Formaldehyde-free artificial wood board and preparation method thereof

An artificial wood board and veneer technology, which is applied in the jointing of wooden veneers, veneer presses, manufacturing tools, etc., can solve environmental pollution and other problems, and achieve the effects of reducing pollution, strong implementability, and simple methods

Active Publication Date: 2021-06-04
浙江创通木业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Urea-formaldehyde resin contains unreacted free formaldehyde, and the release of free formaldehyde during the pressurization process may easily cause environmental po

Method used

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  • Formaldehyde-free artificial wood board and preparation method thereof
  • Formaldehyde-free artificial wood board and preparation method thereof
  • Formaldehyde-free artificial wood board and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0047] Preparation 1

[0048]Preparation of super bonded aqueous polyurethane: An superbly branched aqueous polyurethane in a superbly branched aqueous polyurethane is prepared in the reaction bottle, which is added to 65 ° C, and 5.4 gdMPa is dissolved in 27 ml of the reaction bottle. After the DMF, it was added to the reaction bottle equipped with IPDI, maintained at 65 ° C for 8 h; then fell to -10 ° C, and 4.2 g of DEOA was added dropwise to the reaction system, and after the drop is added, it is kept -10 ° C The reaction was continued for 4 h; then the reaction system temperature was raised to 90 ° C, and 0.027 g as the catalyst was added, and the reaction was continued at 90 ° C for 3 h, resulting in a colorless transparent liquid, 70 ° C to distillation 15 min, and the desired super branched after drying Waterborne polyurethane.

Example Embodiment

[0049] Preparation 2

[0050] Preparation of inner cross-linkaged aqueous polyurethane: 12 parts of polycarbonate diol and 12 parts of isocyanate solution were added to the reactor, the control ambient temperature was 80 ° C, reaction 1-2 h; Add 3 parts of acetone, 0.3 In-serial interchange agent, 6 parts of the composite chain extender (wherein the composite chain extender agent comprises 2 parts of dihydroxypropionic acid, 2 parts of dihydroxymethylbutyric acid and 2 parts of trihydroxypropane), 1 part The epoxy delate E51 and 1 part of epoxy dental E-44 were mixed for 2.5 h; after cooling to 30 ° C, then add triethylamine reaction for about 10 min, add 5 parts of deionized water, and allowing the device to heat up the device after 30 min. After 50 ° C, the decompression was distilled, 30 min, thereby producing an intra-crossing aqueous polyurethane emulsion.

Example Embodiment

[0051] Preparation Example 3

[0052] Preparation of a composite antibacterial agent: 10 parts of nano silver solution with 5 parts of adhesive fibers were mixed at 90 ° C for 1.5 hours after drying to obtain solid A; in accordance with chloride and urea mixture (in which choline choline and The mass ratio of urea was 2: 1) at a control temperature of 80 ° C for 1 hour, and the solid A was sequentially added at room temperature, and 5 parts of ionized water were sequentially added, 5 parts of butyl titanate were stirred for 1.5 hours to obtain a composite antibacterial agent.

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PUM

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Abstract

The invention relates to the field of artificial wood boards, and particularly discloses a formaldehyde-free artificial wood board and a preparation method thereof. The formaldehyde-free artificial wood board comprises a plurality of layers of veneers, a waterborne polyurethane adhesive is compounded between the adjacent veneers, and the waterborne polyurethane adhesive is prepared from the following raw materials including, by weight: 50 to 65 parts of compound waterborne polyurethane, 25 to 35 parts of polyacrylate, 0.1 to 2 parts of allyl polyoxyethylene ether, 1 to 2 parts of composite filler and 100 to 150 parts of water, wherein the composite filler comprises 0.1 to 0.2 part of modified polyacrylonitrile-based active carbon fiber. The formaldehyde-free artificial wood board has the advantage of reducing the pollution of the artificial board to the environment.

Description

technical field [0001] The application relates to the field of artificial wood boards, more specifically, it relates to a non-formaldehyde artificial wood board and a preparation method thereof. Background technique [0002] Wood-based panels are boards or molded products made of wood, which are separated by certain mechanical processing and glued with adhesives and other additives. They are mainly used in architectural decoration, home furnishing and other fields. [0003] Wood-based panels mainly include plywood, particleboard and fiberboard. Plywood is generally made of multiple single-pass wood adhesives. Wood adhesives include amino resin glue, polyurethane glue, etc. Urea-formaldehyde resin contains unreacted free formaldehyde, and the release of free formaldehyde during the pressurization process may easily cause environmental pollution, and traditional polyurethane adhesives use organic solvents such as toluene and xylacetone as dispersion media, which may easily cau...

Claims

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Application Information

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IPC IPC(8): B27D1/04B27D1/10B27D3/00B27K5/00B27G11/00C09J175/04C09J133/04C09J171/02C09J11/04
CPCB27D1/04B27D1/10B27D3/00B27K5/00B27G11/00C09J175/04C09J11/04C08L2205/03C08L33/04C08L71/02C08K7/24
Inventor 邱晓强
Owner 浙江创通木业有限公司
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