Waterborne polyurethane resin as well as preparation method and application thereof
A water-based polyurethane and resin technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as poor stone chip resistance, achieve excellent stone chip resistance, reduce VOC, and reduce environmental impact
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Example Embodiment
[0032] Example 1:
[0033] A water-based polyurethane resin, comprising the following raw materials in parts by weight:
[0034] Polycarbonate diol: 20 parts;
[0035] Dimethylolbutyric acid: 5 parts;
[0036] Isophorone diisocyanate: 20 parts;
[0037] Pentaerythritol: 4 parts;
[0038] 1. 2-Propanediol: 5 parts;
[0039] Tin dilaurate: 1 part;
[0040] Triethylamine: 4 parts.
[0041] Its preparation method comprises the following steps:
[0042] (1) under nitrogen protection, add 20 parts of polycarbonate diol, 5 parts of dimethylol butyric acid, 20 parts of isophorone diisocyanate, 1 part of tin dilaurate into the reactor, and be warming up to 80 ℃, the reaction is 2h;
[0043] (2) add 4 parts of pentaerythritol, further react for 2h, then add 5 parts of 1.2-propanediol, stir and react for 1h, cool down, add 4 parts of triethylamine to carry out neutralization reaction;
[0044] (3) Add 112 parts of deionized water under high shear conditions, and stir for 2 hours...
Example Embodiment
[0045] Example 2:
[0046] A water-based polyurethane resin, comprising the following raw materials in parts by weight:
[0047] Polyester diol: 25 parts;
[0048] Sodium 1,4-dihydroxy-2-butanesulfonate: 3 parts;
[0049] Diphenylmethane diisocyanate: 15 parts;
[0050] Hexamethylene diisocyanate: 5 parts;
[0051] Trimethylolpropane: 3 parts;
[0052] Palm oil: 6 parts;
[0053] 1,4-Butanediol: 6 parts;
[0054] Bismuth laurate: 1.5 parts;
[0055] N,N`-dimethylethanolamine: 6 parts.
[0056] Its preparation method comprises the following steps:
[0057] (1) Under nitrogen protection, mix 25 parts of polyester diol, 3 parts of sodium 1,4-dihydroxy-2-butane sulfonate, 15 parts of diphenylmethane diisocyanate, 5 parts of hexamethylene diisocyanate , 1.5 parts of bismuth laurate was added to the reactor, the temperature was raised to 90°C, and the reaction was carried out for 3h;
[0058] (2) Add 3 parts of trimethylolpropane and 6 parts of palm oil, further react for ...
Example Embodiment
[0060] Example 3:
[0061] A water-based polyurethane resin, comprising the following raw materials in parts by weight:
[0062] Polyether glycol: 30 parts;
[0063] Sodium 1,4-dihydroxy-2-butanesulfonate: 2 parts;
[0064] Cyclohexane dimethylene diisocyanate: 25 parts;
[0065] Trimethylolpropane: 2 parts;
[0066] Palm oil: 5 parts;
[0067] Hexanediamine: 3 parts;
[0068] Stannous chloride: 1.2 parts;
[0069] N,N`-diisopropylethylamine: 6 parts.
[0070] Its preparation method comprises the following steps:
[0071] (1) Under nitrogen protection, 30 parts of polyether glycol, 2 parts of sodium 1,4-dihydroxy-2-butane sulfonate, 25 parts of cyclohexane dimethylene diisocyanate, 1.2 parts of chloride Tin was added to the reactor, the temperature was raised to 75°C, and the reaction was carried out for 4h;
[0072] (2) Add 2 parts of trimethylolpropane and 5 parts of palm oil, further react for 2h, then add 3 parts of hexamethylenediamine, stir and react for 2h, coo...
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