Polyurethane acrylate prepolymer and preparation method thereof as well as paint prepared by same
A technology of urethane acrylate and hydroxyethyl acrylate, which is applied in the field of urethane acrylate prepolymer and its preparation, can solve the problem of unsatisfactory gloss, elasticity, flexibility and adhesion level of wooden floors and difficult to achieve breakthroughs in the quality of wooden floors , unreasonable preparation process and other problems, to achieve the effect of excellent curing rate, superior curing rate and superior toughness
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Embodiment 1
[0016] Embodiment 1: A polyurethane acrylate prepolymer, the prepolymer includes 1000 parts by mass of hexamethylene diisocyanate, 3 parts of dibutyltin laurate, 500 parts of polyethylene glycol, and 2 parts of hydroquinone And 1150 parts of hydroxyethyl acrylate.
[0017] The preparation method of above-mentioned polyurethane acrylate prepolymer comprises the following steps;
[0018] a. In a 500ml four-necked flask equipped with a stirrer, a condenser and a thermometer, add 1000 hexamethylene diisocyanate (HDI) and 3 parts of the total amount of dibutyltin laurate (DBTDL), and use a small amount of compound organic Adjust the PH value to 5 with acid, pass in dry nitrogen for 5-10 minutes, and stir with an electric stirrer to make it evenly mixed to obtain product A;
[0019] b. Raise the temperature of product A to 40-50°C, slowly drop 500 parts of polyethylene glycol (PEG1000) with an average molecular weight of 1000 after dehydration treatment into the four-necked flask w...
Embodiment 2
[0022] Embodiment 2: a kind of polyurethane acrylate prepolymer, this prepolymer comprises 900 parts of hexamethylene diisocyanate, 5 parts of dibutyltin laurate, 500 parts of polyethylene glycol, 2 parts of hydroquinone by mass parts and 1300 parts of hydroxyethyl acrylate.
[0023] The preparation method of above-mentioned polyurethane acrylate prepolymer comprises the following steps;
[0024] a. In a 500ml four-necked flask equipped with a stirrer, a condenser and a thermometer, add 1000 hexamethylene diisocyanate (HDI) and 3 parts of the total amount of dibutyltin laurate (DBTDL), and use a small amount of compound organic Adjust the PH value to 5 with acid, pass in dry nitrogen for 5-10 minutes, and stir with an electric stirrer to make it evenly mixed to obtain product A;
[0025] b. Raise the temperature of product A to 40-50°C, slowly drop 500 parts of polyethylene glycol (PEG1000) with an average molecular weight of 1000 after dehydration treatment into the four-nec...
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