Textile fiber finishes

Abstract

Melt-spin finish compositions composed of 1 - 99% by weight of compounds having the general formula ##STR1## wherein R.sup.1 is a mono-, di- or trialkylphenyl residue, in which the sum of the carbon atoms per phenyl residue, bound in the form of alkyl residues, is at least 6 and at most 12, and/or the trimethylsilyl residue, R.sup.2 is an alkyl residue with 1 to 16 carbon atoms, whereby the carbon chain may be interrupted by the groupings ##STR2## and/or the M.sub.a -O-R.sup.3 residue, whereby R.sup.3 is a mono-, di- or trialkylphenyl residue, whereby the sum of the carbon atoms per phenyl residue, bound in the form of alkyl residues, is at least 6 and at most 12, and/or is the ##STR3## residue, R.sup.4 is an alkyl residue with 1 to 16 carbon atoms and/or ##STR4## M is an alkyl residue with 1 to 3 carbon atoms, the index N MAY HAVE ANY VALUE FROM 2.5 TO 15, m a value of 0 to 5, and a a value of 0 or 1, And the average molecule contains 5 to 30 Si atoms of which at most 20 mole percent are Si* atoms, and 0.5 to 10 mono-, di- or trialkylphenyl residues, in addition to 99 - 1% by weight of known finish components. The finish compositions of the present invention possess not only exceptional thermal stability but also confer excellent frictional properties to the melt-spun fibers.

Dependencies are inferred from the claim text.