	US 12,453,985 B2
	Method of coating a substrate by electron beam curing
Silvia Mansi, Varese (IT); Domenico Vetri, Gallarate (IT); Thomas Gallo, Gallarate (IT); Daria Diamante, Varese (IT); Mariuccia De Luca, Lonate Pozzolo (IT); Stefano Fumagalli, Carnago (IT); Giovanni Floridi, Novara (IT); and Giuseppe Li Bassi, Gavirate (IT)
Assigned to LAMBERTI SPA, Albizzate (IT)
Appl. No. 17/793,335
Filed by LAMBERTI SPA, Albizzate (IT)
PCT Filed Jan. 28, 2021, PCT No. PCT/EP2021/052015 § 371(c)(1), (2) Date Jul. 15, 2022, PCT Pub. No. WO2021/152031, PCT Pub. Date Aug. 5, 2021.
Claims priority of application No. 102020000001963 (IT), filed on Jan. 31, 2020.
Prior Publication US 2023/0103310 A1, Apr. 6, 2023
Int. Cl. B05D 3/06 (2006.01); B05D 3/02 (2006.01); C09D 11/30 (2014.01); C09D 175/04 (2006.01)

CPC B05D 3/068 (2013.01) [B05D 3/0254 (2013.01); B05D 2202/00 (2013.01); B05D 2203/35 (2013.01); B05D 2503/00 (2013.01); C09D 11/30 (2013.01); C09D 175/04 (2013.01)]

20 Claims

1. Method of coating a substrate comprising the steps of:

applying to the substrate from 0.1 to 250 g/m²m²(dry matter) of a radiation curable aqueous composition comprising from 15 to 50 wt % of a dispersed polymeric binder and from 0 to 15 wt % of an unsaturated reactive diluent;

thermally drying the aqueous composition to form a dust-free film; and

electron beam curing the thermally dried composition,

the method being characterized by the fact that the dispersed polymeric binder is a polyurethane binder, the aqueous coating composition is a physically drying, film-forming aqueous composition containing from 100 to 600 meq/100 g (dry matter) of radiation curable unsaturated groups and that the curing is performed in air atmosphere.