Abstract: Embodiments of the present disclosure are directed to polyurethane prepolymers, more particularly, to polyurethane formulations including a polyurethane prepolymer that can form polyurethanes. As an example, a polyurethane formulation can include a polyurethane prepolymer and a polyol composition including polyols, water, and a catalyst, where the polyurethane prepolymer is a reaction product of a monol and an excess amount of a polyisocyanate.

Abstract: Embodiments of the present disclosure are directed to polyurethane prepolymers, more particularly, to polyurethane formulations including a polyurethane prepolymer that can form polyurethanes. As an example, a polyurethane formulation can include a polyurethane prepolymer and a polyol composition including polyols, water, and a catalyst, where the polyurethane prepolymer is a reaction product of a monol and an excess amount of a polyisocyanate.

Abstract: An impact protection foam includes the reaction product of an isocyanate component and an isocyanate-reactive component. The isocyanate component includes at least one isocyanate. The isocyanate-reactive component includes from 20 wt % to 80 wt % of a hydrophobic polyol component and from 20 wt % to 80 wt % of a hydrophilic polyol component, based on the total weight of the isocyanate reactive component. The hydrophobic polyol component includes at least one natural oil hydrophobic polyol, and the hydrophilic polyol component includes at least a polyether polyol having a number average molecular weight from 3,000 g/mol to 10,000 g/mol and a primary hydroxyl content of at least 50 wt %. The isocyanate index is from 50-120. The foam article has a rate of energy dissipation less than 35 KN over the temperature range from 10 C to 40 C and a Shore A hardness of less than 55 at both 23° C. and ?10° C.

Abstract: Embodiments of the invention provide for viscoelastic polyurethane foams. The foams are made from reaction system which includes (a) an isocyanate reactive component, (b) a isocyanate component, (c) one or more blowing agents, (d) a catalyst component, and (e) a silicone based surfactant. The isocyanate reactive component includes at least (i) from 25 to 80% by weight of at least one polyoxyethylene capped polyoxypropylene/polyoxyethylene polyol having a combined number average equivalent weight from 1300 to 1700, a polyoxyethylene percentage of between 75% and 95% by weight of the combined amounts of polyoxypropylene and polyoxyethylene, and a primary OH percentage of between 80 and 95% of the total number of OH groups of the polyoxyethylene capped polyoxypropylene/polyoxyethylene polyol, and (ii) from 5 to 30% by weight of the isocyanate reactive component of at least one low functionality polyol having a functionality of between 1.5 and 2.

Abstract: Embodiments of the invention provide for viscoelastic polyurethane foams. The foams are made from reaction system which includes (a) an isocyanate reactive component, (b) a isocyanate component, (c) one or more blowing agents, (d) a catalyst component, and (e) a silicone based surfactant. The isocyanate reactive component includes at least (i) from 25 to 80% by weight of at least one polyoxyethylene capped polyoxypropylene/polyoxyethylene polyol having a combined number average equivalent weight from 1300 to 1700, a polyoxyethylene percentage of between 75% and 95% by weight of the combined amounts of polyoxypropylene and polyoxyethylene, and a primary OH percentage of between 80 and 95% of the total number of OH groups of the polyoxyethylene capped polyoxypropylene/polyoxyethylene polyol, and (ii) from 5 to 30% by weight of the isocyanate reactive component of at least one low functionality polyol having a functionality of between 1.5 and 2.

Abstract: A method of adhering a first component to a second component, comprising the steps of: adhering the two components together using a composition comprising a polyurethane and from 20 to 80 weight percent of a particulate metal, metal salt or metal alloy filler, wherein polyurethane is the reaction product of: a) a first polyol, the first polyol having a molecular weight of less than 1000; b) a second polyol, the second polyol having a molecular weight of from 1500 to 10000; c) at least one polyisocyanate; d) at least one curing agent, and wherein the particulate metal, metal salt or metal alloy filler has a thermal conductivity of at least 150 watts/m·° K; and curing the composition.

Abstract: A composition comprising a polyurethane and from 20 to 80 weight percent of a particulate metal or metal alloy filler, wherein polyurethane is the reaction product of a first polyol having a molecular weight of less than 1000, a second polyol having a molecular weight of from 1500 to 10000, and at least one polyisocyanate, and wherein the particulate metal or metal alloy filler has a thermal conductivity of at least 150 watts/m·° K, a mould made therefrom and a method of producing such a mould.