US4252920A
Expired / Lapsed
US
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Method for preparing ether-ester-amide block polymers for among other moulding, extruding or spinning uses
Assignee: ATO Chimie SA
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Filing: 1978-08-31
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Granted: 1981-02-24
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Expires: 1998-08-31
Abstract
Abstract Process for preparing ether-ester-amide block polymers. It consists in the reaction, in the molten state of a dicarboxylic polyamide having COOH end groups with a polyoxyalkylene glycol having hydroxyl end groups in the presence of metallic tetraalkoxide(s) as catalysts. The tetraalkoxide(s) used are of the formula M(OR) 4 where M is Zr or Hf and the radicals R, identical or different are linear or branched C 1 -C 24 alkyl radicals.
Inventors
- 👤 Gerard Deleens
- 👤 Jacques Ferlampin
- 👤 Michele Gonnet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:17
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44; Y; Y10; Y10S; Y10S525/00; Y10S525/926
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
87 words
A process for preparing ether-ester-amide block polymer comprising reacting in the molten state a dicarboxylic polyamide, the COOH functions of which are located at the ends of the chain, with a polyalkylene glycol having hydroxyl end groups, in the presence of one or more metallic tetraalkoxides as catalyst, wherein the tetraalkoxide(s) used as the catalyst have the general formula M(OR) 4 , in which M is zirconium or hafnium and the symbols R, identical or different, are linear or branched C 1 to C 24 alkyl radicals.
Claim 2
Dependent Claim
87 words
A process for preparing ether-ester-amide block polymer comprising reacting in the molten state a dicarboxylic polyamide, the COOH functions of which are located at the ends of the chain, with a polyalkylene glycol having hydroxyl end groups, in the presence of one or more metallic tetraalkoxides as catalyst, wherein the tetraalkoxide(s) used as the catalyst have the general formula M(OR) 4 , in which M is zirconium or hafnium and the symbols R, identical or different, are linear or branched C 1 to C 24 alkyl radicals.
Claim 3
Dependent Claim
32 words
A process according to claim 1, wherein the symbols R, identical or different, of the formula defining the zirconium or hafnium tetraalkoxides are alkyl radicals in C 1 to C 8 .
Claim 4
Dependent Claim
59 words
A process according to claim 1, wherein the catalyst comprises the combination of one or more of the tetraalkoxides with one or more alcoholates of formula (R 1 O.sub.) p Y in which Y is an alkaline or alkaline-earth metal, p is the valence of Y and R 1 is a monovalent C 1 to C 24 alkyl radical.
Claim 5
Dependent Claim
18 words
A process according to claim 3, wherein R 1 is a C 1 to C 8 alkyl radical.
Claim 6
Dependent Claim
33 words
A process according to claims 1, 2, 3, or 4, wherein the catalyst proportion varies from 0.01 to 5%, and preferably from 0.05 to 2% by weight of dicarboxylic polyamide and polyoxyalkylene glycol.
Claim 7
Dependent Claim
24 words
A process according to claims 1, 2, 3, or 4, wherein the average molecular weight of the dicarboxylic polyamide is between 300 and 1500.
Claim 8
Dependent Claim
17 words
A process according to claim 8, wherein the said average molecular weight is between 800 and 5000.
Claim 9
Dependent Claim
20 words
A process according to claim 6, wherein the average molecular weight of the polyoxyalkylene glycol is between 100 and 6000.
Claim 10
Dependent Claim
16 words
A process according to claim 8, wherein the average molecular weight is between 200 and 3000.
Claim 11
Dependent Claim
30 words
A process according to claim 1, wherein the weight proportion of polyoxyalkylene glycol to the total weight of the reacted dicarboxylic polyamide and polyoxyalkylene glycol is between 5 and 85%.
Claim 12
Dependent Claim
17 words
A process according to claim 10, wherein in the said weight proportion is between 10 and 50%.
Claim 13
Dependent Claim
37 words
A process according to claim 1, wherein the temperature selected for performing the reaction in the molten state, which is higher than the melting points of dicarboxylic polyamide and polyoxylakylene glycol, is between 100° and 400° C.
Claim 14
Dependent Claim
16 words
A process according to claim 12, wherein the said temperature is between 200° and 300° C.
Claim 15
Dependent Claim
37 words
A process according to claim 1, wherein the reaction in the molten state is performed under a vacuum of about 0.05 to 5 mmHg, or under an inert atmosphere at a pressure of about the atmospheric pressure.
Claim 16
Dependent Claim
19 words
Ether-ester-amide block polymers obtained by the method according to claims 1, 2, 3,4, 10, 11, 12, 13, or 14.
Claim 17
Dependent Claim
9 words
An article molded from a polymer of claim 15.
Claim 18
Dependent Claim
9 words
An article extruded from a polymer of claim 15.
Claim 19
Dependent Claim
9 words
A fiber spun from a polymer of claim 15.
References Cited (Backward Citations)
US3636135A
Cited
US3655821A
Cited
US3839245A
Cited
CA972896A
Cited
US3923925A
Cited
FR2273021B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |