Abstract: Disclosed are polyurea compositions comprising the reaction products of a polyformal-isocyanate prepolymer and a curing agent comprising an amine. The compositions are useful as sealants in aerospace applications.

Abstract: One-part moisture curable sealant compositions and methods of making the same are provided. The compositions include a silyl-functional polythioether and a polyepoxide. Methods of making sealant compositions are also provided.

Abstract: Disclosed are thioethers, methods for preparing such thioethers, and curable compositions, such as coating and sealant compositions, that include such thioethers. The thioethers can be the reaction product of (a) an alpha, omega dihalo organic compound, (b) a metal hydrosulfide, and (c) a metal hydroxide.

Abstract: Disclosed are thioethers, methods for preparing such thioethers, and curable compositions, such as coating and sealant compositions, that include such thioethers. The thioethers can be the reaction product of (a) an alpha, omega dihalo organic compound, (b) a metal hydrosulfide and (c) a metal hydroxide.

Abstract: Disclosed are methods for applying and curing a multilayer coating on a substrate. The methods include applying to an aluminum substrate a primer composition, coalescing the composition to form a substantially continuous film over the substrate, exposing the film to radiation to cure the film, applying a second composition to the cured film, coalescing the second composition to form a substantially continuous second film, and curing the second film. The primer composition includes a polyene and a polythiol.

Abstract: Embodiments of the present disclosure are directed to sealant compositions comprising a base composition comprising at least one sulfur-containing polymer, and an electrically conductive filler comprising carbon nanotubes and conductive carbon black; and a curing agent composition. The sealant compositions are substantially Ni-free, are particularly useful in lightning strike applications, and exhibit unexpectedly superior tensile elongation and low specific gravity.

Abstract: Disclosed are sulfur-containing polyurea compositions and methods of using the compositions as sealants, particularly as low specific-gravity aerospace sealants.

Abstract: Embodiments of the present disclosure are directed to sealant compositions including a base composition with at least one sulfur-containing polymer, a curing agent composition, and an electrically conductive filler including carbon nanotubes and stainless steel fibers. The electrically conductive filler can be in either or both of the base composition and the curing agent composition. The sealant compositions are substantially Ni-free and exhibit unexpectedly superior EMI/RFI shielding effectiveness.

Abstract: Disclosed are flexible polyamines, flexible amine-terminated polyformal adducts, flexible-amine-terminated polythioether adducts, compositions comprising flexible polyamines and isocyanate-terminated prepolymers, and compositions comprising flexible amine-terminated adducts and isocyanate-terminated prepolymers. Uses of the compositions as sealants, and particularly as aerospace sealants, are also disclosed.

Abstract: A coating/sealant system that includes a coating and a sealant deposited over at least a portion of the coating, in which the coating includes a reaction product formed from reactants comprising a phosphated epoxy resin and a curing agent, and the sealant includes a sulfur-containing polymer.

Abstract: A coating/sealant system that includes a coating and a sealant deposited over at least a portion of the coating, in which the coating includes a reaction product formed from reactants comprising a phosphated epoxy resin and a curing agent, and the sealant includes a sulfur-containing polymer.

Abstract: Coating compositions are disclosed that include corrosion resisting particles such that the coating composition can exhibit corrosion resistance properties. Also disclosed are substrates at least partially coated with a coating deposited from such a composition and multi-component composite coatings, wherein at least one coating later is deposited from such a coating composition. Methods and apparatus for making ultrafine solid particles are also disclosed.

Abstract: Polymers are disclosed that include a structure having the formula wherein, R1 is independently selected from a C2-10 n-alkylene group, a C2-6 branched alkylene group, a C6-8 cycloalkylene group, a C6-10 alkylcycloalkylene group, —[(—CH2—)p—X—]q—(—CH2—)r—, or —[(—CH2—)p—X—]q—(—CH2—)r—, wherein at least one —CH2— unit is substituted with a methyl group, wherein p is an integer having a value ranging from 2 to 6, q is an integer having a value ranging from 1 to 5, r is an integer having a value ranging from 2 to 10, and X is selected from O, S, and —NR—, wherein R is hydrogen or methyl; R2 denotes a structure derived from allyl (meth)acrylate or a multi-functional (meth)acrylate; R3 is independently selected from hydrogen and an alkyl group; n is an integer having a value ranging from 1 to 60; and m is a rational number having a value ranging from 0 to 10.

Abstract: Magnesium hydroxide particles having a particle size of less than 200 nm and corrosion resisting properties are disclosed. Also disclosed are suspensions and powders that include the corrosion resisting particles. Coating compositions that include the corrosion resisting particles such that the coating composition can exhibit corrosion resistance properties, and substrates at least partially coated with a coating deposited from such a composition and multi-component composite coatings, wherein at least one coating layer is deposited from such a coating composition, are also disclosed.

Abstract: Disclosed are polyurea compositions comprising the reaction products of a polyformal-isocyanate prepolymer and a curing agent comprising an amine. The compositions are useful as sealants in aerospace applications.

Abstract: Disclosed are multifunctional sulfur-containing polymers that are the reaction products of a sulfur-containing diol, a polyol containing at least three hydroxyl groups per polyol molecule, and an aldehyde, a ketone, or a combination thereof. Sealant compositions comprising the multifunctional sulfur-containing polymers are also disclosed.

Abstract: Disclosed are terminal-modified difunctional sulfur-containing polymers that are the reaction products of a sulfur-containing diol, an aldehyde or a ketone, and a compound containing a functional group. Compositions comprising the terminal-modified difunctional sulfur-containing polymers useful as sealants are also disclosed.

Abstract: Disclosed are reduced density coating compositions and articles, such as aerospace vehicles, at least partially coated with an opaque coating deposited from such compositions. The reduced density coating compositions include low density microspheres comprising a core and a solid opacifying coating covering a surface of the core.

Abstract: A multi-component coating spray application system comprises: a source of a first coating component, a source of a second coating component, a dynamic mixer in fluid flow communication with the sources of the first and second coating components, wherein the dynamic mixer comprises a mixing chamber and a movable stirring member in the mixing chamber, and a spray gun in fluid flow communication with an outlet port of the dynamic mixer.

Abstract: One-part moisture curable sealant compositions and methods of making the same are provided. The composition includes a silane-terminated polythioether component and a catalyst. The silane-terminated polythioether component and catalyst are isolated from moisture to prevent curing. The composition is stable against curing at ambient temperature and under conditions substantially free of moisture. When the composition is applied to a substrate and exposed to moisture, the composition cures to form a sealant. A method of making a sealant composition includes reacting a mercapto-terminated polythioether with a compound having a silane group to form a silane-terminated polythioether. The silane-terminated polythioether is then combined with a catalyst and isolated from moisture to prevent curing. Lastly, the composition is applied to a substrate and exposed to moisture which allows the composition to cure to form a sealant.