US4328331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel polyester-amides
Assignee: Dow Chemical Co
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Filing: 1981-04-20
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Granted: 1982-05-04
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Expires: 2001-04-20
Abstract
Abstract Segmented thermoplastic polyester-amides are described which are prepared by reacting a polymeric diol (molecular weight in the range of 400 to 4000) with a carboxylic acid terminated prepolymer obtained by reacting an aliphatic ether diamine, optionally in admixture with a minor proportion (based on equivalents) of an alkylene diamine, with an excess of dicarboxylic acid (aromatic or aliphatic). The polyester-amides, which can be prepared preferably by the melt condensation method, have excellent physical properties and resistance to degradation by heat.
Inventors
- 👤 Augustin T. Chen
- 👤 II Robert G. Nelb
- 👤 Kemal B. Onder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:55
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
162 words
Segmented thermoplastic polyester-amides characterized by a recurring unit of the formula: ##STR10## wherein ##STR11## is the residue of a dicarboxylic acid selected from the class consisting of arylene dicarboxylic acids, alkylene dicarboxylic acids and arylenebis(alkanoic acids); from 50 to 100 percent of the R's group in said recurring unit represent the residue of a diamine having the formula: H.sub.2 N--C.sub.n H.sub.2n O--R"'--O--C.sub.n' H.sub.2n' --NH.sub.2 wherein C n H 2n and C n' H 2n' are each independently alkylene from 3 to 5 carbon atoms and R"' is alkylene having from 1 to 6 carbon atoms separating the valencies; and from 50 to 0 percent of the R' groups in said recurring unit represent the residue of at least one aliphatic diamine having from 2 to 12 carbon atoms; R" is the residue of a polymeric diol HO--R"--OH having a molecular weight from about 400 to about 4000; and m is a number having an average value from about 1 to about 20.
Claim 2
Dependent Claim
162 words
Segmented thermoplastic polyester-amides characterized by a recurring unit of the formula: ##STR10## wherein ##STR11## is the residue of a dicarboxylic acid selected from the class consisting of arylene dicarboxylic acids, alkylene dicarboxylic acids and arylenebis(alkanoic acids); from 50 to 100 percent of the R's group in said recurring unit represent the residue of a diamine having the formula: H.sub.2 N--C.sub.n H.sub.2n O--R"'--O--C.sub.n' H.sub.2n' --NH.sub.2 wherein C n H 2n and C n' H 2n' are each independently alkylene from 3 to 5 carbon atoms and R"' is alkylene having from 1 to 6 carbon atoms separating the valencies; and from 50 to 0 percent of the R' groups in said recurring unit represent the residue of at least one aliphatic diamine having from 2 to 12 carbon atoms; R" is the residue of a polymeric diol HO--R"--OH having a molecular weight from about 400 to about 4000; and m is a number having an average value from about 1 to about 20.
Claim 3
Dependent Claim
20 words
A segmented thermoplastic polyester-amide according to claim 1 wherein 100 percent of the R' groups are the residue of 1,4-bis(3-aminopropoxy)butane.
Claim 4
Dependent Claim
32 words
A segmented thermoplastic polyester-amide according to claim 1 wherein from 50 to 100 percent of the R' groups are the residue of 1,4-bis(3-aminopropoxy)butane and the remainder are the residue of hexamethylene diamine.
Claim 5
Dependent Claim
18 words
A segmented thermoplastic polyester-amide according to claims 2 or 3 wherein ##STR12## is the residue of terephthalic acid.
Claim 6
Dependent Claim
17 words
A segmented thermoplastic polyester-amide according to claim 1 wherein R" is the residue of a polyester diol.
Claim 7
Dependent Claim
17 words
A segmented thermoplastic polyester-amide according to claim 1 wherein R" is the residue of a polyether diol.
Claim 8
Dependent Claim
47 words
A segmented thermoplastic polyester-amide characterized by a recurring unit of the formula: ##STR13## wherein R"0 is the residue of a polymeric diol having a molecular weight of about 400 to about 4000 and m is a number having an average value of about 1 to about 20.
Claim 9
Dependent Claim
47 words
A segmented thermoplastic polyester-amide characterized by a recurring unit of the formula: ##STR13## wherein R"0 is the residue of a polymeric diol having a molecular weight of about 400 to about 4000 and m is a number having an average value of about 1 to about 20.
Claim 10
Dependent Claim
30 words
A segmented thermoplastic polyester-amide according to claim 7 wherein R" is the residue of a polyester diol having a molecular weight in the range of about 1000 to about 3000.
Claim 11
Dependent Claim
30 words
A segmented thermoplastic polyester-amide according to claim 7 wherein R" is the residue of a polyether diol having a molecular weight in the range of about 1000 to about 3000.
Claim 12
Dependent Claim
73 words
A segmented thermoplastic polyester-amide characterized by a recurring unit of the formula ##STR14## wherein A is the residue of an alkylene diamine having from 2 to 12 carbon atoms, R" is the residue of a polymeric diol having a molecular weight in the range of about 400 to about 4000, m is a number having an average value of about 1 to about 20, and m' is a number from zero to m.
Claim 13
Dependent Claim
73 words
A segmented thermoplastic polyester-amide characterized by a recurring unit of the formula ##STR14## wherein A is the residue of an alkylene diamine having from 2 to 12 carbon atoms, R" is the residue of a polymeric diol having a molecular weight in the range of about 400 to about 4000, m is a number having an average value of about 1 to about 20, and m' is a number from zero to m.
Claim 14
Dependent Claim
30 words
A segmented thermoplastic polyester-amide according to claim 10 wherein R" is the residue of a polyester diol having a molecular weight in the range of about 1000 to about 3000.
Claim 15
Dependent Claim
30 words
A segmented thermoplastic polyester-amide according to claim 10 wherein R" is the residue of a polyether diol having a molecular weight in the range of about 1000 to about 3000.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-03 | 1985-11-02 | 1986-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-03 | 1989-11-02 | 1990-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-03 | 1993-11-02 | 1994-05-04 | $7700.00 | Window Closed / Lapsed |