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Synthesis method of ultraviolet light absorber for water-based coiled material finish paint

A synthesis method and ultraviolet technology, applied in radiation-absorbing coatings, preparation of carboxylic acid halides, coatings, etc., can solve problems such as poor compatibility, migration on the surface of the coating film, and difficulty in dissolving

Pending Publication Date: 2021-05-14
万博新材料科技(南通)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional benzophenone UV absorbers are solid powders, which are difficult to dissolve in water-based coil topcoats, and small molecule UV absorbers have poor compatibility with base resins used in coil topcoats. Easy to migrate to the surface of the coating film

Method used

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  • Synthesis method of ultraviolet light absorber for water-based coiled material finish paint
  • Synthesis method of ultraviolet light absorber for water-based coiled material finish paint
  • Synthesis method of ultraviolet light absorber for water-based coiled material finish paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, [PhCO(C 6 h 4 )(2-OH)(4-OCO)] 2 CH 2 (OCH 2 CH 2 ) 13 Synthesis

[0027]Add 60g polyethylene glycol-600 (0.1mol) and toluene into a round bottom flask equipped with a stirring bar, a reflux condenser and a thermometer, and use toluene to bring water out of the polyethylene glycol. Under the protection of nitrogen, heat to 115°C, add enough sodium metal, and react for about 18 hours until the solution turns dark brown, remove the remaining sodium metal, and obtain sodium polyethylene glycol-600 toluene solution.

[0028] Weigh 12.2g of PhCO(C 6 h 4 )(2-OH)(4-OCOCH 2 Cl) (0.042mol) was placed in a 250mL three-necked round-bottomed flask equipped with a stirrer, a thermometer, and a reflux condenser, and a certain amount of toluene was added. After fully stirring and dissolving, the temperature was raised to 100°C. Under nitrogen protection, the The prepared sodium polyethylene glycol-600 toluene solution was slowly dripped in, and the dripping was ...

Embodiment 2

[0029] Embodiment 2, [PhCO(C 6 h 4 )(2-OH)(4-OCO)] 2 CH 2 (OCH 2 CH 2 ) 22 Synthesis

[0030] Add 100g polyethylene glycol-1000 (0.1mol) and toluene into a round bottom flask equipped with a stirring bar, a reflux condenser and a thermometer, and use toluene to bring water out of the polyethylene glycol. Under the protection of nitrogen, heat to 115°C, add enough sodium metal, and react for about 18 hours until the solution turns dark brown, remove the remaining sodium metal, and obtain sodium polyethylene glycol-1000 toluene solution.

[0031] Weigh 12.2g of PhCO(C 6 h 4 )(2-OH)(4-OCOCH 2 Cl) (0.042mol) was placed in a 250mL three-necked round-bottomed flask equipped with a stirrer, a thermometer, and a reflux condenser, and a certain amount of toluene was added. After fully stirring and dissolving, the temperature was raised to 100°C. Under nitrogen protection, the The prepared sodium polyethylene glycol-1000 toluene solution was slowly dripped in, and the dripping...

Embodiment 3

[0032] Embodiment 3, [PhCO(C 6 h 4 )(2-OH)(4-OCO)] 2 CH 2 (OCH 2 CH 2 ) 45 Synthesis

[0033] Add 100g polyethylene glycol-2000 (0.05mol) and toluene into a round bottom flask equipped with a stirring bar, a reflux condenser and a thermometer, and use toluene to bring water out of the polyethylene glycol. Under the protection of nitrogen, heat to 115°C, add enough sodium metal, and react for about 18 hours until the solution turns dark brown, remove the remaining sodium metal, and obtain sodium polyethylene glycol-2000 toluene solution.

[0034] Weigh 6.1g of PhCO(C 6 h 4 )(2-OH)(4-OCOCH 2 Cl) (0.021mol) was placed in a 250mL three-necked round-bottomed flask equipped with a stirrer, a thermometer, and a reflux condenser, and a certain amount of toluene was added. After fully stirring and dissolving, the temperature was raised to 100°C. Under nitrogen protection, the The prepared sodium polyethylene glycol-2000 toluene solution was slowly dripped in, and the dripping...

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Abstract

The invention provides a synthesis method of an ultraviolet light absorber for water-based coiled material finish paint, and particularly relates to the technical field of polymer synthesis and paints. The method comprises the steps: S1, taking 2,4-dihydroxybenzophenone (UV-0) as a parent body, introducing an active reaction group through molecular design, and preparing a reaction type benzophenone monomer; and S2, enabling the active monomer containing the benzophenone structure in the S1 to react with sodium polyethylene glycol with different molecular weights so as to obtain a target product. The water solubility of the ultraviolet light absorber can be effectively improved; and the compatibility of the ultraviolet light absorber and base resin can be improved, the defects that a traditional benzophenone ultraviolet light absorber is insoluble in water, poor in compatibility, prone to migration and the like are overcome, and when the ultraviolet light absorber is used in cooperation with the water-based coiled material finish paint, the light aging resistance of a coating film can be effectively improved.

Description

technical field [0001] The invention belongs to the field of polymer synthesis and coating technology, and in particular relates to a method for synthesizing an ultraviolet absorber for a water-based coil topcoat. Background technique [0002] Benzophenone UV absorbers are widely used because of their low price, and these compounds are basically derivatives of 2,4-dihydroxybenzophenone. It is generally believed that benzophenone ultraviolet absorbers convert harmful ultraviolet light energy into harmless heat energy through the following two ways: (1) Hydroxyl hydrogen and carbonyl oxygen on the benzene ring form intramolecular hydrogen bonds to form a chelate Close the ring. When irradiated by ultraviolet light, the molecule undergoes thermal vibration, the hydrogen bond is broken, the chelate ring is opened, and the light energy is converted into heat energy; (2) benzophenone molecules can undergo tautomerization to generate an enol structure, which is also a dissipative ...

Claims

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Application Information

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IPC IPC(8): C09D167/00C09D161/20C09D5/32C09D7/48C07C67/14C07C69/63C08G65/337
CPCC07C67/14C08G65/337C08L2201/08C09D5/32C09D167/00C09D7/48C07C69/63C08L61/20C08L71/02
Inventor 张引张亚储晖何广平
Owner 万博新材料科技(南通)有限公司
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