The invention describes a process for reducing the surface energy of organic materials such as for example increasing the oil and water repellency and stain release of organic materials, which comprises treating the organic material with at least a compound of the formula I wherein the general symbols are as defined in claim 1; especially wherein at least one of the radicals R
2
, R
3
or R
4
is —CH(R
11
)—S(O)
p
—R
12
; R
11
is hydrogen, C
1
-C
8
alkyl, unsubstituted or with C
1
-C
4
alkyl substituted phenyl; R
12
is a monovalent perfluorinated alkyl or alkenyl, linear or branched organic radical having four to twenty fully fluorinated carbon atoms, and p is 0, 1 or 2.
该发明描述了一种降低有机材料表面能的过程,例如增加有机材料的油
水抗性和防污性,并使其具有去污性,该过程包括用式I中至少一种化合物处理有机材料,其中一般符号如权利要求书中所定义;特别是其中至少一个基团R2、R3或R4是-CH(R11)-S(O)p-R12;R11是氢、C1-C8烷基,未取代或与C1-C4烷基取代的苯基;R12是具有四到二十个
全氟碳原子的单价
全氟烷基或烯烃基,线性或支链有机基团,p为0、1或2。