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Nano-alumina-modified phenolic resin adhesive and its preparation method and use

A technology of nano-alumina and phenolic resin, applied in the direction of adhesives, aldehyde/ketone condensation polymer adhesives, adhesive types, etc., can solve the problems of affecting catalytic efficiency, difficult to disperse uniformly, poor solubility, etc., to reduce formaldehyde The effect of release volume, enhanced performance, broad market prospects and application value

Active Publication Date: 2014-11-19
INT CENT FOR BAMBOO & RATTAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of these metal oxides and inorganic salts have poor solubility in the aqueous environment of phenolic resin, and it is difficult to fully disperse evenly, which affects the catalytic efficiency. At the same time, the different types of metal ions will affect its effect.
Since there is no technology to use aluminum oxide compounds as a curing catalyst for phenolic resins, it has been reported

Method used

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  • Nano-alumina-modified phenolic resin adhesive and its preparation method and use
  • Nano-alumina-modified phenolic resin adhesive and its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) 188 grams of phenol, 50 grams of mass fraction are 50% sodium hydroxide aqueous solution, 46 grams of water and 240 grams of mass fraction are 37% formaldehyde solution to join in the mechanically stirred reactor that has included reflux condenser, thermometer , heated up to 85°C under mechanical stirring, held for 50 minutes, and cooled to 75°C to obtain reactant I.

[0044] (2) in the reactant I of step (1), according to mass ratio 1.2:1:0.8, add 52 gram mass fractions altogether in three batches and be 37% formaldehyde aqueous solution and 25 gram mass fractions be 50% sodium hydroxide aqueous solution, The temperature was raised to 85° C., and the reaction was kept for 120 minutes to obtain reactant II.

[0045] (3) When the reactant II viscosity of step (2) reaches 400 centipoise, stop the reaction, and add 10 grams of sodium hydroxide aqueous solution and 8 grams of urea with a mass fraction of 50%, stir evenly, and cool to 40° C. to obtain Reactant III.

[...

Embodiment 2

[0048] (1) 194 grams of phenol, 72 grams of mass fraction are 40% sodium hydroxide aqueous solution, 40 grams of water and 250 grams of mass fraction are 37% formaldehyde solution to join in the mechanically stirred reactor that has included reflux condenser, thermometer , the temperature was raised to 92°C under mechanical stirring, the reaction was held for 40 minutes, and the temperature was lowered to 80°C to obtain reactant I.

[0049] (2) in the reactant I of step (1), according to mass ratio 1.1:1:0.9, add 62 gram mass fractions altogether in three batches and be 37% formaldehyde aqueous solution and 35 gram mass fractions be 40% sodium hydroxide aqueous solution, The temperature was raised to 85° C., and the reaction was maintained for 90 minutes to obtain reactant II.

[0050] (3) When the reactant II viscosity of step (2) reaches 100 centipoise, stop the reaction, and add 15 grams of mass fraction of 30% sodium hydroxide aqueous solution, 10 grams of urea, stir evenl...

Embodiment 3

[0053] (1) 48 grams of phenol, 24 grams of mass fraction are 60% sodium hydroxide aqueous solution, 8 grams of water and 68 grams of mass fraction are 37% formaldehyde solution to join in the mechanically stirred reactor that has included reflux condenser, thermometer , the temperature was raised to 80°C under mechanical stirring, the reaction was held for 60 minutes, and the temperature was lowered to 65°C to obtain reactant I.

[0054] (2) divide in the reactant I of step (1) according to mass ratio 1.5:1:0.5 and divide into three batches and add 20 gram mass fractions altogether and be 37% formaldehyde aqueous solution and 4 gram mass fractions be 60% sodium hydroxide aqueous solution , the temperature was raised to 75° C., and the reaction was held for 180 minutes to obtain reactant II.

[0055] (3) When the reactant II viscosity of step (2) reaches 200 centipoise, stop the reaction, and add 8 grams of sodium hydroxide aqueous solution and 6 grams of urea with a mass fract...

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Abstract

The invention relates to a nano-alumina-modified phenolic resin adhesive and its preparation method and use. Through use of nano-alumina, appropriate selection of assistant ingredients and improvement of processes, integral performances of the adhesive are effectively improved. The nano-alumina-modified phenolic resin adhesive has wide industrial application values in possessing manufacture of wood materials or bamboo materials such as bamboo wood plywood, a particieboard, an oriented particieboard, laminated wood, integrated wood materials and scrimber.

Description

technical field [0001] The present invention relates to a kind of phenolic resin adhesive and its preparation method and the purposes in wood processing, more specifically relate to a kind of nano-alumina modified phenolic resin adhesive and its preparation method and in the plywood of bamboo or wood, chipboard, layer Applications in processing and manufacturing industries such as laminated timber, laminated timber, and recombined timber. Background technique [0002] Phenolic resin is a thermosetting resin. Because of its high degree of branching and crosslinking, it has high strength and good water resistance, and has many advantages such as excellent heat resistance, wear resistance and chemical corrosion resistance. Therefore, phenolic resin adhesive It is often used as a high-performance adhesive product in the manufacture of outdoor structural materials, with high economic added value. The use of adhesives in the wood processing industry is very extensive, and phenoli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J161/34C09J11/04C09J11/06C09J11/08C08G14/08
Inventor 张融江泽慧费本华覃道春
Owner INT CENT FOR BAMBOO & RATTAN
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