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US 9,169,403 B2Granted
Powder coating composition for PC strand coating, coating method, and coating film
AssigneesNippon Paint Co., Ltd., Sumitomo (SEI) Steel Wire Corp.
InventorsTomoyuki Hirai, Yoshitaka Ishihara, Koichiro Natori, Toshihiko Niki, Yoshihiko Touda, Takayuki Yamagiwa
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Abstract
A powder coating composition for PC strand coating which, when used for the coating of a PC strand, can advantageously form a coating film having an even thickness at low cost without causing uneven thickness or stringness is disclosed. The powder coating composition of this invention for PC strand coating is characterized by having a melt viscosity of 3,000-15,000 poise.
Claims15
A powder coating composition for prestressed concrete (PC) strand coating, wherein
- the powder coating composition has a melt viscosity of 3000 to 15000 poise,
- the powder coating composition comprises an epoxy resin and a curing agent,
- the curing agent is a diglycidylether-modified bisphenol A,
- the curing agent has a phenolic hydroxy equivalent within a range of 500 to 800 g/eq,
- a mixing ratio of the epoxy resin and the curing agent, which is an equivalent ratio of a phenolic hydroxy equivalent of the curing agent to an epoxy equivalent of the epoxy resin, is within a range of 0.7/1.0 to 1.5/1.0, and
- the powder coating composition is suitable for coating PC strands.
3 more elements
Dependencies are inferred from the claim text.