Two-component polyurethane adhesive composition

A two-component thermally-conductive polyurethane adhesive mixture, comprising:

• (A) Component A comprising:
• (ai) an NCO-terminated prepolymer made by reacting at least one polyether mono-ol of molecular weight (Mn) greater than 800 Da with at least one polyisocyanate selected from aliphatic polyisocyanates and mixtures of 2,4′-methylene-bis-(phenyl isocyanate) (MDI) and 4,4′-MDI;
• and
• (B) Component B comprising:
• (bi) at least one polyol;
• and
• (bii) a catalyst capable of catalyzing the reaction of OH groups with NCO groups;
• wherein Component A and/or Component B further comprise aluminum trihydroxide (ATH) in an amount such that when Component A and B are mixed to produce the adhesive mixture, the content of ATH in the adhesive mixture is at least 40 wt. % based on the total weight of the adhesive mixture, and wherein Component A and/or Component B comprise alumina in an amount such that when Component A and B are mixed to produce an adhesive mixture, the content of alumina in the adhesive mixture is at least 15 wt. % based on the total weight of the adhesive mixture.