| abstract |
adhesive composition, a method for bonding two or more substrates, and bonded assembly. An adhesive composition is provided comprising: (a) a polyisocyanate component comprising: (i) monomeric 4,4'-methylene diphenyl diisocyanate, and (ii) a functional isocyanate prepolymer which is the product A reaction mixture of a prepolymer reagent mixture comprising: (a) monomeric 4,4'-methylene diphenyl diisocyanate, and (b) one or more polyols, wherein the amount of 2,2 'diphenyl diisocyanate monomeric methylene in said prepolymer reactant mixture is 1% or less by weight based on the weight of said prepolymer reactant mixture; wherein the amount of monomeric 2,2'-methylene diphenyl diisocyanate in said polyisocyanate component is 1% or less by weight based on the weight of said isocyanate component; and (b) a polyol component comprising one or more polyols. Also provided is a method of bonding two or more substrates, which comprises placing such an adhesive composition in contact with both said two or more substrates. There is further provided a bonded assembly comprising two or more substrates bonded together by such an adhesive composition. |