Patent ID: 6238449
Filing Date: 2001-05-29
Classification: B24D

Abstract:
An abrasive article comprising:a backing having a first and a second major surface;a structured abrasive coating adhered to the first major surface of the backing the abrasive coating comprising a plurality of precisely shaped abrasive composites each of said composites comprising a plurality of abrasive particles dispersed in a binder wherein the binder comprises the reaction product of:a binder precursor; andat least one reactive siloxane polymer having at least one functional group which reacts with the binder precursor, the reactive siloxane polymer represented by formula (I), or formula (II) wherein formula (I) is: ##STR14##where n is 50 to 1000; andwherein R.sub.2 is independently methyl, ethyl, or phenyl; andwherein R.sub.1 is: ##STR15##where n.sub.1 is an integer from 3 to 12 and where n.sub.2 is an integer from 0 to 10; andwherein R.sub.3 is:an aliphatic group having from 1 to 10 carbon atoms,an aromatic group, ##STR16##where n.sub.1 is an integer from 3 to 12 and where n.sub.2 is an integer from 0 to 10; andwherein formula (II) is: ##STR17##wherein X is: ##STR18##where X has a terminal oxygen atom which is connected to the silicon atom of formula (II) and where n.sub.3 is an integer from 5 to 500 and where R.sub.4 is independently methyl, ethyl or phenyl;wherein R.sub.5 is independently: ##STR19##where n.sub.4 is an integer from 3 to 12 and where n.sub.5 is an integer from 0 to 10.