Abstract: Actinic radiation-curable compositions containing polythiols and urethane/urea-containing polyalkenyl prepolymers that can be used for aerospace coatings and sealants. The coatings can be applied to surfaces and rapidly cured.

Abstract: Methods of fabricating wind turbine blades, leading edge protection surfaces of wind turbine blades and wind turbine protection shields using coreactive additive manufacturing. The blades, surfaces (605), and protection shields can include a single layer or multiple layers of a cured composition applied using coreactive manufacturing such as three-dimensional printing. Methods of repairing leading edge (601) surfaces of wind turbine blades include applying one or more layers of a coreactive composition onto the damaged leading edge surfaces using coreactive additive manufacturing or applying a leading edge protection shield onto a damaged leading edge (601) of a wind turbine blade.

Abstract: Methods of fabricating seal caps using three-dimensional printing are disclosed. The seal caps are useful for sealing fasteners.

Abstract: Methods of making multilayer systems comprising a sealant layer by extruding a coreactive sealant composition are disclosed. The methods can be used to fabricate multilayer systems in which individual layers have different cured properties. Individual layers can also have an inhomogeneous concentration of one or more constituents within a layer. The multilayer systems can be made using three-dimensional printing that facilitate the use of a wide range of coreactive compositions.

Abstract: Sulfur-containing poly(alkenyl) ethers can be incorporated into the backbone of polythioether prepolymers and can be used as curing agents in thiol-terminated polythioether prepolymer compositions. Cured sealants prepared using compositions containing sulfur-containing poly(alkenyl) ether-containing polythioether prepolymers and/or sulfur-containing poly(alkenyl) ether curing agents exhibit improved physical properties suitable for use in aerospace sealant applications.

Abstract: Compositions that are resistant to hydraulic fluid and aviation fuel contain sulfur-containing prepolymers and solvent-resistant organic fillers. The compositions are useful in aerospace sealant applications.

Abstract: Dual cure compositions include a combination of an organoborane complex and a radical oxidizing agent as co-catalysts. The compositions are curable under dark conditions and can be used to catalyze thiol-ene reactions. The compositions are useful as sealants.

Abstract: Chemically resistant sealant compositions include high equivalent weight sulfur-containing prepolymers. Upon exposure to chemicals the properties of sealants prepared using the prepolymers exhibit excellent fuel and phosphate ester resistance.

Abstract: Actinic radiation-curable compositions containing polythiols and urethane/urea-containing polyalkenyl prepolymers that can be used for aerospace coatings and sealants. The coatings can be applied to surfaces and rapidly cured.

Abstract: Actinic radiation-curable compositions containing polythiols and urethane/urea-containing polyalkenyl prepolymers that can be used for aerospace coatings and sealants. The coatings can be applied to surfaces and rapidly cured.

Abstract: Disclosed are methods for making a cured sealant. The methods include depositing an uncured sealant composition on a substrate and exposing the uncured sealant composition to actinic radiation to provide a cured sealant. The uncured sealant composition includes a thiol-terminated polythioether, a polyene comprising a polyvinyl ether and/or a polyallyl compound, and a hydroxy-functional vinyl ether. Related sealant compositions are also disclosed.

Abstract: Dual cure compositions include a combination of an organoborane complex and a radical oxidizing agent as co-catalysts. The compositions are curable under dark conditions and can be used to catalyze thiol-ene reactions. The compositions are useful as sealants.

Abstract: Chemically resistant sealant compositions include high equivalent weight sulfur-containing prepolymers. Upon exposure to chemicals the properties of sealants prepared using the prepolymers exhibit excellent fuel and phosphate ester resistance.

Abstract: Compositions that are resistant to hydraulic fluid and aviation fuel contain sulfur-containing prepolymers and solvent-resistant organic fillers. The compositions are useful in aerospace sealant applications.

Abstract: Compositions that are resistant to hydraulic fluid and aviation fuel contain sulfur-containing prepolymers and solvent-resistant organic fillers. The compositions are useful in aerospace sealant applications.

Abstract: Hydroxyl-containing bis(alkenyl) ethers can be incorporated into the backbone of polythioether prepolymers and can be used as curing agents in thiol-terminated polythioether prepolymer compositions. Cured sealants prepared using compositions containing hydroxyl-containing bis(alkenyl) ether-containing polythioether prepolymers and/or hydroxyl-containing bis(alkenyl) ether curing agents exhibit improved physical properties such as rapid curing and compatibility with fillers suitable for use in aerospace sealant applications.

Abstract: Sulfur-containing poly(alkenyl) ethers can be incorporated into the backbone of polythioether prepolymers and can be used as curing agents in thiol-terminated polythioether prepolymer compositions. Cured sealants prepared using compositions containing sulfur-containing poly(alkenyl) ether-containing polythioether prepolymers and/or sulfur-containing poly(alkenyl) ether curing agents exhibit improved physical properties suitable for use in aerospace sealant applications.

Abstract: Urethane/urea-containing bis(alkenyl) ethers can be incorporated into the backbone of polythioether prepolymers and can be used as curing agents in thiol-terminated polythioether prepolymer compositions. Cured sealants prepared using compositions containing urethane/urea-containing bis(alkenyl) ether-containing polythioether prepolymers and/or urethane/urea-containing bis(alkenyl) ether curing agents exhibit improved physical properties suitable for use in aerospace sealant applications.

Abstract: Disclosed are methods for making a cured sealant. The methods include depositing an uncured sealant composition on a substrate and exposing the uncured sealant composition to actinic radiation to provide a cured sealant. The uncured sealant composition includes a thiol-terminated polythioether, a polyene comprising a polyvinyl ether and/or a polyallyl compound, and a hydroxy-functional vinyl ether. Related sealant compositions are also disclosed.

Abstract: Actinic radiation-curable compositions containing polythiols and urethane/urea-containing polyalkenyl prepolymers that can be used for aerospace coatings and sealants. The coatings can be applied to surfaces and rapidly cured.