38results about How to "Improve water whitening resistance" patented technology

The invention provides a lotus-leaf-like self-cleaning finishing varnish and a preparation method thereof. The finishing varnish comprises a waterborne emulsion, a SiO2 / TiO2 nano-composite and / or a titania micron-nano-material, an antifoaming agent, a film forming aid, a thickening agent, deionized water, and an optional wetting agent, fungicide and / or mold inhibitor. In the preparation method, the SiO2 / TiO2 nano-composite and the coarse titania micron-nano-material are added into the waterborne finishing varnish, and thus the water resistance and water whiteness resistance of the finishing varnish are improved; meanwhile, a film is endowed with super-hydrophobicity and the property of decomposing organic matter. The finishing varnish is transparent in appearance, simple in production process and good in workability, meets environmental indexes and can be produced in batches.

The invention discloses a synthetic method of a transparent water-whitening resistant polyacrylate emulsion. The synthetic method is as follows: uniformly mixing an emulsifier, a soft monomer, a hard monomer and a functional monomer to obtain a monomer mixed liquor containing the emulsifier; adding deionized water in a reactor, heating to a preset temperature, adding 30wt%-50wt% of an initiator, stirring for 5min, dropping the monomer mixed liquor, dropping for 2-5h; after the monomer mixed liquor is added for 30min, dropping the rest of the initiator, dropping for 2-5h, controlling the reaction temperature to be 70-90 DEG C, keeping warm for 0.5-1 h; cooling to 60 DEG C, adding tert-butyl hydroperoxide and sodium formaldehyde sulfoxylate, continuing to react for 0.5h, cooling to 45 DEG C, and adding ammonium hydroxide for adjusting the pH value to be 6-8. According to the synthetic method, a monomer pre-emulsification step is omitted in an emulsion polymerization process, the operation is simpler, the energy consumption is reduced, the work efficiency is improved, and at the same time, the emulsion has excellent performances and a good water-whitening resistant characteristic.

The invention discloses a preparation method of acrylic organosilicon soap-free copolymerized nano-emulsion. The raw materials are unsaturated monomer, organosilicon, reactive emulsifier, co-emulsifier, initiator and water, and soap-free polymerization and micro-emulsion polymerization technology are used, Acrylic organosilicon soap-free copolymer nanoemulsions were prepared by using reactive emulsifiers containing olefin bonds and introducing long carbon chain alcohols as co-emulsifiers. Using the microemulsion polymerization process, introducing long carbon chain alcohol, and adopting a high-speed emulsification method, the latex particles are formed into tiny micelles, and the polymerization is carried out in the micelles under the action of the initiator, and finally nano-sized micelles are obtained. , Isomorphic, clear and transparent emulsion products. Adopt soap-free polymerization process, use long carbon chain emulsifier containing olefin bonds, olefin bonds directly participate in the polymerization reaction and become part of the final latex particles, so that the final emulsion product does not contain free emulsifier, which ensures the final film formation of the emulsion Purity of the back membrane.

The invention relates to a sand-in-water coating and a preparation method thereof. The raw material of the sand-in-water coating includes a dispersed phase and a continuous phase; the dispersed phase includes the following components in weight percentage: 0.5%-1% of the first protective rubber powder; 20%-30% of pure acrylic emulsion; hollow microspheres 0.4%-0.7%; the first alkali swelling thickener 0.1%-0.5%; quartz sand 25%-35%; the first auxiliary agent 3%-10%; water 25%-40%; the continuous phase includes the following Components in weight percent: the second protective rubber powder 2%-4%; silicone acrylic emulsion 30%-50%; the second alkali swelling thickener 0.3%-0.6%; the second additive 3%-10%; water 50%-65%; the specific gravity of the dispersed phase is 1g / ml-1.06g / ml; the viscosity of the continuous phase is 40ku-55ku. The sand-in-water coating is prepared using a two-phase system, and the specific gravity of the dispersed phase is light. During the production, granulation, mixing, and storage of finished products, the color point is in a suspended state, and sedimentation is not easy to occur. The product has low viscosity, good color point separation effect, high production efficiency, good water whitening resistance and stable viscosity.

The invention discloses a water white resistant stone-like coating which is prepared from the following components: water-based acrylic emulsion, a film forming auxiliary, a defoaming agent, cellulose ether, color sand, silicon sol, corn hydroxypropyl starch and modified calcined clay. The stone-like coating disclosed by the invention is high in film forming property and cannot crack; under conditions of low temperature (4 to 6 DEG C) and high humidity (70 to 80 percent), the stone-like coating has outstanding advantages that the coating can be dried after being constructed within a short period of time (1.5 hours) and is not whitened in water.

The invention discloses a core-shell structure acrylate swelling type rheology modifier and a preparation method thereof. The rheology modifier has a three-layer hierarchical structure, which are: 1) a core structure layer, the The core structure layer is a slightly crosslinked copolymer containing acrylate monomers; 2) the transition layer is a non-crosslinked copolymer containing acrylate monomers; 3) the shell structure layer, The shell structure layer is a highly cross-linked copolymer containing acrylate monomers; the rheology modifier of the present invention can reduce the free water content of the system during the volume swelling process, thereby increasing the viscosity of the system, and Since the outer shell structure of the present invention will not burst, and the inner alkali-swellable hydrophilic substance will not enter the system, the effect on the water resistance and water whitening resistance of the product will be less affected.