540 results about "Adhesive system" patented technology

The present invention is directed to an adhesive composition, which comprises an epoxy resin, a coupling agent, filler, and an effective amount of an amine-curing agent or curative for said epoxy resin. Advantageously, tri-functional and / or tetrafunctional epoxy resins and / or acrylate monomers will be incorporated into the adhesive composition in order to reduce open time and enhance substrate adhesion. Advantageously, a mixture of amines will be used in the curative including aliphatic amines, which have low viscosities and efficiently wet the substrate for enhancing adhesion; polyamines, which can be used to manipulate open time and allow for improved ratio tolerance of the adhesive system; and amine-terminated rubbers (ATBN), which can improve impact resistance and the toughness of the cured adhesive. Preferred coupling agents are silanes.

The present invention is directed to an adhesive composition, which comprises an epoxy resin, a coupling agent, filler, and an effective amount of an amine-curing agent or curative for said epoxy resin. Advantageously, tri-functional and / or tetrafunctional epoxy resins and / or acrylate monomers will be incorporated into the adhesive composition in order to reduce open time and enhance substrate adhesion. Advantageously, a mixture of amines will be used in the curative including aliphatic amines, which have low viscosities and efficiently wet the substrate for enhancing adhesion; polyamines, which can be used to manipulate open time and allow for improved ratio tolerance of the adhesive system; and amine-terminated rubbers (ATBN), which can improve impact resistance and the toughness of the cured adhesive. Preferred coupling agents are silanes.

A magneto-active adhesive and method of adhesive bonding by magnetic field. The method includes steps of providing at least two adherends to be bonded, providing a magneto-active adhesive system between the at least two adherends, the magneto-active adhesive system comprising a plurality of magnetic particles and an adhesive; and applying a non-cyclically varying magnetic field or a cyclically varying magnetic field induced by an alternating current having a frequency of less than 100 hz to the magneto-active adhesive system to change the adhesion of the magneto-active adhesive system to at least one of the adherends. Various carriers for microelectronic devices including magneto-active adhesive contact surfaces are also described within the scope of the invention.

Encapsulated cure systems are provided wherein a curative is incorporated into a solid or semi-solid carrier material whereby mere fracturing or failure of the capsule wall encapsulating such cure systems will not provide for or allow sufficient release of the curative. Also provided are adhesive systems incorporating said encapsulated cure systems.

A liquid form adhesive system is provided for spin-coating on wafers and mounting to rigid carrier substrates to support thinning and backside processing. The liquid adhesive comprises about 30-35% of a rosin, between 5-10% of a thermoplastic urethane, a nonionic surfactant present between 1-3%, and a trace of an ultraviolet fluorescing dye. The entire system is dissolved in 50-65%, by weight, of a dual solvent mixture composed of dimethylacetamide and propylene glycol monomethyl ether. When the mixture is made to a specific viscosity, filtered, applied by a spin-coating method to the wafer frontside surface, and cured, the result is a uniform and smooth surface of defined thickness. When the coated wafer is mounted to a rigid substrate, it may be mechanically thinned to thicknesses down to and beyond 25 um, depending upon the wafer composition, diameter, and process. Once thinned, the adhesive is safe for backside processing and is dissolved away at completion to provide a thinned wafer that is clean and ready for final dicing or chipping operations.

Non-tacky adhesive fastening systems are disclosed, which systems include non-tacky patterned adhesive systems and non-tacky three-dimensional adhesive systems. In a non-tacky adhesive fastening system, an engaging member including a non-tacky adherent is engageable with a receiving member including a non-tacky adherend. In a non-tacky patterned adhesive system, at least one of the engaging member and receiving member has the adherent / adherend disposed thereon in a patterned fashion. In a non-tacky three-dimensional adhesive system, at least one of the engaging member and receiving member includes a plurality of projections, thereby forming at least one three-dimensional adhesive surface. The non-tacky adhesive fastening systems exhibit advantageous peel characteristics and exhibit an increased resistance to contamination. The non-tacky adhesive fastening systems can be included in absorbent articles such as diapers and other consumer goods.

A two-part adhesive systems exhibiting improved fixture and open times are disclosed. In one embodiment, the system includes (a) an adhesive part being a mixture formed from (I) an ethylenically unsaturated monomer, (II) a metal molybdate, (III) a metal salt of an ethylenically unsaturated carboxylic acid in an amount less than 3 weight percent, and (IV) an ethylenically unsaturated carboxylic acid, and (b) an activator part which includes a free radical generator. In another embodiment, the system includes the above-described adhesive part substantially free of a metal salt of an ethylenically unsaturated carboxylic acid. Curable adhesives and laminates prepared with the two-part system are also disclosed.

A surgical device to stanch the flow of blood is disclosed. The surgical device can place an implantable adhesive over or around varices or other bleeders. The surgical device has a vacuum system for capturing tissue and an adhesive system to apply adhesive to the captured tissue. A vacuum chamber is used to contact tissue and contains a chamber therein for the reception of tissue. An adhesive applicator is provided within the vacuum chamber and moves longitudinally therein to apply adhesive to tissue. The surgical device can apply an adhesive patch to tissue or inject adhesive into tissue. Alternately, an adhesive actuator and a chemical agent can be dispensed to tissue within the vacuum chamber.

An adhesively mountable image using a reusable adhesive surface is provided. The image carrier is removable from the adhesive carrier, and a subsequent image carrier may be releasably bound to the same adhesive carrier. Kits for this system are also provided.

Disclosed is a polyol / polyisocyanate adhesive system having an isocyanate component and a catalyzed component which form a heat-cured composition when admixed and heated above a threshold temperature. The catalyzed component has a hydroxyl-functional component catalyzed with a catalyst combination of a heat-activatable amine or amine-like catalyst which is activated at temperatures above the threshold temperature, and an activatable complexed metal catalyst comprising the reaction product of tin or bismuth catalysts, or a mixture thereof, and a molar excess of a mercapto compound complexing agent. The catalyst combination is effective to maintain the processibility of the system at ambient temperatures while promoting the rapid cure of the system when heated above the threshold temperature.

The invention relates to a method of producing a wood based product, comprising applying an adhesive system onto one or more pieces of a wood-based material, and joining the one or more pieces with one or more further pieces of a material, the adhesive system comprises one component comprising starch and another component comprising one or more polymers (P) containing an amine group or an amide group. The present invention also relates to an adhesive system comprising one component comprising starch and another component comprising one or more polymers (P) containing an amine group or an amide group, the two components being present as unmixed separate components. The invention further relates to a wood based product.

The present invention relates to a rasagiline transdermal patch for treatment or prophylaxis of nervous system diseases, in which the patch comprises an inert backing layer chemically inert to substrate ingredients, a substrate layer comprising rasagiline or a pharmaceutically acceptable salt thereof, and a protective layer to be peeled off before use. The substrate layer is an adhesive system comprising an organic polymer material as basis and an inorganic or organic material as filler, and a plurality of micro-reservoirs containing rasagiline. The substrate further comprises one or more substances for enhancing the transdermal absorption of rasagiline, in which the above organic polymer material in the substrate is used for the reservoir of rasagiline and as adhesive.

Edges, hems, patches and seams for woven fabric that has been treated for water repellency, and methods for making the same, are shown and described. In one particular embodiment of the invention, for example, a lapped seam between two pieces of water repellent fabric has an outer material at least partially overlapping an inner material, and a laminate strip positioned between the overlapping portions of the materials. The outer and inner materials, which are both oriented in the same direction, have an exterior layer of woven fabric that has been treated with water repellent and / or stain repellent chemicals, and an inner layer comprising a polymer membrane, such as polyurethane. The laminate strip has a bottom portion in contact with the outer layer of the inner material. The bottom portion has a low melt point, high flow rate adhesive system of one or more layers that penetrates and surrounds the fibers in the woven fiber of the outer layer of the inner piece of material. The laminate strip also has a top layer in contact with the inner layer of the outer piece of material. The top layer of the laminate is a thin, elastic, highly abrasion resistant material with a strong bonding affinity for polyurethane. The layers of the laminate strip bond to the adjacent layers of the overlapped material to create a strong lap seam.

The present invention relates to a system and a method of improving the debonding of two or more surfaces together. The invention utilises thermoexpanadable microspheres and thermal energy to debond interfaces in an adhesive system or as vehicle carriers. It also discloses a method of curing the adhesive system prior to the debonding step so that the same adhesive system may be used for both phases. It is especially useful in the automotive industry for end of vehicle life dismantling.

An article useful for mechanical skin resurfacing techniques is suitable for transferring mechanical energy from a handheld device to skin placed in contact with the article. The article may be characterized by its Durable Abrasiveness, Compressibility, Displacement, and / or surface roughness. The article may be formed of a fibrous structure having a first major surface having associated therewith an adhesive system and a second major surface, generally opposite the first major surface. The second major surface is arranged and configured to reversibly engage a fastener of a motion-generating unit. The invention also relates to a coupling device for coupling a motorized apparatus to a disposable skin-contactable element. The coupling device includes a water-resistant first attachment and a second attachment for releasably affixing said article to a surface of the motion generation unit.

In some embodiments, an adhesive system for supporting thin silicon wafer is presented. In this regard, a method is introduced to bond a silicon wafer to a translucent carrier through the use of an adhesive. Other embodiments are also disclosed and claimed.

A body waste collecting device comprising a collecting pouch and an adhesive wafer for attachment to the body, said adhesive wafer comprises a backing layer, a first adhesive and an additional second adhesive, wherein said additional second adhesive comprises a polyalkyleneoxide polymer and an organosiloxane based cross-linked adhesive system.

The invention relates to an adhesive system which is based on a non-reactive thermoplastic adhesive melt. The adhesive melt (A) contains a mixture of at least two metallocene-catalytically produced copolymers which are different from each other, and which are based on at least two a-olefins, whereby the copolymers of the mixture, which are different from each other, have different melt indices (MFIs); (B) optionally, at least one additional polymer; and (C) optionally, at least one resin and / or at least one wax. The inventive adhesive system is particularly suitable for use in the wood and furniture industry, e.g. for covering profiles or for gluing edges, in particular, by comparing copolymer adhesives to EVA melt adhesives which are used in a traditional manner, and the system enables considerably lower application temperatures to be used, and at the same time exhibiting improved adhesion capacity.

The invention discloses a halogen-free epoxy adhesive which is prepared from the following components in parts by weight: 10-80 parts of phosphorus-containing epoxy resin, 10-40 parts of rubber modified epoxy resin, 10-50 parts of a toughening agent, 1-25 parts of a curing agent, 0.01-1.0 part of a curing accelerant, 0-80 parts of inorganic filler, 1-40 parts of a phosphorus-containing fire retardant, 1-40 parts of a nitrogenous fire retardant and 0.01-1.0% of an antioxidant. According to the invention, the components are dispersed into an organic solvent according to the proportion, so that the adhesive with the solid content of 30-50wt% can be obtained. The halogen-free epoxy adhesive does not contain halogen, and uses the phosphorus-containing fire retardant and the nitrogenous fire retardant to cooperate with a flame-retardant adhesive system, thus reducing the dosage of the phosphorus-containing fire retardant, and overcoming the negative effect caused by using a great deal of phosphorus-containing fire retardant; the halogen-free epoxy adhesive is good in fire resistance, excellent in heat resistance, high in reliability and better in mechanical property. The invention also discloses a cover film prepared from the halogen-free epoxy adhesive, and the cover film has the fire resistance of UL 94V-0 level, excellent stripping strength, heat resistance and processing performance.

Foamed, aqueous adhesive compositions are used to manufacture tissue laminate products including or especially as bathroom tissue, facial tissue, paper towels, and the like. Foaming typically occurs by introducing pressurized gas and adhesive flows in a nozzle chamber on demand, wherein the kinetic energy of the flows is used to provide mixing energy. The adhesive preferably is dispensed as a plurality of discrete, foamed adhesive particles. The foamed adhesive can be used for intralamina bonds, interlaminate bonds, bonding loose sheet extremities, bonding roll to roll, and the like. The invention provides a reliable, straightforward way to accomplish in-nozzle foaming of an adhesive.

The invention relates to a method for manufacturing a CTI copper-clad laminate. The method is realized by the following steps: glue mixing, sizing, plate arrangement, hot-press molding, disassembly, processing and inspecting, wherein an adhesive system in the step of the 'glue mixing' is composed of the following materials in mass ratio (kg): 125 to 133 kg of low brominated epoxy resin, 2.60 to 3.40 kg of dicyandiamide, 30 to 36 kg of dimethyl formamide, 0.060 to 0.080 kg of dimethyl imidazole, and 10 to 40 kg of aluminum hydroxide, wherein the low brominated epoxy resin belongs to tetrabromobisphenol A type brominated epoxy resin, and the content of bromine accounts for 10 to 14 mass percent of the low brominated epoxy resin. The method has the advantage of improving the tracking voltageresistance of a PCB substrate.

In one aspect the invention is a composition comprising a prepolymer which is the reaction product of di(isocyanatophenyl)methane or a polymeric di(isocyanatophenyl)methane having an isocyanato functionality of about 2.1 to about 3.0 with a mixture of one or more diols and one or more triols wherein the ratio of isocyanate equivalents to hydroxyl equivalents in the reaction mixtures used to prepare the prepolymer is from about 1.2 to about 1.8 and the ratio of diol to triol where the diisocyanate is a di(isocyanatophenyl)methane in the reaction mixture is from about 5:1 to about 1:1. and where the isocyanate is a polymeric di(isocyanatophenyl)methane is from about 8:1 to about 4:1; wherein the prepolymer could further react with an isocyanate reactive monofunctional compound. The prepolymer herein has an isocyanate content of about 0.5 to about 1.5 percent by weight, a free isocyanate monomer content of about 1.0 percent by weight or less as measured by high pressure liquid chromatography. These prepolymers can be used in many applications including adhesive, sound dampening sealer and coating and especially in making adhesives or adhesive systems with a low content of monomeric isocyanate to bond together similar or dissimilar substrates such as metal, glass, ceramics, plastic and painted steel panel.

Edges, hems, patches and seams for woven fabric that has been treated for water repellency, and methods for making the same, are shown and described. In one particular embodiment of the invention, for example, a lapped seam between two pieces of water repellent fabric has an outer material at least partially overlapping an inner material, and a laminate strip positioned between the overlapping portions of the materials. The outer and inner materials, which are both oriented in the same direction, have an exterior layer of woven fabric that has been treated with water repellent and / or stain repellent chemicals, and an inner layer comprising a polymer membrane, such as polyurethane. The laminate strip has a bottom portion in contact with the outer layer of the inner material. The bottom portion has a low melt point, high flow rate adhesive system of one or more layers that penetrates and surrounds the fibers in the woven fiber of the outer layer of the inner piece of material. The laminate strip also has a top layer in contact with the inner layer of the outer piece of material. The top layer of the laminate is a thin, elastic, highly abrasion resistant material with a strong bonding affinity for polyurethane. The layers of the laminate strip bond to the adjacent layers of the overlapped material to create a strong lap seam.

A water activated adhesive system is described that is particularly suited for applying non-paper polymeric labels to surfaces which have low moisture permeability. The adhesive system is characterized by a dry non-tacky surface that becomes tacky in less than one second when contacted with a water-based activator. While it is a water activated adhesive, it is also characterized after aging bonded to a substrate by resistance to adhesive failure during 72 hours of immersion in ice / water mixture. The adhesive is beneficial to allow use of existing paper labeling equipment with polymeric labels.

The invention relates to curable, storage-stable silicon-containing compositions reinforced with functionalized silica useful as one and two-part sealant and adhesive systems. The cured compositions provide silicon-containing rubber having excellent translucency, physical properties and primerless adhesion.

A composite article comprises a plurality of lignocellulosic pieces and an adhesive system disposed on the plurality of lignocellulosic pieces for bonding the plurality of lignocellulosic pieces. The adhesive system comprises a binder component and a tackifier component. The tackifier component comprises a cationic polymer. The tackifier component is useful for maintaining orientation of the plurality of lignocellulosic pieces during manufacture of the composite article. The composite article may be various engineered lignocellulosic composites, such as particleboard.