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Isocyanate based wood material adhesive and application method thereof

An isocyanate-based, wood-based material technology, applied in polyurea/polyurethane adhesives, adhesive types, non-polymer adhesive additives, etc., can solve difficult problems such as waterproofing of wood-based panels, and achieve excellent waterproof performance The effect of improving mechanical properties, mechanical strength, and enhancing water resistance

Active Publication Date: 2020-05-08
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, it is difficult to solve the waterproofing problem of wood-based panels using isocyanate as an adhesive in the prior art, and it is necessary to develop a waterproof solution for isocyanate adhesives for wood-based panels

Method used

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  • Isocyanate based wood material adhesive and application method thereof
  • Isocyanate based wood material adhesive and application method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0059] Preparation of polyisocyanate derivatives

[0060] Heat the polyisocyanate to 60-70°C, add the polyol into the polyisocyanate under stirring condition, keep the temperature at 60-70°C and react for 2-3 hours to obtain polyisocyanate derivatives. The reaction conditions and results are shown in Table 1.

[0061] Table 1 Derivative reaction conditions and results

[0062]

Embodiment 1

[0064] Poplar shavings with a moisture content of 8-10wt% were selected as the wood substrate for the press plate test. Weigh 2000g of poplar wood shavings on the surface and add them to the mixer, respectively weigh 60g of polymethylene polyphenyl polyisocyanate PM-200 (Wanhua Chemical Group Co., Ltd.), polyamide 651 (Changzhou Deye Chemical Co., Ltd., amine value 380~450mg / KOH / g) 24g, silane coupling agent γ-aminopropyltriethoxysilane (KH-550, Guangzhou Zhongjie Chemical Technology Co., Ltd.) 0.3g in a beaker, connect a spray gun to air compression Machine, the above three raw materials are sprayed into the mixer in the stirring state from the spray gun in turn and stirred for 40-60s. Carry out the sizing of core shavings according to the same process conditions. According to the paving ratio of 360g surface layer poplar wood shavings + 980g core layer shavings + 360g surface layer poplar wood shavings, the shavings are paved in a 350mm*350mm*100mm mold and pre-pressed into...

Embodiment 2

[0066] Poplar shavings with a moisture content of 8-10wt% were selected as the wood substrate for the press plate test. Take by weighing 2000g of surface layer poplar wood shavings and add in the mixer, respectively weigh 50g polymethylene polyphenyl polyisocyanate derivative 1#, 10g polymethylene polyphenyl polyisocyanate derivative 6#, polyamide 651 (Changzhou Germany Ye Chemical Co., Ltd.) 3g, polyamide 200 (Changzhou Deye Chemical Co., Ltd., amine value 230 ~ 260mg KOH / g) 3g, isopropyl titanate triisostearate (PN-130, Nanjing Pinning coupling agent Co., Ltd.) 15g in a beaker, connect a spray gun to an air compressor, spray the above three raw materials from the spray gun into the mixer under stirring state and stir for 40-60s. Carry out core layer shaving sizing according to the same process. According to the paving ratio of 360g surface shavings + 980g core shavings + 360g surface shavings, the shavings are laid in a 350mm*350mm*100mm mold and pre-pressed into a slab, an...

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Abstract

The present invention relates to an isocyanate-based wood material adhesive, comprising the following components: (a) polyisocyanate and / or derivatives thereof, (b) polyamide and (c) coupling agent; the present invention also provides the above-mentioned adhesive The method of application of the mixture. When the wood material adhesive composition of the present invention is used as an adhesive for wood-based panels, it has outstanding waterproof performance and excellent mechanical properties.

Description

technical field [0001] The invention relates to an isocyanate-based wood material adhesive and an application method thereof, in particular to an isocyanate-based wood material adhesive for wood-based panels. Background technique [0002] At present, the commonly used synthetic adhesives for wood-based panels are aldehyde adhesives, that is, "trialdehyde adhesives" represented by adhesives such as urea-formaldehyde resin (UF), phenolic resin (PF), and melamine-formaldehyde resin. These three types of adhesives all use formaldehyde as a synthetic raw material. Formaldehyde escapes from adhesive products during production and use. It is regarded as one of the main sources of indoor air pollution. The pollution cycle is long and difficult to remove. It has always plagued man-made development of the board industry. [0003] Due to environmental considerations, aldehyde-free isocyanate adhesives have been used more and more in recent years. In addition to being formaldehyde-fre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/02C09J11/06C08G18/60
CPCC08G18/603C08K5/10C08K5/5425C08K5/544C08K5/548C09J11/06C09J175/02C08G18/60
Inventor 涂松齐旺顺李厚义孙卫华张梓军吕兵
Owner WANHUA CHEM GRP CO LTD
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