Acrylic acid-based finishing varnish composition, varnish and application of varnish
A technology of varnish and hydroxyacrylic acid, which is applied in the direction of polycarbonate coatings, coatings, anti-corrosion coatings, etc., can solve the problems of reducing acid resistance, and achieve excellent acid resistance, good mechanical properties, and environmental friendliness
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[0107] Add the following solvents: 800 parts of butyl acetate and 400 parts of propylene glycol methyl ether acetate into a reaction vessel equipped with a stirrer, a thermometer, a nitrogen conduit, and a reflux condenser;
[0108] Raise the reaction system to 130-140°C;
[0109] When the reaction temperature is stable, premix the following monomers: 425 parts of isobornyl methacrylate, 300 parts of styrene, 1750 parts of n-butyl acrylate, 1750 parts of hydroxyethyl methacrylate, 50 parts of acrylic acid, 950 parts of methyl methacrylate were gradually added to the reaction vessel at a uniform speed through a pump. During the process, the reaction temperature was maintained between 130-140°C and the rate was controlled to ensure that the reaction mixture was added dropwise within 2-4 hours;
[0110] At the same time, the following initiator mixtures, specifically: 200 parts of 2-ethylhexanoate tert-butyl peroxide Kayaester O (Akzo Nobel), 159 parts of di-tert-amyl peroxide Luperox D...
Embodiment 1
[0117] The formula of the varnish paint is shown in Table 1 below. The preparation method includes the following steps:
[0118] 1) Sequentially add ethylene glycol butyl ether acetate to the main tank a, mix dibasic acid dibasic ester (DBE), 3-ethoxy ethyl propionate (EEP) and butyl acetate, at 200-400rpm Stir for 10 minutes at speed;
[0119] 2) At 300-500rpm, add TINUVIN 292, TINUVIN 384-2, BYK358N and BYK 310 to the main tank a in sequence, and continue stirring for 30 minutes after the addition is complete;
[0120] 3) Add n-butanol to auxiliary vat b, then add AAC 2500 under constant stirring at 200-400 rpm, and continue to stir for 15 minutes; then stir the resulting mixture in auxiliary vat b at 300-500 rpm in main vat a Add to the main tank a under the state of, and continue to stir for 20 minutes after the addition is complete;
[0121] 4) At the speed of 300-500rpm, add blocked isocyanate B and acrylic resin A to the main tank a in sequence, and continue to stir for 20 mi...
Embodiment 2
[0130] The preparation method is the same as that in Example 1, except that the acrylic resin A in step 4) is replaced by ETERAC7393-S-80, and the blocked isocyanate B is replaced by Desmodur BL 3175A.
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