abstract |
A printable release coating comprising a siloxane block copolymer that is the reaction product of (a) a polydimethylsiloxane free of thio, mercapto, and fluorine groups and (b) an organic diisocyanate. Also, a method of making a siloxane block copolymer for use as a printable release coating, the method including reacting a polydimethylsiloxane with an organic diisocyanate and a chain extender. |