Antifogging agent, preparation method and application thereof, and antifogging product
A technology of anti-fogging agent and phenolic resin, which is applied in the field of polymers, can solve the problems that anti-fogging agents cannot have both high transparency and anti-fog durability at the same time, achieve high water resistance and anti-fog performance, ensure transparency, and improve transparency Effect
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[0056] A second aspect of the present invention provides a method for preparing an antifogging agent, the method comprising: stirring the modified phenolic resin, perfluoroalkyl quaternary ammonium salt, polyvinylpyrrolidone and ethanol aqueous solution until dissolved, to obtain the antifogging agent;
[0057] Wherein, the modified phenolic resin is selected from phenolic resin esterified sulfonate and / or phenolic resin esterified benzenesulfonate;
[0058] Wherein, the weight ratio of the modified phenolic resin, perfluoroalkyl quaternary ammonium salt, polyvinylpyrrolidone and ethanol aqueous solution is 0.5-10:0.1-3:0.1-5:82-99.3.
[0059] In the present invention, the order of adding the modified phenolic resin, perfluoroalkyl quaternary ammonium salt, polyvinylpyrrolidone and ethanol aqueous solution is not particularly limited. Add to ethanol aqueous solution to dissolve.
[0060]In the present invention, in order to promote the dissolution of the modified phenolic res...
Embodiment 1
[0076] (1) Preparation of modified phenolic resin
[0077] Dissolve 24g of pure p-methyl phenolic resin (purchased from Weihai Economic and Technological Development Zone Tiancheng Chemical Co., Ltd. with the brand name of BTB-25) in 200mL of tetrahydrofuran (THF), chop 2.5g of sodium metal and add it, mix at room temperature for 0.5 h; Then dropwise add the tetrahydrofuran solution of 3-sulfopropionic anhydride (purchased from Shanghai Sanmu Chemical Technology Co., Ltd.) (3-sulfopropionic anhydride 14.85g, tetrahydrofuran solution 200mL), phenolic resin: the weight of 3-sulfopropionic anhydride The ratio is 1.62:1, and after about 1h, the reaction mixture is obtained; the reaction mixture is reacted at room temperature for 1h, and then heated to 70 °C for esterification for 3h; the product obtained after the esterification is spray-dried to obtain solid powder.
[0078] The solid powder was analyzed by infrared spectroscopy, and the wave number was 3400cm -1 It is the abs...
Embodiment 2
[0083] (1) Preparation of modified phenolic resin
[0084] The pure m-methyl phenolic resin of 4.8g (purchased from Benxi Ruishida Chemical Co., Ltd. with the trade name BX-30) was dissolved in 40mL of dioxane, and a total of 0.63g of sodium hydride (dispersed in 3 batches) was slowly added. In mineral oil, wherein the concentration of sodium hydride is 60% by weight), react at room temperature for 1h; then dropwise add the dioxane solution (4- Methyl-3-sulfopropionic anhydride 3.93g, dioxane 20mL), the weight ratio of phenolic resin: 4-methyl-3-sulfopropionic anhydride was 1.22:1, and after about 1h, a reaction mixture was obtained; The reaction mixture was pre-reacted at room temperature for 1.2 h, and then heated to 75° C. for esterification reaction for 2 h; the product obtained after the esterification reaction was completed was spray-dried to obtain solid powder.
[0085] The solid powder was analyzed by infrared spectroscopy, and the wave number was 3400cm -1 It is t...
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