Abstract: An isocyanate-based elastomer containing a filler material, the filler material being present at a level in the range of from about 30% to about 90% by weight of the elastomer and having a specific gravity of less than about 2.0. A process for producing the isocyanate-based elastomer is also disclosed. The process comprises the steps of: providing a first mixture comprising a catalyst and a filler material, the filler material being wetted by the catalyst; providing a second mixture comprising an isocyanate and an active hydrogen-containing compound; mixing the first mixture and the second mixture to provide a reaction mixture; allowing the reaction mixture to react to produce the isocyanate-based elastomer.

Abstract: Substituted phenyl compounds endowed with chain extension activity for formulations such as polyurethanes are disclosed, and which have the general formula: ##STR1## wherein n is 1-1000 and m is 1-100; and R.sub.1 and R.sub.2 are each independently selected from the group --C.sub.2 H.sub.4 -- and --C.sub.3 H.sub.6 --; and R.sub.3 is from the group consisting of: ##STR2## and the diasteromeric salts thereof.

Abstract: Trisphenol PA tricyanate, prepolymers and crosslinked polymers thereof are provided. Blends of trifunctional cyanates and fluorinated or non-fluorinated difunctional cyanate are provided. The crosslinked polymers exhibit low dielectric loss properties and high glass transition temperatures and are suitable as the matrix material for structural composites including printed circuit boards.

Abstract: A mask for forming an image on a photographic print paper includes a mask sheet, a transparent protective layer, and a transparent intermediate layer. The mask sheet includes a transparent base sheet and an opaque pattern layer formed in a shape of the image on the base sheet. The transparent protective layer is disposed on the mask sheet so as to protect the opaque pattern layer. The transparent intermediate layer is disposed between the mask sheet and the protective layer. The intermediate layer has a softening temperature that is not more than 100.degree. C.

Abstract: A method for the preparation of shape memory polyurethane foams by reacting a polyisocyanate component and a polyol composition in the presence of a foaming agent comprising water wherein the polyisocyanate component contains at least 85% by weight of 4,4'-diphenylmethane diisocyanate or a variant thereof and the polyol composition comprises at least one polyoxyalkylene polyol containing oxyethylene residues, said polyol composition having an average nominal hydroxyl functionality of from 2.2 to 6, an average oxyethylene content of at least 86% by weight and an average hydroxyl equivalent weight from 250 to 1500.

Abstract: A mask and an exposure method are provided in which a wafer is irradiated with light transmitted through the mask formed with a predetermined pattern having a shielding region and a transmissive region, to transfer the pattern of said mask. In particular, the mask includes a first mask and a second mask. The first mask is formed with a pattern having a shielding region and a transparent region, while the second mask is formed with a pattern having a phase shifter for introducing a phase difference in a portion of the transmission light. The first and second masks are superposed relative to one another over the wafer so that a clear image may be focused on said wafer by making use of interference of said transmission light caused by said first and second mask. It is to be noted that this arrangement also has the advantage of not transferring images of foreign substances stuck on the back of the mask, to the wafer.

Abstract: This invention provides methods for producing a high-molecular weight polycarbodiimide solution from an organic diisocyanate in the presence of a carbodiimidation catalyst, wherein 1) a chlorinated aliphatic hydrocarbon or 2) an alicyclic ether is used as a solvent. This invention also provides a polycarbodiimide solution with excellent stability in preservation.

Abstract: A one step process for the preparation of toner compositions which comprises adding to an extruder a base resin, initiator, pigment, and optional charge enhancing additive; effecting crosslinking of the base resin in the extruder to provide a toner comprising a pigment, optional charge additive and crosslinked resin comprising linear portions and crosslinked portions; and wherein said crosslinked portions are comprised of densely crosslinked microgel particles.

Abstract: A coating composition in which the binding agent is a two-component system containing a) a polyisocyanate component and b) an isocyanate-reactive component and contains b1) specific ester group-containing secondary polyamines, b2) specific moisture-activatable blocked polyamines and b3) optionally other known compounds containing isocyanate-reactive groups, and a process for preparing coated substrates from this coating composition.

Abstract: A one-component type polyurethane adhesive: comprising, as a main component, a polyurethane precursor prepared by reaction of a polyisocyanate component (a) containing one or more polyisocyanate compounds (a-1) mention below and optionally one or more polyisocyanates (a-2) mention below with an active hydrogen compound (b) having a molecular weight of from 18 to 20,000 and having two or more active hydrogen groups in the molecule, at an equivalent ratio of the active hydrogen group of the active hydrogen compound component (b) to the isocyanate group of the polyisocyanate component (a) of more than 1.0; the polyurethane precursor containing a uretdione group and the active hydrogen group at an equivalent ratio of the uretdione group to the active hydrogen groups of from 0.25 to 1.0,(a-1): a polyisocyanate compound having at least a uretdione group in the molecule thereof, and(a-2): a polyisocyanate having two or more isocyanate groups in the molecule thereof.

Abstract: The invention relates to a polyether polyol, a water-curable polyurethane prepolymer prepared by using the polyether polyol, and a composition containing the prepolymer. The above polyether polyol is obtainable by subjecting an active hydrogen compound to addition polymerization reaction with ethylene oxide and an alkylene oxide of 3 to 4 carbon atoms in a specified ratio. The above water-curable polyurethane prepolymer is obtainable by reacting the polyether polyol with a polyisocyanate compound. The above composition comprises a mixture of the water-curable polyurethane prepolymer and the polyisocyanate. The above water-curable polyurethane prepolymer and composition provide a foam of fine and uniform cell structure with improved strength on curing with water.

Abstract: An alignment mark system and method of using the same wherein each mask of a sequence of masks includes a mask sequence indicium, a first alignment feature and a second alignment feature spaced from the first alignment feature. Each of the mask sequence indicium, the first alignment feature and the second alignment feature produce a corresponding structure as a result of the photolithographic process. The structure resulting from the second alignment feature is aligned with the first alignment feature of the immediately succeeding mask for proper alignment of the mask sequence.

Abstract: Foamed polyurethanes substantially free from non-uniform density distribution are obtained by dispersing an inert gas with mechanical stirring into a foamed polyurethane-forming composition containing substantially no blowing agent and comprising (1) an organic polyisocyanate component, (2) a polyol component comprising a high molecular weight polyol (A1) and a low molecular weight polyol (A2), (3) a dehydrating agent (B) and optionally organic microballoons, and curing the resulting composition containing therein the inert gas substantially homogeneously distributed. Foamed polyurethanes thus obtained are lightweight and of reduced warpage after processing and are suitable for model materials.

Abstract: The invention is in the field of three-dimensional hollow novelty items and their manufacture, particularly items such as artificial pumpkins that the consumer desires to carve or alter after purchase. Disclosed is a carvable novelty article, such as an artificial Hallo-ween pumpkin, comprising a polyurethane shell substantially surrounding an interior volume and having a thin, elastomeric coating, such as an acrylic, on the exterior surface of the shell. The carvable article can be formed by an inventive process in which polyurethane foam material, such as material having a nominal density of about 2.5-3.0 pounds per cubic foot, is sprayed from a nozzle rotating with respect to the inside of a mold. After the polyurethane foam article and the mold are separated, the article is coated with an elastomeric coating, such as an acrylic material that is applied as a liquid.

Abstract: The present invention provides photoimageable compositions, processes and articles of manufacture. In particular, the invention provides a process comprising electrophoretically applying a coating layer of a photoimageable composition onto a conductive surface, the composition comprising a material that contains one or more photoacid labile groups. The photoimageable compositions of the invention preferably comprise a photoacid generator, a material that contains one or more acid-clearable functional groups, and a carrier resin that contains one or more functional groups that are, or can be treated to be, at least partially ionized.

Abstract: A pressure sensitive adhesive composition which can be applied by hot melt techniques to one surface and adhered to a second surface by contact at ambient temperature, to thereby bond the two surfaces together. The adhesive composition is made of certain ethylene/n-butyl acrylate copolymers together with tackifier and optionally, plasticizer.

Abstract: Polyurethane foams can be prepared which have improved retention of insulative properties. The foams are prepared from formulations including a glycerine initiated ethoxylated polyol prepared from a formulation including from about two to about three moles of ethylene oxide per mole of glycerine initiator and/or a tri- to octa-functional substantially linear hydroxy alkane initiated ethylene carbonate ethoxylated polyol prepared from a formulation including from about 2 to about 15 moles of ethylene carbonate per mole of initiator wherein the ratio of moles of ethylene carbonate to initiator functionality is from 0.5 to less than 2.

Abstract: Disclosed is a radiation resistant propylene polymer composition comprising a propylene polymer material and generally from about 0.1 to about 5 pph, of the propylene polymer material, of a rosin material. A hindered amine is present when the concentration of the rosin material is low, i.e., below 1.0 pph. At higher concentrations of rosin material, the hindered amine is optional. Radiation sterilized articles in which at least part of the material construction thereof comprises said radiation resistant propylene polymer composition are also disclosed.

Abstract: Disclosed is a thermoplastic flexible film suitable for wrapping static sensitive devices such as electronic circuit boards. The film is made of an inherently hydrophilic polyether block amide copolymer in blend with a compatible polymer. Compatible polymers typically are amide polymers or are acid copolymers, such as the nylons or ionomers. The film does not have a degree of hydrophilicity unsuitable for packaging static sensitive devices. Yet the film is antistatic without requiring the addition of an antistatic agent.

Abstract: Diamino ureas having the formula ##STR1## wherein each ring is saturated and includes 3-5 carbon atoms and n alkyl substituents R of 1-4 carbon atoms each and n for each ring is 1-4, a method of using these materials as chain extending agents in the manufacture of poly(urethane/urea)s or polyureas, and polymers having at least one constituent unit derived from such diamino ureas are claimed.