Process for providing low gloss coatings

Abstract

The present invention relates to a process process for producing a coating from an aqueous, radiation-curable coating composition, wherein the process comprises the steps in the sequence (1) to (4): (1) applying an aqueous, radiation-curable coating composition on a surface of a substrate, (2) drying the aqueous, radiation-curable coating composition, affording an at least partially dried coating composition, (3) irradiating the at least partially dried coating composition with UV light having a wavelength≤220 nm under inert atmosphere, followed by (4) irradiating with UV light having a wavelength≥300 nm or with E-beam, wherein the aqueous, radiation-curable coating composition is a dispersion comprising: (A) at least one water-dispersed vinyl polymer system (A), wherein the polymer system (A) comprises one or more vinyl polymer with a glass transition temperature Tg of less than or equal to 77° C. in an amount of at least 50 wt. %, based on the amount of the polymer system (A), wherein the Tg is determined with Differential Scanning Calorimetry as described in the description, the polymer system (A) is essentially free of radiation-curable, ethylenically unsaturated bonds, and the polymer system (A) has an acid value from 5 to 105 mg KOH/gram (A), (B) at least one radiation-curable diluent (B) with a molar mass less than 750 g/mol and with an acrylate functionality of 2 or 3, and (C) water and optionally organic solvent, whereby the optional organic solvent is present in an amount of at most 30 wt. %, based on the total amount of water and organic solvent, wherein the amount of (A) is from 30 to 75 wt. % and the amount of (B) is from 25 to 70 wt. %, based on the total amount of (A) and (B).

Dependencies are inferred from the claim text.