A kind of anti-ultraviolet finishing agent and preparation method thereof

Abstract

The invention discloses a uvioresistant finishing agent which is composed of an ultraviolet light absorber, a dispersing agent, a defoaming agent and water, and further comprises a nanometer titania grafted copolymer, wherein the nanometer titania grafted copolymer is a grafted copolymer comprising nanometer titania, an acrylate monomer and a fluorine-containing monomer. The preparation method of the uvioresistant finishing agent comprises the following steps: mixing the ultraviolet light absorber, the dispersing agent, the defoaming agent and water, and then adding the nanometer titania grafted copolymer. Compared with the uvioresistant light absorber, the uvioresistant finishing agent dislcosed by the invention has the advantages of small synergistic effect between the uvioresistant light absorber and a nanometer material and excellent anti-ultraviolet performance.

Description

technical field

[0001] The invention belongs to the field of anti-ultraviolet finishing agents, and in particular relates to an anti-ultraviolet finishing agent and a preparation method thereof. technical background

[0002] Most of the sunlight irradiated vertically to the surface after being filtered by the atmosphere is visible light and infrared light, and ultraviolet light only accounts for about 6%. However, the absorption peaks of the molecular structures of polysulfone, polyethylene terephthalate and polyurethane are located in the ultraviolet region , Polystyrene, poly fatty acid ester, polyacrylate, polyamide and other polymers are also more sensitive to ultraviolet light, so the above-mentioned substances are easily degraded under the irradiation of ultraviolet light. In addition, residual catalysts and impurities such as trace peroxides and charge-transfer complexes produced during synthesis, processing, and storage can absorb ultraviolet light and cause degradat...

Examples

preparation example Construction

[0011] Wherein, the preparation method of described nano titanium dioxide graft copolymer comprises the following steps

[0012] a. Weigh a certain amount of nano-titanium dioxide particles and silane coupling agent in absolute ethanol, stir evenly, disperse ultrasonically for 10 minutes, heat in a water bath to 50-70°C for 5 hours, dry at 80°C and grind to obtain modification Nano titanium dioxide particles;

[0013] b. Add the modified nano-titanium dioxide particles to a certain concentration of polymerizable emulsifier aqueous solution, stir evenly and ultrasonically disperse for 10 minutes, add the initiator aqueous solution when the water bath is heated to 70-80°C, add dropwise the acrylate monomer and the remaining initiator After the dropwise addition, the reaction was continued for 5 hours, cooled naturally to room temperature, and filtered to obtain a uniform and stable nano-titanium dioxide graft copolymer.

[0014] In the nano-titanium dioxide graft copolymer, in ...

Embodiment 1

[0032] (1) Preparation of Nano Titanium Dioxide Graft Copolymer

[0033] a. Weigh 15 parts of nano-titanium dioxide particles and 2 parts of silane coupling agent in 150 mL of absolute ethanol, stir evenly and disperse ultrasonically for 10 minutes, heat in a water bath to 50°C for 5 hours, dry at 80°C and grind to obtain modification Nano titanium dioxide particles; the silane coupling agent is γ-methacryloxypropyltrimethoxysilane (KH-570).

[0034]b. Add the modified nano-titanium dioxide particles to a solution of 12 parts of polymerizable emulsifier and 300mL of water, stir evenly and then ultrasonically disperse for 10 minutes. When the water bath is heated to 70°C, add 0.5 parts of an aqueous solution of initiator potassium persulfate, dropwise The aqueous solution of 54 parts of acrylate monomer, 14 parts of fluorine-containing monomer and 0.5 part of initiator potassium persulfate, continued to react for 5 hours after the dropwise addition, naturally cooled to room tem...

Embodiment 2

[0042] (1) Preparation of Nano Titanium Dioxide Graft Copolymer

[0043] a. Weigh 17 parts of nano-titanium dioxide particles and 3 parts of silane coupling agent in 200mL of absolute ethanol, stir evenly and then ultrasonically disperse for 10 minutes, heat in a water bath to 60°C for 5 hours, dry at 80°C and grind to obtain modification Nano titanium dioxide particles; the silane coupling agent is vinyltriethoxysilane (KH-151).

[0044] b. Add the modified nano-titanium dioxide particles to a solution of 15 parts of polymerizable emulsifier and 300mL of water, stir evenly and ultrasonically disperse for 10 minutes. When the water bath is heated to 75°C, add 0.5 parts of the aqueous solution of initiator ammonium persulfate, dropwise The aqueous solution of 61 parts of acrylate monomer, 18 parts of fluorine-containing monomer and 0.7 part of initiator ammonium persulfate, continued to react for 5 hours after the dropwise addition, cooled naturally to room temperature, and fil...

technical field

[0001] The invention belongs to the field of anti-ultraviolet finishing agents, and in particular relates to an anti-ultraviolet finishing agent and a preparation method thereof. technical background

[0002] Most of the sunlight irradiated vertically to the surface after being filtered by the atmosphere is visible light and infrared light, and ultraviolet light only accounts for about 6%. However, the absorption peaks of the molecular structures of polysulfone, polyethylene terephthalate and polyurethane are located in the ultraviolet region , Polystyrene, poly fatty acid ester, polyacrylate, polyamide and other polymers are also more sensitive to ultraviolet light, so the above-mentioned substances are easily degraded under the irradiation of ultraviolet light. In addition, residual catalysts and impurities such as trace peroxides and charge-transfer complexes produced during synthesis, processing, and storage can absorb ultraviolet light and cause degradat...

Examples

preparation example Construction

[0011] Wherein, the preparation method of described nano titanium dioxide graft copolymer comprises the following steps

[0012] a. Weigh a certain amount of nano-titanium dioxide particles and silane coupling agent in absolute ethanol, stir evenly, disperse ultrasonically for 10 minutes, heat in a water bath to 50-70°C for 5 hours, dry at 80°C and grind to obtain modification Nano titanium dioxide particles;

[0013] b. Add the modified nano-titanium dioxide particles to a certain concentration of polymerizable emulsifier aqueous solution, stir evenly and ultrasonically disperse for 10 minutes, add the initiator aqueous solution when the water bath is heated to 70-80°C, add dropwise the acrylate monomer and the remaining initiator After the dropwise addition, the reaction was continued for 5 hours, cooled naturally to room temperature, and filtered to obtain a uniform and stable nano-titanium dioxide graft copolymer.

[0014] In the nano-titanium dioxide graft copolymer, in ...

Embodiment 1

[0032] (1) Preparation of Nano Titanium Dioxide Graft Copolymer

[0033] a. Weigh 15 parts of nano-titanium dioxide particles and 2 parts of silane coupling agent in 150 mL of absolute ethanol, stir evenly and disperse ultrasonically for 10 minutes, heat in a water bath to 50°C for 5 hours, dry at 80°C and grind to obtain modification Nano titanium dioxide particles; the silane coupling agent is γ-methacryloxypropyltrimethoxysilane (KH-570).

[0034]b. Add the modified nano-titanium dioxide particles to a solution of 12 parts of polymerizable emulsifier and 300mL of water, stir evenly and then ultrasonically disperse for 10 minutes. When the water bath is heated to 70°C, add 0.5 parts of an aqueous solution of initiator potassium persulfate, dropwise The aqueous solution of 54 parts of acrylate monomer, 14 parts of fluorine-containing monomer and 0.5 part of initiator potassium persulfate, continued to react for 5 hours after the dropwise addition, naturally cooled to room tem...

Embodiment 2

[0042] (1) Preparation of Nano Titanium Dioxide Graft Copolymer

[0043] a. Weigh 17 parts of nano-titanium dioxide particles and 3 parts of silane coupling agent in 200mL of absolute ethanol, stir evenly and then ultrasonically disperse for 10 minutes, heat in a water bath to 60°C for 5 hours, dry at 80°C and grind to obtain modification Nano titanium dioxide particles; the silane coupling agent is vinyltriethoxysilane (KH-151).

[0044] b. Add the modified nano-titanium dioxide particles to a solution of 15 parts of polymerizable emulsifier and 300mL of water, stir evenly and ultrasonically disperse for 10 minutes. When the water bath is heated to 75°C, add 0.5 parts of the aqueous solution of initiator ammonium persulfate, dropwise The aqueous solution of 61 parts of acrylate monomer, 18 parts of fluorine-containing monomer and 0.7 part of initiator ammonium persulfate, continued to react for 5 hours after the dropwise addition, cooled naturally to room temperature, and fil...

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