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Monocomponent polyurethane foaming type adhesive

A technology of polyurethane and adhesives, which is applied in the direction of bonding methods using foaming adhesives, and can solve problems such as high vapor pressure and limited applications

Inactive Publication Date: 2010-03-24
SHANGHAI HAOHAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional one-component polyurethane adhesives generally use TDI (toluene diisocyanate), and the high vapor pressure and toxicity of TDI limit its application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] In a glass reaction flask equipped with stirring and a thermocouple, add 500 grams of Desmodur0129M (Bayer, Germany), 100 grams of polyether polyol GMN-3050 (Shanghai Gaoqiao Petrochemical), polyether polyol GE-204 (Shanghai Gaoqiao) Bridge petrochemical) 80 grams, dimorpholine diethyl ether 5.0 grams, phthalocyanine blue paste 6.0 grams. The chemical reaction is carried out by raising the temperature, the reaction temperature is 60° C., and the reaction time is 150 minutes to obtain a one-component polyurethane foam adhesive. After testing, the content of isocyanate groups is 20.0%, and the viscosity is 600mPa.s / 25°C. The adhesive dry time is 30 minutes, and the density after curing is 100kg / m 3 . Galvanized steel plate-cement bonding strength is greater than 5Mpa.

Embodiment 2

[0013] In a glass reaction flask equipped with stirring and thermocouple, add 250 grams of Desmodur0129M (Bayer Company of Germany), 250 grams of polymeric MDI 44V20 (Bayer Company of Germany), 900 grams of polyether polyol GE-220 (Shanghai Gaoqiao Petrochemical) , polyether polyol GE-204 (Shanghai Gaoqiao Petrochemical) 50 grams, dimorpholine diethyl ether 0.2 grams, chlorinated paraffin 52# ​​600 grams, antioxidant BHT 10 grams. The chemical reaction was carried out by raising the temperature, the reaction temperature was 90°C, and the reaction time was 60 minutes to obtain a one-component polyurethane foam adhesive. After testing, the isocyanate group content is 5%, and the viscosity is 8000mPa.s / 25°C. The surface drying time of the adhesive is 20 minutes, and the density of the adhesive after curing is 800kg / m 3 . The bonding strength of the wood board is greater than 6Mpa.

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Abstract

The invention provides a monocomponent polyurethane foaming type adhesive, which is prepared by adding, according to the finished product containing 5 to 20% of isocyanate group, polymerized MDI, MDI0129M, polyether polyalcohol, plasticizer, color paste and dimorpholinyl diethylether into a reaction kettle, heating and reacting at the temperature of 60 to 90 DEG C for 60 to 150 minutes. The adhesive has no organic solvent, after being solidified, the adhesive is formed into a micro foam layer with good mechanical strength.

Description

technical field [0001] The invention relates to a one-component polyurethane foam adhesive. technical background [0002] With the society's requirements for improved production efficiency and people's pursuit of lightweight materials, the traditional time-consuming and labor-intensive methods of combining materials such as nails or anchors are increasingly being replaced by adhesive bonding methods. Polyurethane adhesives, because of the active isocyanate groups on the molecular chain, have excellent adhesion to conventional materials such as wood, cement and metal, and have been widely used and developed in the building materials industry. Polyurethane adhesives are generally divided into two-component and one-component adhesives. Compared with two-component polyurethane adhesives, one-component polyurethane adhesives have obvious advantages in ease of use. Traditional one-component polyurethane adhesives generally use TDI (toluene diisocyanate), but the high vapor pressu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J5/08
Inventor 刘远中季新林徐强
Owner SHANGHAI HAOHAI CHEM
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