Abstract: A heat-curable structural adhesive includes at least one non-rubber-modified epoxy resin; an optional rubber or toughener, one or more epoxy curing agents, one or more epoxy curing catalysts; and a flame retardant mixture that includes (i) alumina trihydrate, (ii) zinc borate and (iii) melamine or a melamine derivative. The structural adhesive is useful for bonding metals to other materials or metals to other metals. The structural adhesive strongly resists ignition when welding is performed in the presence of the uncured material, and does not interfere significantly with weld performance.

Abstract: A heat-curable structural adhesive includes a non-rubber-modified epoxy resin, a reaction product of a carboxyl- or amine-terminated butadiene polymer or copolymer and a bisphenol F-based epoxy resin, a elastomeric toughener containing capped isocyanate groups, one or more epoxy curing agents a moisture scavenger and a heat activatable catalyst comprising a mixture of a solid or liquid tertiary amine compound that has a boiling temperature of at least 130° C. and a novolac resin. The structural adhesive develops excellent bonding properties when cured at moderate temperatures, especially from 120 to 170° C., and in addition performs very well in environmental aging stress testing. The adhesive is particularly good for bonding aluminum to another metal, or bonding aluminum to aluminum.

Abstract: A one-component epoxy composition containing a latent catalyst and with surprisingly long storage stability. The catalyst being a reaction product of at least one tertiary amine compound and at least one polymer having at least one carboxylic acid and/or anhydride group.

Abstract: A composition comprising a) one or more isocyanate functional components, one or more oligomers or prepolymers containing isocyanate functional groups and alkoxysilane groups, or prepolymers having a flexible backbone and silane moieties capable of silanol condensation: b) one or more catalysts for the reaction of isocyanate moieties with active hydrogen atom containing groups or for silanol condensation; c) one or more compounds comprising a dihydrocarbyl hydroxyl amine, an alicyclic hydroxyl amine, a nitrile oxide of a dihydrocarbyl hydroxyl amine or a nitrile oxide of an alicyclic hydroxyl amine in a sufficient amount to enhance the ultraviolet stability of the composition in a cured state; and d) a pigment that does not have reinforcing properties or the composition contains one of one or more oligomers or prepolymers containing isocyanate functional groups and alkoxysilane groups, or prepolymers having a flexible backbone and silane moieties capable of silanol condensation.

Abstract: The present invention provides low polyphenols (such as bisphenol A) tougheners for epoxy adhesives. The tougheners, and adhesives comprising the tougheners exhibit enhanced viscosity stability, e.g., compared to tougheners prepared from higher amounts of bisphenol A (and epoxy adhesives comprising them).

Abstract: The invention is an adhesive composition comprising: a) an isocyanate functional polyether base prepolymers having a z molecular weight average (Mz) of about 10,000 to about 80,000 g/mole; a carbon black having an average oil absorption number of at least about 80 to at most about 400 cubic centimeters of dibutyl phthalate per 100 grams of the carbon black; (c) reactive silicon in an amount from about 0.001% to about 10% by weight of the adhesive composition; and (d) one or more catalysts for the reaction of isocyanate with hydroxyl groups. The adhesive compositions of the invention surprisingly may have improved sag performance (i.e., decreased sag) when heated, while also making them more easily pumped.

Abstract: A composition comprising: a) one or more isocyanate functional prepolymers; and b) one or more compounds containing one or more hydroperoxide groups; wherein components a) and b) are kept separate until cure is desired. The composition can be used in the form of a two part adhesive.

Abstract: A composition comprising: a) one or more isocyanate functional prepolymers; b) one or more catalysts for the reaction of isocyanate moieties with hydroxyl groups; c) one or more reinforcing fillers; and d) a stabilizing amount of one or more compounds comprising a dihydrocarbyl hydroxylamine, an alicyclic hydroxylamine, a nitrile oxide of a dihydrocarbyl hydroxylamine or a nitrile oxide of an alicyclic hydroxylamine. In another embodiment the invention is a method of bonding two or more substrates together which comprises contacting the two or more substrates together with a composition according to this invention disposed along at least a portion of the area wherein the substrates are in contact. The compositions of the invention are useful as an adhesive to bond substrates together.

Abstract: The invention is a two part polymerizable composition comprising in one part an organoboron compound capable of forming free radical generating species amine complex and in the second part one or more compounds capable of free radical polymerization and a cure accelerator comprising a) at least one compound containing a quinone structure or b) at least one compound containing at least one aromatic ring and one or more, preferably two substituents on the aromatic ring selected from hydroxyl, ether and both, where there are two substituents they are located either ortho or para with respect to one another and a peroxide containing compound. The second part may further contain an agent capable of causing the organoboron compound to form free radical generating species upon contacting the two parts. The first part may further comprises one or more compounds capable of free radical polymerization. This facilitates formulating compositions that have commercially desirable volumetric ratios of the two parts.

Abstract: Epoxy adhesive compositions contain a heat-activatable catalyst. The heat-activatable catalyst includes a tertiary amine catalyst and a novolac resin that has a weight average molecular weight of at least 3000. One-component epoxy adhesive formulations that contain the heat-activatable catalyst have unexpectedly good storage stability.

Abstract: The present invention is a composition comprising: a) one or more isocyanate functional prepolymers; b) one or more compounds containing a cycloaliphatic tertiary amine; c) one or more compounds containing a peroxide group; and d) one or more acrylate containing components. The system can be used in the form of a two part adhesive or in the form of a one part adhesive and an activator adapted to be applied to the surface of one or more of the substrates to which the adhesive is to be bonded.

Abstract: The invention is a two part polymerizable composition comprising in one part an organoboron compound capable of forming free radical generating species amine complex and in the second part one or more compounds capable of free radical polymerization and a cure accelerator comprising a) at least one compound containing a quinone structure or b) at least one compound containing at least one aromatic ring and one or more, preferably two substituents on the aromatic ring selected from hydroxyl, ether and both, where there are two substituents they are located either ortho or para with respect to one another and a peroxide containing compound. The second part may further contain an agent capable of causing the organoboron compound to form free radical generating species upon contacting the two parts. The first part may further comprises one or more compounds capable of free radical polymerization. This facilitates formulating compositions that have commercially desirable volumetric ratios of the two parts.

Abstract: One exemplary embodiment includes a method comprising polymerizing vinyl monomers with an initiator comprising a phenoxyaluminum alkyl compound in the presence of oxygen.

Abstract: The invention is an adhesive composition comprising: a) an isocyanate functional polyether base prepolymers having a z molecular weight average (Mz) of about 10,000 to about 80,000 g/mole; a carbon black having an average oil absorption number of at least about 80 to at most about 400 cubic centimeters of dibutyl phthalate per 100 grams of the carbon black; (c) reactive silicon in an amount from about 0.001% to about 10% by weight of the adhesive composition; and (d) one or more catalysts for the reaction of isocyanate with hydroxyl groups. The adhesive compositions of the invention surprisingly may have improved sag performance (i.e., decreased sag) when heated, while also making them more easily pumped.

Abstract: The invention is amido-borate compounds containing one or more anionic amido-borate moieties comprising an organoborate anion wherein the boron atom is bonded to a nitrogen atom of ammonia or an organic compound containing one or more nitrogen atoms, such as a hydrocarbyl amine, a hydrocarbyl polyamine, or an aromatic heterocycle containing one or more nitrogen atoms, and a cationic counter ion.

Abstract: The invention is a system for initiating free radical polymerization comprising: a) in one part, one or more amido-borate compounds containing one or more anionic amido-borate moieties comprising an organoborate wherein the boron atom is bonded to a nitrogen atom of ammonia or an organic compound containing one or more nitrogen atoms, such as a hydrocarbyl amine, a hydrocarbyl polyamine, or an aromatic heterocycle containing one or more nitrogen atoms and optionally containing one or more heteroatoms or heteroatom containing functional moieties, and one or more cationic counter ions and b) in a second part, a liberating compound which reacts with the nitrogen atom(s) bound to the boron atom(s) upon contact with the amido-borate to form an organoborane radical.

Abstract: An organoborane complex is disclosed. The complex includes a blocking agent comprising a bifunctional Lewis base. The blocking agents include an amine group and a second functional group that has a lower Lewis basicity than the first functional group. The blocking is based on amino alkyl pyridines.

Abstract: The invention is a two part polymerizable composition comprising in one part an organoboron compound capable of forming free radical generating species and in the second part one or more compounds capable of free radical polymerization and from about 20 to about 30 parts by weight based on the weight of the second part of i) a halogenated polyolefin having halosulfonyl groups or ii) a mixture of a halogenated polyolefin and an organic sulfonyl halide. The second part may further contain a compound capable of causing the organoboron compound to form free radical generating species upon contacting the two parts. The first part may further comprise one or more compounds capable of free radical polymerization.

Abstract: In one embodiment the invention is a system and method for bonding parts to an engine or a transmission which comprises contacting with the part or the location of the engine or the transmission to which the part is to be attached an adhesive comprising a polythiol ether having two or more reactive groups capable of reacting with a curing agent and a curing agent for the polythiol ether and thereafter contacting the part with the engine or transmission such that the adhesive is disposed between them and curing the adhesive.

Abstract: The invention is a two part polymerizable composition comprising in one part an organoboron compound capable of forming free radical generating species amine complex and in the second part one or more compounds capable of free radical polymerization and a cure accelerator comprising a) at least one compound containing a quinone structure or b) at least one compound containing at least one aromatic ring and one or more, preferably two substituents on the aromatic ring selected from hydroxyl, ether and both, where there are two substituents they are located either ortho or para with respect to one another and a peroxide containing compound. The second part may further contain an agent capable of causing the organoboron compound to form free radical generating species upon contacting the two parts. The first part may further comprises one or more compounds capable of free radical polymerization. This facilitates formulating compositions that have commercially desirable volumetric ratios of the two parts.