Abstract: The present invention concerns improved polymerizable anaerobic compositions which contain (meth)acrylic ester monomers, peroxy polymerization initiators, saccharin a saccharin derivative or a related sulfimide derivative and an activator containing a ferrocene moiety.

Abstract: A fuel cell, having improved sealing against leakage, includes a fuel cell component having a cured sealant, wherein the cured sealant includes a telechelic-functional polyisobutylene, an organhydrogenosilane crosslinker, a platinum catalyst and a photoinitiator. The fuel cell component may be a cathode flow field plate, an anode flow field plate, a resin frame, a gas diffusion layer, an anode catalyst layer, a cathode catalyst layer, a membrane electrolyte, a membrane-electrode-assembly frame, and combinations thereof.

Abstract: The present invention concerns improved polymerizable anaerobic compositions which contain (meth)acrylic ester monomers, peroxy polymerization initiators, saccharin a saccharin derivative or a related sulfimide derivative and an activator containing a ferrocene moiety.

Abstract: The present invention relates to dual curing compositions, which cure with moisture and photo radiation, such as UV light, and methods for preparing and using same. In particular, the compositions of the present invention contain a polyether or polyester backbone, photocurable portion(s) and moisture curable portion(s). The photo curable portion is a urethane or carbamate linkage terminated with a (meth)acryloxyalkyl group. The moisture curable portion is either: (1) a portion terminated with a polyalkoxysilyl group; or (2) a portion having a urea linkage terminated with an alkylpolyalkoxysilyl group.

Abstract: The present invention is directed to reaction products prepared from at least one Michael addition donor material including two or more active methylene hydrogens; and at least one material capable of reacting with a Michael addition donor, the material having one Michael addition acceptor and at least one functional group selected from the group consisting of hydroxy, hydroxyalkyl, vinyl ether, amino, aminoalkyl, carboxy, carboxyalkyl, cyano, and cyanoalkyl groups; or reaction products prepared from (a) at least one Michael addition donor material comprising at least one Michael Addition donor group selected from the group consisting of cyano functional groups and phosphono functional groups; and (b) at least one material capable of reacting with the at least one Michael addition donor group, the material having at least one Michael addition acceptor, wherein the above reaction products are capable of forming free radicals upon exposure to actinic radiation; as well as compositions, and processes for making

Abstract: A two-part curable foaming composition comprising: (A) A first part comprising: (i) an alkoxysilyl capped prepolymer; and (ii) a polyhydrogen siloxane; (iii) optionally a catalyst which accelerates both foaming and cross-linking through said alkoxysilyl groups; and (B) A second part comprising: (i) a nitrogen-containing compound having an active hydrogen; (ii) water; and (iii) optionally a catalyst which accelerates both foaming and cross-linking through said alkoxysilyl groups; provided that at least one of the parts contain a catalyst and wherein after mixing together the first and second parts a cured elastomeric foam is formed.

Abstract: The present invention is directed to reaction products prepared from at least one Michael addition donor material including two or more active methylene hydrogens; and at least one material capable of reacting with a Michael addition donor, the material having one Michael addition acceptor and at least one functional group selected from the group consisting of hydroxy, hydroxyalkyl, vinyl ether, amino, aminoalkyl, carboxy, carboxyalkyl, cyano, and cyanoalkyl groups; or reaction products prepared from (a) at least one Michael addition donor material comprising at least one Michael Addition donor group selected from the group consisting of cyano functional groups and phosphono functional groups; and (b) at least one material capable of reacting with the at least one Michael addition donor group, the material having at least one Michael addition acceptor, wherein the above reaction products are capable of forming free radicals upon exposure to actinic radiation; as well as compositions, and processes for making

Abstract: The present invention is directed to acrylated urethanes including the reaction product of: (1)(a) at least one urethane having at least two isocyanate groups and at least one acrylate group; and (b) at least one alcohol compound having at least two hydroxyl groups; or (2) (a) at least one isocyanate functional urethane which is the reaction product of at least one alcohol compound selected from the group consisting of amino alcohols, thioether alcohols, phosphino alcohols and mixtures thereof and at least one polyisocyanate; and (b) at least one hydroxy-functional material having at least one acrylate group; curable compositions including the same and processes for making the same.

Abstract: The present invention relates to vinyl ether or acrylate terminated block resins, compositions incorporating same and methods for preparing same. In particular, the compositions of the present invention may contain a vinyl ether or acrylate terminated block resin, such as a polyurethane block copolymer, a reactive diluent having vinyl ether or 1-alkenyl ether and (meth)acrylate functionality and a curing initiator. The compositions may be exposed to an energy source, e.g., photoradiation, to impart tack-free surface cure.

Abstract: Flexible, moisture curing ABA triblock copolymers are prepared from poly(alkylene oxide) diols as the B segment and polyester diols as the A block. This backbone is end-capped with siloxy end groups to obtain RTV moisture curing triblocks having high strength and flexibility.

Abstract: The present invention relates to the preparation of a new class of materials, namely, an acrylate terminated or end-capped urethane/urea copolymer containing silicone soft segments capable of dual cure via unsaturated groups and dialkoxyl silanol groups. This new class of material is a reaction product of a partially methacrylated end-capped urethane polymer containing hard segment blocks and an amino alkylene dialkoxy end-capped siloxane block polymer, containing soft-segments. The aminoalkylene dialkoxysilane end-capped siloxane segment of this copolymer can include siloxane diol segments of various molecular weights (e.g., 1,000 to 20,000) end-capped with various alkylaminoalkylene trimethoxy silanes. This copolymer is therefore capable of dual cure via these functional groups.

Abstract: Curable (meth)acrylate adhesives are formulated with aliphatic urethane (meth)acrylate resins. The resins are urethane (meth)acrylate capped polyols wherein the urethane acrylate capping is derived from isophorone diisocyanate and a hydroxyalkyl (meth)acrylate and the polyol is an oligomeric aliphatic diol or triol having a number average molecular weight of from about 1500 to about 3500. The hydroxyalkyl (meth)acrylate may be hydroxy ethyl acrylate. The polyol may be a member selected from the group consisting of polyoxypropylene triols, polyTHF diols, polycaprolactone/polyTHF block copolymers, and polycaprolactone diols. The adhesives give good adhesion to common DVD substrate materials, and display excellent corrosion resistance in dissimilar metal bonding applications.

Abstract: Norbornenyl functional azlactone compounds of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are independently monovalent hydrocarbon groups or R.sup.1 and R.sup.2, together with the carbon atom to which they are attached comprise a cyclic hydrocarbon group, are prepared by Diels-Alder addition of cyclopentadiene to vinyl azlactones. The norbornenyl azlactones are useful for preparing norbornenyl functional resins by azlactone ring opening reactions. The resulting resins may be employed as polyene components of curable thiol-ene formulations.

Abstract: A curable thiol-ene composition specially adapted for use as a primary coating on optical fibers comprises a polythiol and a compound having a plurality of norbornene groups thereon, are characterized in that one of either the compound having the plurality of norbornene groups or the polythiol has a backbone of a poly(tetramethylene oxide), or is an oligomer thereof, and the poly(tetramethylene oxide) has a molecular weight of between 250 and 5,000. The formulations are relatively low viscosity liquids at practical application temperatures and cure substantially completely with very low irradiation fluence. The formulations cure in ambient air. There is no need to exclude oxygen or to control humidity. The formulations of the invention can be cured using low intensity UV lamps which do not generate significant amounts of heat. The cured products have excellent low temperature flexibility, good humidity and water absorbtion resistance and good thermal oxidative stability.

Abstract: A curable thiol-ene composition specially adapted for use as a primary coating on optical fibers comprises a polythiol and a compound having a plurality of norbornene groups thereon, are characterized in that one of either the compound having the plurality of norbornene groups or the polythiol has a backbone of a poly(tetramethylene oxide), or is an oligomer thereof, and the poly(tetramethylene oxide) has a molecular weight of between 250 and 5,000. The formulations are relatively low viscosity liquids at practical application temperatures and cure substantially completely with very low irradiation fluence. The formulations cure in ambient air. There is no need to exclude oxygen or to control humidity. The formulations of the invention can be cured using low intensity UV lamps which do not generate significant amounts of heat. The cured products have excellent low temperature flexibility, good humidity and water absorbtion resistance and good thermal oxidative stability.

Abstract: Anionically polymerizable di-.alpha.-cyanopentadienoate disiloxane compounds of the formula:[CH.sub.2 .dbd.CH--CH.dbd.C(CN)--C(.dbd.O)--O--CH.sub.2 --R--Si(R").sub.2 ].sub.2 --Owhere R is --CH.dbd.CH-- or --C(.dbd.CH.sub.2)-- and the R" groups are the same or different hydrocarbon or halo substituted hydrocarbon groups are prepared by hydrolysis of a cyanoacetoxypropenylsilane having a hydrolyzable group attached to the silicon atom and then condensing the resulting disiloxane compound with acrolein. The di-.alpha.-cyanopentadienoate disiloxane compounds are useful as instant adhesives and as co-monomers in cyanoacrylate or cyanopentadienoate instant adhesives, providing the adhesive polymers or copolymers with improved thermal resistance.

Abstract: A process comprising the steps of:1) reacting a norbornene compound of the formula: ##STR1## where R is H or methyl, R.sup.1 is a direct bond or --C(.dbd.O)O-- and R.sup.2 is vinyl, ethynyl, allyl or propargyl, with a silicon hydride functional compound in the presence of hydrosilation catalyst at a temperature of at least 60 degrees; and2) recovering a product which consists essentially of the addition products of the silicon hydride functional compound to the R.sup.2 group of the norbornene compound and which is substantially free of addition products of the silicon hydride functional compound to the internal ring double bond of the norbornene compound.The products of this process can be used to produce norbornene functional prepolymers which are useful in cureable silicone formulations based on thiolene or hydrosilation cure chemistry.

Abstract: Tris(norbornenyl) isocyanurate compounds of the formula: ##STR1## wherein R.sup.1 is either H or methyl group, are prepared from the base-catalyzed trimerization of norbornenyl isocyanate. Tris(norbornenyl) isocyanurate is suitable for use as a crosslinker in thiol-ene formulations containing a difunctional thiol oligomer or in systems containing norbornene-difunctional oligomers and polyfunctional thiols, producing improved high temperature properties for the cured compositions.

Abstract: A composition cureable to a solid crosslinked polyorganosiloxane comprises:a) a norbornene functional silicone prepolymer having a plurality of groups of the formula: ##STR1## bound to silicon atoms thereof, where R is H or methyl, R.sup.1 is a direct bond or --C(.dbd.O)O-- and R.sup.4 is ethylene, ethenylene, propylene or propenylene,b) a coreactive silicone prepolymer selected from SiH functional silicones, and alkylthiol functional silicones, said polyorganosiloxanes (a) and (b) being present in an equivalent ratio of between 2:1 and 1:2 norbornene to silicon hydride or alkyl thiol groups, andc) an effective amount of a hydrosilation or thiol-ene cure catalyst, respectively.

Abstract: A polysiloxane comprising a linear polydiorganosiloxane chain joined at one terminus to an acrylic-functional end group, and joined at its other end to a cross-linked MTQ moiety comprising a multiplicity of monofunctional siloxane units (M), trifunctional siloxane units (T), and tetrafunctional siloxane units (Q), wherein the concentration ratio of M units to the sum of T units and Q units, M/(T+Q), in the MTQ moiety is from about 0.55 to about 0.75, and wherein the number of siloxy repeating units in the linear polydiorganosiloxane chain is from 25 to 1,000. The M and or /T units may also contain (meth)acrylate groups. The MTQ/silicone hybrid resins of the invention are curable by UV radiation, to provide high tensile strength silicone compositions having utility in potting and conformal coating apllications.