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A kind of starch/phenolic resin composite adhesive and preparation method thereof

A composite adhesive and phenolic resin technology, applied in the field of wood adhesives, can solve the problems of short pot life, low bonding strength and interface incompatibility of modified adhesives, so as to improve storage stability and adhesive bonding. The effect of strength, good storage stability, simplified production and use process

Active Publication Date: 2018-01-19
NANJING HEADWAY FURNITURE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, starch adhesives have the disadvantages of low bonding strength and poor water resistance when used for wood bonding.
In view of this, the researchers used isocyanate to modify the starch adhesive to improve its bonding strength and water resistance, but the price of isocyanate is high, it mainly depends on imports, there is interface incompatibility with starch, and the high reaction of isocyanate The activity makes the modified adhesive have short service life and other shortcomings

Method used

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  • A kind of starch/phenolic resin composite adhesive and preparation method thereof

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Effect test

Embodiment 1

[0026] A kind of starch / phenolic resin composite adhesive of the present invention is made up of the raw material of following components: 162g starch, 243g water, 216g concentration are 15% polyvinyl alcohol 1788 aqueous solution, 0.22g ammonium persulfate, 1.62g sodium hypochlorite, 47.1g phenol, 40.6g mass concentration are 37% formaldehyde solution and 2g sodium hydroxide.

[0027] The preparation method of the starch / phenolic resin composite adhesive of the present embodiment may further comprise the steps:

[0028] (1) Add 47.1g of fused phenol, 28.4g of 37% formaldehyde solution and 2g of sodium hydroxide into the reactor, and heat up to 70°C at a constant rate; then add 12.2g of formaldehyde solution, react for 6 hours, cool down and discharge, Obtain phenolic resin;

[0029] (2) Add 216g of polyvinyl alcohol solution with a mass fraction of 15% into the reactor, then add 0.22g of ammonium persulfate and react at 40°C for 30min; then add 162g of starch, 243g of water ...

Embodiment 2

[0031] A kind of starch / phenolic resin composite adhesive of the present invention is made up of the raw material of following components: 162g starch, 378g water, 324g mass concentration are 10% polyvinyl alcohol 1799 aqueous solution, 0.52g ammonium persulfate, 3.24g sodium hypochlorite , 65.9g phenol, 85.22g mass concentration are 37% formaldehyde solution and 10 parts of sodium hydroxide.

[0032] The preparation method of the starch / phenolic resin composite adhesive of the present embodiment may further comprise the steps:

[0033] (1) Add 65.9g of molten phenol, 59.65g of formaldehyde solution with a mass concentration of 37% and 10g of sodium hydroxide into the reaction kettle, and raise the temperature to 75°C at a constant speed; then add 25.57g of formaldehyde solution, react for 7.2h, cool down and discharge , to obtain phenolic resin;

[0034] (2) Add 324g of polyvinyl alcohol solution with a mass fraction of 10% into the reactor, then add 0.52g of ammonium persul...

Embodiment 3

[0036] A kind of starch / phenolic resin composite adhesive of the present invention is made up of the raw material of following components: 162g starch, 648g water, 378g concentration are 5% polyvinyl alcohol 1788 aqueous solution, 0.76g ammonium persulfate, 4.86g sodium hypochlorite, 94.1g phenol, 162.3g mass concentration are 37% formaldehyde solution and 16g sodium hydroxide.

[0037] The preparation method of the starch / phenolic resin composite adhesive of the present embodiment may further comprise the steps:

[0038] (1) Add 94.1g of fused phenol, 113.61g of 37% formaldehyde solution and 16g of sodium hydroxide into the reactor, and heat up to 80°C at a constant rate; then add 48.69g of formaldehyde solution, react for 8 hours, cool down and discharge, Obtain phenolic resin;

[0039] (2) Add 378g of polyvinyl alcohol solution with a mass fraction of 5% into the reactor, then add 0.76g of ammonium persulfate and react at 60°C for 60min; then add 162g of starch, 648g of wa...

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Abstract

A starch / phenolic resin composite adhesive is composed of, by weight, 162 parts of starch, 243-648 parts of water, 216-378 parts of polyvinyl alcohol water solution, 0.22-0.76 part of ammonium persulfate, 1.62-4.86 part of sodium hypochlorite, 47.1-94.1 parts of phenol, 40.6-162.3 parts of formaldehyde solution and 2-16 parts of sodium hydroxide.Compared with an isocyanate modified starch adhesive, the starch / phenolic resin composite adhesive has the advantages that performance of the adhesive prepared can be regulated, production cost can be lowered, and the adhesive has higher storage stability, longer pot life, excellent waterproofness and high bonding strength.

Description

technical field [0001] The invention relates to the field of wood adhesives, in particular to a starch / phenolic resin composite adhesive and a preparation method thereof. Background technique [0002] Starch is a kind of natural polymer material with wide sources, low price and environmental friendliness. It has the advantages of non-toxic, no peculiar smell and no pollution. Today, with the emphasis on the sustainable development strategy, with the decrease of petroleum resources, chemical products based on petroleum will be replaced by renewable natural polymer substances. At present, the consumption of wood adhesives is very large. If starch can be used to replace or partially replace other synthetic polymers in wood adhesives, it will greatly promote the starch industry and the wood adhesive industry. At the same time, it has good economic value and social value. Therefore, starch-based adhesives have attracted more and more attention from scholars as environmentally f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J103/10C09J129/04C09J161/10C08G8/10
CPCC08G8/10C08L2205/03C08L2205/05C09J103/10C08L29/04C08L61/06
Inventor 左迎峰吴义强刘文杰肖俊华李萍赵星
Owner NANJING HEADWAY FURNITURE CO LTD
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