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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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] Because the preservative wood contains a large amount of preservatives, th

Method used

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

Examples

Experimental program
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Effect test

Example Embodiment

[0048] Example 1

[0049] 1. Crushing of waste anticorrosive wood

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

[0051] 2. Liquefaction treatment of wood flour

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

[0053] 2) Place the three-necked glass bottle in an oil bath preheated to 150°C, install the condenser, stir and mix, and perform the liquefaction treatment of wood flour at 150°C to obtain the liquefaction treatment mixture, where the stirring rate is 1058 rpm ; Liquefac...

Example Embodiment

[0066] Example 2

[0067] 1. Crushing of waste anticorrosive wood

[0068] The waste preservative wood Populus tomentosa treated with ACQ preservative (a water-soluble preservative made from a combination of copper quaternary ammonium salt containing ammonia-soluble alkyl amine and copper salt) is crushed into wood powder with a particle size of 20 mesh;

[0069] 2. Liquefaction treatment 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 to phenol is 1:4; sulfuric acid The weight ratio of solution to phenol is 8:100; the weight ratio of decalin to phenol is 25:100;

[0071] 2) Place the three-neck glass bottle in an oil bath preheated to 160°C, install the condenser, stir and mix, and perform the liquefaction treatment of wood flour at 160°C to obtain the liquefaction...

Example Embodiment

[0081] Example 3

[0082] 1. Crushing of waste anticorrosive wood

[0083] Crush the waste preservative wood masson pine treated with ACQ (a water-soluble preservative made from a combination of ammonia-soluble alkyl amine copper quaternary ammonium salt and copper salt) preservative into wood powder with a particle size of 50 mesh;

[0084] 2. Liquefaction treatment of wood flour

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

[0086] 2) Place the three-necked glass bottle in an oil bath preheated to 150°C, install the condenser, stir and mix, and perform the liquefaction treatment of wood flour at 150°C to obtain the liquefaction treatment mixture, where ...

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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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