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Low whitening alpha-cyanoacrylate adhesive

A cyanoacrylate and adhesive technology, which is applied in adhesives, non-polymer organic compound adhesives, non-polymer adhesive additives, etc., can solve problems affecting the scope of use, and achieve the effect of reducing whitening

Inactive Publication Date: 2011-02-09
TONSAN ADHESIVES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this glue has greatly affected its scope of use due to its restrictions on the bonding parts.

Method used

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  • Low whitening alpha-cyanoacrylate adhesive
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Alpha-cyanoacrylate selects alpha-cyanoacrylate ethyl ester, calixarene selects 4-p-tert-butylcalix[8]arene octaethyl acetate, anionic polymerization inhibitor selects p-toluenesulfonic acid, free radical polymerization inhibitor Use hydroquinone. Put ethyl alpha-cyanoacrylate into a three-necked flask, and add 4-p-tert-butylcalix[8]arene 8, which accounts for 2% of the weight of ethyl alpha-cyanoacrylate, to ethyl alpha-cyanoacrylate. The low-whitening α-cyanoacrylate adhesive can be prepared by mixing octaethyl acetate, 200ppm p-toluenesulfonic acid and 1000ppm hydroquinone evenly at room temperature.

[0017] The curing speed, 24h shear strength and whitening data measured by Example 1 are shown in the following table:

[0018] Test 1: 2% 4-tert-butylcalix[4]arene-tetraethyl acetate

[0019] Test 2; without 4-tert-butylcalix[4]arene-tetraethyl acetate

[0020] Test 3: 7% 4-tert-butylcalix[4]arene-tetraethyl acetate

[0021]

Embodiment 2

[0023] α-cyanoacrylate is selected from α-cyanoacrylate, calixarene is selected from 4-tert-butyl calix[4]arene-tetraethyl acetate, anionic polymerization inhibitor is selected from methanesulfonic acid, and free radical polymerization inhibitor is selected from paracetamol. Methoxyphenol. Put α-cyanopropyl acrylate into a three-necked flask, and add [4] aromatic hydrocarbon-tetraethyl acetate, 150 ppm methyl ethyl acetate, 0.7% by weight of α-cyano ethyl acrylate to α-cyano propyl acrylate. Sulfuric acid and 800ppm of p-methoxyphenol can be made into low-whitening α-cyanoacrylate adhesive by stirring evenly at room temperature.

[0024] The curing speed, 24h shear strength and whitening data measured by Example 2 are shown in the following table:

[0025] Test 1: 0.7% 4-p-tert-butylcalix[8]arene octaethyl acetate

[0026] Test 2; without 4-p-tert-butylcalix[8]arene octaethyl acetate

[0027] Test 3: 0.1% 4-p-tert-butylcalix[8]arene octaethyl acetate

[0028]

[...

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PUM

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Abstract

The invention discloses a low whitening alpha-cyanoacrylate adhesive, which comprises the components of alpha-cyanoacrylate, calixarene, an anion polymerization inhibitor and a radical polymerization inhibitor, wherein the content of the calixarene accounts for 0.5-3% of the mass of the alpha-cyanoacrylate, the content of the anion polymerization inhibitor accounts for 50-250ppm of the mass of the alpha-cyanoacrylate, and the content of the radical polymerization inhibitor accounts for 100-2000ppm of the mass of the alpha-cyanoacrylate. The low whitening alpha-cyanoacrylate adhesive without loss of curing speed and bonding strength can be prepared by mixing and stirring the alpha-cyanoacrylate, the calixarene, the anion polymerization inhibitor and the radical polymerization inhibitor in a three-neck flask at normal temperature.

Description

technical field [0001] The invention relates to the field of an alpha-cyanoacrylate adhesive, in particular to a low-whitening alpha-cyanoacrylate adhesive. Background technique [0002] Since its discovery in 1955, alpha-cyanoacrylate glue has been able to bond almost all materials except inert materials such as polyethylene in a very short time due to its rapid polymerization and curing in the presence of trace amounts of water. , so it is widely used. However, due to its high vapor pressure, a white film is formed on the surface of the substrate, also known as whitening. This whitening phenomenon seriously affects the aesthetics of the bonding surface and limits the application range of α-cyanoacrylate adhesives to a large extent. [0003] At present, when α-cyanoacrylate adhesive is used, the methods for reducing whitening mainly include the following: 1. Selecting cyanoacrylate alkoxyester adhesives with low vapor pressure can indeed reduce whitening. Due to its high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/04C09J11/06
Inventor 刘洁李印柏林新松翟海潮王兵
Owner TONSAN ADHESIVES INC
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