KR910003136A - Manufacturing method of antifogging film - Google Patents

Abstract

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Description

Manufacturing method of antifogging film

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Claims (14)

As a main component, a composition containing (A) polyvinyl alcohol, (B) crosslinker, (C) water, and (D) nitrogen-containing organic solvent is coated on a substrate, and the coated composition is thermoset. To produce an anti-fogging coating. The method according to claim 1, wherein the average degree of polymerization of the polyvinyl alcohol is 250 to 3,000 and the degree of saponification is at least 70 mol%. The process of claim 1, wherein the crosslinker is selected from finely divided silicas having an average particle diameter of 5 μm to 200 μm, organosilicon compounds of Formulas (I) and (II), and hydrolysis products thereof. Wherein R ⁴ , R ³ and R ⁵ are organic groups having 4 to 14 carbon atoms, containing epoxy groups, and R ² , R ⁴ and R ⁶ are hydrocarbon groups having 1 to 14 carbon atoms, or halogeno groups, mer A hydrocarbon group having 1 to 14 carbon atoms having a substituent selected from a capto group, cyano group, methacryloxy group, acryloxy group and amino group, X and Q are hydrolyzable groups, and a, c and c are each 0 or 1, each of bd and f is 0.1 or 2, provided that each of (a + b), (c + d) and (e + f) is 0.1 or 2, and Y is an organic group having 2 to 40 carbon atoms to be. A process according to claim 1 wherein the amount of solid crosslinker as component (B) is 1.0 to 200 parts by weight per 100 parts by weight of solid polyvinyl alcohol. The process of claim 1 wherein the boiling point of the nitrogen-containing organic solvent is from 105 to 300 ° C. 3. The process of claim 1 wherein the nitrogen-containing organic solvent is a solvent in which polyvinyl alcohol is dissolved. The process of claim 1, wherein the nitrogen-containing organic solvent is selected from dimethyl formamide, dimethylacetamide, pyridine and dialkyl imidazolininone. The process of claim 1 wherein the nitrogen-containing organic solvent is dimethyl imidazolidinone. The process of claim 1 wherein the nitrogen-containing organic solvent is used in an amount of 20 to 500 parts by weight per 100 parts by weight of solid polyvinyl alcohol. The process of claim 1 wherein the nitrogen-containing organic solvent is contained in the composition in component (C) in an amount of 5 to 2,000 parts by weight per 100 parts by weight of water. The method of claim 1, further comprising impregnating the heat-cured coating in an aqueous solution containing 0.01-40% by weight of alkali based on the aqueous solution for 0.1 minutes to 5 hours. The method of claim 1, further comprising impregnating the thermoset coating in an aqueous solution containing 0.01-40% by weight of acid based on the aqueous solution for 0.1 minutes to 5 hours. The method of claim 1, further comprising impregnating the thermoset coating in an aqueous solution containing 0.01 to 4 weight percent of the surfactant, based on the aqueous solution, for 0.5 minutes to 5 hours. The method of claim 1, further comprising treating the thermally cured coating for 0.5 minutes to 5 hours at a temperature of at least 50 ° C. and at least 70% relative humidity. ※ Note: The disclosure is based on the initial application.