Abstract: A two-part curable composition comprises: a Part A component comprising polythiol having a thiol group functionality of at least two, and tertiary amine accelerator; and a Part B component comprising polyene comprising at least two of non-aromatic C—C double bonds, C—C triple bonds, or a combination thereof and organic peroxide curative. At least one of the polythiol or the polyene comprises a respective reaction product of reaction components comprising: HSR1O(CH2CHR2O)aR1SH wherein each R1 independently represents an alkyl group having from 2 to 12 carbon atoms, each R2 independently represents H or CH3, and a represents an integer from 1 to 20; triallyl isocyanurate; H2?CHOR1O(CH2CHR2O)aR1OCH?CH2; and. A method of making a curable composition comprises combining the Part A and Part B components of the two-part curable composition. Methods of sealing a substrate and adhering two substrates, and articles made thereby are also disclosed.

Abstract: Methods for making structural shims (220) for the mating assembly of parts, such as for installation between a skin (212) and substructure (214) of an aircraft. The methods include the steps of disposing a hardenable composition (216) into a gap between the first (212) and second parts (214), hardening the hardenable composition to provide a shim pattern (218) that is dimensionally stable, and removing the shim pattern from the gap without damage. The shim pattern can be used to provide a digital model thereof, which can in turn be used to fabricate the structural shim (220).

Abstract: Compositions that are curable to polythioether polymers are provided, comprising: a) a dithiol monomer; b) a diene monomer; c) a radical cleaved photoinitiator; d) a peroxide; and e) an amine; where the peroxide and amine together are a peroxide-amine redox initiator. In some embodiments, the amine is a tertiary amine. In some embodiments, the amine is selected from the group consisting of dihydroxyethyl-p-toluidine, N,N-diisopropylethylamine, and N, N, N?, N?, N?-pentamethyl-diethylenetriamine. In some embodiments, the peroxide is selected from the group consisting of di-tert-butyl peroxide, methyl ethyl ketone peroxide, and benzoyl peroxide. In some embodiments, the composition may additionally comprise a polythiol monomer having three or more thiol groups.

Abstract: A composition includes a polythiol having more than one thiol group, a polyepoxide having more than one epoxide group, a polymer comprising a tertiary amine group and a hydroxyl group, and conductive filler. A polymer network, which can be prepared from the composition, a method for making the polymer network, a method of making a battery module, and a battery module including the composition are also disclosed.

Abstract: A composition includes a polythiol having more than one thiol group, a polyepoxide having more than one epoxide group, an amine catalyst, and conductive filler. The conductive filler is at least one of thermally conductive or electrically conductive. The conductive filler is present in an amount to provide a thermal conductivity of at least 0.95 W/m?K, and/or the conductive filler is present in an amount of greater than 80 percent by weight, based on the total weight of the composition. A polymer network, which can be prepared from the composition, and a method for making the polymer network are also disclosed.

Abstract: The present disclosure provides a polymeric material including a polymerized reaction product of a polymerizable composition including components and has a solids content of 90% or greater. The components include a uretdione-containing material including a reaction product of a diisocyanate reacted with itself; a first hydroxyl-containing compound; an optional second hydroxyl-containing compound having a single OH group; an epoxy component; and an accelerator. The first hydroxyl-containing compound has more than one OH group and the optional second hydroxyl-containing compound is a primary alcohol or a secondary alcohol. The present disclosure also provides a two-part composition, in which a polymeric material is included in the first part and the second part includes at least one thiol-containing compound.

Abstract: Curable sealant compositions comprise the components: a) x weight percent of at least one polythiol; b) y weight percent of at least one unsaturated compound having at least two non-aromatic carbon-carbon double bonds, at least one carbon-carbon triple bond, or a combination thereof; c) from 0.01 to 8 weight percent of at least one quaternary ammonium or phosphonium salt; d) from 0.05 to 10 weight percent of at least one organic peroxide; and e) optionally from 0.01 to 10 weight percent of a photoinitiator system capable of generating free radicals upon exposure to actinic radiation. Each of x and y represents a positive real number. The sum x+y is in the range of 72 to 99. The weight percent ranges of the components a)-e) are based on the total weight of the components a)-e). A seal cap including the curable sealant composition and methods of making and using the curable sealant compositions are also disclosed.

Abstract: A composition includes a photolatent amine, camphorquinone, and a coumarin sensitizer. The coumarin sensitizer is triplet photosensitizer and has an absorbance with a wavelength of maximum absorbance in a range from 390 nanometers to 510 nanometers. Compositions that further include a polymerizable material are also disclosed. Polymer networks preparable from such compositions and methods for making the polymer networks are also disclosed.

Abstract: The composition includes a first amino-functional silane including an amino group and a silane group, in which the amino group and the silane group are connected by an organic linking group, and a second amino-functional silane including a secondary or tertiary amino group and least two independently selected silane groups, in which the secondary or tertiary amino group is connected to each of the two independently selected silane groups by organic linking groups. The first amino-functional silane can be a polyamino-functional silane having at least two amino groups and a silane group in which at least one of the amino groups and the silane group are connected by an organic linking group. The composition can include a photoluminescent compound exhibiting photoluminescence at an excitation wavelength above 400 nanometers. Use of the composition as an adhesion promoter and a method including applying the composition to a substrate surface are also disclosed.

Abstract: A composition is described comprising an amine-reactive material; and a polymeric catalyst comprising hydroxyl groups and tertiary amine groups. The polymeric catalyst is typically suspended or dispersed in a liquid dispersant. The liquid dispersant does not covalently bond with the tertiary amine groups. The liquid dispersant is typically a hydroxy-functional or thiol-functional. Also described is a polymer network comprising the cured composition described herein, a polymer catalyst, and catalyst dispersion; as well as methods.

Abstract: Disclosed is a curable composition and cured products thereof. The curable composition includes a vinyl polysiloxane component, a hydrogen polysiloxane component, a polymerization catalyst, and an expandable graphite component comprising moisture. Cured products of the curable composition include foamed cells having a uniform size and distribution in the cured product. This can help to increase the water proofing and flame retardant properties of the cured product.

Abstract: Various embodiments disclosed relate to a shim pattern. The shim pattern includes a release film. The shim pattern further includes a curable composition disposed on the release film. There are various advantages to using the shim pattern disclosed herein. For example, according to various embodiments, the shim pattern can be used to easily produce a model of a gap between two components of an aircraft (e.g., an airplane, helicopter, drone, or spacecraft) that can be used to form a shim to close the gap.

Abstract: A composition including a polythiol having more than one thiol groups, a polyepoxide having more than one epoxide group, a photolatent base catalyst that can photochemically generate a first amine, and a second amine phase-separated within the composition. A polymer network preparable from the composition, and a method for making the polymer network are also disclosed.

Abstract: Provided are articles, along with related methods, capable of providing an effective adhesive bond to a substrate containing polyetherketoneketone. The multilayered article includes a substrate comprising polyetherketoneketone, an adhesion promoter disposed on the substrate, the adhesion promoter comprising at least one of organotitanate, polyamide, surface-treated nanosilica, ammosilane or epoxy silane, and an adhesive bonded to the adhesion promoter. The adhesive contains at least one of an acrylic polymer, a polysulfide, a polythioether, an epoxy resin, or a silicone resin.

Abstract: A dual curable thiol-ene composition comprising a polythiol, an unsaturated compound, a photoinitiator, an organic hydroperoxide (thermal initiator) and optionally a nitrogen-containing base, such as e.g. an N-heterocyclic compound (together with the organic hydroperoxide a redox initiator system). A cross-linked polymer prepared therefrom. A method of making such a polymer. A cured sealant comprising such a polymer. The sealant is preferably for use in aerospace.

Abstract: A lightning protective seal cap comprising a seal cap that defines an interior, and a quantity of an uncured sealant that is curable by the application of actinic radiation so as to bind the seal cap to a fastener. The interior of the seal cap contains the quantity of uncured sealant, the seal cap is positionable over the fastener such that at least a portion of the fastener resides in the interior of the seal cap, and when the seal cap is in position over the fastener, the sealant containing seal cap prevents electrical arcing to the fastener from a lightning strike.

Abstract: Curable sealant compositions comprise the components: a) x weight percent of at least one polythiol; b) y weight percent of at least one unsaturated compound having at least two non-aromatic carbon-carbon double bonds, at least one carbon-carbon triple bond, or a combination thereof; c) from 0.01 to 8 weight percent of at least one organoborane-amine complex; d) from 0.05 to 10 weight percent of at least one organic peroxide; and e) from 0.01 to 10 weight percent of a photoinitiator system capable of generating free radicals upon exposure to actinic radiation. Each of x and y represents a positive real number. The sum x+y is in the range of 72 to 99. The weight percent ranges of the components a)-e) are based on the total weight of the components a)-e). A seal cap including the curable sealant composition and methods of making and using the curable sealant compositions are also disclosed.

Abstract: A lightning protective seal cap comprising a seal cap that defines an interior, and a quantity of an uncured sealant that is curable by the application of actinic radiation so as to bind the seal cap to a fastener. The interior of the seal cap contains the quantity of uncured sealant, the seal cap is positionable over the fastener such that at least a portion of the fastener resides in the interior of the seal cap, and when the seal cap is in position over the fastener, the sealant containing seal cap prevents electrical arcing to the fastener from a lightning strike.

Abstract: Provided are sealant compositions that include a first component and second component. The first component contains a polysulfide, a polythioether, or a copolymer or combination thereof containing pendant or terminal thiol groups, while the second in component contains an ethylenically-unsaturated compound and either the first or second component further contains a photoinitiator. Alternatively, the second component can contain a polyepoxide and either the first or second component can contain a photolatent base and a photosensitizer. The first or second component further contains a colorant that substantially reflects or substantially transmits light over the wavelength range from 350 nm to 500 nm. These compositions can provide cure-on-demand sealant formulations that comply with Class B sealant regulations on color, provide an acceptable depth of cure, and allow two-part mixing to be easily distinguishable.

Abstract: The present disclosure provides methods and articles useful in sealing fasteners, including seal caps and methods of their use, and in particular light weight seal caps having higher dielectric breakdown strength, lower weight, and/or lower wall thickness. In some embodiments, the seal caps according to the present invention are made of a material having a dielectric breakdown strength of greater than 1.0 kV/mm, in some embodiments greater than 15.0 kV/mm, and in some embodiments greater than 50.0 kV/mm. In some embodiments, the seal caps according to the present invention are thin-walled, having an average wall thickness of less than 1.5 mm and in some embodiments less than less than 0.5 mm. In some embodiments, the seal cap comprises a polyurethane polymer, a polythioether polymer, a polysulfide polymer, a fluorinated thermoplastic polymer, a THV polymer, a fluorinated thermoset polymer, an engineering thermoplastic, and/or a PEEK polymer.