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Catching agent for free formaldehyde in urea resin

A technology of free formaldehyde and urea-formaldehyde resin, which is applied in the direction of aldehyde/ketone condensation polymer adhesives, adhesives, adhesive types, etc., can solve the problems affecting the elimination effect of free formaldehyde, reduce the effective components of formaldehyde scavenger, etc., and achieve the reaction Fast, easy-to-use effects

Active Publication Date: 2015-03-25
佛山市奥朗科技有限公司
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  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is that it is necessary to add equipment to spray or paint the formaldehyde scavenger on the finished board. For the sake of appearance, the treated board will go through the last polishing process, which will reduce the active ingredients of the formaldehyde scavenger and affect the elimination of free formaldehyde in the board. Effect

Method used

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  • Catching agent for free formaldehyde in urea resin
  • Catching agent for free formaldehyde in urea resin
  • Catching agent for free formaldehyde in urea resin

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Embodiment Construction

[0023] A kind of free formaldehyde capture agent in urea-formaldehyde resin of the present invention, it is made up of following components (percentage by weight): amino compound such as urea 45%, cyanamide compound such as dicyandiamide 15%, carboxymethyl cellulose 14%, Amide compounds such as caprolactam 8%, nano-titanium dioxide 1%, glass powder 17%.

[0024] Wherein the chemical equation of amino compound and formaldehyde reaction is:

[0025] h 2 H-R + HCHO → R-HN-CH 2 -OH

[0026] The chemical equation for the reaction of cyanamide compounds with formaldehyde:

[0027]

[0028] TiO 2 Mechanism of photocatalytic action:

[0029] When photons with a wavelength less than 387.5nm irradiate TiO 2 After the surface, the electrons in the valence band will be excited to the conduction band, thereby generating highly active photogenerated holes (h+) and e-(4-7) in the valence band and conduction band respectively:

[0030] TiO 2 + hv→ h + +e - ...

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Abstract

The invention discloses a catching agent for free formaldehyde in urea resin. The catching agent is characterized by comprising the following components by weight percent: 1%-50% of amino compound, 0.5%-30% of cyanamide compound, 0.1%-30% of hydroxyl-containing water soluble polymer compound, 0.2%-10% of amide compound, 0.8%-1.5% of nano-titanium dioxide and 0.5%-20% of silicon oxide mineral, wherein the sum of the percentages of the components is 100%. By adding the catching agent provided by the invention into the urea resin, the formaldehyde which is generated when the urea resin is heated and cross-linked and the free formaldehyde in the urea resin are eliminated. The catching agent has high popularizing value.

Description

technical field [0001] The invention relates to the technical field of free formaldehyde scavenger, in particular to a solid capable of eliminating free formaldehyde in urea-formaldehyde resins. Background technique [0002] At present, formaldehyde, the main pollutant in indoor air, mainly comes from wood-based panels for making furniture and interior decoration. The adhesive required for the production of wood-based panels is urea-formaldehyde resin. Urea-formaldehyde resin glue has simple manufacturing process, cheap and easy-to-obtain raw materials, good wettability, high bonding strength and certain water resistance. It is currently the most widely used synthetic resin adhesive in the wood industry and is widely used by plywood manufacturers in China. However, the wood-based panels produced by using urea-formaldehyde resin glue will slowly release formaldehyde, which seriously pollutes the indoor environment and affects human health. Formaldehyde is harmful to human h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62D3/30C09J11/06C09J161/24A62D101/28
Inventor 李艳莉尹诗
Owner 佛山市奥朗科技有限公司
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