The invention relates to a method for producing a thermoplastic polyurethane elastomer based on polyether carbonate polyols. The method comprises a first step, in which at least A) an organic diisocyanate and B) a polyol having a number-average molecular weight Mn>=500 and <=5000 g/mol are reacted to form an isocyanate-terminated prepolymer. In a second step, the prepolymer is reacted with C) one or more chain extenders having a molecular weight>=60 and <=490 g/mol and optionally D) a monofunctional chain stopper or E) an organic diisocyanate, wherein optionally at least F) one catalyst is used in the first and/or second step.; The molar ratio of the sum of the isocyanate groups from A) and, if applicable, E) to the sum of the groups reactive to isocyanate in B), C), and, if applicable, D) is >=0.9:1 and <=12:1, and component B) contains at least one polyether carbonate polyol, which can be obtained by adding carbon dioxide and alkylene oxides to H-functional starter substances. The invention further relates to a thermoplastic polyurethane elastomer produced in accordance with the method according to the invention, the use of said thermoplastic polyurethane elastomer to produce extruded or injection molded items, and the items produced by extrusion or injection molding.

The eyewear material is an eyewear material containing thermoplastic polyurethane. The eyewear material has a tan δ peak at both less than 0° C. and 0° C. or more and 70° C. or less observed in dynamic viscoelasticity measurement in tensile mode under the measurement conditions of a temperature increase speed of 5° C./min and a measurement frequency of 10 Hz.

A method of applying a material comprising a fusible polymer comprises the step of: applying a filament of the at least partly molten material comprising a fusible polymer from a discharge opening of a discharge element to a first substrate. The fusible polymer has the following properties: a melting point (DSC, differential scanning calorimetry; 2nd heating at heating rate 5° C./min) within a range from ≥35° C. to ≤150° C.; a glass transition temperature (DMA, dynamic-mechanical analysis to DIN EN ISO 6721-1:2011) within a range from ≥−70° C. to ≤110° C.; wherein the filament, during the application process, has an application temperature of ≥100° C. above the melting point of the fusible polymer for ≤20 minutes. There are still free NCO groups in the material including the fusible polymer.

The present invention relates to a polyurethane laminating adhesives, methods for producing a multilayer laminate by laminating at least two films with a polyurethane laminating adhesive, and multilayer laminates obtainable by these methods wherein the polyurethane laminating adhesive comprises an NCO-terminated polyurethane prepolymer obtainable by reacting a polyol mixture comprising: 0.1 to 20.0 wt % relative to the total weight of the polyol mixture of at least one polybutadiene polyol; and 5.0 to 99.9 wt % relative to the total weight of the polyol mixture of at least one polyether polyol, wherein the at least one polyether polyol comprises at least one polyether polyol with a number average molecular weight M.sub.n in the range of >1000 g/mol to 10000 g/mol; with at least one polyisocyanate, wherein the at least one polyisocyanate is used in an amount such that the isocyanate groups are present in molar excess relative to the hydroxyl groups of the polyol mixture. Also encompassed are the use of the described adhesives for laminating two or more films, and the multilayer laminates obtainable by the described methods.

A polymer film suited to use as a face mask or transdermal patch includes at least 30 wt. % of a thermoplastic polyurethane polymer which is the reaction product of a first polyether polyol having a molecular weight of at least 3000 daltons, optionally, a second polyether polyol having a molecular weight of no more than 2500 daltons, at least one of a third polyol having a molecular weight of up to 800 daltons, and a chain extender, a diisocyanate, optionally, a catalyst. The film includes up to 5 wt. % water.

The present invention aims to provide a cervical canal sealant that can be used as a sealant to stop bleeding in the uterus and vaginal discharge, particularly, a cervical canal sealant that can block the cervical canal to inhibit amniotic fluid leakage and that can also be peeled off without damaging reproductive tissue. The present invention relates to a sealant for reproductive organs in which a cured product (X) at 25° C. has a storage modulus G′ of 200 to 2,000 kPa, the cured product (X) being a cured product obtained by curing the sealant for reproductive organs to a thickness of 120 to 150 μm.

A method for reducing coefficient of friction of a laminate comprising a polyurethane adhesive is provided. The method comprises providing the polyurethane adhesive; and adhering at least two substrates with the polyurethane adhesive to form a laminate, wherein the polyurethane adhesive is formed by reacting (A) an isocyanate component comprising a prepolymer derived from the reaction of a diisocyanate, a polyethylene glycol and optionally an additional polyol; with (B) a polyol component. The method can achieve minimized COF and viscosity, while retaining other performance properties such as bond strength, heat seal strength and boil in bag resistance. A composition for preparing the adhesive, a laminate product prepared with said composition as well the method for preparing the laminate product are also provided.

Disclosed is a moisture reactive polyurethane hot melt adhesive composition that can be applied to substrates at a low coating weight even at application temperatures as low as 60 to 95° C. while retaining the advantageous high tack, green strength, cured bond strength and toughness of conventional high melting point polyurethane hot melt adhesives.

The present invention is an optically clear, curable adhesive including a polyvinylbutyral, a polyurethane (meth)acrylate, and a photoinitiator. The polyvinylbutyral has a dynamic viscosity of between about 9 and about 13 mPa.Math.s and a polyvinyl alcohol weight percent of less than about 18%. The polyurethane (meth)acrylate includes the reaction product of a diol, at least one diisocyanate, and a hydroxyfunctional (meth)acrylate or an isocyanatofunctional (meth)acrylate. When the optically clear, curable adhesive is placed between two transparent substrates and made into a laminate, the laminate has a haze of less than about 6%, a transmission of greater than about 88% and an optical clarity of greater than about 98% when cured. The optically clear, curable adhesive also has a peel adhesion of at least about 100 g/cm based on ASTM 3330 when cured.

Disclosed are a polyurethane for use in a polishing layer, and a polishing layer and a polishing pad using the same, the polyurethane including a terminal group represented by the following formula (I): R—(OX).sub.n— (I) wherein R represents a monovalent hydrocarbon group having 1 to 30 carbon atoms that may be substituted with a heteroatom or may be interrupted by a heteroatom, X represents an alkylene group having 2 to 4 carbon atoms, 90 to 100% of the alkylene group being an ethylene group, and n represents a number from 8 to 120.