US4066622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide acids and polyesterimides from 1,3-adamantylene-bis-trimellitate dianhydrides
Assignee: BP Corp North America Inc
•
Filing: 1976-02-12
•
Granted: 1978-01-03
•
Expires: 1996-02-12
Abstract
Abstract Novel dianhydrides derived from trimellitic anhydride and adamantane diacetates are polymerized with a diamine to produce the corresponding polyamide, which is subsequently converted to the polyesterimide by heat treatment at temperatures above 500° F.
Inventors
- 👤 Allen Feinstein
- 👤 Ellis K. Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:35
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/87; C07D307/89; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
80 words
As a composition of matter, a polyamide acid formed by reacting about equimolar amounts of a dianhydride with a diamine at a temperature below 500° F., said dianhydride having the general formula ##STR4## wherein R 1 and R 2 are individually selected from the group consisting of hydrogen, an alkyl radical, and an aryl radical, and said diamine having the general formula H.sub.2 N --R.sub.3 --NH.sub.2 wherein R 3 is selected from the group consisting of alkylene and arylene groups.
Claim 2
Dependent Claim
80 words
As a composition of matter, a polyamide acid formed by reacting about equimolar amounts of a dianhydride with a diamine at a temperature below 500° F., said dianhydride having the general formula ##STR4## wherein R 1 and R 2 are individually selected from the group consisting of hydrogen, an alkyl radical, and an aryl radical, and said diamine having the general formula H.sub.2 N --R.sub.3 --NH.sub.2 wherein R 3 is selected from the group consisting of alkylene and arylene groups.
Claim 3
Dependent Claim
11 words
The polyamide acid of claim 1 wherein R 1 is hydrogen.
Claim 4
Dependent Claim
11 words
The polyamide acid of claim 2 wherein R 2 is hydrogen.
Claim 5
Dependent Claim
26 words
As a composition of matter, the polyamide acid produced by reacting about equimolar amount of 1,3-adamantylene-bistrimellitate dianhydride with 4,4'-diaminodiphenyl ether at a temperature below 500° F.
Claim 6
Dependent Claim
26 words
As a composition of matter, the polyamide acid produced by reacting about equimolar amount of 1,3-adamantylene-bistrimellitate dianhydride with 4,4'-diaminodiphenyl ether at a temperature below 500° F.
Claim 7
Dependent Claim
87 words
As a composition of matter, a polyestermide formed by reacting about equimolar amounts of a dianhydride with a diamine and heating the reaction product to a temperature of from 500° F. to 700° F., said dianhydride having the general formula ##STR5## wherein R 1 and R 2 are individually selected from the group consisting of hydrogen, an alkyl radical, and an aryl radical, and said diamine having the general formula H.sub.2 N--R.sub.3 --NH.sub.2 wherein R 3 is selected from the group consisting of alkalene and arylene groups.
Claim 8
Dependent Claim
87 words
As a composition of matter, a polyestermide formed by reacting about equimolar amounts of a dianhydride with a diamine and heating the reaction product to a temperature of from 500° F. to 700° F., said dianhydride having the general formula ##STR5## wherein R 1 and R 2 are individually selected from the group consisting of hydrogen, an alkyl radical, and an aryl radical, and said diamine having the general formula H.sub.2 N--R.sub.3 --NH.sub.2 wherein R 3 is selected from the group consisting of alkalene and arylene groups.
Claim 9
Dependent Claim
10 words
The polyesterimide of claim 5 wherein R 1 is hydrogen.
Claim 10
Dependent Claim
10 words
The polyesterimide of claim 6 wherein R 2 is hydrogen.
Claim 11
Dependent Claim
35 words
As a composition of matter, a polyesterimide formed by reacting about equimolar amounts of 1,3-adamantylene-bistrimellitate dianhydride with 4,4'-diaminodiphenyl ether and subsequently heating the reaction product to a temperature of from 500° F. to 700° F.
Claim 12
Dependent Claim
35 words
As a composition of matter, a polyesterimide formed by reacting about equimolar amounts of 1,3-adamantylene-bistrimellitate dianhydride with 4,4'-diaminodiphenyl ether and subsequently heating the reaction product to a temperature of from 500° F. to 700° F.
References Cited (Backward Citations)
US3814735A
Cited
US3847872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |