EP 4204462 A1 20230705 - METHOD FOR UV CURING OF WATER-BASED POLYURETHANE PAINT DISPERSIONS WITHOUT UV-C-ACTIVATABLE SURFACE INITIATORS
Title (en)
METHOD FOR UV CURING OF WATER-BASED POLYURETHANE PAINT DISPERSIONS WITHOUT UV-C-ACTIVATABLE SURFACE INITIATORS
Title (de)
VERFAHREN ZUR UV-HÄRTUNG VON WÄSSRIGEN POLYURETHANLACKDISPERSIONEN OHNE UV-C-AKTIVIERBARE OBERFLÄCHENINITIATOREN
Title (fr)
PROCÉDÉ DE SÉCHAGE UV DE DISPERSIONS DE PEINTURE DE POLYURÉTHANE À BASE D'EAU SANS INITIATEURS DE SURFACE POUVANT ÊTRE ACTIVÉS PAR UV-C
Publication
Application
Priority
- EP 20193391 A 20200828
- EP 2021073036 W 20210819
Abstract (en)
[origin: WO2022043180A1] The invention relates to a method for producing a paint coating on a substrate by UV curing of a water-based paint formulation comprising an aqueous dispersion of urethane (meth)acrylates, said method comprising the steps in the sequence (i) to (iv): (i) applying the paint formulation comprising the aqueous dispersion of urethane (meth)acrylates to the substrate; (ii) drying the paint formulation; (iii) curing the dried paint formulation by irradiating with UV-C radiation in the 180 to 280 nm wavelength range, affording an at least partially cured paint film; (iv) optionally irradiating the at least partially cured paint film with UV radiation having a wavelength of ≥ 350 nm for further curing of the paint film; wherein the total content in the paint formulation of photoinitiators activatable by UV radiation having a wavelength of < 350 nm is < 0.01% by weight based on the solids content of the paint formulation.
IPC 8 full level
C08F 2/48 (2006.01); C08K 3/013 (2018.01); C09D 4/00 (2006.01)
CPC (source: EP)
C08F 2/48 (2013.01); C08K 3/013 (2017.12); C09D 4/00 (2013.01)
Citation (search report)
See references of WO 2022043180A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DOCDB simple family (application)
EP 2021073036 W 20210819; EP 21766434 A 20210819