Aqueous composition with homopolymer
A technology of water-based paint and composition, applied in the direction of coating, latex paint, etc., can solve problems such as coalescent adhesion
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Embodiment 1
[0073] Embodiment 1. Preparation of seed crystal latex
[0074] BA / n-DDM=100 / 2, (all ratios are weight ratios)
[0075] Add 1839.22 grams of deionized water, 0.63 grams of anhydrous sodium sulfate, 0.25 grams of acetic acid and 66.04 grams of a 28% solution of SLS in a 5-liter quadruplex equipped with a heating mantle, thermocouple, temperature controller, mechanical stirrer, and reflux condenser. necked round bottom flask. The reaction mixture was heated to 83 °C. Separately, an initiator solution was prepared by dissolving 4.82 grams of NaPS in 83.33 grams of deionized water. Using a mechanical mixer, an emulsified monomer mixture was prepared with 513.70 grams of deionized water, 22.01 grams of a 28% solution of SLS in water, 1225.00 grams of BA, and 25.00 grams of n-DDM. The reaction mixture was brought to 83°C and the NaPS solution was added all at once, followed by the emulsified monomer mixture (14.88 g / min) over a period of 2 hours. The temperature was maintained a...
Embodiment 2
[0076] Embodiment 2. The preparation of the first section latex
[0077] Seed / / Segment I = 10 / / 90
[0078] BA / n-DDM / / BA / VI / n-DDM=100 / 2 / / 70 / 30 / 2
[0079] 424.45 grams of deionized water and 507.95 grams of the seed crystal latex prepared in Example 1 were added to a 5-liter four-neck round bottom flask equipped with a heating mantle, thermocouple, temperature controller, mechanical stirrer and reflux condenser. The reaction mixture was heated to 85°C. Independently, by adding 27.50 g of Vazo TM Initiator solutions were prepared by mixing 68 and 215.86 grams of 1N NaOH with 789.05 grams of deionized water. Vazo TM68 The initiator solution was split in half. To half of this was added 412.50 grams of VI. An emulsified monomer mixture was prepared using a mechanical mixer with 589.29 grams of deionized water, 98.21 grams of a 28% solution of SLS in water, 962.50 grams of BA and 27.50 grams of n-DDM. The reaction was kept fixed at 85°C, and the emulsified monomer mixture ...
Embodiment 3
[0080] Embodiment 3. Preparation of two-stage latex
[0081] Seed / / Segment I / / Segment II=5 / / 45 / / 50
[0082] BA / n-DDM / / BA / VI / n-DDM / / BA / MMA / n-DDM
[0083] 100 / 2 / / 70 / 30 / 2 / / 50 / 50 / 2
[0084] 382.50 grams of the first-stage latex obtained in Example 2 were added to a 1-liter four-neck round bottom flask equipped with a heating mantle, thermocouple, temperature controller, mechanical stirrer and reflux condenser. The reaction mixture was heated to 85°C. By adding 3.00 grams of Vazo TM Initiator solutions were prepared separately by mixing 68 and 23.55 grams of 1N NaOH with 86.08 grams of deionized water. Vazo TM 68 The initiator solution was split in half. Using a mechanical mixer, an emulsified monomer mixture was prepared with 125.12 grams of deionized water, 5.36 grams of 28% SLS in water, 75 grams of BA, 75 grams of MMA, and 3.00 grams of n-DDM. Keeping the reaction stationary at 85°C, the emulsified monomer mixture (3.12 g / min) was mixed with the first half of Vazo over ...
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