Described herein is an electrically dissipative polyurethane foam and a method of using the electrically dissipative polyurethane foam in trench breakers or pipeline pillows.

A moisture curable polyurethane hot melt adhesive composition and a process for making the same are disclosed. The moisture curable polyurethane hot melt adhesive composition includes an isocyanate-terminated polyurethane prepolymer that is the reaction product of a diisocyanate monomer component that includes at least 20% by weight asymmetrical diisocyanate monomer based on the weight of the diisocyanate monomer component and symmetrical diisocyanate monomer, at least one polyol having a number average molecular weight greater than 1000 g/mole, a monofunctional compound that includes one isocyanate-reactive group and has a molecular weight no greater than 400 g/mole, and a multifunctional compound that includes at least two isocyanate-reactive groups and has a molecular weight no greater than 400 g/mole.

A moisture curable polyurethane hot melt adhesive composition and a process for making the same are disclosed. The moisture curable polyurethane hot melt adhesive composition includes an isocyanate-terminated polyurethane prepolymer that is the reaction product of a diisocyanate monomer component that includes at least 20% by weight asymmetrical diisocyanate monomer based on the weight of the diisocyanate monomer component and symmetrical diisocyanate monomer, at least one polyol having a number average molecular weight greater than 1000 g/mole, a monofunctional compound that includes one isocyanate-reactive group and has a molecular weight no greater than 400 g/mole, and a multifunctional compound that includes at least two isocyanate-reactive groups and has a molecular weight no greater than 400 g/mole.

Disclosed are a sulfonic acid-modified polyisocyanate and a preparation method thereof. By controlling a content of cyclohexylamine component in the raw material, the reaction rate of sulfamic acid and polyisocyanate is accelerated, so that the prepared product has advantages of light color and low turbidity as well as good storage stability.