Polyester fiber

A textile fiber comprised of

• A. a polyetherester of
• 1. terephthalic acid, and
• 2. a diol component comprised of
• a. 1,4-cyclohexanedimethanol, and
• b. from 3 to 12 weight percent, based on the weight of the polyetherester, of poly(oxyethylene)glycol having a molecular weight in the range of 300-800,
• B. based on the weight of the polyetherester, from 0-150 weight parts per million of manganous ion,
• C. based on the weight of the polyetherester, from 20-500 weight parts per million phosphorus derived from
• 1. phosphorus acid,
• 2. phosphoric acid,
• 3. pyrophosphoric acid,
• 4. polyphosphoric acid, or a compound corresponding to the formula r1 ? ##STR26## where R.sup.1 is --H, a monovalent alkyl radical having 1-18 carbon atoms, a monovalent aryl or substituted aryl radical having 6-15 carbon atoms, or -O-R where R is --H, a monovalent alkyl radical having 1-18 carbon atoms or a monovalent aryl or substituted aryl radical having 6-15 carbon atoms,
• R.sup.2 is --H, monovalent alkyl radical having 1-18 carbon atoms, or a monovalent aryl or substituted aryl radical having 6-15 carbon atoms, provided that when R.sup.2 is alkyl, at least one of R.sup.2 has a chain of at least two unsubstituted methylene groups attached to the oxygen atom attached to phosphorus, ##STR27## where R.sup.1 and R.sup.2 are the same as above, ##STR28## where R.sup.4 is --H, a monovalent alkyl radical having 1-18 carbon atoms, or a monovalent aryl or substituted aryl radical having 6-15 carbon atoms,
• n = 1-6,
• R.sup.3 = (ch.sub.2).sub.x where x = 2-6, ##STR29## where R.sup.2 is the same as above,
• R.sup.5 is a divalent or tetravalent alkyl radical having 2-5 carbon atoms,
• m = 1 or 2, ##STR30## where R.sup.2 is the same as above,
• R.sup.6 is a divalent alkyl radical having 2-12 carbon atoms or a divalent aryl or substituted aryl radical having 6-15 carbon atoms, ##STR31## where R.sup.6 is the same as above,
• R.sup.7 is a divalent alkyl radical having 2-5 carbon atoms,
• D. based on the weight of the polyetherester, from 1000 to 5000 weight parts per million of a stabilizer effective to reduce oxidative degradation of the polyetherester corresponding to the structure ##STR32## where n is from 1 to 4,
• R.sup.8 is a radical selected from the group consisting of
• 1. neopentanetetrayltetrakis,
• 2. phosphinylidynetrioxy,
• 3. 2,4,6-trimethyl-1,3,5-benzenetriyltrimethylene,
• 4. alkylene having 1 to 5 carbon atoms,
• 5. alkyl having 1 to 12 carbon atoms,
• 6. 2,4,6-trioxo-1,2,3,4,5,6-hexahydro-S-triazine1,3,5-triyl)tris(3-oxotrimeth ylene),
• 7. [3-octadecyloxy)-3-oxopropyl],
• A is a monovalent radical selected from the group consisting of
• 1. tertiary alkyl having 4 to 8 carbon atoms,
• 2. alkyl having 8 to 22 carbon atoms, and
• 3. secondary alkyl having 12 to 24 carbon atoms,
• E. based on the weight of the polyetherester, from 25-200 weight parts per million titanium derived from a soluble tetravalent organic titanium compound.