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Phenol formaldehyde adhesive synthesized by using waste preservative timber and preparation method thereof

A phenolic resin and adhesive technology, applied in the direction of adhesives, aldehyde/ketone condensation polymer adhesives, adhesive types, etc., can solve the problem of increased residue rate, etc., and achieve the effect of improving comprehensive utilization rate and added value

Inactive Publication Date: 2009-12-09
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Because the preservative wood contains a large amount of preservatives, the residue rate after the liquefaction treatment of the preservative wood increases

Method used

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  • Phenol formaldehyde adhesive synthesized by using waste preservative timber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 1. Crushing of waste preservative wood

[0050] The waste anti-corrosion wood Chinese fir after being treated with CCA (copper chromium arsenic water-soluble preservative) is crushed into wood powder, and the particle size of the wood powder is 80 mesh;

[0051] 2. Liquefaction of wood flour

[0052] 1) wood powder, phenol, catalyst sulfuric acid solution and polymerization inhibitor tetralin are added to a three-necked glass bottle and mixed uniformly, wherein the mass percentage concentration of sulfuric acid solution is 36%; the weight ratio of wood powder and phenol is 1: 3; the weight ratio of sulfuric acid solution and phenol is 6: 100; the weight ratio of tetralin and phenol is 20: 100;

[0053] 2) Place the three-necked glass bottle in an oil bath preheated to 150°C, install a condenser, stir and mix well, and carry out liquefaction treatment of wood powder at 150°C to obtain a liquefaction treatment mixture, wherein the stirring rate is 1058rpm ; The liquefac...

Embodiment 2

[0067] 1. Crushing of waste preservative wood

[0068] The waste antiseptic wood Populus tomentosa treated with ACQ preservative (a water-soluble preservative compounded with ammonia-soluble alkylamine copper quaternary ammonium salt and copper salt) is pulverized into wood powder, and the particle size of the wood powder is 20 mesh;

[0069] 2. Liquefaction of wood flour

[0070] 1) Add poplar wood powder, phenol, sulfuric acid solution and decahydronaphthalene into a three-necked glass bottle and mix evenly, wherein the mass percentage concentration of the sulfuric acid solution is 40%; the weight ratio of wood powder and phenol is 1: 4; The weight ratio of solution and phenol is 8: 100; The weight ratio of decalin and phenol is 25: 100;

[0071] 2) Put the three-necked glass bottle in an oil bath preheated to 160°C, install the condenser, stir and mix well, and carry out liquefaction treatment of wood powder at 160°C to obtain a liquefaction treatment mixture, wherein the ...

Embodiment 3

[0082] 1. Crushing of waste preservative wood

[0083] The waste anticorrosion wood masson pine after ACQ (water-soluble preservative compounded with ammonia-soluble alkylamine copper quaternary ammonium salt and copper salt) preservative treatment is pulverized into wood powder, and the particle size of the wood powder is 50 orders;

[0084] 2. Liquefaction of wood flour

[0085] 1) Add wood powder, phenol, sulfuric acid solution and ethylene carbonate to a three-necked glass bottle and mix evenly, wherein the mass percent concentration of the sulfuric acid solution is 30%; the weight ratio of wood powder and phenol is 1:5; the sulfuric acid solution The weight ratio with phenol is 10:100; the weight ratio of ethylene carbonate and phenol is 15:100;

[0086] 2) Place the three-necked glass bottle in an oil bath preheated to 150°C, install a condenser, stir and mix well, and carry out liquefaction treatment of wood powder at 150°C to obtain a liquefaction treatment mixture, w...

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Abstract

The invention discloses a phenol formaldehyde adhesive prepared by using waste preservative timber and a preparation method thereof; the method comprises the following steps: first, liquefaction treatment is carried out on preservative timber treated by preservative and phenol under the action of catalyst and polymerization inhibitor to obtain preservative timber liquefaction product; then, polymerization reaction is carried out on the preservative timber liquefaction product and formaldehyde in alkaline solution to obtain the phenol formaldehyde adhesive. Compared with the phenol formaldehyde adhesive synthesized by adopting a conventional method, the phenol formaldehyde adhesive prepared by the invention has higher activity, and can meet the quality index prescribed by the national plywood standard that corresponding strength is greater than 0.7MPa in terms of bond strength. The phenol formaldehyde adhesive is produced by taking waste preservative timber as raw material, thus not only saving phenol deriving from petrochemistry resource and reducing toxicity, but also reducing the pollution of the waste preservative timber on the natural environment and lowering the cost of production.

Description

technical field [0001] The invention relates to a novel adhesive based on aldehyde condensation polymers and a preparation method thereof, in particular to a wood liquefaction-modified phenolic condensate adhesive and a preparation method thereof. Background technique [0002] Phenolic resin adhesive has good weather resistance and is one of the three major adhesives in the wood-based panel industry, but its high cost limits its wide application. With the requirements of sustainable development and the enhancement of people's awareness of environmental protection, the research and development of environment-friendly products has attracted more and more international attention and attention. Lignocellulosic materials, as a natural and renewable resource, are increasingly attracting widespread interest. The preparation of adhesives from liquefied wood has become a new way to make full use of wood waste and solve the environmental pollution problems of existing adhesives. [...

Claims

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Application Information

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IPC IPC(8): C09J161/06
Inventor 张求慧赵广杰郭叙雄
Owner BEIJING FORESTRY UNIVERSITY
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