A kind of exfoliating montmorillonite loaded organic amine curing agent and its preparation method and application
A montmorillonite and curing agent technology, applied in the field of coatings, can solve the problems of coating rheological properties, metal wettability, curing shrinkage rate, brittle deterioration of paint film, phase separation and delamination, poor compatibility, etc., to improve corrosion protection. Effectiveness, reduced water absorption, excellent compatibility
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[0027] To verify the preparation of coatings:
[0028] In order to test the use effect of the curing agent, the present invention is equipped with an epoxy coating for verification. After mixing the epoxy resin and solvent evenly at a high speed in a clean container, it is then treated with a coating grinding equipment for 10 to 30 minutes, and then passed through a sieve. The component A of the paint can be obtained after filtering through the net, and then poured into the tank for storage. Component B is respectively the exfoliation-type montmorillonite-loaded organic amine curing agent and the corresponding organic amine curing agent required by the present invention.
[0029] Paint application and verification coating preparation:
[0030] Mix components A and B of the verification paint evenly to prepare the paint to be painted. The paint coating process includes the following steps: ①Sandblasting or sanding the metal substrate to remove the surface of the metal substrat...
Embodiment 1
[0033] The first step is that 100 grams of cation exchange capacity (CEC) is the montmorillonite of 80 (meq / 100g) and adds 10000 grams of deionized water at room temperature and stirs for 24 hours to prepare montmorillonite dispersion liquid, simultaneously 180 grams of glycine and equimolar A large amount of 0.01mol / L hydrochloric acid was reacted to prepare a quaternary ammonium salt, then the quaternary ammonium salt was added to the montmorillonite dispersion and reacted at 80°C for 24 hours to prepare an organic montmorillonite with a carboxyl functional group, and the reaction product was washed repeatedly with distilled water, and Centrifuge or filter, and wash until the silver nitrate solution detects that no chloride ions are present. The product is dried, pulverized and stored in a desiccator. In the second step, organic montmorillonite with carboxyl functional groups, 1 gram of triethylamine as a catalyst, and 200 grams of diethylenetriamine were reacted at 240° C. ...
Embodiment 2
[0036] The first step is that 100 grams of cation exchange capacity (CEC) is the montmorillonite of 160 (meq / 100g) and adds 500 grams of N, in N-dimethylformamide, stirs 0.5 hour at 120 ℃ to prepare montmorillonite dispersion liquid, simultaneously 2 grams of aminoacetic acid was reacted with 1mol / L hydrochloric acid in an equimolar amount to prepare a quaternary ammonium salt, and then the quaternary ammonium salt was added to the montmorillonite dispersion and reacted at 100°C for 24 hours to prepare an organic montmorillonite with carboxyl functional groups. The product is repeatedly washed with N,N-dimethylformamide, centrifuged or filtered, and washed until the silver nitrate solution detects that no chloride ions are present. The product is dried, pulverized and stored in a desiccator. In the second step, the combination of organic montmorillonite with carboxyl functional group, 2 grams of dicyclohexylcarbodiimide, and 1 gram of 1-hydroxybenzotriazole is used as a cataly...
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