Abstract: A complex comprises organoborane and polyoxyalkylenepolyamine. The complexes are useful in systems for initiating the polymerization of acrylic monomer, which systems further include an amine reactive compound. Polymerizable acrylic monomer compositions useful as adhesives can be prepared.

Abstract: A removable pressure sensitive adhesive comprises pressure sensitive adhesive microparticles that are the polymerization product of a mono-olefinically unsaturated monomer having an aldehyde group or a ketone group, and a base monomer. By the addition of a polyhydrazide, other adhesives with improved properties can be provided.

Abstract: A flexible carrier tape for storage and delivery of components by an advancement mechanism, comprises a strip portion, a plurality of aligned pockets spaced along the strip portion for carrying the components, wherein each pocket includes a bottom wall, and a non-pressure sensitive adhesive comprising a thermoplastic elastomer block copolymer on the bottom wall of the pocket for retaining a component in the pocket.

Abstract: The invention provides a thermosettable resin composition comprising (a) one or more thermosettable resins, (b) one or more of curatives, hardeners, and optionally catalysts for the curing of the thermosettable resin in an amount sufficient for the cure of the thermosettable resin, and (c) an effective amount of at least one non-functional cyclophosphazene to render said resin composition, when cured, flame retardant. The non-functional cyclophosphazene contains aryloxy group substitution and does not covalently bond with the resin network. As a result, the non-functional cyclophosphazene does not negatively impact key performance properties such as modulus, thermal stability, dielectric behavior, fracture toughness, moisture uptake or adhesion.

Abstract: A method of vibrationally damping article, comprising applying to the article a vibration damper comprising a radiation curable vibration damping material which comprises (a) from about 5 parts to about 95 parts by weight acrylic monomer and (b) correspondingly, from about 95 parts to about 5 parts by weight of a silicone adhesive, wherein the sum of (a) plus (b) equal 100 parts by weight, whereby the vibration damper vibrationally damps the article.

Abstract: A complex comprises organoborane and polyoxyalkylenepolyamine. The complexes are useful in systems for initiating the polymerization of acrylic monomer, which systems further include an amine reactive compound. Polymerizable acrylic monomer compositions useful as adhesives can be prepared.

Abstract: A complex comprises organoborane and polyamine. The polyamine is the reaction product of a diprimary amine-terminated material and a material having at least two groups reactive with primary amine. The complexes are useful in systems for initiating the polymerization of acrylic monomer, which systems further include a material reactive with amine. Polymerizable acrylic monomer compositions useful as adhesives can be prepared.

Abstract: A tear resistant film comprises more than five layers situated one on the other in a parallel array. The layers are individually selected from a stiff polyester or copolyester, a ductile polymeric material, and optionally, an intermediate material. The stiff polyester or copolyester is oriented in at least one direction. Tear resistance may be measured in a Graves area test and reflects the ability of the film to absorb energy. The films of the invention are useful in many articles including security control laminates for glazing members.

Abstract: A coated abrasive article comprises a backing, a first binder on the backing, and a plurality of abrasive particles in the first binder. The first binder is a hot melt pressure sensitive adhesive that is energy cured to provide a crosslinked coating. The invention also relates to a method of producing such articles.

Abstract: A blend of isocyanate-terminated polyurethane prepolymers is provided. The blend consists essentially of a first crystalline prepolymer based upon polyhexamethylene adipate and a second prepolymer based upon polytetramethylene ether glycol.

Abstract: A blend of isocyanate-terminated polyurethane prepolymers is provided. The blend consists essentially of a first crystalline prepolymer based upon polyhexamethylene adipate and a second prepolymer based upon polytetramethylene ether glycol.

Abstract: A blend of isocyanate-terminated polyurethane prepolymers is provided. The blend consists essentially of a first crystalline prepolymer based upon polyhexamethylene adipate and a second prepolymer based upon polytetramethylene ether glycol.

Abstract: A tray is provided for transporting components, such as electronic components. The tray includes a frame and an insert that is releasably secured to the frame. The insert has a plurality of pockets formed therein for storing the components. Inserts having a variety of pocket sizes and arrangements may be secured to frames of a standard size.

Abstract: A polymerizable acrylic composition comprises:(a) at least one acrylic monomer;(b) an effective amount of an organoborane amine complex having the structure: ##STR1## wherein: R.sup.1 is an alkyl group having 1 to 10 carbon atoms;R.sup.2 and R.sup.3 are independently selected from phenyl-containing groups and alkyl groups having 1 to 10 carbon atoms;R.sup.4 is selected from the group consisting of CH.sub.2 CH.sub.2 OH and (CH.sub.2).sub.x NH.sub.2 wherein x is an integer greater than 2;R.sup.5 is hydrogen or an alkyl group having 1 to 10 carbon atoms; andthe nitrogen atom to boron atom ratio is about 1:1 to 1.5:1; and(c) an effective amount of an acid for initiating polymerization of the acrylic monomer.The polymerizable acrylic compositions are especially useful for bonding low surface energy substrates.

Abstract: Adhesive beads comprise a core comprising a pressure sensitive adhesive material and an essentially discontinuous organic polymer disposed about the core. The beads are free-flowing at room temperature. Upon application of heat and/or pressure the core is activated and blends with the coating to provide a pressure sensitive adhesive.

Abstract: A blend of isocyanate-terminated polyurethane prepolymers comprising: (a) a first prepolymer which comprises the reaction product of an at least essentially semicrystalline hydroxy-functional material and a polyisocyanate; (b) a second prepolymer which comprises the reaction product of a poly(tetramethylene glycol) ether and a polyisocyanate; and (c) a third prepolymer which comprises the reaction product of an essentially amorphous hydroxy-functional material and a polyisocyanate. The blend may also include a fourth prepolymer which comprises the reaction product of a slightly branched hydroxy-functional material and a polyisocyanate.

Abstract: A flexible carrier tape for storage and delivery of electronic components by an advancement mechanism comprises: (a) a strip portion having a top surface, a bottom surface opposite the top surface, and means for engagingly receiving the advancement mechanism; and (b) a plurality of aligned pockets for carrying the electronic components. The pockets are spaced along the strip portion and open through the top surface. The means for engagingly receiving the advancement mechanism comprises a plurality of hollow protuberances that are spaced equally along the strip portion, open through the strip portion, and extend outwardly from the strip portion. The protuberances are adapted to receive the advancement mechanism within the hollow portion. Methods for manufacturing such carrier tapes are also disclosed.

Abstract: A hot-melt adhesive of ethylene/vinyl acetate copolymer and tackifying resin can be spread into a thin layer that remains tacky for more than 5 seconds, after which a bond can be made without applying heat or more than hand pressure. Within a short period of time, the adhesive crystallizes so that the bond becomes creep-resistant. The temperature at which this hot-melt adhesive can be spread into thin layers is significantly lower than could be used with prior hot-melt adhesives that develop creep resistance.

Abstract: A method for vibrationally damping an article that is subject to resonant vibrations comprises the steps of providing a vibration damper and applying the vibration damper to the article to damp the resonant vibrations. The vibration damper comprises an acrylate viscoelastic vibration damping material and an effective amount of hydrophobic silica. The invention also relates to vibration dampers that utilize the acrylate viscoelastic vibration damping material as well as articles that incorporate the vibration dampers.

Abstract: A moisture curable hot melt composition comprises:(a) a first isocyanate-terminated polyurethane prepolymer that is the reaction product of a crystalline polyester polyol and a polyisocyanate;(b) a crystalline, reactive wax; and(c) optionally, a second isocyanate-terminated polyurethane prepolymer that is the reaction product of a polyisocyanate and a hydroxy-functional polymer that is different than the crystalline polyester polyol.