Method for producing urea formaldehyde resin adhesive

A urea-formaldehyde resin, a production method technology, applied in the direction of adhesives, aldehyde/ketone condensation polymer adhesives, monocarboxylic acid ester copolymer adhesives, etc., can solve the problem of brittleness, cracking, water resistance and bonding strength low problems, to achieve the effect of low cost and simple production process

Inactive Publication Date: 2011-09-21
段全义
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantages of urea-formaldehyde resin adhesive are colorless or milky white, fast curing, high transparency, good operability, abundant and easy-to-obtain raw materials, no pollution to the wood surface, and simple production process; its disadvantages are: high brittleness, easy to Internal stress causes cracks; water resistance and bonding strength are lower than phenolic resin; durability is slightly worse

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0006] Step 1: Add 70 parts of liquid urea-formaldehyde resin with a content of 60% into the reactor, gradually raise the temperature to 40°C, and start the stirrer at a speed of 30 rpm. Add 20 parts of polyhexene acetate and react for 1 hour.

[0007] Step 2: Add 2 parts of ammonium sulfate and 4 parts of wood flour, and keep warm for 1 hour.

[0008] Step 3: Add 1 part of cyanuric formaldehyde resin and 1 part of aluminum hydroxide, and keep warm for 0.5 hours.

[0009] Step 4: After the heat preservation reaction is completed, cool down to normal temperature, add 2 parts of new environmentally friendly formaldehyde, stir evenly, stop stirring, and discharge to get the finished product.

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PUM

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Abstract

The invention relates to a method for producing a urea formaldehyde resin adhesive. The product produced by the method is a main adhesive used in wood industries at home and abroad and can be used for adhering plate materials, veneers and building decorative plates. The urea formaldehyde resin adhesive has the advantages of no color or oyster white color, high curing speed, high transparency, high operability, rich and readily available raw materials, no pollution to the surfaces of wood materials and simple production process. The urea formaldehyde resin adhesive has the defects of high fragility, lower water resistance and adhesive strength compared with those of phenolic resin and low durability. In the method, the defects are shrunk to minimum and the advantages are maintained by a certain process. The urea formaldehyde resin adhesive is prepared from the raw materials such as liquid urea formaldehyde resin with content of 60 percent, polyhexenyl acetate, ammonium sulfate, wood powder, melamine glue formaldehyde resin, aluminium hydroxide and formaldehyde.

Description

Technical field: [0001] The product of the invention belongs to the field of chemical industry. Background technique: [0002] Urea-formaldehyde resin is a polymer obtained by the reaction of urea and formaldehyde. Due to the simple process and low cost of producing urea-formaldehyde resin, it has become one of the earlier developed thermosetting resins. Urea-formaldehyde resin adhesive is an adhesive produced from urea-formaldehyde resin as the main raw material. It is the main adhesive in the wood industry at home and abroad, and can be used for bonding boards, veneers, and building decorative boards. The advantages of urea-formaldehyde resin adhesive are colorless or milky white, fast curing, high transparency, good operability, abundant and easy-to-obtain raw materials, no pollution to the wood surface, and simple production process; its disadvantages are: high brittleness, easy to Internal stress causes cracks; water resistance and bonding strength are lower than phen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J161/24C09J131/04
Inventor 段全义
Owner 段全义
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