US 12,031,055 B2
Filled composition with rapid UV cure to form thick coating
Mehdi Habibpour, Glenview, IL (US); Matthew J. Lertola, Glenview, IL (US); and Grant Shouldice, Glenview, IL (US)
Assigned to Illinois Tool Works Inc., Glenview, IL (US)
Filed by Illinois Tool Works Inc., Glenview, IL (US)
Filed on Nov. 6, 2020, as Appl. No. 17/091,098.
Claims priority of provisional application 62/948,476, filed on Dec. 16, 2019.
Prior Publication US 2021/0179887 A1, Jun. 17, 2021
Int. Cl. C09D 175/14 (2006.01); B05D 3/06 (2006.01); B60S 5/00 (2006.01); C08G 18/04 (2006.01); C08K 3/26 (2006.01); C09D 7/61 (2018.01)
CPC C09D 175/14 (2013.01) [B05D 3/065 (2013.01); B60S 5/00 (2013.01); C08G 18/04 (2013.01); C08K 3/26 (2013.01); C09D 7/61 (2018.01); C08K 2003/265 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method of repairing a vehicle body comprising:
applying an uncured layer of a composition comprising:
an aliphatic urethane acrylate resin; a multifunctional crosslinking agent together with the aliphatic urethane acrylate resin being present up to 70 total weight precent; a photoinitiator; a chemical initiator system, and a cure promoter together with the photoinitiator and the chemical initiator system being present up to 6.9 total weight precent; and a particulate filler in an amount to yield an opacity of greater than 20% to the vehicle body and being present in an amount of at least 20 total weight percent; and
exposing the uncured layer to actinic radiation to induce cure of the uncured layer to sandable coating in a time of between 1 and 5 minutes for a thickness of 5 millimeters.