A water-based primer composition is particularly suitable for the pre-treatment of polycarbonate substrates, and has a component K1 having an aqueous epoxy resin dispersion, an aqueous polyester-polyurethane dispersion and an aqueous polyacrylate dispersion, and optionally a water-miscible organic solvent, and a second component K2 containing a water-dispersible curing agent based on isocyanate. The primers provide a strong bonding of subsequently applied adhesives to polycarbonate substrates, and permit a processing with a significant reduction in VOC emissions and the prevention of the occurrence of stress-cracks.

Curable compositions are provided for forming highly lubricious and long-lasting surfaces with optical clarity useful, for example, in optical applications in harsh environmental conditions. In some aspects, the curable formulations include an end-group modified perfluoropolyether (PFPE), a fluorinated lubricant, and a compatibilizer. The mixtures are curable to form a solid having an exposed surface. In some aspects, the fluorinated lubricant is chemically and physically matched to the resin such that, when cured, at least a portion of the fluorinated lubricant spontaneously forms a lubricious surface on the exposed surface. In some aspects, the compatibilizer is present in an amount sufficient to make the curable mixture miscible and to make the solid optically transparent while still spontaneously forming the lubricious surface. The lubricious surface can also be self-replenishing such that, when the lubricant is removed from the exposed surface, additional lubricant migrates to the surface to replenish the lubricious overlayer.

The invention relates to a process for bonding a silicone or silicone based material to a polyurethane and use of the bonded silicone-polyurethane in the manufacture of biomaterials, devices, articles or implants, in particular long term implantable medical devices in the fields of cardiology, orthopedics, plastic surgery and gastroenterology. The process involves the steps of (a) flame treating a surface of the silicone or silicone based material and (b) bonding the polyurethane to the flame treated surface of the silicone or silicone based material.

[Object] An object of the present invention is to provide an easily peelable adhesive tape that has a good peel adhesive strength when attached to an adherend and that can be easily peeled after being irradiated with active energy rays.

[Solution] The present invention is directed to an easily peelable adhesive tape that has, on at least one surface of a base material, an active energy ray-curable layer having a storage modulus (G.sub.a25) of less than 1.010.sup.6 Pa as measured at a temperature of 25 C. and a frequency of 1.0 Hz and has an adhesive layer on the surface side of the active energy ray-curable layer.

The sheet for semiconductor processing of the present invention includes a base, an unevenness-absorbing layer provided on one surface of the base, and a pressure sensitive adhesive layer provided on the unevenness-absorbing layer, wherein the pressure sensitive adhesive layer is composed of an energy ray-curable pressure sensitive adhesive, and a stress at rupture of the pressure sensitive adhesive layer after energy ray curing is 10 MPa or more.

The invention relates to the use of a separating medium, containing at least one essential oil or consisting of at least one essential oil, selected from the group consisting of phenols, phenylpropanoids and furanocoumarins, for separating at least two joining parts which are joined by means of an adhesive bond.

Articles and laminates include a substrate with a first polyester surface and a second polyester surface, a crosslinked polyurethane-based primer coated on at least the first polyester surface, and an optically clear heat activated adhesive adjacent to the crosslinked polyurethane-based primer. The articles and laminates are prepared by applying a polyurethane-based dispersion and a crosslinker on at least one polyester surface, drying the applied coating, heating while stretching the substrate and the coating to form a crosslinked primer layer on the stretched polyester surface, and applying an optically clear heat activated adhesive onto the crosslinked primer layer.

The invention relates to a process for bonding a silicone or silicone based material to a polyurethane and use of the bonded silicone-polyurethane in the manufacture of biomaterials, devices, articles or implants, in particular long term implantable medical devices in the fields of cardiology, orthopaedics, plastic surgery and gastroenterology. The process involves the steps of (a) flame treating a surface of the silicone or silicone based material and (b) bonding the polyurethane to the flame treated surface of the silicone or silicone based material.

A high pressure connection and method for making a high pressure connection. The method includes applying a primer composition to one distal joint portion, applying an anaerobically curable composition to the other distal joint portion; sliding one distal joint portion into the other distal joint portion and curing the anaerobic composition to maintain the second distal joint portion within the first distal joint portion thereby forming the high pressure connection. The method does not use plastic deformation of the first or second distal joint portions after the step of sliding. The method is advantageously useful for making high pressure connections in gas compression or refrigeration systems.

The present disclosure generally relates to curable precursor compositions for a polyurethane adhesive. In one exemplary embodiment, the composition includes (a) an isocyanate component comprising one or more isocyanates and (b) an isocyanate-reactive component comprising (bi) one or more triols selected from polyether triols, polyester triols, polyether-polyester triols and combinations thereof; (bii) one or more tetrols, selected from polyether polyols, polyester polyols, polyether-polyester polyols; and wherein the composition further comprises a catalyst system capable of catalyzing the formation of polyurethanes wherein the curing catalyst system contains a combination of bismuth, zinc and zirconium salts. Also provided are polyurethane-based adhesives, methods of bonding components with the adhesives and articles containing components bonded by the adhesives.