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US 12,716,008 B2Granted
Solvent-free coating composition
AssigneePPG SSC Co., Ltd.
InventorsJe Hyuk Kim, Hong Chul Moon, Hyun Jik Lee
Life of this patent
Estimating the term…
Abstract
The present invention relates to a coating composition which is an anticorrosive paint for ship structures and can be coated by a regular airless painting machine, and is solvent-free or contains a low solvent content. The coating composition according to an embodiment of the present invention may exhibit excellent pot life, atomization and drying time, and is eco-friendly due to having a high solid content and thus lower VOC emissions.
Claims21
A coating composition comprising:
- a first liquid that comprises
- (A) an epoxy resin comprising (A1) a bisphenol A epoxy resin and (A2) a hydrogenated bisphenol A epoxy resin, wherein the composition is free of a bisphenol F epoxy resin;
- (B) a reactive diluent;
- and
- (C) a silane compound;
- and
- a second liquid that comprises
- (D) an amine-based curing agent;
- (E) a pigment comprising (E1) 0.1 to 25% by weight of a color pigment and (E2) 25 to 60% by weight of an extender pigment, based on the total weight of the composition;
- wherein:
- the coating composition has a solids content of 90% or more by weight when measured according to ASTM D5201-05;
- has a viscosity of 60 to 110 KU (Krebs) when measured according to ASTM D562-10 at a temperature of 23° C. and a relative humidity of 50%;
- the ratio of the active hydrogen equivalent in the curing agent to the epoxy equivalent in the first liquid ranges from 50:100 to 100:100;
- and
- the weight ratio of bisphenol A epoxy resin (A1) to hydrogenated bisphenol A epoxy resin (A2) ranges from 60:40 to 25:75.
12 more elements
A coating composition, comprising:
- (A) an epoxy resin comprising (A1) 5 to 25% by weight of a bisphenol A epoxy resin and (A2) 5 to 50% by weight of a hydrogenated bisphenol A epoxy resin, wherein the composition is free of a bisphenol F epoxy resin,
- (B) 2.5-10% by weight of a reactive diluent,
- (C) 2.5 to 17% by weight of a silane compound,
- (D) an amine-based curing agent,
- (E) a pigment comprising (E1) 0.1 to 25% by weight of a color pigment and (E2) 25 to 60% by weight of an extender pigment,
- (F) 0.1-5% by weight of an anti-settling agent, and
- (G) 0-4% by weight of a solvent, based on the total weight of the composition;
- wherein;
- the coating composition has a solids content of at least 90% by weight when measured according to ASTM D5201-05;
- the coating composition has a viscosity of 60 to 110 KU (Krebs) when measured according to ASTM D562-10 at a temperature of 23° C. and a relative humidity of 50%;
- the ratios of active hydrogen equivalents in the curing agent to epoxy equivalents in the coating composition range from 50:100 to 100:100;
- and
- the weight ratio of the bisphenol A epoxy resin (A1) to the hydrogenated bisphenol A epoxy resin (A2) ranges from 60:40 to 25:75.
10 more elements
Dependencies are inferred from the claim text.