Brush-making structural adhesive and preparation method thereof
A structural adhesive, the technology of Group A, applied in chemical instruments and methods, preparation of organic compounds, preparation of aminohydroxy compounds, etc., can solve the problems of high strength and toxicity of the cured products of brush-making structural adhesives, and achieve the goal of eliminating human harm, The effect of reducing damage
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Embodiment 1
[0061] Step 1: Put a certain amount of phenol in the reaction flask, add diethylenetriamine at a molar ratio of 1:2.0 to 2.5, raise the temperature to 40-50°C, start stirring, and add formaldehyde with a molar ratio of 1:2 to phenol dropwise, Control the temperature rise rate, no more than 80°C, reflux reaction for 0.5-1h, raise the temperature to 110-120°C, dehydrate and reflux reaction for 2-4 hours, until no water flows out of the receiver, cool down to 80°C, add the equivalent of the total dosage 20% amine value is 220mg·g -1 Dimer acid polyamide curing agent, stirred for 0.5 hours, filtered to obtain an amber low-viscosity liquid, which was used as component B of brush-making structural adhesive.
[0062] Step 2: Put a certain amount of soybean oil dimer acid in the reaction bottle, add butanediol glycidyl ether at a molar ratio of 1:2.5~3, raise the temperature to 120°C~140°C, start stirring, and add the equivalent amount of soybean oil Dimer acid mass 0.2% liquid N, N-...
Embodiment 2
[0066] Step 1: Put a certain amount of phenol in the reaction flask, add triethylenetetramine at a molar ratio of 1:2.0~2.5, raise the temperature to 40~50°C, start stirring, and dropwise add acetaldehyde with a molar ratio of 1:2 to phenol , control the heating rate, not exceeding 80°C, reflux for 0.5-1h, heat up to 110-120°C, dehydrate and reflux for 2-4 hours, until no water flows out of the receiver, cool down to 80°C, add the equivalent reactant The amine value of 20% of the total dosage is 220mg·g -1 Cottonseed oil dimer acid polyamide curing agent, stirred for 0.5 hours, filtered to obtain an amber low-viscosity liquid, which was used as component B of brush-making structural adhesive.
[0067] Step 2: Put a certain amount of cottonseed oil dimer acid in the reaction bottle, add neopentyl glycol glycidyl ether at a molar ratio of 1:2.5~3, raise the temperature to 120°C~140°C, start stirring, and add the equivalent amount of cottonseed Oil dimer acid mass 0.2% liquid N,...
Embodiment 3
[0071] Step 1: Put a certain amount of phenol in the reaction flask, add tetraethylenepentamine at a molar ratio of 1:2.0~2.5, raise the temperature to 40~50°C, start stirring, and add propionaldehyde in a molar ratio of 1:2 to phenol , control the heating rate not to exceed 80°C, reflux reaction for 0.5~1h, heat up to 110~120°C, dehydrate and reflux for 2~4 hours, until no water flows out of the receiver, cool down to 80°C, add the equivalent of the total dosage 20% amine value is 220mg·g -1 Tung oil dimer acid polyamide curing agent, stirred for 0.5 hours, filtered to obtain an amber low-viscosity liquid, which was used as component B of brush-making structural adhesive.
[0072] Step 2: Put a certain amount of tung oil dimer acid in the reaction bottle, add diethylene glycol glycidyl ether in a molar ratio of 1:2.5~3, raise the temperature to 120°C~140°C, start stirring, and add equivalent to tung oil dimer acid Acid quality 0.2% liquid N,N-dimethylaniline catalyst, closed...
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