Patent US4401804A successfully refreshed from Google Patents.
US4401804A
Expired / Lapsed
US
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Deactivation of polyester catalyst residues
Assignee: Eastman Chemical Co
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Filing: 1982-05-24
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Granted: 1983-08-30
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Expires: 2002-05-24
Abstract
Abstract A process is provided for deactivation of catalyst residues in polyester compositions. The polyester compositions are provided by polymerizing diols and diacids, or mixtures of such diols and diacids, to form polyester compositions. The polymerization is carried out in the presence of a polymerization catalyst that leaves traces of such catalyst residues in the polyester composition. These catalyst residues can adversely affect the further processing and end use of the polyester composition. The present process provides deactivation of the catalyst residues by the use of a combination of a mono- or dihydrogen phosphonate or mono-, di-, or trihydrogen phosphate compound and a di- or triester phosphonate compound or a phosphite compound.
Inventors
- 👤 Willis C. Wooten
- 👤 Joseph S. Zannucci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:40
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/88
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
66 words
A process for deactivating polymerization catalyst residues which form color bodies with phenolic stabilizers which comprises contacting polymeric compositions containing said polymerization catalyst residues with at least one member selected from the group consisting of mono- or dihydrogen phosphonate and mono-, di-, or trihydrogen phosphate compounds and at least one member selected from the group consisting of di- and triester phosphonate compounds or a phosphite compound.
Claim 2
Dependent Claim
66 words
A process for deactivating polymerization catalyst residues which form color bodies with phenolic stabilizers which comprises contacting polymeric compositions containing said polymerization catalyst residues with at least one member selected from the group consisting of mono- or dihydrogen phosphonate and mono-, di-, or trihydrogen phosphate compounds and at least one member selected from the group consisting of di- and triester phosphonate compounds or a phosphite compound.
Claim 3
Dependent Claim
19 words
A process for deactivating polymerization catalyst residues according to claim 1 wherein said phosphite compound is distearyl pentaerythritol diphosphite.
Claim 4
Dependent Claim
18 words
A process for deactivating polymerization catalyst residues according to claim 3 wherein said phosphorous compound is phosphoric acid.
Claim 5
Dependent Claim
19 words
A process for deactivating polymerization catalyst residues according to claim 2 wherein said phosphorus compound is poly(ethylene hydrogen phosphate).
Claim 6
Dependent Claim
82 words
A process for deactivating polymerization catalyst residues which form color bodies with phenolic stabilizers which comprises contacting polymeric compositions containing said polymerization catalyst residues with about 0.01 to about 0.5 weight percent of at least one member selected from the group consisting of mono- or dihydrogen phosphonate and mono-, di-, or trihydrogen phosphate compounds and about 0.05 to about 0.75 weight percent of at least one member selected from the group consisting of di- and triester phosphonate compounds or a phosphite compound.
Claim 7
Dependent Claim
82 words
A process for deactivating polymerization catalyst residues which form color bodies with phenolic stabilizers which comprises contacting polymeric compositions containing said polymerization catalyst residues with about 0.01 to about 0.5 weight percent of at least one member selected from the group consisting of mono- or dihydrogen phosphonate and mono-, di-, or trihydrogen phosphate compounds and about 0.05 to about 0.75 weight percent of at least one member selected from the group consisting of di- and triester phosphonate compounds or a phosphite compound.
Claim 8
Dependent Claim
19 words
A process for deactivating polymerization catalyst residues according to claim 5 wherein said phosphite compound is distearyl pentaerythritol diphosphite.
Claim 9
Dependent Claim
18 words
A process for deactivating polymerization catalyst residues according to claim 6 wherein said phosphorous compound is phosphoric acid.
Claim 10
Dependent Claim
19 words
A process for deactivating polymerization catalyst residues according to claim 7 wherein said phosphorous compound is poly(ethylene hydrogen phosphate).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |