US3839299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amorphous polyamide from bis(4-aminocyclohexyl)methane, bis(carboxyphenyl)methane and alkylene dicarboxylic acid
Assignee: Phillips Petroleum Co
•
Filing: 1972-11-27
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Granted: 1974-10-01
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Expires: 1992-11-27
Abstract
Abstract Substantially amorphous, optically clear polyamides are produced from a bis(4-aminocyclohexyl)methane or methyl derivative thereof and a bis(carboxyphenyl)methane or methyl derivative thereof. Copolyamides having desirable processing properties are produced by polymerizing the above monomers and at least one straight chain dicarboxylic acid as an additional monomer. The resulting polymers are useful as fibers as well as molding resins.
Inventors
- 👤 R Campbell
- 👤 P Stapp
- 👤 H Holtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:07
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/265
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
29 words
A FIBER-FORMING, SUBSTANTIALLY AMORPHOUS, OPTICALLY CLEAR SOLID POLYAMIDE CONSISTING ESSENTIALLY OF THE POLYMERIC REACTION PRODUCT OF A. AT LEAST ONE BIS(4-AMINOCYCLOHEXYL)METHANE OR A METHYL DERIVATIVE THEREOF OF THE FORMULA
Claim 2
Dependent Claim
29 words
A FIBER-FORMING, SUBSTANTIALLY AMORPHOUS, OPTICALLY CLEAR SOLID POLYAMIDE CONSISTING ESSENTIALLY OF THE POLYMERIC REACTION PRODUCT OF A. AT LEAST ONE BIS(4-AMINOCYCLOHEXYL)METHANE OR A METHYL DERIVATIVE THEREOF OF THE FORMULA
Claim 3
Dependent Claim
29 words
A copolyamide according to claim 1 wherein (a) is bis(4-aminocyclohexyl)methane, (b) is 2,2-bis(p-carboxyphenyl)propane, and (c) is suberic acid, and said product has a glass transition temperature of about 175*C.
Claim 4
Dependent Claim
32 words
The copolyamide of claim 1 wherein (a) is bis(4-aminocyclohexyl)methane, (b) is 2,2-bis(p-carboxyphenyl)propane and (c) is suberic acid, and (c) constitutes about 75 mole percent of the total amount of (b) and (c).
Claim 5
Dependent Claim
23 words
The composition of claim 1 in which at least 40 mole percent of reactant (a) is in the form of a trans,trans isomer.
References Cited (Backward Citations)
US2516585A
Cited
US2696482A
Cited
US2836579A
Cited
US3475387A
Cited
US3393210A
Cited
US3416302A
Cited
US3597400A
Cited
US3481133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |