A moisture-permeable waterproof fabric includes: a cloth (i), an adhesive layer (ii), and a surface skin layer (iii). The adhesive layer (ii) is formed from a moisture-curable polyurethane hot melt resin composition that contains a urethane prepolymer (C) having an isocyanate group, and the urethane prepolymer (C) is a reaction product of a polyisocyanate (B) and a polyol (A) containing a biomass-derived polyester polyol (a1). The surface skin layer (iii) is formed from a urethane resin composition that contains a urethane resin (R) containing a polyol (P) and a polyisocyanate (Q) as essential raw materials thereof, and the polyol (P) contains a polyol (P1) having an oxyethylene group and a specific polyester polyol (P2).

An object of the invention is to provide a moisture-curable polyurethane resin composition containing a biomass raw material and having excellent adhesiveness to a fabric (particularly, a water-repellent fabric) and excellent film strength. The invention provides a moisture-curable polyurethane hot-melt resin composition containing: a urethane prepolymer (i) having an isocyanate group, which is a reaction product of a polyol (A) and a polyisocyanate (B), the polyol (A) containing a polyester polyol (a1) containing, as raw materials, a biomass-derived polybasic acid (x) and a biomass-derived glycol (y), and another polyester polyol (a2). In addition, the invention provides an adhesive containing the moisture-curable polyurethane hot-melt resin composition.

Described herein is a polyurethane including a reaction product of an isocyanate component, a polyol component, and graphene nano platelets. The graphene nano platelets are reacted in an amount of from about 0.1 to about 20% by weight, based on a total weight of the polyurethane. The graphene nano platelets have an average lateral dimension (x, y) of from about 1 to about 100 μm, an average through-plane dimension (z) of from about 5 to about 100 nm, and an oxygen content of from about 0.01 to about 10% by weight, based on a total weight of the graphene nano platelets.

The present disclosure provides a two-component solventless adhesive composition comprising a polyol component and an isocyanate component. The polyol component comprises a phosphate functional compound, and at least one polyol selected from polyester, polyether, and the combination thereof; and the isocyanate component comprises isocyanate prepolymer that is the reaction product of at least one isocyanate monomer and at least one polyol selected from polyester, polyether, and the combination thereof.

Laminate film structures including an adhesive layer having gas and moisture barrier properties are disclosed. The disclosed laminate film structures comprise films bonded together with an adhesive composition, the adhesive composition having barrier properties, e.g., controlling oxygen and/or water vapor transmission rates. The disclosed laminate film structures comprise films made from polymers and/or metallized polymers whereby the weight, thickness, and/or number of film layers has been reduced by using a barrier adhesive in place of a standard adhesive while still achieving similar barrier properties. Methods for forming laminate structures having a desired barrier performance are also disclosed, the methods comprising determining the desired barrier performance of the laminate structure, selecting a barrier adhesive, selecting two or more film layers, including at least a first film layer and a second film layer, applying the barrier adhesive on a surface of the first film layer, and bringing a surface of the second film layer into contact with the barrier adhesive applied on the surface of the first film layer, thereby forming the laminate structure having a desired barrier performance.

A biodegradable foam which includes a poly-ester-based polyurethane foam and a mixture comprised of a soil-dwelling carbon-digesting bacteria embedded in a carrier compound. The mixture of the soil-dwelling carbon-digesting bacteria is homogenously dispersed throughout the polyester-based polyurethane foam. This biodegradable foam exhibits biodegradation rates higher than a polyester-based polyurethane foam absent the soil-dwelling carbon-digesting bacteria.

The present invention relates to a process for manufacturing a shoe rubber outsole using a special heat and pressure stable water-based polyurethane dispersion adhesive without a pre-treatment of UV irradiation or plasma, as well as a process for manufacturing a shoe using the outsole manufactured as described herein and an PUD-based adhesive composition for the described processes.

The present application relates to an adhesive composition capable of fixing a battery cell in a battery module and a battery pack. According to one example of the present application, there is provided a two-component urethane-based adhesive composition which has excellent storage stability and processability and is capable of providing physical properties required in related uses in a short time.

A method for preparing a thermoplastic polyurethane elastomer material with micro air holes is provided. The method comprises the following steps: (1) is feeding liquid raw materials such as diisocyanate molecules and solid additives into a double-screw reactor to trigger a polymerization type chain extension reaction and then obtain a macromolecular weight hot melt. (2) is pushing the macromolecular weight hot melt into a mixing extruder and allowing the reaction to continue to obtain a macromolecular thermoplastic polyurethane melt. (3) is continuously adding the obtained macromolecular thermoplastic polyurethane melt together with polymer particles into a foaming extruder, and extruding the high-pressure hot melt from a mold head into an underwater granulation chamber. (4) is delivering the particles obtained after granulation into a separator by process water via a multi-stage pressure-release process water pipeline, separating, screening and drying the required particles to obtain the target product.

A polyurethane hot melt adhesive is provided. The polyurethane hot melt adhesive is formed by reacting an isocyanate component, a polyol component, and a chain extender component. The polyol component includes a first polyol and a second polyol, a number-average molecular weight of the first polyol is within a range from 650 to 1,500, and a number-average molecular weight of the second polyol is within a range from 1,500 to 3,000. The chain extender component includes a first chain extender and a second chain extender, and the second chain extender is a diyol having an ether group or a hydrocarbyl. A ratio between a weight percentage of the first chain extender and a weight percentage of the second chain extender is within a range from 9:1 to 4:1. A forming temperature of the polyurethane hot melt adhesive is within a range from 100° C. to 150° C.