초록 ▼

Bonded abrasive compositions, articles incorporating same, and methods of making the compositions and articles are presented, the compositions comprising abrasive particles dispersed throughout and adhered within an elastomeric polyurea matrix. The polyurea matrix is formed from the polymerization r

Bonded abrasive compositions, articles incorporating same, and methods of making the compositions and articles are presented, the compositions comprising abrasive particles dispersed throughout and adhered within an elastomeric polyurea matrix. The polyurea matrix is formed from the polymerization reaction product of a polyfunctional amine and an isocyanate. The compositions exhibit excellent smear- and wear-resistance, and may be attached to a variety of backings. One preferred backing is integrally molded to the bonded abrasive composition.

대표청구항 ▼

A bonded abrasive composition comprising: a) a cured smear-resistant and wear-resistant elastomeric polyurea binder matrix having urea linkages, the binder matrix selected from the group consisting of; 1) the reaction product of a first polyfunctional amine having an average functionality of 2 and a

A bonded abrasive composition comprising: a) a cured smear-resistant and wear-resistant elastomeric polyurea binder matrix having urea linkages, the binder matrix selected from the group consisting of; 1) the reaction product of a first polyfunctional amine having an average functionality of 2 and an equivalent weight of at least about 300, said first polyfunctional amine being capable on polymerization of forming a first soft segment, and a polyfunctional isocyanate having an average isocyanate functionality of at least 2 and an equivalent weight of less than about 300, said poly functional isocyanate being capable on polymerization of forming a first hard segment; and 2) the reaction product of a polyfunctional isocyanate prepolymer having a functionality of at least 2 and having an equivalent weight of at least about 300, said polyfunctional isocyanate prepolymer being capable on polymerization of forming a second soft segment, and a second polyfunctional amine having an average functionality of at least 2 and an equivalent weight of less than about 300, said second polyfunctional amine being capable on polymerization of forming a second hard segment; and, b) an effective amount of abrasive particles dispersed throughout said binder matrix.