| abstract |
The present invention provides composition for treating a substrate comprising a homogeneous mixture of:(a) a fluorinated polyether silane of the formula:Rf1-[-Q-SiY¿3-xR?1x]y (I)wherein Rf1 represents a monovalent or divalent polyfluoropolyether group, Q represents an organic divalent linking group, R1 represents a C¿1?-C4 alkyl group, Y represents a hydrolysable group; x is 0 or 1 and y is 1 or 2;(b) an organic or an inorganic acid;(c) water and(d) an organic solvent.The invention further provides a method of making such a composition and the use thereof to treat substrates to render them oil and water repellent. |