Nano titania modified unsaturated polyester resin and its prepn.

[0038] Put 0.6mol maleic anhydride, 0.29mol phthalic anhydride, 0.11mol adipic acid, 0.5mol ethylene glycol, 0.5mol 1, 2-propanediol, and 18.7ml nano titanium dioxide powder into a reaction that can withstand high temperatures of 200-300°C In the kettle, stir evenly, heat up to 160-240°C for reflux reaction, divide the water after two hours, and then divide the water every 1 hour; react to six hours, use a vacuum pump to remove small molecules; cool to 80°C, Add 1.2% hydroquinone by volume of the product, stir evenly and then discharge.

[0039] The obtained product is an earth red, opaque viscous body, wherein the content of the nano titanium dioxide powder is 8.3% of the total volume of the nano titanium dioxide modified unsaturated polyester resin.

[0041]Put 0.6mol maleic anhydride, 0.3mol phthalic anhydride, 0.1mol adipic acid, 0.5mol ethylene glycol, 0.5mol 1, 2-propanediol, and 24.3ml nano titanium dioxide powder into a reaction that can withstand high temperatures of 200-300°C In the kettle, stir evenly, raise the temperature to 160-240°C for reflux reaction, divide the water after 1 hour, then divide the water every 2 hours, react for six hours, then depressurize, remove small molecules with a vacuum pump; cool to 85°C , add 1% hydroquinone by product volume, and discharge after stirring evenly.

[0042] The obtained product is an earth red, opaque viscous body, wherein the content of the nanometer titanium dioxide powder is 10.5% of the total volume of the nanometer titanium dioxide modified unsaturated polyester resin.

[0044] Put 0.6mol maleic anhydride, 0.31mol phthalic anhydride, 0.09mol adipic acid, 0.5mol ethylene glycol, 0.5mol 1, 2-propanediol, and 34.3ml nano titanium dioxide powder into the reaction that can withstand high temperature of 200~300℃ In the kettle, stir evenly, heat up to 160-240°C for reflux reaction, divide the water after 1 hour, then divide the water every 2 hours, react for six hours, then decompress, remove small molecules with a vacuum pump; cool to At 90°C, add 1,4-hydroquinone with a volume of 1.05% of the product, stir evenly, and discharge.

[0045] The obtained product is an earth red, opaque viscous body, wherein the content of the nano titanium dioxide powder is 14.5% of the total volume of the nano titanium dioxide modified unsaturated polyester resin.

[0046] Wherein embodiment 2 is the best embodiment.