Humidity-heat resistant cyanacrylate adhesive

A technology of cyanoacrylate and polymerization inhibitor, which is used in adhesives, polymer adhesive additives, non-polymer organic compound adhesives, etc., can solve the problems of poor heat and water resistance, limitations and other issues

Inactive Publication Date: 2014-02-05
TONSAN ADHESIVES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Cyanoacrylate adhesives are a unique type of monomer-type fast-curing adhesives. Since they were introduced by Eastman in 1958, they have been widely used because of their many advantages, such as one-component, rapid curing at room temperature, bonding Wide range of materials, low viscosity, thin adhesive layer, and the adhesive film has transparency, oil resistance and electrical insulation. However, the adhesive formed after curing is linear and easily hydrolyzed, resulting in poor heat and water resistance, which limits its use. wider application

Method used

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  • Humidity-heat resistant cyanacrylate adhesive
  • Humidity-heat resistant cyanacrylate adhesive
  • Humidity-heat resistant cyanacrylate adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add 0.1% free radical stabilizer hydroquinone, 0.05% anion stabilizer p-toluenesulfonic acid, and 0.5% accelerator dimethylsila-11-crown-4 to ethyl cyanoacrylate , 10% polymethyl methacrylate (PMMA), polyvinyl acetate (PVAC), vinyl acrylate rubber (AEM), nitrile rubber (NBR), acrylonitrile-butadiene-styrene copolymer ( ABS), acrylonitrile-styrene-acrylic rubber copolymer (ASA), stirred at 55-65°C for 1-2h to obtain glue. Test the positioning time of the glue on the nitrile rubber, and test the shear strength of the glue bonded carbon steel sheet according to the GB / T7124-2008 method. ℃, 90%RH in these two environments, test the shear strength of aging for 168h, so as to evaluate the moisture and heat resistance of the glue. The results are shown in the following table, where the percentage in the damp heat aging data is the relative 24h shear strength retention rate, and sample No. 1 is the blank sample:

[0030]

[0031] Compared with linear polymers PMMA and PVAC...

Embodiment 2

[0032] Add 0.1% free radical stabilizer hydroquinone, 0.05% anion stabilizer p-toluenesulfonic acid, and 0.5% accelerator dimethylsila-11-crown-4 to ethyl cyanoacrylate , different contents of ABS and ASA, and investigate the storage period of the prepared glue solution at 55°C (the maximum number of days for the glue solution not to thicken or solidify significantly) and the appearance change. Sample No. 8 is a blank sample.

[0033]

[0034] Compared with ABS, the addition of ASA can effectively improve the stability of ethyl α-cyanoacrylate, and the ideal addition amount is 10%.

[0035] Embodiment two:

[0036] Add 10% ASA or PMMA, 0.1% free radical stabilizer hydroquinone, 0.05% anion stabilizer p-toluenesulfonic acid, 0.5% anion stabilizer to methyl cyanoacrylate and ethyl cyanoacrylate respectively. % accelerator dimethylsila-11-crown-4. According to the method of GB / T 2791-1995, the peel strength of the aluminum sheet bonded by the glue is tested. Sample Nos. 15...

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PUM

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Abstract

The invention discloses a cyanacrylate composition. The cyanacrylate composition comprises: (1) 50-98% of cyanacrylate monomer; (2) 0.001-10% of anionic polymerization inhibitor; (3) 0.01-5% of radical polymerization inhibitor; (4) 1-30% of thickener; and (5) 0.1-10% of promoter. The acrylonitrile-styrene-acrylic ester copolymer (ASA) is used as a thickener and flexibilizer for the cyanacrylate adhesive disclosed by the invention; the copolymer can be used for effectively improving the heat resistance and the humidity resistance of the adhesive; as the adhesive does not contain the group capable of inhibiting the curing of the adhesive solution, the curing speed of the adhesive is not influenced; and in addition, as the ASA has excellent aging resistance, the aging resistance of the adhesive is also improved to some extent.

Description

technical field [0001] The present invention relates to a cyanoacrylate-containing composition, in particular to a cyanoacrylate adhesive used under hot and humid conditions. Background technique [0002] Cyanoacrylate adhesives are a unique type of monomer-type fast-curing adhesives. Since they were introduced by Eastman in 1958, they have been widely used because of their many advantages, such as one-component, rapid curing at room temperature, bonding Wide range of materials, low viscosity, thin adhesive layer, and the adhesive film has transparency, oil resistance and electrical insulation. However, the adhesive formed after curing is linear and easily hydrolyzed, resulting in poor heat and water resistance, which limits its use. wider application. [0003] Many studies at home and abroad use the method of adding carboxylic acid or anhydride to improve the heat and humidity resistance of cyanoacrylate adhesives. On the one hand, carboxylic acids and anhydrides can produ...

Claims

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Application Information

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IPC IPC(8): C09J4/04C09J11/08
Inventor 聂聪王兵林新松李印柏翟海潮
Owner TONSAN ADHESIVES INC
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