Abstract: Polymerizable compositions for use in or as adhesives, sealants and/or coatings are disclosed herein. The compositions include a (meth)acrylate component together with a dye substantially dissolved in the (meth)acrylate component which imparts a first color to the (meth)acrylate component. Upon curing, a resultant cured composition has a second color. The invention also relates to a method of detecting substantially full cure of the polymerization of the compositions.

Abstract: This invention relates to epoxidized acetals and thioacetals, episulfidized acetals and thioacetals, thermosetting resin compositions based on such epoxidized acetals and thioacetals, episulfidized acetals and thioacetals, reaction products of which are controllably degradable when subjected to appropriate conditions.

Abstract: This invention relates to a visible light or UV/visible light and anaerobically curable composition for encapsulating the surface of the primer mix disposed in the primer cup, particularly for use in center fire ammunition.

Abstract: The present invention relates generally to conductive, silicone-based compositions, with improved initial adhesion and reduced micro-voiding. More specifically, the present invention relates to a conductive, silicone-based composition, which includes a polyorganosiloxane, a silicone resin, and a conductive filler component.

Abstract: In accordance with the present invention, it has been discovered that the addition of organic acids provides improved performance properties to curable compositions, e.g., improved flux compatibility, improved flow properties, improved voiding properties, and the like. Accordingly, there are provided curable compositions having improved performance properties, methods for the preparation thereof, and methods employing same. Also provided are novel articles prepared using invention compositions.

Abstract: A UV spot curing lamp assembly comprises an integral filter support and shutter stop mechanism. The assembly includes a UV lamp and a light guide spaced therefrom for receiving filtered light from the lamp and for directing light through the light guide to a selected target or work site for curing materials thereat. A filter plate in the form of a borosilicate glass, having a selected thickness for the particular application, is disposed in relatively close proximity to the entrance surface of the light guide. A movable shutter plate, having an opening therethrough, is disposed between the filter and the light guide entrance surface. The shutter is movable from a first position wherein the opening is in registry with the light guide entrance surface to receive light from the lamp to a second position wherein a solid portion of the shutter plate blocks light from being received by the light guide entrance surface.

Abstract: An electromagnetic energy spot curing system is provided which utilizes a template which moves relative to a source of radiation in the electromagnetic spectrum, such as an ultraviolet (UV) lamp. A channel is formed through the template of varying widths so that during the course of relative movement, different intensities of radiation emanating from the source is continuously passed through the channel and applied to a desired location, typically a curable material.

Abstract: The invention is a nozzle assembly (3, 20) with a re-useable break off cap (20) for dispensing a product from a container (1). On a dispensing end (5) of the nozzle (3) a break-off cap (20) is integrally formed thereon and closes off the dispensing end (5) of the nozzle (3). The break-off cap (20) is removable by breaking a frangible connection (22) between the nozzle (3) and the break-off cap (20). Removing the break-off cap opens the dispensing end (5) of the nozzle (3) thereby allowing product to be dispensed through the nozzle (3). The break-off cap (20) removed from the nozzle (3) can then be re-engaged with the nozzle (3) to close off the dispensing end (5) thereby preventing further product from being dispensed. The cap can be attached to or removed from the nozzle (3) as often as a user requires. The invention also includes packaging which includes a tray (111) or pouch into which the nozzle assembly (3, 20) and container (1) can be inserted.

Abstract: This invention relates to curable epoxy-based compositions for use in the field of microelectronics, such as those having an epoxy compound which has two or more epoxy groups per molecule, optionally a polythiol compound which has two or more thiol groups per molecule, a latent hardener, and at least one solid organic acid which is substantially insoluble in a mixture of the foregoing components at room temperature. The solid organic acid may be selected from the group consisting of: aliphatic, cycloaliphatic and aromatic carboxylic acids and derivatives thereof, aliphatic, cycloaliphatic, and aromatic quinones and derivatives thereof, phenols and derivatives thereof and enolisable aliphatic, cycloaliphatic and aromatic compounds and derivatives thereof. The solid organic acid should have a pKa of less than or equal to about 12.0, desirably less than or equal to about 10, and often less than or equal to about 9.0, such as less than or equal to about 7.5.

Abstract: This invention relates generally to heat curable compositions, particularly well utilized for use as impregnation sealants curable using hydrosilation chemistry. The heat curable compositions of the present invention can be stored and shipped as a one-part composition. The composition includes at least one curable unsaturated organic component, at least one co-reactant, which has at least two functional groups reactive with the organic component, and at least one catalyst of initiating the cure of the composition.

Abstract: This invention relates to (meth)acrylate based polymerizable compositions and multipart adhesive systems prepared therefrom, which include an aziridine-containing compound in a carrier material with which the aziridine-containing compound is unreactive. The inventive composition demonstrates a flash point above 140° F., desirably above 200° F., for each of the parts of the adhesive system. To achieve the physical properties of the inventive compositions and adhesive systems, it is desirable for the carrier material to have such flash points; however, provided that in their entirety the inventive compositions and adhesive systems have such flash points, it is not necessary for the carrier material itself to have such flash points. The inventive compositions and adhesive systems also include a package for controlling the rate of cure and indicating the extent of cure.

Abstract: The present invention relates to a radiation-curable composition which includes a cyanoacrylate component or a cyanoacrylate-containing formulation, a metallocene component, a hydrogen abstraction photoinitiator, and hydrogen donor component to enhance the activity of the hydrogen abstraction photoinitiator.

Abstract: The present invention provides novel “hybrid” silyl-terminated polymers that contain at least two different reactive end-capping groups. The “hybrid” silyl-terminated polymers of the present invention are produced by a novel single multi-step end-capping reaction of at least one silanol-terminated polymer with at least two silanes in the presence of a catalyst.

Abstract: A method for sealing flexible graphite sheets formed from exfoliated graphite particles is provided. A textured surface is provided onto the graphite sheet to facilitate the infusion of a sealant into the internal pores of the sheet.

Abstract: A composition including at least one anaerobically polymerizable compound; and at least one condensation product of an aldehyde and or ketone/with a polyol. The invention also provides a composition as described above which is in the form of a soft solid, for example, in the form of a stick. A two-part composition is provided, comprising a first part containing at least one polymerizable compound; and a second part containing at least one curing component for polymerizing the composition, wherein at least one of the first or second parts additionally comprises at least one gelling or solidifying agent. A kit is provided comprising the composition according to the invention which includes at least one primer component and at least one carrier solvent for the primer component, and a second composition which includes at least one anaerobically polymerizable compound and at least one condensation product of an aldehyde and or ketone/with a polyol.

Abstract: Metal alkyl borohydrides are used as initiators of polymerisation, particularly in adhesive compositions for bonding a wide range of substrates including low surface energy substrates such as polyolefins. As described, the metal alkyl borohydrides are of the formula I or II. wherein R1 is C1-C10 alkyl, R2 and R3, which may be the same or different, are H, D, C1-C10 alkyl or C3-C10 cycloalkyl, phenyl, or phenyl-substituted C1-C10 alkyl or C3-C10 cycloalkyl, provided that any two of R1-R3 may optionally be part of a carbocyclic ring, and M+ is a metal ion. In particular, alkali metal trialkyl borohydrides are used, the alkali metal salt being selected from: Lithium triethylborohydride, Sodium triethylborohydride, Potassium triethylborohydride, Lithium tri-sec-butylborohydride, Sodium tri-sec-butylborohydride, Potassium tri-sec-butylborohydride, and Lithium triethylborodeuteride. Other exemplified compounds which are less effective on low surface energy substrates include Lithium 9-borabicyclo [3.3.

Abstract: The invention provides a reaction product derived from an epoxy-functional acrylic monomer and an alkylaminoalkylene polyalkoxysilane or from a reaction product derived from acrylic acid and an epoxidized polyalkoxysilane.

Abstract: Heat-curable silicone compositions employing a reactive silicone, a silicone hydride crosslinker and a catalyst system which includes a rhodium-based catalyst, a stabilizing system are disclosed. A combination of rhodium and platinum-based catalysts are employed as well. The compositions are low temperature curing and are capable of providing low coefficient of thermal expansion compositions. A stabilizer system which includes in combination a peroxide and an acetylenic compound is also disclosed.

Abstract: This invention relates to cyanoacrylate-containing compositions that include, in addition to the cyanoacrylate component, certain accelerators to improve fixture speeds on certain substrates.

Abstract: The present invention provides a new class of materials effective as cure accelerators for anaerobic curable compositions. The addition of these materials into anaerobic adhesives as a replacement for conventional curatives, such as acetyl phenyl hydrazine and maleic acid or toluidines, surprisingly provides at least comparable cure speeds and physcial properties for the reaction products formed therefrom.