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Preparation method of modified biomass liquefied resin adhesive with high water resistance

A technology of water resistance and biomass, applied in the direction of adhesives, aldehyde/ketone condensation polymer adhesives, adhesive types, etc., can solve the problem that the water resistance of biomass liquefied resin adhesives is not ideal, and it is not suitable for high water resistance structural plywood, etc. Problems, to achieve low cost, low toxicity, and improve the effect of water-resistant bonding strength

Active Publication Date: 2016-01-06
北京光纪国际生物科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the liquefaction conversion process of biomass materials, cellulose and some cellulose degradation products contain a large number of hydrophilic groups, and these hydrophilic groups cannot fully participate in the reaction with formaldehyde in the further resinification process. As a result, the water resistance of the biomass liquefied resin adhesive is not ideal, and it is not suitable for the production of outdoor high water resistance structural plywood, such as outdoor heavy bamboo flooring, ship plywood, container floor, train car floor, etc.

Method used

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Examples

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preparation example Construction

[0015] The preparation method of the modified biomass liquefied resin adhesive with high water resistance comprises the following process steps:

[0016] 1) Preparation of biomass phenol liquefaction

[0017] Remove the soil and debris on the surface of the biomass material, dry and crush it into biomass powder; mix the biomass powder and molten phenol evenly, add the mixture of biomass powder and molten phenol into an inorganic medium strong acid or an organic strong acid, and heat it at 120°C~ React at 140°C for 1.0~2.0h, add caustic soda solution, adjust the pH value to alkaline, lower the temperature to below 40°C, and obtain biomass phenol liquefaction;

[0018] 2) Preparation of biomass phenol liquefied formaldehyde resin, namely component A

[0019] Add the biomass phenol liquefied product and formaldehyde solution into the reactor in proportion, raise the temperature to 40~60°C and keep it for 30~60min; then continue to raise the temperature to 85~90°C, react at this ...

Embodiment

[0030] Add 600g of peanut shell liquefaction and 400g of 37% formaldehyde solution into a 1000ML reactor, start stirring, raise the temperature to 50°C and keep it for 40min, then continue to heat up to 87~90°C for 70min, when the viscosity reaches 400mPa.s Lower the temperature and discharge the material to make component A;

[0031] Add 500g of formaldehyde solution with a mass fraction of 37% and 4g of NaOH solution with a mass fraction of 40% to a 1000ML reactor, start stirring and add 190g of melamine and 50g of urea, 25g of methanol, and then add 20g of a 10% mass fraction of polyvinyl alcohol solution, Keep the reaction at 90°C for 3 hours, and when the pH value is 7.4, cool down to below 35°C and discharge to make component B;

[0032] Mix and stir 300gd of component A and 700g of component B evenly to prepare a highly water-resistant modified biomass liquefied resin adhesive. The solid content of the adhesive is 48%, and the storage period is not less than 30 days. ...

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Abstract

The invention relates to a preparation method of a modified biomass liquefaction resin adhesive with high water resistance. The method comprises the following technological steps: Step 1, preparation of a biomass phenol liquefaction product; Step 2, preparation of biomass phenol liquefaction formaldehyde resin, namely a component A; Step 3, preparation of melamine urea-formaldehyde resin, namely a component B; and Step 4, preparation of the modified biomass liquefaction resin adhesive with high water resistance. The invention has advantages as follows: the modified biomass liquefaction resin adhesive with high water resistance is stable to store; a sizing technology and a hot-pressing technology of the adhesive provided by the invention are the same as those of a traditional phenolic resin adhesive; cost is low; toxicity is low; and water-resistant bonding strength of the biomass liquefaction resin adhesive can be greatly enhanced. It shows through tests that bonding strength mean value of a poplar plywood form test piece prepared from the adhesive prepared by the method reaches more than 1.5MPa after the poplar plywood form test piece successively undergoes 4h of water boiling, 20h of drying at 63+ / -2 DEG C, 4h of water boiling and natural cooling.

Description

technical field [0001] The invention relates to the preparation of a highly water-resistant modified biomass liquefied resin adhesive for outdoor wood-based panels by using biomass materials such as peanut shells, camellia oleifera shells, bark powder, and walnut shells through phenol liquefaction, resinization, and modification technologies method. The invention belongs to the technical fields of comprehensive utilization of agricultural and forestry biomass and wood adhesives. Background technique [0002] Biomass materials such as peanut shells, camellia oleifera shells, bark powder, and walnut shells are rich in lignin, hemicellulose and other components, and their degree of polymerization is relatively low. They can be degraded under the liquefaction catalysis of phenol and strong acid. Reactive small molecular substances, and then react with formaldehyde to make biomass liquefied resin adhesive. Compared with traditional phenolic resins, this type of adhesive has the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J161/30C09J161/06C08G12/38C08G8/08
Inventor 孙丰文刘龙龙张茜贺磊
Owner 北京光纪国际生物科技服务有限公司
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