A kind of antifouling leather finishing agent and preparation method thereof
A leather finishing agent and antifouling technology, applied in antifouling/underwater paints, coatings, paints containing biocides, etc., can solve the problems of high cost, high process requirements, lack of anti-fouling, etc., and achieve high cost performance , high crosslinking density, good antifouling effect
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[0031] Based on above-mentioned embodiment: also provide a kind of preparation method of antifouling leather finishing agent, comprise the following steps:
[0032] Step 1: performing bulk polymerization of acrylate monomers and / or vinyl monomers under the action of an initiator;
[0033] Step 2: After the hydroxyl value reaches 50-130mgKOH / g, stop the reaction and lower the temperature to less than 50°C;
[0034] Step 3: adding a photoactive acrylic reactive diluent for dilution to obtain a hydroxyl-containing acrylic resin;
[0035] Step 4: Cool down to room temperature, add amino resin, stir well, and add appropriate additives to obtain resin components;
[0036] Step 5: Just add catalyst components when using.
Embodiment 1
[0039] Weigh 120g of hydroxyethyl methacrylate, 650g of methyl methacrylate, 600g of butyl acrylate, 357g of isooctyl methacrylate, 17g of azobisisobutylcyanide, mix well, take out 1 / 4 into a 3L four-necked flask During the reaction, the temperature was raised to 75°C for 0.5h, and then the remaining monomer mixture was added dropwise within 2h, the reaction was stopped after the hydroxyl value reached 30mgKOH / g, the temperature was lowered to 45°C, 150g of trimethylolpropane diacrylate was added, and acrylic acid iso Bornyl ester 155g, the obtained solid content is 85%, the hydroxyl acrylic resin of viscosity 2500 cps / 25 ℃.
[0040] Take 200g of the above resin, add 50g of amino resin CYMEL 327, 3g of defoamer, 2.5g of leveling agent, 3.0g of catalyst p-toluenesulfonic acid, and disperse at a speed of 1500r / min for 10min with a disperser to obtain an antifouling leather finishing agent a.
Embodiment 2
[0042] Weigh 150g of hydroxyethyl methacrylate, 120g of ethyl acrylate, 100g of styrene, 129g of lauryl methacrylate, 5g of azobisisobutylcyanide, mix well, take out 1 / 4 in a 2L four-necked flask, and heat up to React at 75°C for 0.5h, then add the remaining monomer mixture dropwise within 2h, stop the reaction after the hydroxyl value reaches 130mgKOH / g, cool down to 45°C, add 100g of N,N-dimethylacrylamide, polyoxyethylene glycol 168 g of diacrylate, to obtain a hydroxyacrylic resin with a solid content of 65% and a viscosity of 1050 cps / 25°C.
[0043] Take 200g of the above resin, add 50g of amino resin CYMEL 325, 5g of defoamer, 3g of leveling agent, and 5g of p-toluenesulfonic acid, and disperse at a speed of 1500r / min for 10min with a disperser to obtain antifouling leather finishing agent B.
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Abstract
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