of heat insulation and flame retardance are good.

Description

technical field [0001] The present invention relates to a flame-retardant and heat-insulating additive composition, in particular to an additive composition for preparing expandable polystyrene, its preparation method and its use for preparing expandable polystyrene particles , the expandable polystyrene particles are key raw materials for preparing heat-insulating and flame-retardant foam products. Background technique [0002] Due to the special performance of thermal insulation, sheets, plates and profiles made of expandable polystyrene are widely used in buildings, vehicles, furniture and other items. But these products are closely related to people's lives, so most of the expandable polystyrene needs to be flame retardant. At present, China's building exterior insulation consumes more than one million tons of expandable polystyrene plastics per year, and this demand will reach two million tons per year in the next few years; improving the energy-saving efficiency of re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08L23/00C08K13/02C08K3/04C08K3/22C08K3/38C08F112/08C08F2/44C08J9/20
Inventor 靳茂全林玉芳
Owner 上海容为实业有限公司
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