Hydroxypolyfluoroalkyl-containing silane derivatives and manufacturing the same

The hydroxypolyfluoroalkyl-containing silane derivative having the formula ##EQU44## wherein each of R.sup.2 and R.sup.4 is an alkylene group having 1 to 5 carbon atoms;

• X' is an alkoxyl group having 1 to 5 carbon atoms or alkyl group having 1 to 5 carbon atoms and at least one of the groups represented by X' is an alkoxyl group having 1 to 5 carbon atoms;
• r is zero or an integer of 1 to 5, y is an integer of 1 or 2 and x is an integer of 2 or 3, provided that the sum of x and y is 4;
• z is an integer of 1 or 2 equal to or less than that represented by y;
• and each of R.sup.5, R.sup.6 and R.sup.7 is a hydrogen atom or ##EQU45## and at least one of the groups represented by R.sup.5, R.sup.6 and R.sup.7 is ##EQU46## R.sub.f being a perfluoroalkyl group having 3 to 21 carbon atoms.

A process for producing a hydroxypolyfluoroalkyl-containing silane derivative, which comprises reacting a perfluoroalkylpropylene epoxide having the formula ##EQU48## wherein R.sub.f is a perfluoroalkyl group having 3 to 21 carbon atoms with an aminoalkyl silane derivative having the formula ##EQU49## wherein each of R.sup.1 and R.sup.3 is an alkyl group having 1 to 5 carbon atoms;

• each of R.sup.2 and R.sup.4 is an alkylene group having 1 to 5 carbon atoms;
• X is an alkoxyl group having 1 to 5 carbon atoms, alkyl group having 1 to 5 carbon atoms, hydroxyl group, chlorine atom or hydrogen atom and at least one of the groups represented by X is an alkoxyl group having 1 to 5 carbon atoms, hydroxyl group, chlorine atom or hydrogen atom;
• and p is zero or an integer of 1 or 2, q is zero or an integer of 1, r is zero or an integer of 1 to 5, y is an integer of 1 or 2 and x is an integer of 2 or 3, provided that the sum of p and qr is at least 1 and the sum of x and y is 4;
• each of said R.sup.2, R.sup.4 and X being different or same when plural in number.