초록

A molded abrasive article comprising abrasive particles dispersed throughout and adhered within a crosslinked polyurethane binder matrix having a glass transition temperature greater than about 10°C. and a glass transition temperature range of greater than about 70°C.

대표청구항 ▼

A molded abrasive article comprising: (a) a smear-resistant, elastomeric, crosslinked polyurethane binder matrix comprised of the polymerization reaction product of a solvent-free polymerizable mixture comprising: (i) short-chain, active hydrogen functional monomer having an average active hydrogen

A molded abrasive article comprising: (a) a smear-resistant, elastomeric, crosslinked polyurethane binder matrix comprised of the polymerization reaction product of a solvent-free polymerizable mixture comprising: (i) short-chain, active hydrogen functional monomer having an average active hydrogen functionality of from about 2 to 8 and an average molecular weight less than about 400, (ii) long-chain, active hydrogen functional, diene prepolymer having an average active hydrogen functionality of from about 2 to 4 and an average molecular weight from about 400 to 25,000, (iii) polyisocyanate having an average isocyanate functionality of from about 2 to 4, and (iv) crosslinking initiator which induces crosslinking between unsaturation sites on adjacent diene prepolymer residues, said reaction product having a glass transition temperature of at least about 10°C. and a glass transition temperature range of at least about 70°C. when cured; and (b) particles of abrasive material dispersed throughout and adhered within said polyurethane binder matrix.