Title: Production of thermally stabilized polyester

Abstract: High molecular weight linear condensation polyesters are stabilized against deterioration by heat by reacting the polyester in molten form with an epoxy compound having 5 to 25 carbon atoms in the molecule and selected from the group consisting of ##STR1## where R represents the radical remaining after removal of the carboxyl group from a monocarboxylic acid, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represent hydrogen or hydrocarbon radicals, and n is an integer that can be 0 to 3.

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Inventors: Lazarus, Stanley D. (Petersburg, VA, US)
Chakravarti, Kalidas (Richmond, VA, US)

Application Number: 889572
Filing Date: 1978-03-23
Publication_date: 1978-12-19
Assignee: Allied Chemical Corporation (Morris Township, Morris County, NJ)
Primary Class(es): 525/437 264/211, 524/114
Other Classes:
US Patent Ref:

3268482	Aug, 1966	Piirma et al.	260/75.
3275583	Sep, 1966	Kloos	260/75.
3650997	Mar, 1972	Weisfeld et al.	260/22.
3673144	Jun, 1972	Weissermel et al.	260/75.
3886104	May, 1975	Borman et al.	260/22.
3985705	Oct, 1976	Georgoudis	260/45.
4016142	Apr, 1977	Alexander et al.	260/75.

Other Refs:
Primary Examiner: Phynes, Lucille M.
Assistant Examiner:
Attorney: Kelly; Fred L.