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Compound foaming adhesive for light shaving board

A technology for compounding foam and particleboard, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problems of failure to form large-scale industrial production, immature production and application, etc. Thickness expansion ratio, fine particles and easy to disperse, the effect of increasing fluidity

Active Publication Date: 2020-06-05
GUANGXI FORESTRY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Scientific researchers at home and abroad have done some research on lightweight particleboard, but it is still immature in production and application. The research and development of foaming adhesives is in its infancy, and has not been able to form large-scale industrial production. It is urgent to develop competitive advantages for lightweight particleboard. Foaming adhesive for high-quality particleboard industry to save wood resources, reduce processing energy consumption and production and transportation costs, etc.

Method used

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  • Compound foaming adhesive for light shaving board
  • Compound foaming adhesive for light shaving board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Preparation of component A:

[0039] Preparation of modified azodicarbonamide: Take azodicarbonamide (AC), zinc carbonate and urea in proportion, m(AC):m(ZnCO 3 ): m(CO(NH 2 ) 2 )=1:0.35:0.35, adding zinc carbonate and urea into azodicarbonamide respectively and stirring and mixing uniformly, the modified azodicarbonamide whose decomposition temperature is 140° C. is prepared; at normal temperature, according to the ratio, Add 55 parts of polyoxypropylene triol with a molecular weight of 600; 6 parts of adipic acid-based polyester diol into the reaction kettle and stir, stir and disperse for 1 hour, then add 2 parts of the above-mentioned modified azodicarbonamide, polyether Add 0.2 parts of modified silicone foam stabilizer, stir and disperse for 10 minutes, and then the product of component A can be obtained.

[0040] (2) Preparation of component B

[0041] The industrial commodity 1,4-butanediisocyanate can be directly packed.

[0042] After mixing component...

Embodiment 2

[0043] The preparation of embodiment 2 (1) A component:

[0044] Prepare modified azodicarbonamide: get azodicarbonamide (AC), zinc acetate and urea in proportion, m(AC):m(Zn(C 2 h 3 o 2 ) 2 ): m(CO(NH 2 ) 2 )=1:0.25:0.25, zinc acetate and urea were added to azodicarbonamide respectively and stirred and mixed evenly to prepare a modified azodicarbonamide whose decomposition temperature was 140°C; at normal temperature, according to the ratio, Add 80 parts of polyoxypropylene diol with a molecular weight of 1500; 25 parts of aromatic polyester diol into the reaction kettle and stir, stir and disperse for 2 hours, then add 5 parts of the above-mentioned modified azodicarbonamide, polyether modified 1 part of silicone foam stabilizer, stir and disperse for 30 minutes, and the product of component A can be obtained.

[0045] (2) Preparation of component B

[0046] The industrial commodity isocyanatomethyl-1,8-octane diisocyanate can be directly packed.

[0047] After mixin...

Embodiment 3

[0049] (1) Preparation of component A:

[0050] Preparation of modified azodicarbonamide: take azodicarbonamide (AC), zinc carbonate and citric acid in proportion, m(AC):m(ZnCO 3 ): m(C 6 h 8 o 7 )=1:0.25:0.25, adding zinc carbonate and citric acid into azodicarbonamide respectively and stirring and mixing uniformly, the modified azodicarbonamide whose decomposition temperature is 145° C. is prepared; at normal temperature, according to the ratio , add 60 parts of polyethylene oxide-propylene oxide copolyether triol with a molecular weight of 3000; 6-25 parts of polycaprolactone diol into the reaction kettle and stir, stir and disperse for 1.5 hours, and then add the above-mentioned modified azo 3 parts of dimethylamide, 0.7 parts of polyether-modified silicone foam stabilizer, stirring and dispersing for 20 minutes, the product of component A can be obtained.

[0051] (2) Preparation of component B

[0052] Just pack industrial commodity 1,5-naphthalene diisocyanate dire...

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Abstract

The invention provides a compound foaming adhesive for a light shaving board, which is characterized in that the adhesive comprises a component A and a component B. The component A comprises polyetherpolyol, polyester polyol, modified azodicarbonamide and a foam stabilizer. The component B is isocyanate. Compared with the traditional researched compound foaming adhesive, the foaming adhesive hasthe advantages that polyether polyol and polyester polyol of the component A, isocyanate of the component B and water in wood shavings react to form polyurethane foam, meanwhile, the modified azodicarbonamide of the component A is foamed and decomposed to generate gas so that flowability of foam systems is increased, gaps between the shavings are rapidly filled with the foam, the wood shavings arefirmly combined together by an adhesive foam system through gas generated by decomposition of the modified azodicarbonamide, good contact is formed among the wood shavings, and a uniform pore structure is formed in the shaving board, so that necessary bonding strength is guaranteed, and the light shaving board with high strength and low density is obtained.

Description

technical field [0001] The invention relates to the field of wood adhesives, in particular to a composite foaming adhesive for lightweight particle boards. Background technique [0002] Particleboard has occupied an important position in the field of modern furniture manufacturing and interior decoration with its low price, stable performance and many other advantages since its inception. In recent years, with the rapid development of my country's custom home furnishing industry, the market demand for particleboard has increased significantly. At present, the density of particleboard products for furniture produced and sold in my country is mostly 620-720kg / m 3 . Particleboards in this density range have relatively high costs during processing, transportation and use due to their high density. With the shortage of wood resources and the increasing demand for raw materials for wood-based panels, lightweight has gradually become a development trend. Replacing ordinary part...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J175/06C08G18/48C08G18/42C08J9/10C08G101/00
CPCC09J175/08C09J175/06C08G18/4825C08G18/4208C08G18/4837C08G18/4277C08G18/4854C08G18/4202C08G18/4018C08G18/4829C08G18/4816C08J9/103C08J2375/06C08J2375/08C08J2203/04C08G2101/00C08G2170/60
Inventor 王军锋黄腾华陈松武宋恋环雷福娟栾洁胡拉陈桂丹刘晓玲罗玉芬
Owner GUANGXI FORESTRY RES INST