Composite interpenetrating polymer network coating and preparation method thereof
A technology of interpenetrating polymers and coatings, used in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve the problems of short chemical resistance time, poor impact deformation resistance, etc., and achieve low environmental pollution and good corrosion resistance. Performance, high solids effect
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Embodiment 1
[0056] The preparation method of the composite interpenetrating polymer network coating is:
[0057] Preparation of component A:
[0058] 1) Synthesis of modified alkyd resin: the mass parts are 50 parts of castor oil, 8 parts of ethylene glycol, and 12 parts of pentaerythritol are metered into the reactor, and N 2 Gas, gradually and slowly raise the temperature to 100°C, then rapidly raise the temperature to 200°C and keep it for 1h, then cool down to 120°C, add 30 parts by mass of phthalic anhydride, and raise the temperature to 180°C, keep reflux for 1h, then drop to room temperature; Obtain modified alkyd resin;
[0059] 2) Preparation of interpenetrating network polymer coating: 35 parts of modified alkyd resin, 10 parts of melamine formaldehyde amino resin, 27.5 parts of bisphenol A epoxy resin, 10 parts of dibutyl phthalate (DBP), 15 parts Add active toughening agent B castor oil, 2.0 parts of KIPPRC-150 dehydrating agent and 0.5 parts of catalyst organotin compound K...
Embodiment 2
[0066] Preparation of component A:
[0067] 1) Synthesis of modified alkyd resin: the mass parts are 50 parts of castor oil, 8 parts of ethylene glycol, and 12 parts of pentaerythritol are metered into the reactor, and N 2 Gradually and slowly raise the temperature to 100°C, then rapidly raise the temperature to 220°C and keep it for 1.5h, then cool down to 120°C, add 30 parts by mass of phthalic anhydride, and raise the temperature to 200°C, keep reflux for 1.5h, then lower to room temperature ; Namely modified alkyd resin;
[0068] 2) Preparation of interpenetrating network polymer coating: 30 parts of modified alkyd resin, 10 parts of isobutyl etherified melamine formaldehyde amino resin, 40 parts of epoxy E-44 resin, 8.5 parts of diethyl phthalate (DEP), 10 parts of active toughening agent B castor oil, 1.0 parts of SIADD-620 dehydrating agent and 0.5 parts of catalyst organotin compound TIN-18 are added to the batching tank and stirred at 22±3°C and 800r / min 30min; the ...
Embodiment 3
[0074] Preparation of component A:
[0075] 1) Synthesis of modified alkyd resin: the mass parts are 50 parts of castor oil, 8 parts of ethylene glycol, and 12 parts of pentaerythritol are metered into the reactor, and N 2 Gas, gradually and slowly raise the temperature to 100°C, then rapidly raise the temperature to 250°C and keep it for 2h, then cool down to 120°C, add 30 parts by mass of phthalic anhydride, and raise the temperature to 220°C, keep reflux for 2h, and then lower to room temperature; Modified alkyd resin;
[0076] 2) Preparation of interpenetrating network polymer coating: 60 parts of modified alkyd resin, 5 parts of melamine formaldehyde amino resin, 20 parts of E-20 resin, 5 parts of dioctyl phthalate (DNOP), 9 parts of active Toughener B castor oil, 0.5 parts of K-200D dehydrating agent and 0.5 parts of organic tin compound TIN-22 catalyst are added to the batching tank, and stirred for 40 minutes at 22±3°C and 1000r / min; the paint after stirring is unifor...
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