The present invention relates to a process for continuous production of thermoplastic polyurethane by reacting the components (A) one or more cycloaliphatic, aliphatic and/or araliphatic polyisocyanates and (B) one or more cycloaliphatic, aliphatic and/or araliphatic polyols, wherein the entirety of component (B) has a hydroxyl number of 600 mg KOH/g to 1830 mg KOH/g as determined according to DIN EN ISO 4629-2:2016. The process comprises the process steps of: a) preparing a mixture of a portion of component (A), a portion of or the entirety of component (B) and optionally a portion or the entirety of component (C), where in process step a) there is a molar ratio of component (A) to component (B) in the range from 0.6:1.0 to 0.95:1.0; b) mixing the mixture prepared in process step a) with an outgoing oligomerisate substream obtained from process step e); c) reacting the mixture from process step b); d) dividing the reaction mixture obtained in step c) into two outgoing substreams; e) recycling one outgoing substream from process step d) as an incoming substream for the mixture in process step b); f) mixing the remainder of component (A) and where present the remainder of components (B) and (C) with the remaining outgoing substream of process step d); and g) reacting the mixture obtained in process step f) to obtain a thermoplastic polyurethane. The invention further relates to thermoplastic polyurethane obtainable or obtained by the process of the invention, and also to a composition containing the thermoplastic polyurethane according to the invention and to the use thereof.

The present disclosure provides a resin composition for a golf ball cover. The resin composition includes a thermoplastic polyurethane resin including 55 to 70 parts by weight of a polyol, 30 to 40 parts by weight of an isocyanate, and 0.2 to 0.4 parts by weight of a polysiloxane. The polysiloxane includes at least one hydroxyl group or a carboxyl group in the terminal alkyl group. The polyol and the isocyanate constitute a silicone-free thermoplastic polyurethane resin, and the polysiloxane and the isocyanate constitute a thermoplastic polyurethane resin that includes silicone in the main chain, thereby improving the scuff resistance and slip property required for a golf ball cover.

A thermoplastic polyurethane resin suitable for melt spinning is formed from a reaction mixture via a polymerization reaction. The reaction mixture includes an isocyanate component and a polyol component. The polyol component includes a first polyol that has a first number average molecular weight and a second polyol that has a second number average molecular weight. The first number average molecular weight is between 1,000 g/mol and 1,500 g/mol, and the second number average molecular weight is between 2,500 g/mol and 3,000 g/mol. One resin component formed by the first polyol via the polymerization reaction is defined as a low melting point segment and correspondingly has a first melting point between 170° C. and 185° C. Another resin component formed by the second polyol via the polymerization reaction is defined as a high melting point segment and correspondingly has a second melting point between 195° C. and 210° C.

Provided is a multilayer film that is excellent in chemical resistance without change in appearance and reduction in adhesive strength by preventing the swelling of a thermoplastic polyurethane layer when a chemical attaches thereto. A layer adjacent to a surface coating layer in the thermoplastic polyurethane layer of the multilayer film is constituted by a thermoplastic polyurethane that is a reaction product obtained by using hexamethylene diisocyanate (hereinafter, referred to as “HDI”), and comprises more than 30% of the thermoplastic polyurethane formed from HDI, and the thermoplastic polyurethane layer formed from HDI has a thickness of 5 μm or larger. This achieves a multilayer film that is excellent in chemical resistance without change in appearance and reduction in adhesive strength by preventing the swelling of a thermoplastic polyurethane layer when a chemical attaches thereto.

The present disclosure relates to a process of manufacturing a moisture-curable adhesive composition, wherein the process comprises the steps of: a) providing a multi-screw extruder comprising a reaction chamber; b) providing reactants and reagents comprising: i. at least one isocyanate; ii. at least one amine; and iii. optionally, at least one plasticizer; c) incorporating the reactants and reagents into the reaction chamber of the multi-screw extruder, thereby forming a reaction product comprising a urea derivative; and d) incorporating at least one moisture-curable prepolymer into the reaction product resulting from step c), thereby forming a moisture-curable adhesive composition. In another aspect, the present disclosure is directed to a moisture-curable adhesive composition obtainable by the process as described above.

A thermoplastic polyurethane resin suitable for a laminating process and a method for producing the same are provided. The thermoplastic polyurethane resin is formed of an isocyanate component, a polyol component, a chain extender component, and a chain terminator component that is a monohydric alcohol via a polymerization reaction. The polyol component includes a first polyol having a number average molecular weight between 600 and 2,000 g/mol and a second polyol having a number average molecular weight between 1,500 and 3,000 g/mol. The chain extender component includes a first chain extender and a second chain extender. The first chain extender is a dihydric alcohol having a carbon chain length of C2-6, and a molecular structure thereof is linear and symmetrical. The second chain extender is a dihydric alcohol having a carbon chain length of C3-10, and a molecular structure thereof has a side chain and/or an ether group.

The invention relates to a thermoplastic polyurethane obtainable by the reaction of at least the following formation components: one or more aliphatic diisocyanates A) having a molecular weight of 140 g/mol to 170 g/mol and one or more aliphatic diols B) having a molecular weight of 62 g/mol to 120 g/mol, wherein the formation components used to produce the thermoplastic polyurethane consist to an extent of at least 95% by weight of one or more aliphatic diisocyanates A) and one or more aliphatic diols B), based on the total mass of the formation components used, wherein the one or more aliphatic diisocyanates A) and the one or more aliphatic diols B) are used in a molar ratio in the range from 1.0:0.95 to 0.95:1.0, characterized in that the M.sub.z/M.sub.peak ratio of the thermoplastic polyurethane is within a range from 3 to 15, and to a process for preparation thereof, and to compositions, mouldings, films and/or fibres comprising the thermoplastic polyurethane.

The present invention relates to a melt processable thermoplastic polyurethane-urea composition formed by a continuous bulk process without the presence of solvent using a polyol component, an isocyanate component, and chain extender component comprising a hindered aromatic diamine.

The present disclosure provides a resin composition for a golf ball cover. The resin composition includes a thermoplastic polyurethane resin including 55 to 70 parts by weight of a polyol, 30 to 40 parts by weight of an isocyanate, and 0.2 to 0.4 parts by weight of a polysiloxane. The polysiloxane includes at least one hydroxyl group or a carboxyl group in the terminal alkyl group. The polyol and the isocyanate constitute a silicone-free thermoplastic polyurethane resin, and the polysiloxane and the isocyanate constitute a thermoplastic polyurethane resin that includes silicone in the main chain, thereby improving the scuff resistance and slip property required for a golf ball cover.

In an embodiment, a polyurethane comprises the residues of i. an aliphatic diisocyanate, ii. an aliphatic diol comprising a poly(ethylene oxide) moiety, iii. an aliphatic diol comprising a polycarbonate moiety, and iv. a chain extender, wherein the polyurethane has a melting temperature of 140° C. or less and has a weight average molecular weight of from 100,000 to 500,000 g/mol. In an embodiment, the polyurethane is substantially devoid of catalyst. In an embodiment, the polyurethane is formed by reactive extrusion. In an embodiment, a medical device comprises the polyurethane and a bioactive agent. The medical devices, methods, and polyurethanes may exhibit benefits in end-product biostability, drug release profile, health and safety, and processing speed or reproducibility.