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Adhesive for wood and preparation method thereof

An adhesive and wood technology, applied in the directions of adhesives, adhesive types, graft polymer adhesives, etc., can solve the problems of poor water resistance and poor stability, and achieve the effect of low cost

Inactive Publication Date: 2010-11-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its water resistance and stability are poor, so it is imperative to develop a starch-based adhesive with better water resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Adhesive for wood, its components and parts by weight are:

[0030] 100 parts cornstarch

[0031] 400 parts of deionized water

[0032] 10 parts hydrogen peroxide

[0033] Sodium hydroxide 10 parts

[0034] 100 parts of grafted monomers (including 40 parts of vinyl acetate, 52 parts of butyl acrylate, 4 parts of acrylic acid, and 4 parts of acrylamide)

[0035] 4 parts of compound emulsifier (including: 2.5 parts of sodium dodecylsulfonate, 1.5 parts of OP-10)

[0036] Potassium persulfate 1.5 parts

[0037] Sodium bisulfite 0.5 part

[0038] 10 parts of urea

[0039] Glycerin 5 parts

[0040] Sodium benzoate 0.5 parts

[0041] Tributyl Phosphate 1 part

[0042] The preparation process is as follows:

[0043] 1) Get each component by weight parts, with 90 parts of deionized water, sodium hydroxide is mixed with the lye that mass fraction is 10%; With 11.3 parts of deionized water, potassium persulfate and sodium bisulfite are mixed with Initiator solution wit...

Embodiment 2

[0049] Adhesive for wood, its components and parts by weight are:

[0050] Tapioca starch 100 parts

[0051] 380 parts of deionized water

[0052] Sodium hypochlorite 20 parts

[0053] Sodium hydroxide 8 parts

[0054] 100 parts of grafted monomers (including 35 parts of vinyl acetate, 55 parts of butyl acrylate, 5 parts of acrylic acid, and 5 parts of N-methylol acrylamide)

[0055] 4 parts of compound emulsifier (including: 2 parts of sodium dodecylbenzenesulfonate, 2 parts of NP-102)

[0056] 2 parts ammonium persulfate

[0057] Sodium bisulfite 0.6 part

[0058] 15 parts of urea

[0059] Butyl phthalate 5 parts

[0060] Potassium sorbate 0.3 parts

[0061] Octanol 1 part

[0062] The preparation process is as follows:

[0063] 1) Get each component by weight parts, with 72 parts of deionized water, sodium hydroxide is mixed with the lye that mass fraction is 10%; With 14.7 parts of deionized water, ammonium persulfate and sodium bisulfite are mixed with mass frac...

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Abstract

The invention discloses an adhesive for wood. The adhesive comprises the following components in part by weight: 100 parts of starch, 300 to 500 parts of deionized water, 5 to 30 parts of oxidant, 5 to 15 parts of sodium hydroxide, 80 to 150 parts of grafting monomer, 3 to 9 parts of compound emulsifier, 1 to 3 parts of persulfate, 0.3 to 1.5 parts of sodium hydrogensulfite, 10 to 40 parts of urea, 5 to 10 parts of plasticizer, 0.1 to 1 part of preservative, and 1 to 3 parts of defoaming agent. The adhesive is prepared by oxidating, gelatinizing and emulsifying the starch; performing graft copolymerization on the starch and the pre-emulsion of the grafting monomer; and blending the mixture, the urea, the plasticizer, the preservative and the defoaming agent. Compared with the white latex for wood, the adhesive for wood has the advantages of preferable bonding strength, water resistance and stability, lower cost, environmental protection, and wide application in the fields of wood assembly, man-made boards and the like.

Description

technical field [0001] The invention relates to an adhesive and a preparation method thereof, in particular to an adhesive for wood and a preparation method thereof. Background technique [0002] At present, the most widely used wood adhesives are "trialdehyde glue" - urea-formaldehyde resin (UF), phenolic resin (PF) and melamine-formaldehyde resin (MF). This "trialdehyde glue" has poor water resistance and short storage period. , release a large amount of formaldehyde in the process of production and use, causing environmental pollution and endangering public health. With the improvement of my country's environmental protection laws and regulations, it is imperative to develop green adhesives that are non-polluting, non-toxic, and meet the requirements of "environmental protection, health, and safety". The types of wood adhesives will be updated at an accelerated rate, and will develop in the direction of water-based, solidified, solvent-free, and low-toxicity. Starch, as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J151/02
Inventor 沈烈贾伟灿王方权曹清华
Owner ZHEJIANG UNIV