Expandable polystyrene particle coating agent and preparation method and application thereof

A technology of expandable polystyrene and coating agent, which is applied in the direction of coating, etc., can solve the problems of poor fluidity, reduced foaming ratio, and less adsorption, so as to achieve good fluidity, improve molding efficiency, and reduce hair loss. Effect of Foaming Agent and Auxiliary Loss

Active Publication Date: 2014-01-08
王志刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to prevent the EPS particles from sticking to each other and agglomerating during foaming, and to prevent gaps in the mold filled with foam particles caused by uneven foaming, resulting in cavities on the molded product, it is necessary to add a coating agent on the surface of the particles. The traditional method Coating agent monoglyceride, glyceryl tristearate, zinc stearate, but this coating agent is powder, in the storage, transportation and processing engineering of EPS particles, the loss of foaming agent and additives is very important Inevitably, if the loss is too much, the foaming ratio will decrease, the density will increase, and molding will be difficult
In addition, the coating agent has a small amount of adsorption on the surface of EPS particles, which leads to defects such as adhesion between particles, poor fluidity, and mutual adhesion and agglomeration between particles in the subsequent foaming process.

Method used

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  • Expandable polystyrene particle coating agent and preparation method and application thereof
  • Expandable polystyrene particle coating agent and preparation method and application thereof
  • Expandable polystyrene particle coating agent and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Grind 35g of monoglyceride, 30g of glyceryl tristearate, 25g of zinc stearate, and 6g of stearic acid amide. The fineness requires a 200-mesh standard sieve with a passing capacity of ≥95%. Take the sieved material of the four raw materials , and then mixed and stirred to obtain coating agent T1;

[0032] When coating EPS raw particles, first add 20kg of EPS raw particles into the mixer, then add 40g of coating agent T1 and mix for 30 minutes.

Embodiment 2

[0034] Grind 30g of monoglyceride, 35g of glyceryl tristearate, 30g of zinc stearate, and 10g of stearic acid amide. The fineness requires a 200-mesh standard sieve with a passing capacity of ≥95%. Take the sieved material of the four raw materials , and then mixed and stirred to obtain coating agent T2;

[0035] When coating EPS raw particles, first add 20kg of EPS raw particles into the mixer, then add 50g of coating agent T2 and mix for 30 minutes.

Embodiment 3

[0037] Grind 40g of monoglyceride, 30g of glyceryl tristearate, 20g of zinc stearate, and 10g of stearic acid amide. The fineness requires a 200-mesh standard sieve with a passing capacity of ≥95%. Take the sieved material of the four raw materials , and then mixed and stirred to obtain coating agent T3;

[0038] When coating EPS raw particles, first add 20kg of EPS raw particles into the mixer, then add 60g of coating agent T3 and mix for 30 minutes.

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Abstract

The invention discloses an expandable polystyrene particle coating agent and a preparation method and application thereof. The expandable polystyrene particle (EPS) coating agent comprises monoglyceride, tristearin, zinc stearate and octadecanamide. By the coating agent prepared by the method, EPS particles can be coated without notches, foaming agent and assistant loss in the particles are reduced, no static exists among particles, adhesion and agglomeration are avoided, adhesion of the EPS particles during foaming is avoided, and forming efficiency is increased.

Description

technical field [0001] The invention relates to a coating agent for expandable polystyrene particles and its preparation method and application. Background technique [0002] In expandable polystyrene resin, the English abbreviation (EPS), is mainly divided into three types: ordinary type, high-power type and flame retardant. Foamed plastic products can be made by pre-hairing, curing and molding. It has the advantages of light weight, low cost, low thermal conductivity, low water absorption, good electrical insulation, sound insulation, moisture resistance, and simple molding process. It is widely used in packaging, heat preservation, heat insulation, and architectural decoration. [0003] There are two basic ways to produce expandable polystyrene resin: "one-step method" and "two-step method". [0004] The one-step method is to add polystyrene monomer, initiator, dispersant, water, foaming agent and other additives into the reactor for polymerization to obtain resin parti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/224C08J7/06C08J7/04C08L25/06
Inventor 王志刚
Owner 王志刚
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