A kind of high temperature resistant graphene anticorrosion coating composition
A technology of anti-corrosion coatings and graphene, which is applied in the direction of anti-corrosion coatings, fire-proof coatings, polyether coatings, etc., can solve the problems of poor comprehensive performance and complicated preparation process, achieve simple production process, simplify the preparation process, and improve temperature resistance Effect
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[0024] According to the present invention, the graphene dispersion liquid is self-made, and the preparation method preferably includes: adding the graphene obtained by the oxidation-reduction method into a solvent for ultrasonic dispersion, and adding a diisocyanate modifier and a catalyst. Incubate at 50°C for 12-72 hours, preferably 24-48 hours, wash with acetone and centrifuge. The solvent is preferably one of N,N-dimethylacetamide or N,N-dimethylformamide, and the diisocyanate modifier is preferably p-phenylene diisocyanate, toluene diisocyanate or Dimethyl biphenyl diisocyanate; Catalyst is preferably dibutyltin dilaurate or stannous oxalate; The mass ratio of described graphene and diisocyanate modifier is preferably 0.5:10; The quality of diisocyanate modifier (g): The volume (ml) of the catalyst is preferably 10:0.3; the graphene is produced by a redox method (refer to Patent No. CN104150471B, a method for reducing graphene oxide). The mass fraction of graphene in the...
Embodiment 1
[0035] Weigh 10g of polyaryletherketone resin (PEK-CN) with an intrinsic viscosity of 0.60dL / g, add 40g of DMAC solution, stir to dissolve the resin completely, add graphene dispersion (the mass fraction of graphene in the graphene dispersion is preferably 5%), the mass fraction of graphene in the composition is 0.5%, then add titanate coupling agent TMC-201 with mass fraction of 0.4%, silicone leveling agent BYK-333 with mass fraction of 0.3% and defoamer DF-830 with a mass fraction of 0.01%, and stirred at high speed for 30 minutes to make the solution evenly mixed to obtain the product coating composition.
[0036] The obtained coating composition was sprayed on a stainless steel substrate, and subjected to heat treatment at 80° C. for 2 h + 150° C. for 2 h to obtain a test piece for performance testing. The results are shown in Table 1.
Embodiment 2
[0038] Weigh 10g of polyaryletherketone resin (PEK-CN) with an intrinsic viscosity of 0.80dL / g, add 40g of DMAC solution, stir to dissolve the resin completely, add graphene dispersion (the mass fraction of graphene in the graphene dispersion is preferably 4%), the mass fraction of graphene in the composition is 0.5%, then add titanate coupling agent TMC-201 with a mass fraction of 0.4%, silicone leveling agent BYK-333 with a mass fraction of 0.3% and The defoamer DF-830 with a mass fraction of 0.01% was stirred at high speed for 30 minutes to mix the solution evenly to obtain the product coating composition.
[0039] The obtained coating composition was spray-coated on a stainless steel substrate, and subjected to heat treatment at 80°C for 2h+150°C for 2h+300°C for 2h to obtain a test piece for performance testing. The results are shown in Table 1.
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