Abstract: Elastomer coating composition are disclosed which cure at room temperature, and form highly flex-resistant, durable, and flexible protective layer on elastomers and provides excellent adhesion to elastomeric and metal substrates. The coating is a solvent solution of (A) a carboxylated hydrogenated acrylonitrile-butadiene copolymer, and (B) a room temperature isocyanate curing component. Coated bonded elastomer-metal composites are obtained without an additional application of heat to cure the coating.

Abstract: Epoxy-modified, two-part acrylic structural adhesives are disclosed. These adhesives are not inhibited by oxygen. Representative embodiments include 2-part acrylic structural adhesives comprising, in a first package from about 10 to about 90 percent by weight of at least one methacrylate selected from C3-C10 alkyl monosubstituted-, C1-C6 alkyl disubstituted-, C1-C4 alkyl tri-substituted, and F1-C4 alkyl tetra-substituted cyclohexyl methacrylate. The ring substituents are prefereably in the 3, 4, and/or 5 ring position, and linear or branched C4-C10 branched alkyl methacrylates; from about 10 to about 80 percent by weight of a toughener, and an adhesion promotor; and in a second package, a bonding activator, and optional epoxy resin.

Abstract: Disclosed are internally blocked borates useful for polymerizable compositions, and polymerizable adhesives made therewith. The internally blocked borates have general structures: wherein X represents —CHR6—, oxygen or sulfur; n is an integer; R1, R2, R3, R4, R5, and R6 are independently selected, for example, from unsubstituted and substituted C1-C10 alkyl, alkylene groups, or aryl groups, including other embodiments further defined, and M is a counter ion with positive charge m.

Abstract: Disclosed are internally blocked borates useful for polymerizable compositions, and polymerizable adhesives made therewith. The internally blocked borates have general structures: wherein X represents —CHR6—, oxygen or sulfur; n is an integer; R1, R2, R3, R4, R5, and R6 are independently selected, for example, from unsubstituted and substituted C1-C10 alkyl, alkylene groups, or aryl groups, including other embodiments further defined, and M is a counter ion with positive charge m.

Abstract: An aqueous adhesive composition, as for bonding nitrile rubbers to a metal substrate, has very good pre-bake resistance. The adhesive composition comprises a phenolic novolac or resole resin, chlorinated natural rubber, a reactive fillers, and precipitated silica. Utilization of the adhesive composition results in essentially failure of the nitrile rubber.

Abstract: A composite with a thermoplastic matrix and fiber reinforcement is made by rotation of an exit die about a roving of continuous fiber in the presence of a thermoplastic melt. The rotation causes opposing inner and outer helical flow conditions which reduce the melt viscosity of the polymer by shear thinning while dragging and directing the polymer into the fiber roving thereby wetting and dispersing the fiber. A composite structure is formed with a polymer rich skin and a core region of unidirectionally aligned polymer and fiber. The polymeric skin is composed of helically aligned polymer chains which are coiled by the rotation around the core to compress the core region and enhance fiber wet out.

Abstract: A method for bonding together two substrates that includes applying to a first substrate an adhesive composition that includes (a) a trifunctional olefinic first monomer, (b) an olefinic second monomer that is copolymerizable with the first monomer and (c) a free radical initiator and then contacting a second substrate to the composition-applied first substrate so that the first and second substrate adhesively bond together. There is also provided a method for providing a coating on a substrate that includes applying to the substrate a composition that includes (a) a trifunctional olefinic first monomer, (b) an olefinic second monomer that is copolymerizable with the first monomer and (c) a free radical initiator and then allowing the composition to cure.

Abstract: A polymer having at least one reactive terminal or pendant functional group that has been capped with a trifunctional olefinic compound. The polymer can be made by contacting a base polymer having at least one reactive terminal or pendant functional group with a trifunctional olefinic compound under conditions effective to react at least one of the terminal or pendant functional groups with the trifunctional olefinic compound. The capped polymers are particularly suitable as crosslinking toughening agents in multi-components compositions such as adhesives, coatings and matrices for composites.

Abstract: An adhesive composition that includes a free radical-polymerizable monomer component that includes a reaction product of a (hydroxy)acrylate with an anhydride and is substantially free of at least methyl methacrylate or methacrylic acid. The adhesive composition exhibits substantially reduced objectionable odor.

Abstract: The invention provides a magnetorheological grease composition which contains magnetic-responsive particles, a carrier fluid and a thickening agent. The composition according to the invention contains an effective amount of thickening agent to provide a composition of proper consistency with good properties and little settling of the magnetic-responsive particles.

Abstract: A polymer having a backbone repeat unit that includes at least two metal atoms bonded to each other and only one ethylenically unsaturated functional group wherein the backbone unit preferably has a structure of —C(R3)═C(R3)—[C(R3)(R4)]n—[M(R1)(R2)]a—[C(R3)(R4)]p— wherein n is 0 to 4; a is at least 2; p is 0 to 4; R1 and R2 are each independently selected from hydrogen, halogen, lower alkyl having 4 or fewer carbon atoms, alkenyl having 4 or fewer carbon atoms, or aromatic having one ring; R3 and R4 are each independently selected from hydrogen and lower alkyl having 1 to 4 carbon atoms; and M is a metal atom selected from at least one of Sn, Ge, Pb, Hg, Ni, Pd, Pt, Cr, Fe, Co, Cu and Zn. The polymer has at least 20 weight percent metal, preferably at least 50 weight percent metal, based on the weight of the polymer.

Abstract: A method for bonding two substrates that includes applying an autodepositable adhesive to one of the substrates and then bonding the substrates together. This method is especially useful for bonding elastomers to metals. According to a first embodiment, the autodepositable adhesive is a one coat adhesive having a low pH (approximately 1-3) and including (A) a flexibilizer or film-former, (B) optionally, an aqueous dispersion of a phenolic resin that includes water and a reaction product of a phenolic resin precursor, a modifying agent and, optionally, a multi-hydroxy phenolic compound wherein the modifying agent includes at least one functional moiety that enables the modifying agent to react with the phenolic resin precursor and at least one ionic moiety, and (C) an acid.

Abstract: A polymer having at least one reactive terminal or pendant functional group that has been capped with a trifunctional olefinic compound. The polymer can be made by contacting a base polymer having at least one reactive terminal or pendant functional group with a trifunctional olefinic compound under conditions effective to react at least one of the terminal or pendant functional groups with the trifunctional olefinic compound. The capped polymers are particularly suitable as crosslinking toughening agents in multi-components compositions such as adhesives, coatings and matrices for composites.

Abstract: What is disclosed is an adhesive composition that exhibits substantial durability in bonding peroxide cured elastomers to many substrates. The invention is directed to adhesives consisting essentially of a diluent, a maleimide compound, acid scavenger, a polymeric film former and precipitated silica, optionally a phenolic resole, polyyisocyanate, or isocyanatosilane. The present invention is further directed to a method of bonding peroxide-curable elastomers to metallic surfaces whereby the substrate ius coated with the adhesive composition, drying the adhesive composition coating, applying a peroxide-cured elastomer to the adhesive composition coating, and curing the assembly with heat and/or pressure.

Abstract: A polymer having at least one reactive terminal or pendant functional group that has been capped with a trifunctional olefinic compound. The polymer can be made by contacting a base polymer having at least one reactive terminal or pendant functional group with a trifunctional olefinic compound under conditions effective to react at least one of the terminal or pendant functional groups with the trifunctional olefinic compound. The capped polymers are particularly suitable as crosslinking toughening agents in multi-components compositions such as adhesives, coatings and matrices for composites.

Abstract: A primer or coating composition that includes (A) an aqueous dispersion of a phenolic resin that includes water and a reaction product of a phenolic resin precursor, a modifying agent and, optionally, a multi-hydroxy phenolic compound wherein the modifying agent includes at least one functional moiety that enables the modifying agent to react with the phenolic resin precursor and at least one ionic moiety, and (B) a flexibilizer. According to one embodiment the modifying agent is an aromatic compound. According to another embodiment the ionic moiety of the modifying agent is sulfate, sulfonate, sulfinate, sulfenate or oxysulfonate and the dispersed phenolic resin reaction product has a carbon/sulfur atom ratio of 20:1 to 200:1.

Abstract: Magnetorheological fluid concentrates are provided which contain a substantially dry mixture of magnetic-responsive powder and a thixotropic agent. The concentrates may be mixed with an aqueous or an organic carrier fluid to form magnetorheological fluids.

Abstract: A polymer having at least one reactive terminal or pendant functional group that has been capped with a trifunctional olefinic compound. The polymer can be made by contacting a base polymer having at least one reactive terminal or pendant functional group with a trifunctional olefinic compound under conditions effective to react at least one of the terminal or pendant functional groups with the trifunctional olefinic compound. The capped polymers are particularly suitable as crosslinking toughening agents in multi-components compositions such as adhesives, coatings and matrices for composites.

Abstract: Disclosed is a two-part polyurethane structural adhesive and method of bonding structural components, that exhibits at least 25 minutes of open time at 32° C. in large beads and cures to high strength under ambient conditions. The adhesive composition in one part is an isocyanate or isocyanate prepolymer and in a second part is a polyol mixture (I) or (II), wherein 75% to 100% by weight of the polyol mixture (I) or (II) are polyols having secondary hydroxyl functionality and the polyol mixture (I) or (II) contains a long chain secondary polyol defined hereinbelow. The polyol mixture in one embodiment is substantially absent short chain polyols having functionality of 2, and includes an amount from 30% to 80 % by weight on total polyol weight in (I) of long chain secondary polyol of molecular weight from 2000 to 12000 and from 20% to 70% by weight on total weight of the polyol mixture and of a short chain secondary polyol with functionality greater than 2 and a molecular weight of from 90 to 800.

Abstract: An aqueous composition that includes (A) a butadiene polymer latex that is prepared by an emulsion polymerization in the presence of a styrene sulfonate stabilizer and (B) a phenolic resin. A preferred aqueous butadiene polymer latex is one that is prepared by emulsion polymerization of at least 60 weight percent dichlorobutadiene monomer (based on the amount of total monomers used to form the butadiene polymer), in the presence of a styrene sulfonate stabilizer.