High-performance bi-component waterborne polyurethane woodenware finishing paint and preparation method therefor
A water-based polyurethane, two-component technology, applied in the field of coatings, to achieve low voc, excellent adhesion, and excellent film-forming effects
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Embodiment 1
[0017] 1. Put a specified amount of 50 parts by weight of water-based hydroxyl polymer dispersion in the paint kettle or pull tank, start the mixer, and slowly stir the emulsion at a speed not exceeding 300r / min.
[0018] 2. Slowly add the excess water after deducting the water required for pre-configured additives from the formula into the mixing container. The water required in production must be deionized water or distilled water, and unpurified tap water, well water, and river water are not allowed. Water and additives must be added dropwise or in a trickle, and a large amount of violent one-time addition is not allowed to avoid stratification and agglomeration. Stir for about 5-10 minutes after adding.
[0019] 3. Add the film-forming aid directly into the mixer, increase the speed to 500~800r / min after adding, and stir for 10~20min. Film-forming aids can be added alone or pre-mixed with 0.6 parts by weight of carboxymethyl cellulose, 2 parts by weight of calcium chlori...
Embodiment 2
[0025] 1. Put a specified amount of 65 parts by weight of water-based hydroxyl polymer dispersion in the paint kettle or pull tank, start the mixer, and slowly stir the emulsion at a speed not exceeding 300r / min.
[0026] 2. Slowly add the excess water after deducting the water required for pre-configured additives from the formula into the mixing container. Add water and additives by dripping or trickling, and do not add a large amount of violent one-time addition to avoid stratification and agglomeration. Stir for about 10 minutes after the addition.
[0027] 3. Add the film-forming aid directly into the mixer, increase the speed to 800r / min after adding, and stir for 10~20min. Film-forming aids can be added alone or pre-mixed with 1 weight part of carboxymethyl cellulose, 2.5 weight parts of calcium chloride, 1.5 weight parts of sodium benzoate, 4.5 weight parts of distilled water, 7 weight parts of matting pulp, 0.4 Parts by weight of defoamer, 1.5 parts by weight of lev...
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