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Use of bonding resin

A technology of adhesive resin and application, applied in the direction of starch adhesive, protein adhesive, polysaccharide adhesive, etc., can solve the problems of long pressing time and high pressing temperature

Pending Publication Date: 2022-02-01
STORA ENSO OYJ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One problem with the technique described in the article is the long pressing time and high pressing temperature

Method used

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  • Use of bonding resin
  • Use of bonding resin
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] First, a tannin solution was prepared by adding 70 g of powdered tannin (91% solids content) and 107 g of water to a 500 ml beaker at ambient temperature and stirring until the tannin was completely and uniformly dispersed. Then, 24 g of a 50% sodium hydroxide solution were added to the tannin dispersion. The composition was stirred for 120 minutes to ensure complete dissolution of the tannins in the alkaline medium.

Embodiment 2

[0030] An adhesive formulation was prepared by mixing 23.5 g of the tannin alkaline solution from Example 1 and 7.5 g of the polyglycerol polyglycidyl ether in a beaker for 20 minutes at room temperature using an overhead stirrer.

[0031] The adhesive formulations were tested in lap-joint tests using an Automated Bonding Evaluation System (ABES) tensile tester.

[0032] For this purpose a relatively thin beech veneer with a thickness of 0.6mm cut into 105x20mm pieces was used. The resin was applied to an area of ​​5mm x 20mm on one side of one end of the two blocks. The overlapping ends of the resin-coated series of test specimens were placed in a hot press at 5 kg / m 2 The pressure was pressed together, using a pressing time of 90 seconds at a pressing temperature of 150 °C. Average data from 5 test specimens are shown in Table 1.

[0033]

[0034]

[0035] Table 1: Shear Strength Using ABES

Embodiment 3

[0037] First, a starch solution was prepared by adding 27 g of powdered starch (90% solid content) and 49 g of water to a 500 ml beaker at a temperature of 80° C. and stirring for 60 minutes. Then, the temperature of the starch dispersion was lowered to 40° C. and 4.9 g of 50% sodium hydroxide solution were added to the starch dispersion. The composition was stirred for 120 minutes to ensure complete dissolution of the starch in the alkaline medium.

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PUM

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Abstract

The present invention relates to the use of a bonding resin prepared by providing an aqueous solution comprising at least one biobased product selected from tannin, starch, soy protein, glycerol, chitin, pectin, dextrose or other carbohydrates, or a mixture thereof and mixing the aqueous solution with one or more of certain crosslinkers such as ethers, and optionally one or more additives. The bonding resin is used in the manufacture of laminates, mineral wool insulation or wood products, such as engineered wood products, such as plywood, oriented strandboard (OSB), laminated veneer lumber (LVL), medium density fiberboards (MDF), high density fiberboards (HDF) or particle boards. Preferably, the bonding resin does not comprise lignin.

Description

technical field [0001] The present invention relates to the purposes of binding resin, and described binding resin is prepared by following: provide and comprise and be selected from tannin (tannin), starch, soybean protein, glycerin, chitin, pectin, glucose (dextrose, dextrose) or An aqueous solution of at least one biobased product of other carbohydrates or mixtures thereof, and mixing the aqueous solution with one or more of the following substances and optionally one or more additives, said one or more substances: glycerol Diglycidyl ether, polyglycerol diglycidyl ether, polyglycerol polyglycidyl ether, glycerol triglycidyl ether, sorbitol polyglycidyl ether, alkoxylated glycerin polyglycidyl ether, trimethylolpropane triglycidyl ether Glyceryl ether, trimethylolpropane diglycidyl ether, polyoxypropylene glycol diglycidyl ether, polyoxypropylene glycol triglycidyl ether, diglycidyl ether of cyclohexanedimethanol, m-phenylene Diphenol diglycidyl ether, isosorbide diglycidy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00B27N3/00B32B21/00C09J101/00C09J103/00C09J105/00C09J189/00C09J193/00C09J199/00C08L1/00C08L3/00C08L5/00C08L63/00C08L89/00C08L93/00C08L99/00
CPCC08L3/00C08L63/00C08L89/00C09J103/00C09J105/00C09J163/00C09J189/00C09J193/00C09J105/06C09J105/08C08L5/08C08L5/06B27N7/005B27N3/02B27N3/04B27N3/007B27N3/002C08L91/00C08L3/02C09J103/02B32B21/00C09J101/00C09J199/00C08L1/00C08L5/00C08L93/00C08L99/00B27D1/04B32B7/12B32B21/042
Inventor B.纳斯利巴基尔A.扎法尔J.埃克斯特罗姆
Owner STORA ENSO OYJ
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