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Tough aldehyde-free soybean meal-based wood adhesive and preparation method thereof

A technology of wood adhesive and aldehyde soybean meal, which is applied in the field of tough aldehyde-free soybean meal based wood adhesive and its preparation, can solve the problems of poor water-resistant bonding performance, free formaldehyde emission of wood-based panels, etc., so as to improve water-resistant bonding Performance, bonding performance improvement, good process performance effect

Active Publication Date: 2019-09-24
山东千森木业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of biomass adhesives to prepare wood-based panels can solve the problem of free formaldehyde release from wood-based panels, which is an important way to solve the problem. However, most biomass adhesives have poor water resistance and bonding performance, which limits their industrial application.

Method used

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  • Tough aldehyde-free soybean meal-based wood adhesive and preparation method thereof

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Effect test

Embodiment 1

[0033] The present embodiment provides a preparation method of a tough aldehyde-free soybean meal-based wood adhesive, and the adhesive is prepared according to the following weight ratios:

[0034] Modified soybean meal based wood 30 kg

[0035] Branched long chain starch 3 kg

[0036] Polyacrylamide 0.1kg

[0037] Homemade multifunctional epoxy compound 2kg

[0038] Sodium hydroxide solution 0.3kg

[0039] The present embodiment also provides the preparation method of the above-mentioned adhesive, and the specific preparation steps are as follows:

[0040] (1) Weigh the components according to the weight ratio, add the branched long-chain starch into the dispersion medium water, sonicate for 15 minutes, then add half the weight of modified soybean meal-based wood, use a high-pressure homogenizer, under a pressure of 30MPa and 0.5 Under the action of the emulsifying force of MPa, the homogeneous emulsification was carried out for 20 minutes;

[0041] (2) Add the remainin...

Embodiment 2

[0043] The present embodiment provides a preparation method of a tough aldehyde-free soybean meal-based wood adhesive, and the adhesive is prepared according to the following weight ratios:

[0044] Modified soybean meal based wood 33kg

[0045] Branched long chain starch 6kg

[0046] Polyacrylamide 0.2kg

[0047] Homemade Multifunctional Epoxy Compounds 4kg

[0048] Sodium hydroxide solution 0.6kg

[0049] The preparation method of the adhesive described in this example is the same as that in Example 1.

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Abstract

The invention discloses a tough aldehyde-free soybean meal-based wood adhesive and a preparation method thereof. The adhesive comprises, by weight, 30-33 parts of a main agent, 70 parts of dispersed medium water, 3-6 parts of a reinforcing agent, 0.1-0.2 part of a viscosity regulator, 2-4 parts of a crosslinking agent and 0.3-0.6 part of a catalyst. The preparation method comprises the following steps of weighing each component according to the corresponding weight ratio first, adding the crosslinking agent into the dispersed medium water, adding the main agent and the reinforcing agent, and homogenizing and emulsifying the mixture for 20 minutes under the action of an emulsifying force of 0.5 MPa at the pressure of 30 MPa through a high-pressure homogenizer; then, adding the catalyst into the obtained mixture, triggering a reaction at 80 DEG C for 30 minutes, cooling a finished product to 30 DEG C, and then discharging the finished product. The adhesive is likely to form a crosslinking structure, high in crosslinking density and low in reaction temperature; the prepared adhesive is stable in performance, the weak interface layer is obviously reduced, the cost is lowered, the dry / wet strength is high, and the product quality is stably improved.

Description

technical field [0001] The invention relates to the field of plywood preparation, in particular to a tough aldehyde-free soybean meal-based wood adhesive and a preparation method thereof. Background technique [0002] my country's precious wood resources are relatively scarce, and plantation forest resources are abundant. The use of plantation fast-growing wood to prepare wood-based panels through adhesives is the main raw material for furniture flooring and interior decoration in the living environment. In 2017, my country's total output of wood-based panels was 295 million cubic meters Rice, accounting for about 50% of the world's total production, of which more than 60% are plywood products. Based on the average production of 9 cubic meters of wood-based panels per ton of adhesive, the consumption of adhesives for plywood in my country in 2017 was about 18 million tons (solid content of 50%), of which urea-formaldehyde resin and its modified products accounted for the tota...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/04C09J11/08C09J187/00C09J177/06C09J133/26C08G81/00C08G69/26C08G69/48C08B35/00
CPCC08B35/00C08G69/265C08G69/48C08G81/00C08L2205/035C09J11/08C09J189/04C08L87/005C08L77/06C08L33/26
Inventor 高强许超杰陈明松李建章周文瑞张伟
Owner 山东千森木业集团有限公司
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