Patent ID: RE43651

Claim:
A method of coating a surface with a polymer layer, which method comprises exposing said surface to a pulsed plasma comprising a compound of formula (I) where R 1 , R 2 and R 3 are independently selected from hydrogen, alkyl, haloalkyl or aryl optionally substituted by halo, provided that at least one of R 1 , R 2 and R 3 is hydrogen, and R 4 is a group X—R 5 , where R 5 is an alkyl or haloalkyl group, and X is: a bond; or a group of formula —C(O)O(CH 2 ) n Y— where n is an integer of from 1 to 10 and Y is a bond or a sulphonamide group; or a group —(O) p R 6 (O) q (CH2) t — where R 6 is aryl optionally substituted by halo, p is 0 or 1, q is 0 or 1 and t is 0 or an integer of from 1 to 10, provided that where q is 1, t is other than 0; so as to form an oil and/or water repellent coating on said surface.