A low-temperature environment-friendly foaming agent

Abstract

The invention provides a low temperature environment-friendly foaming agent. The foaming agent comprises 40-80 parts of AC foaming agent, 10-40 parts of active additive, 1-10 parts of decomposing control agent, and 5-20 parts of formamide removing agent, wherein the active additive is a single active additive A or a mixture of active additive A, active additive B and active additive C, the active additive A is zinc compounds like zinc oxide, zinc stearate and the like, the active additive B is urea or thiourea for surface treatment, the active additive C is one of triethanolamine, pentaerythritol and glycerinum or mixture of a plurality of triethanolamine, pentaerythritol and glycerinum. The low temperature environment-friendly foaming agent has low decomposing temperature; furthermore, the decomposed product is completely free of formaldehyde and basically contains no formamide.

Description

technical field [0001] The invention belongs to the field of chemical foaming agents, in particular to a low-temperature environment-friendly foaming agent. Background technique [0002] AC foaming agent is a foaming agent with large gas generation, superior performance and wide application. The chemical name of AC foaming agent is azodicarbonamide, which is widely used in various synthetic materials, and its applications are found in slippers, shoe soles, insoles, plastic wallpapers, ceilings, floor leather, artificial leather, heat insulation, sound insulation materials and other industries. Moreover, because AC foaming agent has the characteristics of stable performance, non-flammable, non-polluting, non-toxic and tasteless, no corrosion to molds, no staining of products, adjustable decomposition temperature, and no influence on curing and molding speed, it has broad application prospects . [0003] Although AC blowing agents are widely used, the existing AC blowing age...

AI Technical Summary

Problems solved by technology

[0003] Although AC blowing agents are widely used, the existing AC blowing agents (azodicarbonamide) have the following disadvantages: (1) The decomposition temperature of AC blowing agents is 200-208°C, even in AC blowing agents Add zinc oxide, zinc carbonate and other activators to form a composite foaming agent. The decomposition temperature of the composite foaming agent is also above 155°C, which is high; (2) Because the decomposition reaction of AC foaming agent is a violent exotherm reaction, and the decomposition reaction of the AC foaming agent caused by the zinc compound is too fast, which makes the decomposition heat generation too concentrated and the decomposition process uncontrollable, which easily leads to the occurrence of secondary reactions and produces some toxic and harmful products, such as AC blowing agent When the foaming agent decomposes at a temperature higher than 160°C, it will produce toxic substance-formamide, which will seriously affect the health of users

Although the decomposition temperature of this AC composite modified low-temperature foaming agent is 125-135°C, since the product contains H foaming agent, another toxic substance-formaldehyde will be produced when the H foaming agent decomposes, therefore, H foaming agent is also included in the list of banned chemicals by European and American countries

For the above shortcomings (2), solutions are being studied both at home and abroad, but no breakthroughs have been made yet.

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