| abstract |
A hydroxypolyfluoroalkyl-containing silane derivative having the formula NHp-(R2-NHq)r-R4--SiXx ¦¦¦ ¦¦Zz R12-pR31-qy-z WHEREIN EACH OF R1 and R3 is alkyl; each of R2 and R4 is alkylene; X is alkoxyl, alkyl, hydroxy, chlorine or hydrogen and at least one of the groups represented by X is alkoxyl, hydroxy, chlorine or hydrogen; p is 0 to 2, q is 0 or 1, r is 0 to 5, y is 1 or 2 and x is 2 or 3, provided that the sum of p and qr is at least 1 and the sum of x and y is 4; z is 1 or 2 and is equal to or less than y; and Z is a group represented by Rp5R6 ¦¦ N-(R2-N)r-R4- ¦¦ R12-pR31-q WHEREIN R1, R2, R3, R4, p, q and r are the same as above and each of R5 and R6 is a hydrogen or OH ¦ RfCH2CHCH2- and at least one of the groups represented by R5 and R6 is OH ¦ RfCH2CHCH2-, Rf being a perfluoroalkyl group: the above compound being useful as water- and oil-repellent agent. |