Abstract: A washable coated abrasive material comprising a substrate and maker, size and optionally supersize coats and a functionalized polysiloxane modifying the binder of the outermost layer.

Abstract: A mesh backed coated abrasive product is provided that has a binder coat that can be partially cured by radiation and finally cured at the same time as a size applied over the top of the maker coat. The use of the radiation curable binder permits the elimination of fabric pre-treatment and speeds the production process considerably.

Abstract: A friction promoting layer is provided which comprises a binder and particulate material and is suitable for use with film backed coated abrasives. The binder used is one that shrinks upon drying and curing to ensure that particulates in the layer are not buried in the binder component.

Abstract: A coated abrasives having very desirable efficiencies in production is provided by the use of a binder coat which comprises a compound having at least one function that is radiation curable and at least one function that is polymerizable under thermally activated conditions.

Abstract: Use of dielectric heating to cure a thermosettable resin component of a binder formulation used to secure abrasive particles to a backing in a coated abrasive greatly accelerates the production process.

Abstract: A particulate filled fluoropolymeric matrix composite article and method of making the same is presented. Preferably, the article comprises an electrical substrate material. The method for making the particulate filled polymeric matrix composite film includes mixing a polymeric matrix material with a dispersion of particulate filler in a carrier liquid to form a casting composition and adjusting the viscosity of the casting composition to retard separation of the particulate filler from the composition. A layer of the viscosity-adjusted casting composition is cast on a substrate and the layer is consolidated to form the particulate filled polymer matrix composite film. Films made by the method include very thin, e.g less than 1.0 mil, fluoropolymeric matrix films highly filled with very small diameter, preferably spherical, particles for use as, e.g. dielectric substrate materials in laminar electrical circuits.

Abstract: In accordance with the present invention, a circuit assembly is manufactured in an additive process using at least one layer of a fluoropolymer composite material and a conductive material. The conductive layers are plated, and the fluoropolymer composite layers are laminated. The use of the filled fluoropolymeric composite eliminates the need for a barrier metal layer between the insulation and the conductors. A plurality of these circuit assemblies are stacked, one on top of the other. At least, selected exposed locations of the conductive material comprise a diffusible conductive material (e.g., gold). Once stacked the circuit assemblies are subjected to lamination under heat and pressure to simultaneously fuse adjacent fluoropolymer composite material and diffuse adjacent diffusible conductive material together to form an integral multilayer circuit having solid conductive interconnects.

Abstract: A composite material is presented comprised of a ceramic filled fluoropolymer wherein the ceramic is coated with a silane and the ceramic has a volume % fraction of between about 26-45. The composite of this invention exhibits excellent chemical resistance, particularly to alkaline environments. Preferably, the silane comprises a blend of at least one phenyl silane and at least one fluorosilane. The silane is preferably coated to a level of 10% of the total weight of ceramic filler.

Abstract: A method for making a particulate filled polymeric matrix composite film includes mixing a polymeric matrix material with a dispersion of particulate filler in a carrier liquid to form a casting composition and adjusting the viscosity of the casting composition to retard separation of the particulate filler from the composition. A layer of the viscosity-adjusted casting composition is cast on a substrate and the layer is consolidated to form the particulate filled polymer matrix composite film. Films made by the method include very thin, e.g less than 1.0 mil, fluoropolymeric matrix films highly filled with very small diameter, preferably spherical, particles for use as, e.g. dielectric substrate materials in laminar electrical circuits.

Abstract: A composite material is disclosed. The material comprises a polymeric matrix and from about 20 volume percent to about 70 volume percent inorganic particles distributed throughout the matrix. Suitable inorganic particles include hollow inorganic microspheres and porous inorganic particles. The inorganic particles are coated with a surface coating. The composite material of the present invention exhibits a dielectric constant of less than about 2.5 and a thermal coefficient of expansion of less than about 70 ppm/.degree.C.

Abstract: A method for making a particulate filled polymeric matrix composite film includes mixing a polymeric matrix material with a dispersion of particulate filler in a carrier liquid to form a casting composition and adjusting the viscosity of the casting composition to retard separation of the particulate filler from the composition. A layer of the viscosity-adjusted casting composition is cast on a substrate and the layer is consolidated to form the particulate filled polymer matrix composite film. Films made by the method include very thin, e.g. less than 1.0 mil, fluoropolymeric matrix films highly filled with very small diameter, preferably spherical, particles for use as, e.g. dielectric substrate materials in laminar electrical circuits.

Abstract: A composite material is presented comprised of a ceramic filled fluoropolymer wherein the ceramic is coated with a zirconate coupling agent and/or a titanate coupling agent and the ceramic has a volume % fraction of between about 26-45.

Abstract: A composite material is presented comprised of a ceramic filled fluoropolymer wherein the ceramic is coated with a titanate and/or zirconate and the ceramic has a volume % fraction of between about 45-50.

Abstract: A composite material is presented comprised of a ceramic filled fluoropolymer wherein the ceramic is coated with a fluorosilane and the ceramic has a volume % fraction of between about 45-50.

Abstract: A ceramic filled fluoropolymer-based electrical substrate material well suited for forming rigid printed wiring board substrate materials is presented which exhibits improved electrical performance over other printed wiring board materials. Also, the low coefficients of thermal expansion and compliant nature of this electrical substrate material results in improved surface mount reliability and plated through-hole reliability. The electrical substrate material preferably comprises polytetrafluoroethylene filled with silica along with a small amount microfiberglass. In an important feature of this invention, the ceramic filler (silica) is coated with a silane coating material which renders the surface of the ceramic hydrophobic and provides improved tensile strength, peel strenth and dimensional stability. In addition, even improved results are provided when the silane coating is comprised of a fluorinated silane or a combination of fluorinated and non-fluorinated silanes.

Abstract: A thermoplastic composite material is presented which comprises a thermoplastic matrix which is highly filled with a coated ceramic filler. In an important feature of the present invention, the ceramic filler has been coated with a rubbery polymer that bonds to the filler. In a preferred embodiment, the thermoplastic matrix comprises a fluoropolymer, preferably a chlorofluoropolymer and the ceramic filler is a fused amorphous silica coated with a rubbery polymeric material. The thermoplastic composite material of this invention exhibits numerous advantages which makes it well suited for use as a bonding film, particularly a bonding film for producing multilayer printed wiring boards.

Abstract: A composite material is presented comprised of a ceramic filled fluoropolymer wherein the ceramic is coated with a zirconate coupling agent and/or a titanate coupling agent.