Patent US4649180A successfully refreshed from Google Patents.
US4649180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide-poly-carbonate block copolymers
Assignee: Dow Chemical Co
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Filing: 1986-03-17
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Granted: 1987-03-10
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Expires: 2006-03-17
Abstract
Abstract Substantially linear, segmented polyester-amides are disclosed which contain aromatic residues in the hard segments and as soft segments the residues of polycarbonate diols of molecular weight from about 400 to about 4000. The polymers are characterized by the unexpected combination of excellent hydrolytic stability, thermal stability, and low temperature flexibility.
Inventors
- 👤 Augustin T. Chen
- 👤 Kemal Onder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:55
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44; Y; Y10; Y10S; Y10S528/00; Y10S528/906
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
130 words
A substantially linear segmented thermoplastic polyester-amide characterized by the combination of excellent hydrolytic stability, thermal stability, and low temperature flexibility, said polyester-amide having a recurring unit of the formula: wherein Ar is an arylene radical, P is the residue of a precursor polycarbonate diol HOPOH having a molecular weight from about 400 to about 4000, B is the residue of a dicarboxylic acid HOOC--B--COOH selected from the class consisting of aliphatic dicarboxylic acids having 6 to 14 carbon atoms, inclusive, isophthalic, and terephthalic acids, m has a mean value of less than 1 and greater than 0, D is the residue of a dicarboxylic acid HOOC--D--COOH such that the melt temperature of the hard segment is not greater than about 325° C., and x is a number having an average
Claim 2
Dependent Claim
130 words
A substantially linear segmented thermoplastic polyester-amide characterized by the combination of excellent hydrolytic stability, thermal stability, and low temperature flexibility, said polyester-amide having a recurring unit of the formula: wherein Ar is an arylene radical, P is the residue of a precursor polycarbonate diol HOPOH having a molecular weight from about 400 to about 4000, B is the residue of a dicarboxylic acid HOOC--B--COOH selected from the class consisting of aliphatic dicarboxylic acids having 6 to 14 carbon atoms, inclusive, isophthalic, and terephthalic acids, m has a mean value of less than 1 and greater than 0, D is the residue of a dicarboxylic acid HOOC--D--COOH such that the melt temperature of the hard segment is not greater than about 325° C., and x is a number having an average
Claim 3
Dependent Claim
13 words
A polyester-amide according to claim 1 wherein P is the residue of a
Claim 4
Dependent Claim
11 words
A polyester-amide according to claim 1 wherein the molecular weight of
Claim 5
Dependent Claim
24 words
A polyester-amide according to claim 1 wherein B is the residue of an aliphatic dicarboxylic acid having from 6 to 14 carbon atoms, inclusive.
Claim 6
Dependent Claim
12 words
A polyester-amide according to claim 4 wherein B is the residue of
Claim 7
Dependent Claim
12 words
A polyester-amide according to claim 4 wherein B is the residue of
Claim 8
Dependent Claim
29 words
A polyester-amide according to claim 1 wherein D is the residue of adipic acid and x has an average value in the range of about 0 to about 3.
Claim 9
Dependent Claim
28 words
A polyester-amide according to claim 1 wherein D is the residue of azelaic acid and x has an average value in the range of about 0 to about
Claim 10
Dependent Claim
9 words
A polyester-amide according to claim 1 wherein Ar represents
Claim 11
Dependent Claim
122 words
A substantially linear segmented thermoplastic polyester-amide characterized by the combination of excellent hydrolytic stability, thermal stability, and low temperature flexibility said polyester-amide having a recurring unit of the formula: ##STR8## wherein P is the residue of a precursor aliphatic hydroxyl terminated polycarbonate diol having a molecular weight from about 400 to about 4000, B is the residue of an aliphatic dicarboxylic acid having from 6 to 14 carbon atoms, inclusive, m has a mean value of less than 1 and greater than 0, D is the residue of a dicarboxylic acid HOOC--D--COOH such that the melt temperature of the hard segment is not greater than about 325° C., and x has an average value in the range of about 0 to 3.
Claim 12
Dependent Claim
122 words
A substantially linear segmented thermoplastic polyester-amide characterized by the combination of excellent hydrolytic stability, thermal stability, and low temperature flexibility said polyester-amide having a recurring unit of the formula: ##STR8## wherein P is the residue of a precursor aliphatic hydroxyl terminated polycarbonate diol having a molecular weight from about 400 to about 4000, B is the residue of an aliphatic dicarboxylic acid having from 6 to 14 carbon atoms, inclusive, m has a mean value of less than 1 and greater than 0, D is the residue of a dicarboxylic acid HOOC--D--COOH such that the melt temperature of the hard segment is not greater than about 325° C., and x has an average value in the range of about 0 to 3.
Claim 13
Dependent Claim
23 words
A polyester-amide according to claim 10 wherein said aliphatic hydroxyl terminated polycarbonate diol has a molecular weight from about 800 to about 2500.
Claim 14
Dependent Claim
34 words
A polyester-amide according to claim 11 wherein B is the residue of adipic acid, D is the residue of azelaic acid and x has an average value of from about 0.5 to about 1.5.
Claim 15
Dependent Claim
34 words
A polyester-amide according to claim 11 wherein B is the residue of azelaic acid, D is the residue of adipic acid and x has an average value of from about 0.5 to about 1.0.
Claim 16
Dependent Claim
48 words
A polyester-amide according to claim 11 wherein B is the residue of azelaic acid in about 50 percent of its occurrence and adipic acid in its remaining occurrence, D is the residue of azelaic acid and x has an average value of from about 0.5 to about 1.5.
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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) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |