Urea-formaldehyde resin wood adhesive modifier and applications thereof

A wood adhesive and urea-formaldehyde resin technology, applied in the directions of adhesive additives, adhesives, non-polymer adhesive additives, etc., can solve the problem of high brittleness of the adhesive layer, and achieve the improvement of veneer strength, cost reduction, and formaldehyde release. volume reduction effect

Inactive Publication Date: 2014-01-29
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high brittleness of the adhesive layer after the traditional urea-formaldehyde resin adhesive is cured, especially due to the reaction characteristics in the process of preparing urea-formaldehyde resin, some free components such as free formaldehyde inevitably exist in the adhesive, which brings harm to the environment and the human body. certain hazards, which limits its application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Urea-formaldehyde wood adhesives are unmodified.

[0017] E2 grade urea-formaldehyde resin adhesive 100kg, flour 20kg, stir evenly, according to the amount of glue applied 60g / m 2 Apply it to the fiberboard, and then paste it with oak veneer with a thickness of 0.2mm. Under the action of 1.1Mpa, it is hot-pressed at 110°C to form a finished board. The surface bonding strength of the veneered panels in the finished product is 1.0MPa, and the formaldehyde emission is 2.2mg / L.

Embodiment 2

[0019] Weigh 10kg of styrene-acrylic latex, 1kg of silicon dioxide particles, 1kg of light calcium carbonate, 1kg of titanium dioxide particles, 0.1kg of ferric chloride, 0.1kg of sodium dodecylsulfonate, and 1kg of polyethylene glycol according to the mass ratio. In 100kg E2 urea-formaldehyde resin adhesive, stir evenly, according to the amount of glue applied 60g / m 2 Apply it to the fiberboard, and then paste it with oak veneer with a thickness of 0.2mm. Under the action of 1.1Mpa, it is hot-pressed at 110°C to form a finished board. The surface bonding strength of the veneered panels in the finished product is 1.10MPa, and the formaldehyde emission is 1.4mg / L.

Embodiment 3

[0021] Weigh 20kg of styrene-acrylic latex, 5kg of silicon dioxide particles, 10kg of light calcium carbonate, 5kg of titanium dioxide particles, 0.1kg of ferric chloride, 0.1kg of sodium dodecylsulfonate, and 5kg of polyethylene glycol according to the mass ratio. In 100kg E2 urea-formaldehyde resin adhesive, stir evenly, according to the amount of glue applied 60g / m 2 Apply it to the fiberboard, and then paste it with oak veneer with a thickness of 0.2mm. Under the action of 1.1Mpa, it is hot-pressed at 110°C to form a finished board. The surface bonding strength of the veneered panels in the finished product is 1.15MPa, and the formaldehyde emission is 1.1mg / L.

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PUM

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Abstract

The invention discloses a urea-formaldehyde resin wood adhesive modifier and applications thereof. The urea-formaldehyde resin wood adhesive modifier disclosed by the invention comprises the following components in parts by weight: 1-10 parts of silica particles, 1-10 parts of light calcium carbonate, 1-10 parts of titanium dioxide particles, 0.1-0.5 part of ferric chloride, 1-5 parts of polyethylene glycol, and 0.1-0.5 part of sodium dodecyl sulfate. A urea-formaldehyde resin wood adhesive modified by the modifier is applied to the cementing processing of woods and bamboos, and the veneer strength of a finished product plate is increased by more than 10%, the cost is reduced by about 5%, and the formaldehyde release amount is reduced by more than 20%.

Description

(1) Technical field [0001] The invention relates to a wood adhesive modifier, in particular to a urea-formaldehyde resin wood adhesive modifier and application thereof. (2) Background technology [0002] Urea-formaldehyde resin adhesive is widely used in the bamboo wood processing industry because of its reasonable price, good workmanship, and colorless color. However, due to the high brittleness of the adhesive layer after the traditional urea-formaldehyde resin adhesive is cured, especially due to the reaction characteristics in the process of preparing urea-formaldehyde resin, some free components such as free formaldehyde inevitably exist in the adhesive, which brings harm to the environment and the human body. Certain hazards, thus limiting its application. (3) Contents of the invention [0003] In order to improve the toughness of the urea-formaldehyde resin adhesive, reduce the brittleness of the adhesive layer after curing and reduce harmful components such as fre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J161/24C09J125/14C09J171/08C09J11/04C09J11/06
Inventor 陈浩鲍滨福沈哲红刘铎
Owner ZHEJIANG FORESTRY UNIVERSITY
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