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US 9,732,232 B2Granted
Abrasion resistant coatings
AssigneeHontek Corporation
InventorShek Hong
Life of this patent
Estimating the term…
Abstract
A polyurethane or polyurea coating composition for use in protecting a leading edge substrate on an airfoil, such as aircraft wings, rotor blades and propeller blades, against liquid or solid particle erosion, the composition made from an isocyanate-terminated prepolymer and curing agents, such as polyaspartic esters, aldimines and ketimines.
Claims39
A coating composition for use in protection of a leading edge substrate on an airfoil against liquid and solid particle erosion, comprising:
- an isocyanate-terminated prepolymer with an isocyanate content of about 0.5 to about 40 weight percent, based on the weight of the prepolymer;
- a polyol curing agent;
- said composition in dry cured form having tensile strength from 1000 psi (70 kg/cm2) to 7233 psi (508 kg/cm2), an elongation at break from 350% to 1250%, a tensile set after break from 10% to 150% and a Shore A hardness of 44A to 95A as measured at 68° F.
A coating composition for use in protection a leading edge substrate on an airfoil against liquid and solid particle erosion, comprising:
- an isocyanate-terminated prepolymer with an isocyanate content of about 0.5 to about 40 weight percent, based on the weight of the prepolymer;
- and
- a curing agent selected from the group consisting of polyaspartic esters, aldimines, ketimines, amines and mixtures thereof;
- said composition in dry cured form having tensile strength from 1000 psi (70 kg/cm2) to 7233 psi (508 kg/cm2), an elongation at break from 350% to 1250%, a tensile set after break from 10% to 150% and a Shore A hardness of 44A to 95A as measured at 68° F.
1 more element
A coating composition for use in protection a leading edge substrate on an airfoil against liquid and solid particle erosion, comprising:
- an isocyanate-terminated prepolymer with an isocyanate content of about 1.0 to about 20 weight percent, based on the weight of the prepolymer;
- a curing agent selected from the group consisting of polyaspartic esters, aldimines, ketimines, amines and mixtures;
- said composition in dry cured form having tensile strength from 1000 psi (70 kg/cm2) to 7233 psi (508 kg/cm2), an elongation at break from 350% to 1250%, a tensile set after break from 10% to 150% and a Shore A hardness of 44A to 95A as measured at 68° F.
A coating composition for use in protection a leading edge substrate on an airfoil against liquid and solid particle erosion, comprising:
- an isocyanate-terminated prepolymer with an isocyanate content of about 0.5 to about 40 weight percent, based on the weight of the prepolymer;
- a curing agent comprising one or more polyols and a second curative selected from the group consisting of polyaspartic esters, ketimines, aldimines, amines and mixtures thereof;
- said composition in dry cured form having tensile strength from 1000 psi (70 kg/cm2) to 7233 psi (508 kg/cm2), an elongation at break from 350% to 1250%, a tensile set after break from 10% to 150% and a Shore A hardness of 44A to 95A as measured at 68° F.
An airfoil comprising:
- a substrate forming a leading edge surface covered by a coating composition formed by an isocyanate-terminated prepolymer with an isocyanate content of about 0.5 to about 40 weight percent, based on the weight of the prepolymer;
- reacted with a polyol curing agent;
- said composition in dry cured form having tensile strength from 1000 psi (70 kg/cm2) to 7233 psi (508 kg/cm2), an elongation at break greater from 350% to 1250%, a tensile set after break from 10% to 150%, and a Shore A hardness of 44A to 95A as measured at 68° F., said coating composition protecting the leading edge substrate against liquid and solid particle erosion.
An airfoil comprising:
- a substrate forming a leading edge surface covered by a coating composition formed by an isocyanate-terminated prepolymer with an isocyanate content of about 0.5 to about 40 weight percent, based on the weight of the prepolymer;
- reacted with a curing agent selected from the group consisting of polyaspartic esters, aldimines, ketimines, amines and mixtures thereof with the proviso that ketamine is not derived from methylene dianiline;
- said composition in dry cured form having tensile strength from 1000 psi (70 kg/cm2) to 7233 psi (508 kg/cm2), an elongation at break greater from 350% to 1250%, a tensile set after break from 10% to 150%, and a Shore A hardness of 44A to 95A as measured at 68° F., said coating composition protecting the leading edge substrate against liquid and solid particle erosion.
An airfoil comprising:
- a substrate forming a leading edge surface covered by a coating composition formed by an isocyanate-terminated prepolymer with an isocyanate content of about 0.5 to about 40 weight percent, based on the weight of the prepolymer;
- reacted with a curing agent comprising one or more polyols and a second curative selected from the group consisting of polyaspartic esters, ketimines, aldimines, amines and mixtures thereof;
- said composition in dry cured form having tensile strength from 1000 psi (70 kg/cm2 to 7233 psi (508 kg/cm2), an elongation at break greater from 350% to 1250%, a tensile set after break from 10% to 150%, and a Shore A hardness of 44A to 95A as measured at 68° F., said coating composition protecting the leading edge substrate against liquid and solid particle erosion.
An airfoil comprising:
- a substrate forming a leading edge surface covered by a coating composition formed by an isocyanate-terminated prepolymer with an isocyanate content of about 0.5 to about 40 weight percent, based on the weight of the prepolymer;
- reacted with a curing agent selected from the group consisting of
- polyester polyols, polycaprolactone polyols, polyether polyols, polyhydroxy polycarbonates, polyhydroxy polyacetals, polyhydroxy polyacrylates, polyhydroxy polyester amides and polyhydroxy polythioethers or mixtures thereof, and mixtures thereof;
- said composition in dry cured form having tensile strength from 1000 psi (70 kg/cm2) to 7233 psi (508 kg/cm2), an elongation at break greater from 350% to 1250%, a tensile set after break from 10% to 50%, and a Shore A hardness of 44A to 95A as measured at 68° F., said coating composition protecting the leading edge substrate against liquid and solid particle erosion.
1 more element
An airfoil comprising:
- a substrate forming a leading edge surface covered by a coating composition formed by an isocyanate-terminated prepolymer with an isocyanate content of about 0.5 to about 40 weight percent, based on the weight of the prepolymer;
- reacted with a, a polyether polyol, said composition in dry cured form having tensile strength from 1000 psi (70 kg/cm2 to 7233 psi (508 kg/cm2), an elongation at break greater from 350% to 1250%, a tensile set after break from 10% to 150%, and a Shore A hardness of 44A to 95A as measured at 68° F., said coating composition protecting the leading edge substrate against liquid and solid particle erosion.
An airfoil comprising:
- a substrate forming a leading edge surface covered by a coating composition formed by an isocyanate-terminated prepolymer with an isocyanate content of about 0.5 to about 40 weight percent, based on the weight of the prepolymer;
- reacted with a curing agent consisting of a polyol and a second curative selected from the group consisting of polyaspartic esters, aldimines, ketimines, amines and mixtures thereof;
- said composition in dry cured form having tensile strength from 1000 psi (70 kg/cm2) to 7233 psi (508 kg/cm2), an elongation at break greater from 350% to 1250%, a tensile set after break from 10% to 150%, and a Shore A hardness of 44A to 95A as measured at 68° F., said coating composition protecting the leading edge substrate against liquid and solid particle erosion.
Dependencies are inferred from the claim text.