Retroreflective articles include a layer of optical elements, and a polyurethane bead bond layer. The optical elements include transparent microspheres, and at least one reflective layer. The polyurethane bead bond layer is the reaction product of a reaction mixture of at least one aliphatic polycarbonate polyol and at least one polyisocyanate, and the reaction mixture is free of polyols containing unsaturated groups. The retroreflective articles have improved wash durability.

The present invention provides polyurethanes including a reaction product of components including: (a) about 1 equivalent of at least one polyisocyanate; (b) about 0.05 to about 0.9 equivalents of at least one branched polyol having 4 to 18 carbon atoms and at least 3 hydroxyl groups; and (c) about 0.1 to about 0.95 equivalents of at least one diol having 2 to 18 carbon atoms, wherein the reaction product components are essentially free of polyester polyol and polyether polyol and the reaction components are maintained at a temperature of at least about 100 C. for at least about 10 minutes, compositions, coatings and articles made therefrom and methods of making the same.

This invention relates to biocompatible, biodegradable thermoplastic polyurethane or polyurethane/ureas comprising isocyanate, polyol and a conventional chain extender and/or a chain extender having a hydrolysable linking group and their use in tissue engineering and repair applications, particularly as stents and stent coating.

The invention relates to the use of carbodiimide-containing compositions for controlling pot life in the production of polyurethane (PU)-based systems, preferably PU elastomers, PU adhesives, PU casting resins or PU foams.

Disclosed is a polyurethane for use in a polishing layer, including a carboxylic acid ester group, and a polyurethane preferably having a carboxylic acid ester group in at least one of a side chain, a main chain terminal, and a main chain skeleton is preferably used. Also disclosed is a method for modifying a polishing layer, including the steps of: preparing a polishing layer including a polyurethane having a carboxylic acid ester group; and hydrolyzing the carboxylic acid ester group of the polyurethane, to produce a carboxyl group.

Disclosed is a structural material-bonding adhesive capable of bonding materials other than iron, and maintaining the bonding ability in an environment at a high temperature and a low temperature, while maintaining performance similar to that of a structural material adhesive used as an adhesive for bonding iron materials. A curable resin composition contains an epoxy resin, blocked urethane, and an amine-based latent curing agent, wherein the blocked urethane is obtained by reacting a urethane polymer having a terminal isocyanate group with a blocking agent, the urethane polymer being obtained by reacting a polyisocyanate, a diol, and a branching agent containing at least three groups that react with an isocyanate group.

Provided is an aqueous coating composition which has excellent storage stability and whereby high coating film performance in terms of hardness, water resistance, etc., can be exhibited even when the aqueous coating composition is cured at a relatively low temperature. Disclosed is an aqueous coating composition which contains (A) a resin containing hydroxyl groups and carboxyl groups, (B) a blocked polyisocyanate compound, (C) a phosphate-group-containing compound, and (D) a basic compound, and which has a pH in the range of 7.0-8.2, wherein the basic compound (D) contains a specific quantity of (D1) a basic compound which has an acid dissociation constant (PKa) in the range of 7.0-8.5 and a boiling point in the range of 100-200 C.

A golf ball comprising an acid functional thermoplastic polyurethane resin is disclosed herein. A golf ball comprising an acid functional thermoplastic polyurethane material is disclosed herein. The golf balls include polyols, isocyanates, and acid functional compositions. The golf ball compositions include preferred weight average molecular weights and number average molecular weights.

A reactive formulation and method for forming a thermoplastic polyurethane (TPU) having a glass transition temperature (Tg) above room temperature, preferably a Tg higher than 40 C., more preferably higher than 55 C., a flexural modulus in the range 300-15000 MPa-(measured according to ISO 178), most preferably in the range 1500-2700 MPa and a tensile strength at break (according to DIN 53504) in the range of 5 up to 150 MPa is disclosed. Said reactive formulation comprising at least an isocyanate composition and an isocyanate-reactive composition comprising at least an aromatic dicarboxylic acid based diol chain extender having a molecular weight<500 g/mol and optionally fillers.

Furthermore, a TPU material having a glass transition temperature (Tg)>room temperature and a flexural modulus in the range 300-15000 MPa (measured according to ISO 178) is disclosed which is thermally recyclable and optionally made from a terephthalic acid based polyester diol chain extender made from recycled PET.

The invention relates to a curable amphiphilic siloxane polyurethane coating composition. The invention also relates to methods of making and using the curable amphiphilic siloxane polyurethane coating composition of the invention. The invention also relates to methods for reducing or preventing biofouling of a surface exposed to an aqueous environment comprising the use of the curable amphiphilic siloxane polyurethane coating composition of the invention.