Patent US3927268A successfully refreshed from Google Patents.
US3852226A
Expired / Lapsed
US
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Melt-condensed polyamide interpolymers
Assignee: EIDP Inc
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Filing: 1973-04-19
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Granted: 1974-12-03
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Expires: 1993-04-19
Abstract
Abstract Melt-condensed polyamide interpolymers consisting essentially of at least four different recurring polyamide repeat units in which (a) about 35 to 55 percent of the amide equivalents are polymethylene- omega -aminoacid repeat units of six to 20 carbon atoms, (b) about 10 to 30 percent of the amide equivalents are diamine diacid repeat units in which the diamine is polymethylene diamine of six to 20 carbon atoms and the diacid is polymethylene diacid of six to 20 carbon atoms, (c) about 10 to 30 percent of the amide equivalents are diamine diacid repeat units in which the diamine is polymethylene diamine of six to 20 carbon atoms and the diacid is polymethylene diacid of six to 20 carbon atoms different from the diacid of (b) above, and (d) about 10 to 30 percent of the amide equivalents are diamine diacid repeat units in which the diamine is polymethylene diamine of six to 20 carbon atoms and the diacid is polymethylene diacid of six to 20 carbon atoms different from the diacids of (b) and (c) above, have unusual solubility and/or low melting properties. These interpolymers are soluble to the extent of at least about 20 percent in common solvents at room temperature and/or melt completely at about 125* C.
Inventors
- 👤 J Sprauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:01
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/36
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
191 words
A MELT-CONDENSED POLYAMIDE INTERPOLYMER CONSISTING ESSENTIALLY OF AT LEAST FOUR DIFFERENT RECURRING POLYAMIDE REPEAT UNITS IN WHICH A 35. TO 55 PERCENT OF THE AMIDE EQUIVALENTS ARE POLYMETHYLLENE-W-AMINOACID REPEAT UNITS OF SIX TO 20 CARBON ATOMS, B. 10 TO 30 PERCENT OF THE AMIDE EQUIVALENTS ARE DIAMINE DIACID REPEAT UNITS IN WHICH THE DIAMINE IS POLYMETHYLENE DIAMINE OF SIX TO 20 CARBON ATOMS AND THE DIACID IS POLYMETHYLENE DIACID OF SIX TO 20 CARBON ATOMS, E. 10 TO 30 PERCENT OF THE AMIDE EQUIVALENT ARE DIAMINE DIACID REPEAT UNITS IN WHICH THE DIAMINE IS POLYMETHYLENE DIAMINE OF SIX TO 20 CARBON ATOMS AND THE DIACID IS POLYMETHYLENE DIACID OF SIX TO 20 CARBON ATOMS DIFFERENT FROM THE DIACID OF (B) ABOVE, AND Do 10 TO 30 PERCENT OF THE AMIDE EQUIVALENTS ARE DIAMINE DIACID REPEAT UNITS IN WHICH THE DIAMINE IS POLYMETHYLENE DIAMINE OF SIX TO 20 CARBON ATOMS AND THE DIACID IS POLYMETHYLENE DIACID OF SIX TO 20 CARBON ATOMS DIFFERENT FROM THE DIACIDS OF (B) AND (C) ABOVE, SAID POLYAMIDE INTERPOLYMER HAVING A CRYSTALLINE HEAT OF FUSION OF 3 TO 15 CALORIES PER GRAM AND MELTING COMPLETELY AT 125*C.
Claim 2
Dependent Claim
191 words
A MELT-CONDENSED POLYAMIDE INTERPOLYMER CONSISTING ESSENTIALLY OF AT LEAST FOUR DIFFERENT RECURRING POLYAMIDE REPEAT UNITS IN WHICH A 35. TO 55 PERCENT OF THE AMIDE EQUIVALENTS ARE POLYMETHYLLENE-W-AMINOACID REPEAT UNITS OF SIX TO 20 CARBON ATOMS, B. 10 TO 30 PERCENT OF THE AMIDE EQUIVALENTS ARE DIAMINE DIACID REPEAT UNITS IN WHICH THE DIAMINE IS POLYMETHYLENE DIAMINE OF SIX TO 20 CARBON ATOMS AND THE DIACID IS POLYMETHYLENE DIACID OF SIX TO 20 CARBON ATOMS, E. 10 TO 30 PERCENT OF THE AMIDE EQUIVALENT ARE DIAMINE DIACID REPEAT UNITS IN WHICH THE DIAMINE IS POLYMETHYLENE DIAMINE OF SIX TO 20 CARBON ATOMS AND THE DIACID IS POLYMETHYLENE DIACID OF SIX TO 20 CARBON ATOMS DIFFERENT FROM THE DIACID OF (B) ABOVE, AND Do 10 TO 30 PERCENT OF THE AMIDE EQUIVALENTS ARE DIAMINE DIACID REPEAT UNITS IN WHICH THE DIAMINE IS POLYMETHYLENE DIAMINE OF SIX TO 20 CARBON ATOMS AND THE DIACID IS POLYMETHYLENE DIACID OF SIX TO 20 CARBON ATOMS DIFFERENT FROM THE DIACIDS OF (B) AND (C) ABOVE, SAID POLYAMIDE INTERPOLYMER HAVING A CRYSTALLINE HEAT OF FUSION OF 3 TO 15 CALORIES PER GRAM AND MELTING COMPLETELY AT 125*C.
Claim 3
Dependent Claim
19 words
The melt-condensed polyamide interpolymer of claim 1 which has a melt index of 0.1 to 200 at 190* C.
Claim 4
Dependent Claim
101 words
The melt-condensed polyamide interpolymer of claim 2 in which a. 40 to 55 percent of the amide equivalents are omega-aminocaproic acid repeat units, b. 10 to 25 percent of the amide equivalents are hexamethylene adipamide repeat units, c. 10 to 25 percent of the amide equivalents are hexamethylene diamine diacid repeat units in which the diacid is polymethylene diacid of nine to 12 carbon atoms, and d. 10 to 25 percent of the amide equivalents are hexamethylene diamine diacid repeat units in which the diacid is polymethylene diacid of nine to 12 carbon atoms different from the diacid of (c) above.
Claim 5
Dependent Claim
16 words
The melt-condensed polyamide interpolymer of claim 3 which has a melt index of 1 to 20.
Claim 6
Dependent Claim
175 words
The melt-condensed polyamide interpolymer of claim 1 in which a. 35 to 55 percent of the amide equivalents are omega-aminocaproic acid repeat units, b. 10 to 30 percent of the amide equivalents are diamine diacid repeat units in which the diamine is polymethylene diamine of six to 20 carbon atoms and the diacid is selected from the group consisting of adipic, azelaic, sebacic and dodecanedioic acids, c. 10 to 30 percent of the amide equivalents are diamine diacid repeat units in which the diamine is polymethylene diamine of six to 20 carbon atoms and the diacid is a member of the group consisting of adipic, azelaic, sebacic and dodecanedioic acids which is different from the diacid of (b) above, and d. 10 to 30 percent of the amide equivalents are diamine diacid repeat units in which the diamine is polymethylene diamine of six to 20 carbon atoms and the diacid is a member of the group consisting of adipic, azelaic, sebacic and dodecanedioic acids which is different from the diacids of (b) and (c) above.
Claim 7
Dependent Claim
15 words
The melt-condensed polyamide interpolymer of claim 5 in which the polymethylene diamine is hexamethylene diamine.
Claim 8
Dependent Claim
30 words
The melt-condensed polyamide interpolymer of claim 6 in which up to 30 mole percent of the hexamethylene diamine is replaced by an aliphatic diamine of two to 20 carbon atoms.
Claim 9
Dependent Claim
15 words
The melt-condensed polyamide interpolymer of claim 7 in which the aliphatic diamine is ethylene diamine.
Claim 10
Dependent Claim
27 words
The melt-condensed polyamide interpolymer of claim 5 in which 10 to 15 percent of the amide equivalents are diamine diacid in which the diacid is adipic acid.
References Cited (Backward Citations)
US3637551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |