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Vinyl acetate wood adhesive and preparation method thereof

A vinyl acetate and wood adhesive technology, applied in the field of polymer chemistry, can solve the problems of poor water resistance, cold resistance and moisture resistance, decreased adhesive strength of adhesive films, poor mechanical stability, etc., and achieves good water resistance, The effect of stable reaction and improved emulsion stability

Inactive Publication Date: 2015-01-21
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although PVAc emulsion has characteristics such as low price, convenient production, and nontoxicity, there are more shortcomings: water resistance, cold res

Method used

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  • Vinyl acetate wood adhesive and preparation method thereof
  • Vinyl acetate wood adhesive and preparation method thereof
  • Vinyl acetate wood adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The vinyl acetate wood adhesive of the present invention is made of the following components in parts by weight:

[0035]

[0036] The preparation process is as follows:

[0037] (1) Prepare the emulsifier solution: add 30 parts of deionized water and 3 parts of the compound emulsifier into the emulsifier tank, start the stirrer, heat up to 60°C, stir for 30 minutes, and fully mix and dissolve;

[0038] (2) Prepare initiator solution: add 10 parts of deionized water and 0.4 parts of tert-butyl hydroperoxide to initiator tank a, stir to dissolve, and add 10 parts of deionized water and 0.2 parts of zinc formaldehyde sulfoxylate to initiator tank b. Stir to dissolve;

[0039] (3) Mix 80 parts of vinyl acetate and 12 parts of ethylene tertiary carbonate to obtain a mixed monomer;

[0040] (4) Add 40 parts of deionized water to the reactor, start the agitator, add 8 parts of vinyl acetate and ethylene copolymer emulsion, 3 parts of protective colloid, 0.3 parts of sodium bicarbonate...

Embodiment 2

[0044] The vinyl acetate wood adhesive of the present invention is made of the following components in parts by weight:

[0045]

[0046]

[0047] The preparation process is as follows:

[0048] (1) Prepare the emulsifier solution: add 40 parts of deionized water and 7 parts of the compound emulsifier into the emulsifier tank, start the stirrer, heat up to 60°C, stir for 30 minutes, and fully mix and dissolve;

[0049] (2) Prepare initiator solution: add 15 parts of deionized water and 0.8 parts of tert-butyl hydroperoxide to initiator tank a, stir to dissolve, and add 15 parts of deionized water and 0.4 parts of zinc formaldehyde sulfoxylate to initiator tank b. Stir to dissolve;

[0050] (3) Mix 180 parts of vinyl acetate and 25 parts of ethylene tertiary carbonate to obtain a mixed monomer;

[0051] (4) Add 70 parts of deionized water to the reactor, start the agitator, add 24 parts of vinyl acetate and ethylene copolymer emulsion, 8 parts of protective colloid, 0.6 parts of sodium ...

Embodiment 3

[0054] Example 3 Performance Test

[0055] The following performance index tests were performed on the wood adhesives prepared in Examples 1 and 2:

[0056] (1) Appearance: Direct observation method

[0057] (2) Viscosity: tested according to national standard GB2794-81

[0058] Detection conditions: room temperature (25±1℃), 2# rotor, rotating speed 60r / min.

[0059] Testing method: Put the sample to be tested into the testing container, immerse the selected rotor in the container, and ensure that the liquid surface of the sample covers the rotor. Turn on the instrument, keep it at 25±1℃ for 10 minutes, and record the result after the indicator reaches a basic stability. Repeat the measurement three times and then take the average.

[0060] (3) Bonding strength: testing according to standard HG / T2727-2010.

[0061] Detection method: spread the evenly stirred adhesive on the two bonding surfaces of the test piece, the bonding area is 15mm×15mm, and the amount of glue is about 100g / m 2 ....

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Abstract

The invention discloses a vinyl acetate wood adhesive and a preparation method thereof, and relates to the field of high polymer chemistry. The vinyl acetate wood adhesive is prepared by taking vinyl acetate and vinyl versatate as mixed monomers, diacetone-acryloamide and carbonic acid dihydrazide as cross-linking agent, copolymer emulsion of vinyl acetate and ethylene as seed emulsion, polyethylene biformaldehyde as a protecting adhesive, tert-butyl hydroperoxide and zinc formaldehyde sulfoxylate as initiators and sodium bicarbonate as a reducing agent by using a seed emulsion polymerization method. The vinyl acetate wood adhesive disclosed by the invention has the advantages of high adhesion strength, good water resistance, low glass transition temperature and good stability, can be used as an adhesive for splicing wood and processing artificial plates and can be also used in the fields of waterproofness and packaging.

Description

Technical field [0001] The invention relates to the field of polymer chemistry, in particular to a vinyl acetate wood adhesive and a preparation method thereof. Background technique [0002] With the development of economy, synthetic adhesives are increasingly used in various fields. Among the adhesives currently in use, many are solvent-based trialdehyde resins---urea-formaldehyde resin (UF), phenolic resin (PF) and melamine formaldehyde Resin (VIF), this "trialdehyde glue" in addition to poor water resistance and short storage period, releases a large amount of formaldehyde during production and use, which has a great impact on environmental pollution. Long-term human exposure can also cause respiratory tract The risk of diseases, malignant tumors, leukemia and other diseases. The amount of glue used in the wood industry accounts for more than 60% of the production of adhesives. Domestic forest resources are limited, and only small-diameter wood or man-made panels can be used...

Claims

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Application Information

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IPC IPC(8): C09J131/04C09J11/06C08F218/08C08F218/00C08F220/58C08F210/02C08F2/30C08F2/26C08F4/40
Inventor 唐雅玲
Owner GUANGXI UNIV
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