Novel composite vesicant

A technology of compound foaming agent and organic foaming agent, applied in the field of foaming agent, can solve the problems of difficult to improve production efficiency, reduce foaming efficiency, difficult to mix uniformly, etc., achieve low cost, improve product quality, and improve component composition. less effect

Inactive Publication Date: 2008-10-01
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing foaming agent is directly mixed with plastic raw materials, or foaming agent, foaming aids are mixed with it for foaming, and zinc oxide is mixed with foaming agent, the purpose is to facilitate the foaming agent in plastic raw

Method used

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  • Novel composite vesicant
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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] Example 1: The porous silica carrier was added to the silane coupling agent dissolved in the ethanol solution, stirred at room temperature for 12 hours, and modified; the surfactant was added to the azodicarbonamide solution for refinement and modification. The modified carrier is impregnated with the modified foaming agent azodicarbonamide for 12 hours, and finally the composite foaming agent is dried at 60°C for 24 hours to obtain the finished composite foaming agent. The specific formula is shown in Table 1.

[0015] Table 1, azodicarbonamide / silica composite foaming agent formulation

[0016] recipe

Example Embodiment

[0017] Embodiment 2: the preparation method of 4,4'-oxidized diphenylsulfonyl hydrazine / silicon dioxide composite foaming agent described in embodiment 2 is the same as embodiment 1. The specific formula is shown in Table 2.

[0018] Table 2, 4,4'-diphenylsulfonyl hydrazine oxide / silica composite foaming agent formulation

[0019] recipe

Example Embodiment

[0020] Embodiment 3: The montmorillonite carrier is added to the silane coupling agent dissolved in the ethanol solution, stirred at room temperature for 12 hours, and modified, and then the pH of the mixed system is adjusted to PH=9 with sodium hydroxide solution; The active agent was added to the azodicarbonamide solution for refinement and modification; at 60 °C, the modified carrier was vigorously stirred with the modified foaming agent azodicarbonamide for 24 hours, and finally the composite was released. The foaming agent was dried at 60°C for 24 hours to obtain the finished product of the composite foaming agent. The specific formula is shown in Table 3.

[0021] Table 3, formula of azodicarbonamide / montmorillonite composite foaming agent

[0022] recipe

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Abstract

The invention relates to the improvement on a foaming agent used for the foaming of plastic products and a novel compound foaming agent which is compounded by one or more than one organic foaming agent and /or inorganic foaming agent, as well as at least one or more than one carrier and a coupling agent. The invention provides a novel compound foaming agent with simple matching, few components, low cost and good safety. The foaming agent is not easy to gather together, has relatively narrow primary particle distribution, can perform better in blending with plastic raw materials and has better foaming efficiency, moreover bubbles foamed are more even and achieve a micro bubble grade level.

Description

technical field [0001] The invention relates to the field of foaming agents, mainly a novel composite foaming agent. Background technique [0002] One of the industrial uses of blowing agents is in the foaming of PVC, rubber, polyolefins such as polyethylene or polypropylene, or other polymers. Azodicarbonamide is one of the most important blowing agents. The existing foaming agent is directly mixed with the plastic raw material, or the foaming agent and the foaming aid are mixed with it for foaming, and zinc oxide is mixed with the foaming agent, the purpose is to facilitate the foaming agent in the plastic raw material. However, the mixture of the foaming agent and the plastic raw material is not easy to mix evenly, and the production efficiency is not easy to improve, and it is easy to cause early foaming, thereby reducing the foaming efficiency. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a new type of composite foaming agent ...

Claims

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Application Information

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IPC IPC(8): C08K9/02C08J9/00C08K5/23C08K5/54C08K3/36C08K5/25C08K5/43
Inventor 郭灿雄刘晶孙培琴吴大鸣
Owner BEIJING UNIV OF CHEM TECH
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