A kind of preparation method of alkyd resin emulsion
An alkyd resin emulsion and acid anhydride technology, used in coatings, polyester coatings, etc., can solve problems such as performance improvement obstacles, difficulty in obtaining small particle size resin emulsions, etc., and achieve excellent water resistance and salt spray resistance. low diameter effect
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[0034] Preparation of modified epoxy emulsifier:
[0035] Add 100kg of epoxy resin E20, 20kg of stearic acid, and triphenylphosphine into the reaction kettle, react at 120°C for 5h, and when the acid value is lower than 2mg KOH / g, add 19.5kg of meglumine, 0.1kg of dimethylethanolamine, 120 ℃ of reaction for 5h, cooling, discharging for standby, cooling, to obtain the modified epoxy emulsifier.
Embodiment 1
[0041] The preparation method of a kind of alkyd resin emulsion of the present invention comprises the following steps:
[0042] 1) Synthesis of alkyd resin: add 50kg of unsaturated fatty acid linoleic acid, 10kg of trimethylolpropane, 5kg of maleic anhydride, and 0.2kg of organic tin catalyst into the reaction kettle, heat up to 180°C for reaction for 2h, and then heat up to 200°C for reaction For 2 hours, the temperature was finally raised to 230 °C for reaction for 2 hours. When the acid value was lower than 50 mg KOH / g, the temperature was lowered to 120 °C, and 10 kg of vinyl silicone oil with a viscosity of 100 cps and 0.1 kg of oily initiator BPO were added, and the reaction was carried out for 4 hours;
[0043] 2) preparation of alkyd resin emulsion: after the above-mentioned reaction is completed, the system temperature is lowered to 80 ° C, 2 kg of synthetic modified epoxy emulsifiers, 1 kg of cucurbituril are added, and the stirring is continued for 30 min. When cool...
Embodiment 2
[0045] The preparation method of a kind of alkyd resin emulsion of the present invention comprises the following steps:
[0046] 1) Synthesis of alkyd resin: add 50kg of unsaturated fatty acid linoleic acid, 10kg of trimethylolpropane, 5kg of maleic anhydride, and 0.2kg of organic tin catalyst into the reaction kettle, heat up to 180°C for reaction for 2h, and then heat up to 200°C for reaction 2h, the temperature was finally raised to 230°C for 2h, and the temperature was lowered to 120°C when the acid value was lower than 50mg KOH / g;
[0047]2) preparation of alkyd resin emulsion: after above-mentioned reaction is completed, system temperature is lowered to 80 ℃, adds modified epoxy emulsifier 2kg, cucurbituril 1kg, continues stirring 30min, when cooling to below 60 ℃, adds ammoniacal liquor 1kg, 20kg of water, dispersed for 30min, and discharged.
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