Abstract: The present invention provides a novel multi-arm block copolymer, a novel pressure-sensitive adhesive made from a multi-arm elastomeric block copolymer, and a novel tape made therefrom. The multi-arm block copolymer has the general structure (A-B).sub.m Y(C-D).sub.n wherein A, B, C and D are polymer segments; Y is a residue of a multifunctional coupling agent; and m and n are the number of arms, where m and n are greater than 0 and the sum of m plus n is at least 3. A comprises a random copolymer of a monoalkenylarene and a conjugated diene; B and C comprise either a homopolymer of a conjugated diene or a polymer of two or more conjugated dienes; D comprises either a homopolymer of a monoalkenylarene or a copolymer of a monoalkenylarene and a conjugated diene wherein the Tg of D is greater than the Tg of A; and the weight percent of monoalkenylarene in the block copolymer is 40% or less.

Abstract: A pressure sensitive adhesive tape that employs a water-absorptive backing, a microparticle-containing pressure sensitive adhesive and a water-dispersible component is provided. A method of bonding close fitting parts is also disclosed. In the method, a microparticle-containing pressure sensitive adhesive tape (with or without the water-dispersible component in the adhesive) is employed. Articles made using the tape and/or by the method are also disclosed.

Abstract: The present invention provides a moisture-curable alkoxysilane functional polyurethane prepared from a hydroxy functional alkoxysilane. The hydroxy functional alkoxysilane is a hydroxyalkylenecarbamoylalkylene-alkoxysilanes referred to as a "hydroxycarbamoylsilane". The alkoxysilane functional polyurethanes may be used in a variety of applications to provide, for example, moisture-curable adhesives, sealants, putties and the like.

Abstract: A one-step emulsification process for preparing aqueous suspensions of hollow, acrylate polymer microspheres conducted in the presence of at least one acid that is not free radically polymerizable. Surprisingly, the use of such an acid eliminates the previous requirement of using a polar copolymerizable monomer in the one-step emulsification process. The hollow acrylate polymer microspheres prepared from the process of the invention may be tacky or tack-free.

Abstract: The invention is a flexible plate, suitable for use as a flexographic printing plate, comprising a flexible substrate primed with an aziridine functional material, and, contacting a primed surface of said substrate, a photosensitive layer which comprises a substantially polar acrylate compound, an elastomeric block copolymer, and a photoinitiator. The adhesion between the substrate and the photosensitive layer is strengthened by use of the aziridine functional primer in combination with a substantially polar acrylate compound. In contrast, when acrylate compounds with large nonpolar portions are used, the adhesion tends to be poor. The adhesion is further improved by exposure of the plate to radiation.

Abstract: The present invention provides electrically conductive sheet materials that contain columns of electrically conductive particles aligned to form continuous columns between lateral faces of the conductive sheet material. The particle columns are arranged so that the sheet is conductive through the thickness, but is electrically insulating in lateral directions. The present invention also provides methods by which such electrically conductive sheet materials can be made. The present invention is able to provide conductive pathways in a precise, regular array, at a very fine pitch.

Abstract: A curable coating composition comprising an ethylenically unsaturated organopolysiloxane base polymer, an organohydrogenpolysiloxane crosslinking agent, an effective amount of a precious metal containing hydrosilylation catalyst, and from 0.1 to 20 weight percent of a higher alkenyl-functional organopolysiloxane gum. The incorporation of the gum provides a composition which cures rapidly to a low coefficient of friction coating having stable release over time.

Abstract: A tape comprising a biaxially-oriented backing made from a polymeric film bearing on one major surface thereof a layer of pressure-sensitive adhesive and on the other major surface thereof a layer of low-adhesion backsize composition. The backing and the layer of pressure-sensitive adhesive intermix so as to form a commingled layer between them.

Abstract: The present invention provides a novel multi-arm block copolymer, a novel pressure-sensitive adhesive made from a multi-arm elastomeric block copolymer, and a novel tape made therefrom. The multi-arm block copolymer has the general structure (A-B).sub.m Y(C-D).sub.n wherein A, B, C and D are polymer segments; Y is a residue of a multifunctional coupling agent; and m and n are the number of arms, where m and n are greater than 0 and the sum of m plus n is at least 3. A comprises a random copolymer of a monoalkenylarene and a conjugated diene; B and C comprise either a homopolymer of a conjugated diene or a polymer of two or more conjugated dienes; D comprises either a homopolymer of a monoalkenylarene or a copolymer of a monoalkenylarene and a conjugated diene wherein the Tg of D is greater than the Tg of A; and the weight percent of monoalkenylarene in the block copolymer is 40% or less.

Abstract: The present invention provides an adhesive sheet that is extensible and conformable. The sheet comprises a non-creped flatback paper backing comprising cellulosic fibers and an elastomeric saturant and having an elongation at break of at least 8%; and an adhesive coating on at least a portion of at least one major surface of said backing. No mechanical means is used to generate extensibility or conformability in the backing of the adhesive sheet of the invention. The adhesive sheet combines all the advantages of a smooth flatback tape and the extensibility and conformability of a creped or microcreped tape.

Abstract: Electrically conductive elements on two substrates can be electrically interconnected by an adhesive tape containing electrically conductive equiax particles that are individually positioned in the adhesive layer in a predetermined pattern. Each particle is harder than the elements it is to interconnect, so that hand pressure causes the particles to penetrate into the elements, thus creating a reliable electrical connection. Particularly useful particles are glass beads having a metallic coating that is from 0.1 to 2 .mu.m thick.

Abstract: This invention relates to a sprayable adhesive that, when applied to a substrate, exhibits a color that confirms where it has been applied and then fades upon drying.

Abstract: A curable coating composition comprising an ethylenically unsaturated organopolysiloxane base polymer, an organohydrogenpolysiloxane crosslinking agent, an effective amount of a precious metal containing hydrosilylation catalyst, and from 0.1 to 20 weight of a higher alkenyl-functional organopolysiloxane gum. The incorporation of the gum provides a composition which cures rapidly to a low coefficient of friction coating having stable release over time.

Abstract: A carrier web with recesses or pockets therein which contain pressure sensitive adhesive. The recesses in the carrier web maintain the adhesive in a discrete pattern during handling and storage and prevent lateral flow of the pressure sensitive adhesive under ambient conditions. The patterned adhesive may be transferred to an article directly from the recesses in the carrier by pressing the article onto the carrier web or indirectly by transferring the adhesive first to a cover sheet or to the flat backside of the web and thence to the article.

Abstract: The present invention provides electrically conductive sheet materials that contain columns of electrically conductive particles aligned to form continuous columns between lateral faces of the conductive sheet material. The particle columns are arranged so that the sheet is conductive through the thickness, but is electrically insulating in lateral directions. The present invention also provides methods by which such electrically conductive sheet materials can be made. The present invention is able to provide conductive pathways in a precise, regular array, at a very fine pitch.

Abstract: Curable, solventless, liquid polyorganosiloxane compositions provide release coatings that exhibit a slippery feel. The composition comprises (a) a first polydiorganosiloxane terminated by silyl groups having one reactive group; (b) a second polydiorganosiloxane terminated by silyl groups having one reactive group, the reactive group of (a) being the same or different from the reactive group of (b), said reactive groups of (a) and (b) being reactive with one another to form a covalent bond; (c) a polydiorganosiloxane having three or more reactive groups that are reactive with either the reactive group of (a) or the reactive group of (b) or both to form a covalent bond; and (d) a catalyst for effecting the reaction of the reactive groups of (a), (b), and (c) to form covalent bonds. When coated on a substrate and cured, the composition provides release liners for pressure-sensitive adhesive tapes and pressure-sensitive adhesive transfer tapes.

Abstract: The present invention provides a novel multi-arm block copolymer, a novel pressure-sensitive adhesive made from a multi-arm elastomeric block copolymer, and a novel tape made therefrom. The multi-arm block copolymer has the general structure (A-B).sub.m Y(C-D).sub.n wherein A, B, C and D are polymer segments; Y is a residue of a multifunctional coupling agent; and m and n are the number of arms, where m and n are greater than 0 and the sum of m plus n is at least 3. A comprises a random copolymer of a monoalkenylarene and a conjugated diene; B and C comprise either a homopolymer of a conjugated diene or a polymer of two or more conjugated dienes; D comprises either a homopolymer of a monoalkenylarene or a copolymer of a monoalkenylarene and a conjugated diene wherein the Tg of D is greater than the Tg of A; and the weight percent of monoalkenylarene in the block copolymer is 40% or less.