Abstract: A method for repairing a damaged automobile exterior roof panel the includes removing the damaged roof panel section so as to leave an overlap portion of the original roof panel extending peripherally around the edge of the opening, fashioning a replacement roof panel that includes a peripheral bonding section that extends beyond the outermost dimension of the opening, and then adhesively bonding the overlap portion of the original roof panel to the peripheral bonding section of the replacement roof panel.

Abstract: An adhesive composition based on a combination of a water soluble amino silane and a normally water-immiscible alkenyl-functional silane wherein the latter is hydrolyzed in the presence of the former under specified conditions to form a stable, water-dilutable aqueous composition having marked bonding affinity between polymers and solid substrates.

Abstract: A magnetorheological fluid that includes magnetic-responsive particles, a carrier fluid and a phosphorus additive. The magnetorheological fluid does not include an organomolybdenum, a thiophosphorus additive or a thiocarbamate additive.

Abstract: An aqueous composition for coating a metallic substrate that is prepared by mixing at least one silane (preferably at least two silanes), at least about 20 weight percent phosphoric acid based on the total weight of the composition, and water, wherein the composition is substantially free of an organic solvent and a chromium-containing compound. The pH of the composition must not be above 3. The composition can be coated on a metallic substrate, particularly an aluminum substrate, to provide a pre-treatment layer for adhering overcoats.

Abstract: A magnetorheological fluid that includes a carrier component and a magnetizable particle component wherein the magnetizable particle component has a fractional packing density of at least 0.50 prior to formulation into the magnetorheological fluid. Use of this magnetorheological fluid can increase the force output of a magnetorheological device without increasing the viscosity of the fluid because the particle volume concentration in a working gap of the device increases when a magnetic field is applied.

Abstract: A free radical curable composition that includes a free radical curable and a vinyl aromatic compound that is chemically different than the free radical curable component, wherein the vinyl aromatic compound is present in an amount sufficient to decelerate the cure rate of the free radical composition without adversely effecting completion of cure and the properties of the curable composition after it has cured. The composition is particularly useful as a two part adhesive that includes a free radical catalyst system and a diene elastomer.

Abstract: An aqueous composition for coating a metallic substrate that is prepared by mixing at least one silane (preferably at least two silanes), at least about 20 weight percent phosphoric acid based on the total weight of the composition, and water, wherein the composition is substantially free of an organic solvent and a chromium-containing compound. The pH of the composition must not be above 3. The composition can be coated on a metallic substrate, particularly an aluminum substrate, to provide a pre-treatment layer for adhering overcoats.

Abstract: An olefinic-terminated polyalkadiene that includes carboxy ester linking groups and at least one nascent secondary hydroxyl group that is capped with a monoisocyanate. This polyalkadiene can be made by reacting a hydroxyl-terminated polyalkadiene with a saturated cyclic acid anhydride to form a carboxylic acid-terminated polyalkadiene, reacting the carboxylic acid-terminated polyalkadiene with an olefinic monoepoxide to form an olefinic-terminated polyalkadiene, then reacting the olefinic-terminated polyalkadiene with a monoisocyanate.

Abstract: A magnetorheological fluid that includes magnetic-responsive particles, a carrier fluid and an organomolybdenum. The organomolybdenum preferably includes at least one molybdenum atom bonded to at least one organic moiety wherein the organic moiety can be derived from a precursor selected from the group consisting of a saturated or unsaturated hydrocarbon, an aromatic hydrocarbon, an oxygen-containing compound, a nitrogen-containing compound and a compound containing more than one functional group.

Abstract: A magnetorheological fluid that includes magnetic-responsive particles, a carrier fluid and at least one thiophosphorus and/or thiocarbamate additive. Preferably, the thiophosphorus or thiocarbamate additive is a metallic dialkyldithiophosphate or a metallic dialkyldithiocarbamate.

Abstract: Cyclic acetal derivative of a resole includes the reaction product of an ortho resole compound with a carbonyl compound or a carbonyl compound derivative. The cyclic acetal derivatives of phenolic resole compounds exhibit enhanced storage stability and can be readily activated at elevated temperatures to prepare phenolic based adhesives and coatings.

Abstract: A magnetorheological material that includes magnetic particles; at least one water-soluble suspending agent selected from the group consisting of cellulose ether and biosynthetic gum; and water. The material can have a high particle loading, minimizes waste disposal problems, and can be produced at a lower cost relative to magnetorheological materials that include hydrophobic-oil type fluids as a carrier fluid.

Abstract: Cyclic acetal derivative of a resole includes the reaction product of an ortho resole compound with a carbonyl compound or a carbonyl compound derivative. The cyclic acetal derivatives of phenolic resole compounds exhibit enhanced storage stability and can be readily activated at elevated temperatures to prepare phenolic based adhesives and coatings.

Abstract: A magnetorheological material containing a carrier fluid, a particle component and a thixotropic additive to provide stability against particle settling. The thixotropic additive can be a hydrogen-bonding thixotropic agent, a polymer-modified metal oxide, or a mixture thereof. The utilization of a thixotropic additive creates a thixotropic network which is unusually effective at minimizing particle settling in a magnetorheological material.

Abstract: A composition that includes an olefinic-terminated polyalkadiene that includes carboxy ester linking groups and at least one nascent secondary hydroxyl group that is capped with a monoisocyanate. The composition also includes a free radical-polymerizable monomer such as an olefinic monomer and, optionally, a second polymeric material. In a preferred embodiment the composition is an adhesive that also includes a phosphorus-containing compound and an ambient temperature-active redox catalyst system.

Abstract: An ester/urethane acrylate hybrid oligomer which is the reaction product of an acrylate/hydroxy-functional polyester, an isocyanate compound, and a hydroxy-functional acrylate compound. The acrylate/hydroxy-functional polyester is prepared by reacting a polyester polyol and an acrylate compound. The polyester backbone of the oligomer has both ester and urethane linkages to the terminal acrylate functionality. This hybrid nature of the polyester backbone provides an oligomer which can be utilized at low viscosity to facilitate processing while maintaining effective stain resistance and flexibility.

Abstract: A magnetorheological material containing a particle component and a carrier fluid or mixture of carrier fluids having a change in viscosity per degree temperature (.DELTA..eta./.DELTA.T ratio) less than or equal to about 16.0 centipoise/.degree.C. over the temperature range of about 25.degree. C. to -40.degree. C. The magnetorheological material exhibits a substantial magnetorheological effect and excellent lubricating properties with a minimal variation in mechanical properties with respect to changes in temperature. The magnetorheological material is advantageous in that it provides for the design of devices that are smaller, more efficient and consume less power.

Abstract: A magnetorheological material containing a carrier fluid and a magnetically active particle. The particle has been modified so that the surface of the particle is substantially free of contamination products. The contamination products are removed from the surface of the particle by abrader processing, chemical treatment or a combination thereof. Magnetorheological materials prepared using the particles from which contamination products have been removed exhibit significantly enhanced magnetorheological effects.

Abstract: Controllable composite structure or structural elements enclose magnetotheological fluids as a structural component between opposing containment layers to form at least a portion of any variety of extended mechanical systems, such as plates, panels, beams and bars or structures including these elements. The control of the stiffness and damping properties of the structure or structural elements is accomplished by changing the shear and compression/tension moduli of the magnetorheological fluid by varying the applied magnetic field. The composite structures of the present invention may be incorporated into a wide variety of mechanical systems for control of vibration and other properties.

Abstract: Adhesive compositions based on chlorinated polyolefins having chlorine contents greater than about 60 percent and molecular weights greater than about 500. The adhesive compositions contain the chlorinated polyolefin and a crosslinking agent. The chlorinated polyolefins are advantageous in that they can be prepared in an environmentally acceptable manner and can be utilized as a substitute for the traditional chlorinated natural rubber materials utilized in adhesive compositions without compromising adhesive performance. Preferred chlorinated polyolefins are prepared by a process involving the dispersion and chlorination of high surface area polyolefinic particles in an aqueous medium.