Preparation method of toughened and anti-aging unsaturated polyester resin
A polyester resin, unsaturated technology, applied in the field of preparation of toughened anti-aging unsaturated polyester resin, can solve the problems of poor toughness, easy aging, low bond strength, etc., to achieve curing crosslinking promotion, strong anti-oxidation Performance, the effect of excellent adhesive strength
Inactive Publication Date: 2018-12-07
翟琳
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Problems solved by technology
[0005] The technical problem mainly solved by the present invention is aimed at the current unsaturated polyester resin with low bonding strength, poor toughness, easy to crack after curing, unable to cast large complex parts, and has no shielding effect on electromagnetic waves, and is easy to age under ultraviolet light irradiation. Deficiency, a kind of preparation method of toughening anti-aging unsaturated polyester resin is provided
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[0023]In parts by weight, add 50-60 parts of distilled water, 10-15 parts of sodium dodecylsulfonate, 4-5 parts of carbonic acid Sodium hydrogen, start the stirrer to stir at a speed of 200-220r / min, raise the temperature in the water bath to 70-85°C, add 40-45 parts of acrylic acid and 20-30 parts of methacrylic acid into the three-necked flask, and continue the reaction for 10-15 minutes to obtain Seed emulsion; in parts by weight, add 20 to 30 parts of epoxidized soybean oil to the above-mentioned three-necked flask, and then use a dropping funnel to drop 1 to 3 parts of over- Potassium sulfate, after the dropwise addition, keep the temperature for 30-40 minutes, continue to heat up to 90-100 °C, keep the temperature for 45-55 minutes, cool down to 55-60 °C, adjust the pH to 6.0-7.0 with 20% ammonia water by mass fraction, Discharge to obtain acrylate emulsion; add 40-50mL of absolute ethanol and 2-3g of carbon nanotubes to the ultrasonic disperser, control the ultrasonic f...
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Abstract
The invention discloses a preparation method of toughened and anti-aging unsaturated polyester resin which belongs to the technical field of resin preparation. In the preparation method, a hydroxyl condensation dehydration reaction is produced on epoxidized soybean oil and acrylate ester to form a network interpenetrating cross-linking structure; the epoxidized soybean oil contains a polar group and an active group such as an epoxy group, an ether bond and a hydroxyl group to make an acrylate glue solution exhibit excellent bonding strength; the epoxidized soybean oil in an acrylate emulsion has strong anti-oxidation performance, and can promote curing cross-linking of polyester resin, and at the same time, the phenomenon of aging and yellowing of the polyester resin can be reduced; carbonnanotubes are utilized as electron acceptors, and easily accept photogenerated electrons produced by titanium dioxide, thereby effectively suppressing recombination of the photogenerated electrons and holes, the absorption of ultraviolet light by titanium dioxide is increased; and the photocatalysis of the titanium dioxide can reinforces degradation and volatilization of organic solvents in polyester resin to accelerate curing of polyester resin. The toughened and anti-aging unsaturated polyester resin has a wide application prospect.
Description
technical field [0001] The invention discloses a preparation method of toughened and anti-aging unsaturated polyester resin, which belongs to the technical field of resin preparation. Background technique [0002] Unsaturated polyester resin is generally a linear polymer compound with ester bonds and unsaturated double bonds formed by polycondensation of unsaturated dibasic acid diols or saturated dibasic acid diols. Usually, the polyester polycondensation reaction is carried out at 190-220°C until the desired acid value (or viscosity) is reached. After the polyester polycondensation reaction is completed, a certain amount of vinyl monomer is added while it is hot to form a viscous Such a polymer solution is called an unsaturated polyester resin. Unsaturated polyester resin has excellent mechanical properties, electrical properties and chemical corrosion resistance, and is easy to process. It is widely used in glass fiber reinforced materials, chemical anticorrosion, castin...
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IPC IPC(8): C08L67/06C08L95/00C08L91/00C08L33/02C08K9/12C08K7/24C08K3/22
CPCC08L67/06C08K2003/2241C08K2201/011C08L2201/08C08L2205/035C08L95/00C08L91/00C08L33/02C08K9/12C08K3/041C08K3/22
Inventor 翟琳邓博朱彩娣
Owner 翟琳
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