Polyester yarn finish composition

An overfinish composition for polyester yarn, said composition comprising:

• a. about 60 to 90 weight percent of water;
• b. about 0.3 to 1 weight percent of gamma-glycidoxypropyltrimethoxysilane;
• c. about 0.05 to 4.0 weight percent of a catalyst selected from the group consisting of urea and a solution of a stannous, iron, nickel, zinc, manganese or chromium salt of 2-ethylhexoic acid or lauric acid in a carrier which is miscible in water;
• and
• d. about 6.5 to 38.6 weight percent of a compatible noncontinuous phase.

In a process for the production of polyester yarn involving spinning and drawing steps, the improvement which comprises:

• treating the yarn subsequent to the drawing step with an overfinish composition which comprises:
• a. about 60 to 90 weight percent water;
• b. about 0.3 to 10 weight percent of gamma-glycidoxypropyltrimethoxysilane;
• c. about 0.05 to 4.0 weight percent of a catalyst selected from the group consisting of urea and a solution of a stannous, iron, nickel, zinc, manganese or chromium salt of 2-ethylhexoic acid or lauric acid in a carrier which is miscible in water;
• and
• d. about 6.5 to 38.6 weight percent of a compatible noncontinuous phase.

An overfinish composition for polyester yarn, said composition comprising:

• a. about 60 to 90 weight percent of water;
• and
• b. the balance a nonaqueous portion comprising:
• 1. about 0.3 to 10 weight percent of the composition of a silane having the structural formula ##STR4##
• wherein n=2 to 5;
• 2. about 0.00025 to 0.8 weight percent of the composition of a catalyst for the silane selected from the group consisting of manganese, iron, nickel, chromium, tin and molybdenum salts of a mono- or polyfunctional organic acid wherein each acid function moiety has 4 to 30 carbon atoms;
• cobalt naphthenate;
• and cobalt neodecanoate;
• and
• 3. about 6.5 to 38.6 weight percent of the composition of a compatible noncontinuous phase.

In a process for the production of polyester yarn involving spinning and drawing steps, the improvement which comprises:

• treating the yarn subsequent to the drawing step with an overfinish composition which comprises:
• a. about 60 to 90 weight percent water;
• and
• b. the balance a nonaqueous portion comprising:
• 1. about 0.3 to 10 weight percent of the composition of a silane having the structural formula ##STR5##
• wherein n=2 to 5;
• 2. about 0.00025 to 0.8 weight percent of the composition of a catalyst for the silane selected from the group consisting of manganese, iron, nickel, chromium, tin and molybdenum salts of a mono- or polyfunctional organic acid wherein each acid function moiety has 4 to 30 carbon atoms;
• cobalt naphthenate;
• and cobalt neodecanoate;
• and
• 3. about 6.5 to 38.6 weight percent of the composition of a compatible noncontinuous phase.