摘要:
Polyurethane-based pressure sensitive adhesives comprising the reaction product of: an isocyanate-reactive component comprising at least two isocyanate-reactive materials, an isocyanate-functional component; a reactive emulsifying compound; a chain capping agent and an optional chain extending agent. The adhesives, which are preferably pressure sensitive adhesives, can be prepared from 100% solids, waterborne or solventborne systems.
摘要:
An iodine/iodide-containing hot melt coatable adhesive is provided. This adhesive is prepared by mixing iodine and an iodide salt, individually or in combination, with solubilizing liquids. The iodine and iodide salt are combined with a pre-adhesive composition in a hot melt mixer, with an iodine/iodide complexing agent being present in the mixture. The mixture is mixed at a temperature from about 130° C. to about 200° C. and sufficiently to form an iodine/iodide-containing hot melt coatable adhesive. Alternatively, the iodide may be generated in situ. The adhesive so prepared may be packaged for coating on a substrate at a later time, or may be immediately coated to form an adhesive composite. Adhesive composites, particularly surgical incise drapes, are provided incorporating this hot melt coatable adhesive.
摘要:
Pressure sensitive adhesive articles and methods, particularly stretch removable adhesive articles that are preferably for use in adhering to skin or like delicate surfaces. Preferably, stretch removability of the article occurs as a result of the selection of a stretch removable pressure sensitive adhesive. In one embodiment of the articles and methods, the adhesive and backing delaminate upon removal. In another embodiment of the articles and methods, the backing includes a predefined tab located in a central location of the backing.
摘要:
A simplified process for flip-chip attachment of a chip to a substrate is provided by pre-coating the chip with an encapsulant underfill material having separate discrete solder columns therein to eliminate the conventional capillary flow underfill process. Such a structure permits incorporation of remeltable layers for rework, test, or repair. It also allows incorporation of electrical redistribution layers. In one aspect, the chip and pre-coated encapsulant are placed at an angle to the substrate and brought into contact with the pre-coated substrate, then the chip and precoated encapsulant are pivoted about the first point of contact, expelling any gas therebetween until the solder bumps on the chip are fully in contact with the substrate. There is also provided a flip-chip configuration having a complaint solder/flexible encapsulant understructure that deforms generally laterally with the substrate as the substrate undergoes expansion or contraction. With this configuration, the complaint solder/flexible encapsulant understructure absorbs the strain caused by the difference in the thermal coefficients of expansion between the chip and the substrate without bending the chip and substrate.
摘要:
Pressure sensitive adhesive compositions, and adhesive articles based thereon, crosslinked using a bis-amide crosslinking agent that are thermally stable, yet cleanly removable from a variety of substrates following exposure to high temperatures.
摘要:
Pressure sensitive adhesives and methods wherein the pressure sensitive adhesives include a silicone tackifying resin having no greater than about 1.5 wt-% Si—OH functional groups and a polydiorganosiloxane polyurea copolymer.
摘要:
Described are adhesive compositions containing a mixture of a pressure sensitive adhesive, a high Tg polymer, and a crosslinker to form a compatibilized blend that is optically clear. Methods of using the adhesive compositions, and multilayer assemblies such as optical elements prepared using the adhesives, are also provided.
摘要:
Pressure sensitive adhesive compositions comprising an unreactive mixture of polydiorganosiloxane polyurea copolymer, diluent, and silicate tackifying resin. The compositions are useful for articles such as medical devices.
摘要:
The present invention provides a fire retardant, multi-layer article, comprising: a first adhesive layer comprising a pressure sensitive adhesive; a core layer having an outer surface, the first adhesive layer adhered to at least a portion of the outer surface; a fire retardant disposed in at least one of the first adhesive layer or the core layer, the fire retardant comprising a brominated phosphate and being essentially free of antimony fire retardants and polybrominated biphenyls; and the tape being cleanly removable.
摘要:
The invention relates to a hot melt processable pressure sensitive adhesive comprising at least one elastomer, organophilic clay plate-like particles, and at least one non-volatile organophilic exfoliating agent. Also disclosed are articles prepared therefrom and methods pertaining thereto.