US 12,240,939 B2
Leading edge protection composition and uses thereof
Enrique Cortes Fibla, La Pobla de Vallbona (ES)
Assigned to AEROX ADVANCED POLYMERS, SL, La Pobla de Vallbona (ES)
Appl. No. 17/289,176
Filed by AEROX ADVANCED POLYMERS, SL, La Pobla de Vallbona (ES)
PCT Filed Oct. 30, 2019, PCT No. PCT/EP2019/079670
§ 371(c)(1), (2) Date Apr. 27, 2021,
PCT Pub. No. WO2020/089296, PCT Pub. Date May 7, 2020.
Claims priority of application No. 18382762 (EP), filed on Oct. 30, 2018.
Prior Publication US 2021/0395435 A1, Dec. 23, 2021
Int. Cl. C09D 175/06 (2006.01); C08G 18/44 (2006.01); C08G 18/73 (2006.01); F03D 1/06 (2006.01)
CPC C08G 18/44 (2013.01) [C08G 18/73 (2013.01); C09D 175/06 (2013.01); F03D 1/0675 (2013.01); C08G 2150/00 (2013.01); F05B 2280/4003 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A leading edge protection (LEP) having a Shore A hardness of between 30 and 80 in accordance to ISO 868, in the form of a single layer with a thickness between 550 microns and 1,000 microns wherein said leading edge protection consists of cured polyurethane obtained from a composition comprising
a first component comprising more than 80% by weight of a polycarbonate diol in respect of the total weight of the first component; and
a second component comprising an aliphatic isocyanate having a molecular weight of from 500-2,000 g/mol selected from the group consisting of isocyanurates, biurets, iminooxadiazinediones, allophanates dimer urediones and mixtures thereof,
wherein the composition is solvent free and pigmennt-free and
optionally contains 0.01-0.30 wt % catalysts; 0.30-1.20 wt % antifoaming agent; 0.01 wt %
deaerating agent 0.10 to 0.60 adherence improving agent and 0.50 to 4.00 wt % thixotropic agent based on the weight of the first component;
wherein the polycarbonate diol and the aliphatic isocyanate are in the composition in a ratio of about 2:1.