Low formaldehyde resin adhesive for decorative impregnating paper and preparation method thereof

A technology of formaldehyde resin and production method, which is applied in adhesives, aldehyde/ketone condensation polymer adhesives, adhesive types, etc., can solve the problems of easy cracking of the adhesive layer, negative effects, and resistance to strong alkali erosion, etc., and achieve The effect of reducing the release of free formaldehyde, adding less, and wide applicability

Active Publication Date: 2013-04-17
GUANGDONG T&H NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The initial impregnation resin adhesive is a thermosetting phenolic resin adhesive, but the phenolic resin adhesive has certain toxicity, the color of the adhesive layer is dark, it is not resistant to strong alkali erosion, and the surface decoration of the veneer wood-based panel is poor, so its scope of use is restricted. certain restrictions
The melamine resin adhesive is light in color and will not cause the problem of deep color of the impregnated paper, and its bonding strength and wear resistance are also higher than those of the phenolic resin adhesive, but there are some disadvantages: ① After the glue is cured, the glue layer is easy to crack, affecting The quality of the surface of the decorative board is generally not used alone; ② melamine is relatively active, so the stability of the resin adhesive is poor, making it difficult to use; ③ The cost of melamine resin adhesive is relatively high and the price is relatively expensive
The urea-formaldehyde resin adhesive has become the most used adhesive in the wood-based panel industry due to its low cost, but has the disadvantages of high free formaldehyde content, poor water resistance and poor stability. / U) molar ratio to reduce the free formaldehyde content of the resin adhesive, the F / U molar ratio is an important parameter affecting many performance indicators of the formaldehyde resin adhesive, the lower the molar ratio, the lower the free formaldehyde content of the product, but this The method has a certain limit, and the molar ratio is too low, which will cause other negative effects, making its wettability, viscosity, water resistance, shelf life and other indicators unable to meet the use requirements

Method used

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  • Low formaldehyde resin adhesive for decorative impregnating paper and preparation method thereof

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specific Embodiment 1

[0029] Below, in conjunction with specific embodiment, the present invention is described further:

[0030] The low-formaldehyde resin adhesive for decorative adhesive film paper described in the present embodiment comprises following raw materials: concentration is 3000Kg of formaldehyde 3000Kg of 37%, urea 2000 Kg of concentration 98%, 75 Kg of compound auxiliary agent; Compound auxiliary agent is made of 15 Kg curing agent , 40 Kg cross-linking agent and 20 Kg strengthening agent. The molar ratio of formaldehyde to urea, F / U=1.13.

[0031] The curing agent is hexamethylenetetramine. Its function: improve the curing speed and adequacy of the resin, more effectively shield the release of formaldehyde, and prolong the service life of low-aldehyde environmentally friendly glue.

[0032] The crosslinking agent is methacrylic acid. Its function: it can improve the cross-linked structure of the resin during the reaction process.

[0033] The reinforcing agent is white carbon b...

specific Embodiment 2

[0045] The difference between the low-formaldehyde resin adhesive for decorative adhesive film paper described in this embodiment and specific embodiment 1 is: the addition amount of composite auxiliary agent is 50 Kg; and 15 Kg enhancer composition. Others are the same as in Example 1.

[0046] The difference between the production method of the low-formaldehyde resin adhesive for decorative film paper described in this example and the specific example 1 is that in step 2), the addition amount of the first batch of compounding additives is 22.5Kg. In step 7), the amount of the second batch of compound additives added is 27.5Kg. Others are the same as in Example 1.

[0047] Table 1 The main performance parameter table of the resin adhesive described in embodiment 1 and 2

[0048]

[0049] It can be seen from Table 1 that the impregnated film paper produced by this process is 0.4mg / L, which is much higher than the national standard to ensure that the formaldehyde emission...

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Abstract

The invention discloses a low formaldehyde resin adhesive for decorative impregnating paper and a preparation method thereof, wherein the resin adhesive contains: 60% by weight of 37% formaldehyde, 40% by weight of 98% urea, and 1.0-1.5% by weight of composite auxiliary agents which contains 0.2-0.3% by weight of curing agent, 0.5-0.8% by weight of cross-linking agent, and 0.3-0.4% by weight of reinforcing agent. The resin adhesive has the characteristics of low free formaldehyde content and high water resistance, and enhances the internal bonding force of the resin adhesive while reduces the mol ratio, which reduces the free formaldehyde releasing amount of the impregnating paper in the impregnating paper production process, and makes sure the each physical index demand of the decorative plate in the secondary hot pressing process.

Description

technical field [0001] The invention relates to a resin adhesive adhesive, in particular to a low-formaldehyde resin adhesive for decorative film paper and a preparation method thereof. Background technique [0002] Resin adhesive impregnated paper decoration is made of decorative paper printed with decorative patterns and monochrome, impregnated with resin adhesive, used for facing particleboard, plywood, fiberboard, etc. The resin adhesives used for impregnating decorative paper mainly include thermoplastic resin adhesives, and thermosetting resin adhesives include urea-formaldehyde resin adhesives, polyurethane, phenolic resin adhesives, epoxy resin adhesives, melamine resin adhesives, etc. Dipropylene phthalate resin adhesive impregnated with adhesive film paper to decorate wood-based panels requires strict technology, the price of organic raw materials for synthesizing monomers is relatively expensive, and the cost of resin adhesive is high, which limits its wide applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J161/24C09J11/06C09J11/04C08G12/12
Inventor 张赟朱伟彬梁军
Owner GUANGDONG T&H NEW MATERIALS CO LTD
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