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US3880812A
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Poly(alkylenetrimellitate imides) and method of preparation
Assignee: Standard Oil Co
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Filing: 1974-01-11
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Granted: 1975-04-29
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Expires: 1994-01-11
Abstract
Abstract Poly(alkylenetrimellitate imides) having an inherent viscosity of at least 0.3 dl/g suitable for forming films, coatings and molded objects.
Inventors
- 👤 Herbert S Golinkin
- 👤 Robert G Keske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:17
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
17 words
POLY(ALKYLENETRIMELLITATE IMIDE) HAVING AN I.V. OF AT LEAST 0.3 DI/G AT 25*C AND 0.5%W/V 60/40 W/W PHENOL/-1,2,2TETRACHLOROETHANE.
Claim 2
Dependent Claim
17 words
POLY(ALKYLENETRIMELLITATE IMIDE) HAVING AN I.V. OF AT LEAST 0.3 DI/G AT 25*C AND 0.5%W/V 60/40 W/W PHENOL/-1,2,2TETRACHLOROETHANE.
Claim 3
Dependent Claim
12 words
The poly(alkylenetrimellitate imide) of claim 1, wherein said alkylene group comprises ethylene.
Claim 4
Dependent Claim
12 words
The poly(alkylenetrimellitate imide) of claim 2, wherein the polymer is a homopolymer.
Claim 5
Dependent Claim
17 words
The poly(alkylenetrimellitate imide) of claim 2, wherein the polymer is in the form of a self-supporting film.
Claim 6
Dependent Claim
25 words
The poly(alkylenetrimellitate imide) of claim 3, wherein the polymer is in the form of a self-supporting film having an I.V. of at least 0.7 dl/g.
Claim 7
Dependent Claim
19 words
The poly(alkylenetrimellitate imide) of claim 2, wherein the polymer is in the form of a coating on a substrate.
Claim 8
Dependent Claim
17 words
The poly(alkylenetrimellitate imide) of claim 2, wherein the polymer is in the form of a molded object.
Claim 9
Dependent Claim
36 words
The method of producing the polymer of claim 1 having an I.V. of at least 0.3 dl/g which comprises melt polymerizing an N-hydroxyalkyltrimellitic acid imide under melt polymerization conditions in the presence of a tin catalyst.
Claim 10
Dependent Claim
51 words
The method of producing the polymer of claim 1 having an I.V. of at least 0.3 dl/g which comprises the steps of (1) melt polymerizing an N-hydroxyalkyltrimellitic acid imide under melt polymerization conditions, and (2) further polymerizing the polymer produced in step 1 while maintaining the polymer in a solid state.
Claim 11
Dependent Claim
38 words
The method of producing the polymer of claim 1 having an I.V. of at leAst 0.3 dl per gram which comprises melt polymerizing and N-hydroxyalkyltrimetllitic acid imide under melt polymerization conditions in the presence of an antimony catalyst.
References Cited (Backward Citations)
US3060191A
Cited
US3733302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |