Reduction of carboxyl end groups in polyester fibers with lactim

Details Reduction of carboxyl end groups in polyester fibers with lactim Reduction of carboxyl end groups in polyester fibers with lactim

1988-02-29

1989-06-13

Lorin, Hubert

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

2641761, 26421112, D01F 662, D01F 110

Patent

active

048391247

ABSTRACT:
An improved process for controlling and reducing the concentration of free carboxyl end groups in condensation polyester melt spun fiber is provided. By selection of a multifunctional compound, it is possible to increase the intrinsic viscosity of the fiber. The process comprises admixing and reacting with molten polyester polymer an effective amount of a lactim compound of the formula ##STR1## wherein n is an integer of 2 to 15;

REFERENCES:
patent: 2465319 (1949-03-01), Whinfield et al.
patent: 3051212 (1962-08-01), Daniels
patent: 4016142 (1927-04-01), Alexander et al.
patent: 4080360 (1978-03-01), Schlichting et al.
patent: 4442058 (1984-04-01), Griffith et al.
patent: 4543396 (1985-09-01), Arai et al.

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