Waterborne alkyd resin emulsion for interior wall water-based paint and preparation method thereof
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A technology of water-based alkyd resin and water-based paint, applied in the field of coatings
Active Publication Date: 2017-06-20
HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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At present, there is no high water resistance alkyd r
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Embodiment 1
[0045] The preparation of embodiment 1 nonionic emulsifier of the present invention
[0046] Sunflower oil (1750 g), 350 g of YMER™ N-120 (0.350 mol), 725 g of PE (0.140 mol), 3.75 g of MBTO and 3.75 g of DBTO were placed in a 5-liter, 3-neck round bottom flask equipped with Heated packed condenser set at 95°C, mechanical stirrer, thermocouple and nitrogen inlet. The reaction mixture was heated at 210 °C for 8 hours and then cooled to room temperature. Phthalic anhydride (600 grams, 4.05 moles), 400 grams of isophthalic acid (2.41 moles) and 50 milliliters of xylene were added. The condenser was replaced by a Dean Stark trap with a Friedrichs condenser on top and the reaction mixture was heated at 220°C. The reaction was allowed to proceed until the acid number reached about 11.0. The degree of branching of the emulsifier was 84%.
Embodiment 5
[0052] Embodiment 5 Preparation of emulsion 1 of the present invention
[0056] (1) Add oleic acid, neopentyl glycol, trimethylolpropane and adipic acid into the reaction kettle, and cover the pot;
[0057] (2) After raising the temperature of the reactor to 130-140°C within 1-1.5h, start stirring, and feed CO2 and condensed water at the same time;
[0058] (3) Raise the temperature of the reactor to 178-182°C within 0.8-1.2h, and perform esterification at this temperature for 0.8-1.2h;
[0059] (4) After the esterification reaction is completed, raise the temperature of the reactor to 215-220°C within 0.8-1.2 hours, and then keep the esterification until the reactants are completely transparent;
[0060] (5) When the reactant in step (4) is completely tr...
Embodiment 6-8
[0065] The preparation of embodiment 6-8 emulsion of the present invention
[0066] Emulsions 2-4 of the present invention were prepared in the same manner as in Example 5, except that the emulsifier 1 in Example 5 was replaced with the emulsifiers in Examples 2-4, respectively.
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Abstract
The invention provides waterborne alkyd resin emulsion for interior wall water-based paint and a preparation method thereof. The method comprises the following steps: carrying out esterification reaction on 30 weight percent to 60 weight percent of unsaturated fatty acid, 5 weight percent to 10 weight percent of polyatomic alcohol, 10 weight percent to 15 weight percent of trimethylol propane and 15 weight percent to 20 weight percent of binary acid until the acid value is reduced to be less than or equal to 10mgKOH/g; adding trimellitic anhydride at 175 DEG C to 180 DEG C until the acid value is 60mgKOH/g to 75mgKOH/g; adding dimethylethanolamine, an emulsifier and water at 80 DEG C to 90 DEG C and mixing, wherein the emulsifier is an anion emulsifier and/or a non-ionic emulsifier and the branching degree of the emulsifier is 50 percent to 90 percent or lower. The waterborne alkyd resin emulsion for the interior wall water-based paint, provided by the invention, has excellent stability; meanwhile, a film of the paint prepared from the waterborne alkyd resin emulsion has excellent water resistance.
Description
technical field [0001] The invention generally relates to the field of coatings, in particular to a water-based alkyd resin emulsion for interior wall water paints with excellent water resistance and a preparation method thereof. Background technique [0002] The current alkyd resin is still mainly solvent-based, but with the economic development and environmental protection requirements, it has become a development trend to make alkyd resin water-based. [0003] Water-based alkyd resins are currently mainly used in industrial water-based paints, which focus on the anti-corrosion and anti-rust properties of water-based paints. Different from industrial water paint, interior wall water paint pays more attention to environmental protection, water resistance, scrub resistance and other properties. Therefore, the requirements for water-based alkyd resins as binders are higher. At present, there is no high water resistance alkyd resin emulsion specially applied to interior wall...
Claims
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