Water-based latex and dispersion of inorganic pigment particles comprising the water-based latex
A technology of water-based latex and polymer particles, which is applied in the treatment of pigment paste, fibrous fillers, dyed polymer organic compounds, etc., and can solve environmental problems, small molecule leakage and other problems
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[0059] In the preparation of the aqueous latex of the present invention, one or more of the abovementioned ethylenically unsaturated monomers i) can be used. The above-mentioned ethylenically unsaturated monomer i) may be formed by any suitable preparation method using any suitable reactants. Preferably, the ethylenically unsaturated monomer i) is formed by reacting an ethylenically unsaturated group-functionalized polyether with an anchor-functional group-introducing reagent. The anchor functional group introducing reagent is used to introduce the anchor functional group itself or the anchor functional group precursor into the ethylenically unsaturated monomer i). In the case of anchor functional group introduction reagents for the introduction of anchor functional group precursors, the preparation of the ethylenically unsaturated monomer i) also includes the further treatment of the ethylenically unsaturated group functionalized polyether with the anchor functional group int...
Embodiment 1
[0131] Example 1: Synthesis of Ethylenically Unsaturated Monomers Comprising Anchoring Functional Groups and Poly(ethylene oxide)-Containing Segments (Hereafter Functional Monomers)
[0132] functional monomer 1
[0133] Under nitrogen protection, allyl polyoxyethylene ether and phosphorus pentoxide with a molar ratio of 1:1.2, and 500 ppm of polymerization inhibitors were added at room temperature to a device equipped with a thermometer, top stirrer, gas inlet and condenser in a four-neck flask and homogenize it. The reaction mixture was reacted at 65°C for 5 hours. Then a certain amount of water was added, and the reaction was continued at 65° C. for 1 hour. Finally, it was neutralized with sodium hydroxide at 25° C. to obtain functional monomer 1 .
[0134] functional monomer 2
[0135] The synthesis of functional monomer 2 is similar to the synthesis of functional monomer 1 above, except that acrylic polyethylene glycol monoester is used instead of allyl polyoxyethylen...
Embodiment 2
[0140] Embodiment 2: the synthesis of aqueous latex
[0141] 25g of each functional monomer, 500g of styrene, 45g of butyl acrylate, and 5g of acrylic acid were weighed and mixed uniformly to form a monomer mixture. Weigh 6g of sodium dodecylsulfonate (SDS) and 3g of octylphenol polyoxyethylene ether (OP-10) and dissolve them in 250g of water, then mix and stir the monomer mixture with water to form a pre-emulsion. Add 350g of deionized water, 1g of SDS, 0.5g of OP-10, 0.2g of ammonium persulfate into the reaction flask, stir evenly and raise the temperature to 80°C. After reaching the predetermined temperature, add the pre-emulsion dropwise within 2 hours. After the dropwise addition was complete, the reaction mixture was maintained at 80°C for an additional 1.5 hours. Finally, cool and adjust the pH range of the emulsion to 7.0-8.5. After testing, the polymer particles of the aqueous latex formed by the monomer mixture containing functional monomer 1 or 2 have a glass tra...
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Abstract
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