| abstract |
A composition for modifying a surface of a substrate, the composition comprising: (a) a first polyfluoropolyether silane of the Formula Ia: CF 3 CF 2 CF 2 O(CF(CF 3 )CF 2 O) p CF(CF 3 )—C(O)NH(CH 2 ) 3 Si(Y) 3 wherein each Y is independently a hydrolyzable group and wherein p is 3 to 50; and (b) a second polyfluoropolyether silane of the Formula IIa: (Y′) 3 Si(CH 2 ) 3 NHC(O)—CF 2 O(CF 2 O) m (C 2 F 4 O) q CF2-C(O)NH(CH 2 ) 3 Si(Y′) 3 wherein each Y′ is independently a hydrolyzable group and wherein m is 1 to 50 and q is 3 to 40. A method of making a medicinal inhalation device or a component of a medicinal inhalation device comprising a step of applying to at least a portion of a surface of the device or the component, respectively, the composition. |