Patent US4565849A successfully refreshed from Google Patents.
US4565849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide elastomer from carboxy terminated polyamide and polyoxy-2-methyl-1,3-propylene diol
Assignee: Daicel Corp
•
Filing: 1984-07-11
•
Granted: 1986-01-21
•
Expires: 2004-07-11
Abstract
Abstract A process for preparing polyamide elastomers is provided which process comprises reacting a polyamide-forming component having carboxyl groups at both ends thereof with polyoxyalkylene glycol(s) at least 10 wt. % of which comprises a polyoxy-2-methyl-1,3-propylenediol having a number-average molecular weight of about 400 to 10,000. The polyamide-forming component forms a polyamide block having a recurring unit of the formula: ##STR1## in which n represents a positive integer of 5 to 11, and/or ##STR2## in which l represents a positive integer of 6 to 20 and m represents a positive integer of 4 to 20. The obtained polyamide elastomers have excellent low-temperature properties and elastic recovery.
Inventors
- 👤 Takeshi Horikawa
- 👤 Kenichi Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:02
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
138 words
A process for preparing a polyamide elastomer, which comprises: reacting (I) polyamide-forming component having carboxyl groups at both ends of the molecule and capable of forming polyamide blocks, with (II) polyoxyalkylene glycol component whereby to form the polyamide elastomer, the recurring units of said polyamide block being selected from the group consisting of units of the formula A ##STR9## wherein n is an integer of 5 to 11, units of the formula B ##STR10## wherein l is an integer of 6 to 20 and m is an integer of 4 to 20, and units of both of formula A and formula B, said polyamide blocks having a number average molecular weight of from 400 to 10,000, said polyoxyalkylene glycol component containing at least 10 wt.% of polyoxy-2-methyl-1,3-propylene glycol having a number average molecular weight of 400 to 10,000.
Claim 2
Dependent Claim
138 words
A process for preparing a polyamide elastomer, which comprises: reacting (I) polyamide-forming component having carboxyl groups at both ends of the molecule and capable of forming polyamide blocks, with (II) polyoxyalkylene glycol component whereby to form the polyamide elastomer, the recurring units of said polyamide block being selected from the group consisting of units of the formula A ##STR9## wherein n is an integer of 5 to 11, units of the formula B ##STR10## wherein l is an integer of 6 to 20 and m is an integer of 4 to 20, and units of both of formula A and formula B, said polyamide blocks having a number average molecular weight of from 400 to 10,000, said polyoxyalkylene glycol component containing at least 10 wt.% of polyoxy-2-methyl-1,3-propylene glycol having a number average molecular weight of 400 to 10,000.
Claim 3
Dependent Claim
103 words
A process for preparing a polyamide elastomer which comprises the steps of: reacting polyamide-forming components to form a polyamide having carboxyl groups at both ends of the molecule, said polyamide having a number average molecular weight of 400 to 10,000; and reacting said polyamide, at a temperature of 220°-270° C., under a pressure of less than 1 mm Hg and in the presence of a polyester-forming catalyst and an antioxidant to prevent thermal deterioration of the polyamide when heated, with a polyoxyalkylene glycol component, at least 10 wt.% of which comprises poly-2-methyl-1,3 propylenediol having a number average molecular weight of 400 to 10,000.
Claim 4
Dependent Claim
103 words
A process for preparing a polyamide elastomer which comprises the steps of: reacting polyamide-forming components to form a polyamide having carboxyl groups at both ends of the molecule, said polyamide having a number average molecular weight of 400 to 10,000; and reacting said polyamide, at a temperature of 220°-270° C., under a pressure of less than 1 mm Hg and in the presence of a polyester-forming catalyst and an antioxidant to prevent thermal deterioration of the polyamide when heated, with a polyoxyalkylene glycol component, at least 10 wt.% of which comprises poly-2-methyl-1,3 propylenediol having a number average molecular weight of 400 to 10,000.
Claim 5
Dependent Claim
28 words
A process as set forth in claim 2 wherein said polyamide has recurring units of the formula: ##STR11## in which n is an integer of 5 to 11.
Claim 6
Dependent Claim
37 words
A process as set forth in claim 2 wherein said polyamide has recurring units of the formula: ##STR12## in which l is an integer of 6 to 20 and m is an integer of 4 to 20.
Claim 7
Dependent Claim
51 words
A process as set forth in claim 2 wherein said polyamide is comprised of recurring units of the formulas: ##STR13## in which n is an integer of 5 to 11, and ##STR14## in which l is an integer of 6 to 20 and m is an integer of 4 to 20.
Claim 8
Dependent Claim
19 words
A process as claimed in claim 1 in which said polyoxyalkylene glycol component consists essentially of said polyoxy-2-methyl-1,3-propylene glycol.
Claim 9
Dependent Claim
25 words
A process as claimed in claim 1 in which said polyoxyalkylene glycol component consists essentially of a mixture of said polyoxy-2-methyl-1,3-propylene glycol and polyoxytetramethylene glycol.
Claim 10
Dependent Claim
15 words
A polyamide elastomer which has been obtained by a process as defined in claim 1.
Claim 11
Dependent Claim
15 words
A polyamide elastomer which has been obtained by a process as defined in claim 2.
Claim 12
Dependent Claim
15 words
A polyamide elastomer which has been obtained by a process as defined in claim 3.
Claim 13
Dependent Claim
15 words
A polyamide elastomer which has been obtained by a process as defined in claim 4.
Claim 14
Dependent Claim
15 words
A polyamide elastomer which has been obtained by a process as defined in claim 5.
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) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |