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Nano titania modified unsaturated polyester resin and its prepn.

A technology of nano-titanium dioxide and polyester resin, which is applied in the field of nano-titanium dioxide-modified unsaturated polyester resin and its preparation, which can solve the problems of easy aging, easy cracking, waste of raw materials, etc., and achieve easier curing, less cracking, and a wide range of applications Effect

Inactive Publication Date: 2005-11-23
李明利 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, general-purpose unsaturated polyester resins have the following disadvantages: poor mechanical properties, low strength, and poor toughness; easy to crack after curing, and cannot cast large and complex parts; and has no shielding effect on electromagnetic waves, and is easy to age under ultraviolet light.
During the preparation of general-purpose unsaturated polyester resin, since the raw material diol is reduced due to volatilization, in order to ensure the equimolar reaction of dibasic alcohol and dibasic acid, an excessive amount of dibasic alcohol needs to be added at the initial stage of the reaction, resulting in waste of raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[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.

Embodiment 2

[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.

Embodiment 3

[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.

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PUM

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Abstract

The invention refers to a kind of nano titanium dioxide-modified, unsaturated polyester resin and its preparation method. The technical project is as follows: the products is gained by the polymeric reaction of the dibasic acid, the dibasic alcohol and nano titanium dioxide powder, and the ratio of the dibasic acid with the dibasic alcohol is 0.95-1.05:0.95-1.05 (mol ratio), and the content of the nano titanium dioxide powder is 1-20% of the total bulk of the nano titanium dioxide-modified, unsaturated polyester resin; the provided preparation method is that: after mixing the dibasic acid, the dibasic alcohol and the nano iron dioxide powder, raise the temperature to 160-240 centigrade to have the return reaction, then get rid of the little molecules, and then cool the mixture to 80-100 centigrade to eject the material.

Description

Technical field: [0001] The invention relates to a nano titanium dioxide modified unsaturated polyester resin and a preparation method thereof. Background technique: [0002] At present, general-purpose unsaturated polyester resins have the following disadvantages: poor mechanical properties, low strength, and poor toughness; easy to crack after curing, and cannot cast large and complex parts; and have no shielding effect on electromagnetic waves, and are prone to aging under ultraviolet light. Although the existing toughening modification methods improve the toughness of unsaturated polyester resin to a certain extent, they damage other excellent properties of the resin, such as reducing the strength and heat resistance of the resin. During the preparation of general-purpose unsaturated polyester resin, since the raw material diol is reduced due to volatilization, in order to ensure the equimolar reaction of dibasic alcohol and dibasic acid, an excessive amount of dibasic a...

Claims

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Application Information

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IPC IPC(8): C08G63/52C08G63/78C08K3/20
Inventor 徐颖李明利
Owner 李明利