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Preparation method for waterproof starch adhesive for wood

A starch adhesive and water resistance technology, applied in the directions of starch derived adhesives, adhesive additives, adhesive types, etc., can solve the problems of insufficient water resistance and bonding strength, and achieve enhanced bonding strength and bonding The effect of strength enhancement and water resistance improvement

Inactive Publication Date: 2018-02-06
常州市瑞泰物资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is: Aiming at the problems of insufficient water resistance and bond strength of traditional starch adhesives, a preparation method of water-resistant starch adhesives for wood is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] Mix starch and yeast liquid in a fermentation tank at a mass ratio of 1:20, and ferment at a constant temperature and humidity for 7 days at a temperature of 38°C and a humidity of 75% to obtain fermented starch, which is freeze-dried and placed in Pulverize in a pulverizer to obtain degraded starch; mix degraded starch and water in a flask at a mass ratio of 1:12, and add crosslinking agent 0.20 times the mass of degraded starch and sodium hydroxide 0.08 times the mass of degraded starch to the flask in turn , move the flask into a digital speed measuring constant temperature magnetic stirrer, under the conditions of temperature 50°C and rotation speed 260r / min, stir and react at constant temperature for 3 hours, freeze-dry the material in the flask, and pulverize it in a pulverizer to obtain cross-linked Starch: first mix cross-linked starch and water in a beaker at a mass ratio of 1:20, and add nano-silica 0.10 times the mass of cross-linked starch to the beaker, move...

example 2

[0021] Mix starch and yeast liquid in a fermentation tank at a mass ratio of 1:20, and ferment at a constant temperature and humidity for 7 days at a temperature of 38°C and a humidity of 75% to obtain fermented starch, which is freeze-dried and placed in Pulverize in a pulverizer to obtain degraded starch; mix degraded starch and water in a flask at a mass ratio of 1:12, and add crosslinking agent 0.20 times the mass of degraded starch and sodium hydroxide 0.08 times the mass of degraded starch to the flask in turn , move the flask into a digital speed measuring constant temperature magnetic stirrer, under the conditions of temperature 50°C and rotation speed 260r / min, stir and react at constant temperature for 3 hours, freeze-dry the material in the flask, and pulverize it in a pulverizer to obtain cross-linked Starch; first mix the cross-linked starch and water in a beaker at a mass ratio of 1:20, and then add the organosilicon hydrolyzate with 0.4 times the mass of the cros...

example 3

[0023]Mix starch and yeast liquid in a fermentation tank at a mass ratio of 1:20, and ferment at a constant temperature and humidity for 7 days at a temperature of 38°C and a humidity of 75% to obtain fermented starch, which is freeze-dried and placed in Pulverize in a pulverizer to obtain degraded starch; mix degraded starch and water in a flask at a mass ratio of 1:12, and add cross-linking agent 0.20 times the mass of degraded starch and sodium hydroxide 0.08 times the mass of degraded starch to the flask in turn , move the flask into a digital speed measuring constant temperature magnetic stirrer, at a temperature of 50°C and a rotating speed of 260r / min, stir and react at a constant temperature for 3 hours, freeze-dry the material in the flask, and pulverize it in a pulverizer to obtain crosslinking Starch; first mix cross-linked starch and water in a beaker at a mass ratio of 1:20, and add nano-silica 0.10 times the mass of cross-linked starch to the beaker, move the beak...

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Abstract

The invention discloses a preparation method for waterproof starch adhesive for wood and belongs to the technical field of a high polymer material. The method comprises the following steps: mixing starch with yeast liquid, standing by and fermenting, and then freeze-drying, thereby acquiring degraded starch; mixing the degraded starch with water, and then adding a cross-linking agent and a catalyst, stirring and reacting and then freeze-drying and crushing, thereby acquiring the cross-linked starch; and mixing the cross-linked starch with water, adding nanometer silicon dioxide, ultrasonicallyoscillating, adding the organosilicone hydrolysate and the catalyst, stirring and reacting and then performing rotary evaporation concentration, thereby acquiring the waterproof starch adhesive for wood. The starch adhesive prepared according to the invention has excellent water resistance and higher adhesive strength.

Description

technical field [0001] The invention discloses a preparation method of a water-resistant starch adhesive for wood, which belongs to the technical field of polymer materials. Background technique [0002] Adhesives play a pivotal role in the full utilization of wood resources, such as traditional urea-formaldehyde resins, phenolic resins, melamine-formaldehyde resins, etc. Among the existing woodworking adhesive systems, the fatal defect of formaldehyde-based adhesives is that during the production and use of bonded wood products, harmful gases such as free formaldehyde will inevitably be released, which will endanger producers and consumers. health; although water-based polymer isocyanate adhesive (API) does not release free formaldehyde, its high viscosity, short pot life, and high cost limit its wide application in wood gluing; as a natural adhesive One, starch glue has the longest application history, and has the advantages of high strength, light weight, no corrosion, n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J103/04C09J11/04C09J11/08C08B31/00
CPCC09J103/04C08B31/003C08K2201/011C09J11/04C09J11/08C08L83/04C08K3/36
Inventor 陈刚徐颜峰张琳
Owner 常州市瑞泰物资有限公司
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