US 11,753,563 B2
Polyaspartic coating composition, coating film, and coated article
Satoshi Takeno, Tokyo (JP)
Assigned to ASAHI KASEI KABUSHIKI KAISHA, Tokyo (JP)
Appl. No. 16/491,027
Filed by ASAHI KASEI KABUSHIKI KAISHA, Tokyo (JP)
PCT Filed Mar. 1, 2018, PCT No. PCT/JP2018/007802
§ 371(c)(1), (2) Date Sep. 4, 2019,
PCT Pub. No. WO2018/163959, PCT Pub. Date Sep. 13, 2018.
Claims priority of application No. 2017-043141 (JP), filed on Mar. 7, 2017; and application No. 2017-169741 (JP), filed on Sep. 4, 2017.
Prior Publication US 2020/0010723 A1, Jan. 9, 2020
Int. Cl. C09D 177/04 (2006.01); C08G 18/42 (2006.01); C08G 18/79 (2006.01); C09D 5/08 (2006.01); C09D 175/04 (2006.01); C08G 18/73 (2006.01); C08G 18/02 (2006.01); C08G 18/09 (2006.01); C08G 18/78 (2006.01); C09D 175/06 (2006.01); C08G 18/10 (2006.01); B05D 7/00 (2006.01); B05D 7/24 (2006.01); B32B 27/18 (2006.01); B32B 27/40 (2006.01); C08G 18/32 (2006.01)
CPC C09D 177/04 (2013.01) [B05D 7/00 (2013.01); B05D 7/24 (2013.01); B32B 27/18 (2013.01); B32B 27/40 (2013.01); C08G 18/022 (2013.01); C08G 18/092 (2013.01); C08G 18/10 (2013.01); C08G 18/32 (2013.01); C08G 18/4277 (2013.01); C08G 18/73 (2013.01); C08G 18/7837 (2013.01); C08G 18/79 (2013.01); C08G 18/792 (2013.01); C09D 5/08 (2013.01); C09D 175/04 (2013.01); C09D 175/06 (2013.01)] 17 Claims
 
1. A method for preventing corrosion of a structure, comprising:
coating the structure with a polyaspartic coating composition, comprising:
(A) an aspartic acid ester compound represented by the following formula (I)

OG Complex Work Unit Chemistry
wherein X is an n-valent organic group obtained by removing a primary amino group of an n-valent polyamine, and R1 and R2 are the same or different organic groups which are inert to the isocyanate group under a reaction condition, and n is an integer of 2 or more, and
(B) a polyisocyanate component obtained by reacting one or two or more diisocyanate monomers selected from the group consisting of an aliphatic and alicyclic diisocyanate with a polycaprolactone polyol having a number-average molecular weight of 500 to 1,500,
wherein
a ratio of the polycaprolactone polyol to a total amount of the polyol is 20% by mass or more,
the polyisocyanate component contains 10.0% by mass or less of an isocyanurate trimer with respect to a total amount of the polyisocyanate component,
the structure is a bridge, a highway, a power transmission tower, or a wind power generation blade, and
the polyol further contains a polyoxyalkylene polyol.