Patent ID: 9631116
Date: 2017-04-25
CPC Classifications: C08G,C08L,C09D

Claim:
1. An ultraviolet (UV) radiation curable aqueous coating composition comprising: (A) 10 to 99 wt % of a polyurethane obtained by the reaction of components comprising: (B) 1 to 90 wt % of a radiation curable component carrying two or more radiation polymerizable ethylenically unsaturated bonds which are capable of crosslinking; and (C) 0.1 to 10 wt % of an associative thickener; wherein (A)+(B)+(C) add up to 100 wt %; and wherein at least 80 wt % of the polyurethane (A)+(B)+(C) has a particle size greater than 500 nm; and wherein the C═C bond concentration of the composition is 0.2 to 5.0 mmol per g of (A)+(B)+(C) and wherein crosslinking of the aqueous coating composition is initiated by UV radiation, and wherein the coating composition exhibits an 85° gloss of <60 upon curing in the absence of a flattening agent.