A photocurable sealing material comprising at least a polythiol compound as a first component, wherein, in the case where the photocurable sealing material is used to produce two sheets having a thickness of 1 mm, a width of 25 mm, and a length of 200 mm, the two sheets are photocured by irradiation with an ultraviolet ray, then the photocured sheets are laminated, and the laminate is subjected to a load of 10 kg for 10 seconds, an action of causing the lamination interface between the two sheets to disappear is exhibited, and the self-adhesion strength in a T-type peel test is 5 N/25 mm or more when the sheets are pulled at a peel speed of 300 mm/min.

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.

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.

A system for customization of a photochromic article (14) includes a container (12) having an interior (28). At least one actinic radiation source (34) is located in the interior (28) of the container (12). At least one deactivation radiation source (36) is located in the interior (28) of the container (12). A method of customizing a photochromic article (14) includes inserting a photochromic article (14) having at least one non-thermally reversible photochromic material into a container (12) having at least one actinic radiation source (34) and actuating the at least one actinic radiation source (34) to activate the at least one non-thermally reversible photochromic material.

A photocurable sealing material comprising at least a polythiol compound as a first component, wherein, in the case where the photocurable sealing material is used to produce two sheets having a thickness of 1 mm, a width of 25 mm, and a length of 200 mm, the two sheets are photocured by irradiation with an ultraviolet ray, then the photocured sheets are laminated, and the laminate is subjected to a load of 10 kg for 10 seconds, an action of causing the lamination interface between the two sheets to disappear is exhibited, and the self-adhesion strength in a T-type peel test is 5 N/25 mm or more when the sheets are pulled at a peel speed of 300 mm/min.

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.

The present invention relates to a sealing compound for coating a substrate, which is a mixture of a predominantly uncured base mass and a curing agent containing at least one epoxy composition, wherein the base mass contains a mercapto-terminated base polymer based on polyether, polythioether, polythioethersulfide, polysulfide, copolymers thereof and/or mixtures thereof, wherein the base mass, the curing agent or both contain at least one photoinitiator based on a sterically hindered nitrogen-containing organic base, and, through the effects of high-energy actinic radiation, the at least one photoinitiator dissociates at least one radical per molecule based on a nitrogen-containing organic base, from which a nitrogen-containing organic base having a pKa value of the conjugated acid in the region of 6 to 30 is formed, which acts as an active catalyst for the curing of the base mass. The present invention also relates to a corresponding method for coating a substrate with a sealing compound.

The present invention aims to provide a curable resin composition excellent in surface curability and deep curability by irradiation with active energy rays such as ultraviolet rays while maintaining sealability. The present invention provides a curable resin composition including the following ingredients (A) to (D): ingredient (A): a polymer which has one or more (meth)acryloyl groups and has a polyisobutylene backbone containing a [CH2C(CH3)2]- unit, ingredient (B): a radical polymerization initiator, ingredient (C): a triarylphosphine or a triarylphosphine derivative, and ingredient (D): xanthone or a xanthone derivative.

The invention relates to a method of sealing, coating or/and aerodynamic smoothing of at least one connecting element that protrudes from a surface or/and for sealing, coating or/and aerodynamic smoothing of a surface at a gap or at an uneven connection site with a sulfur-containing SCOD sealing compound at at least one application site, especially on an aerospace component, with at least one nozzle element and with at least one irradiation unit, which is characterized in that i) a nozzle element contains a mixed sealing compound and is guided or/and mounted over the connecting element protruding from a surface, over the gap or/and over the uneven connection site, ii) the connecting element protruding from the surface, the gap or the uneven connection site is covered fully with sealing compound, the sealing compound forming a sealing compound cover essentially in the form of a sealing compound cap, a coating or/and a mound-shaped or bead-shaped elevation, iii) the nozzle element or at least a portion is raised if required from the surface having the sealing compound cover, and iv) the curing of the sealing compound is initiated with the aid of at least one irradiation unit by energy input and by release of a latent catalyst or is brought about by direct activation of at least one reaction component, such that the mixed sealing compound subsequently cures or/and cures further. The invention also relates to a corresponding apparatus, to the aerospace vehicle treated in this way and to the use of the method and the apparatus.

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.