Composite foaming agent for urea-formaldehyde resin, preparing method and application thereof

A technology of composite foaming agent and urea-formaldehyde resin, which is applied in the direction of aldehyde/ketone condensation polymer adhesive, adhesive type, adhesive additive, etc. problems such as input, to achieve moderate surface tension, good uniformity and penetration balance, and improve the effect of fluidity

Inactive Publication Date: 2009-11-25
EVERFIRST WISEFUND TECH BEIJING
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AI-Extracted Technical Summary

Problems solved by technology

The existing adhesive foaming technology is generally suitable for low-viscosity, urea-formaldehyde resin without adding flour, and needs to increase special foaming equipment (rotating speed needs to be greater than 2000r/min) (for example, the invention patent with publication number CN1907552...
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Method used

As can be seen from Table 3, the urea-formaldehyde resin adhesive after the composite blowing agent of the present invention has been added, compared to contrast product, ...
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Abstract

The present invention discloses a composite foaming agent for urea-formaldehyde resin, a preparing method and an application thereof. The composite foaming agent of the invention is composed of a foaming agent, a foam stabilizer and a dispersing agent. After the composite foaming agent is added into the urea-formaldehyde resin additive, the volume of the urea-formaldehyde resin can be increased for 2-3 times for forming the fine, uniform and long-lasting foamed urea-formaldehyde resin, effectively regulating the surface tension of the glue solution, reducing the conglobation phenomenon of flour, increasing the fluidity of the urea-formaldehyde resin, settling the adverse phenomena of glue bleeding, glue leakage, non-homogeneous adhesive layer, etc. which commonly exist in the prior urea-formaldehyde resin adhesive, so that the urea-formaldehyde resin on the plate blank of the veneer board has excellent homogeneity and the bleeding balancing is kept and the total usage of flour and the urea-formaldehyde resin after adhesive mixing is reduced for 10-30%. Additionally, the composite foaming agent of the invention has the advantages of excellent safety, no adverse effect in the using process and capability for effectively reducing the release amount of the formaldehyde of the artificial board. Furthermore the mechanical properties of the prepared artificial board can equally obtain the requirement of the national standard.

Application Domain

Technology Topic

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  • Composite foaming agent for urea-formaldehyde resin, preparing method and application thereof
  • Composite foaming agent for urea-formaldehyde resin, preparing method and application thereof
  • Composite foaming agent for urea-formaldehyde resin, preparing method and application thereof

Examples

  • Experimental program(4)
  • Effect test(2)

Example Embodiment

[0030] Example 1 Preparation of composite blowing agent
[0031] 1. Weigh each component according to the following weight:
[0032] 500g foaming agent, 100g guar gum, 100g sodium dodecylbenzene sulfonate;
[0033] The foaming agent is obtained by mixing the following components by weight: 2 parts of dehydrated alum, 7 parts of sodium bicarbonate, 4 parts of calcium carbonate, 7 parts of ammonium sulfate;
[0034] 2. The above components are crushed to a particle size of 100-200 microns by mechanical crushing, and then mixed evenly to obtain.

Example Embodiment

[0035] Example 2 Preparation of composite blowing agent
[0036] 1. Weigh each component according to the following weight:
[0037] 450g foaming agent, 90g bone glue, 90g sodium dodecylbenzene sulfonate;
[0038] The foaming agent is obtained by mixing the following components by weight: 2 parts of dehydrated alum, 6 parts of sodium bicarbonate, 3 parts of calcium carbonate, and 5 parts of ammonium sulfate;
[0039] 2. The above-mentioned components are pulverized to a particle size of 100-200 microns by means of air jet pulverization, and then mixed evenly to obtain.

Example Embodiment

[0040] Example 3 Preparation of composite blowing agent
[0041] 1. Weigh each component according to the following weight:
[0042] 550g foaming agent, 110g polyacrylamide, 110g sodium lauryl sulfate;
[0043] The foaming agent is obtained by mixing the following components by weight: 3 parts of dehydrated alum, 9 parts of sodium bicarbonate, 5 parts of calcium carbonate, and 8 parts of ammonium sulfate;
[0044] 2. The above-mentioned components are pulverized by mechanical pulverization and then mixed uniformly to obtain.
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PUM

PropertyMeasurementUnit
Particle size100.0 ~ 200.0µm
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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