Patent ID: 8574394

Claim:
A method of forming a moisture curable hot melt adhesive comprising: forming an isocyanate terminated prepolymer by reacting at least one of 4,4′ methylene bisphenyl diisocyanate (MDI), hydrogenated 4,4′ methylene bisphenyl diisocyanate (MDI) and hexamethylene diisocyanate with at least one polyol, wherein the polyol is not a polyhydroxy ester of alkyl fatty acids or an ethylene oxide adduct of a polyol, and (ii) chain extending said prepolymer by reaction with a chain extender including at least one of ethylene glycol, 1,4-butane diol, 1,6-hexane diol, 1,4-bis(hydroxymethyl)cyclohexane, p-di(2-hydroxyethoxy)benzene, m-di(2-hydroxyethoxy)benzene (HER), trimethylolpropane (TMP) and 2,4-diamino-3,5-diethyltoluene to form an isocyanate terminated moisture curable hot melt adhesive.