US5134218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxy-functional poly(amide ethers) as thermoplastic barrier resins
Assignee: Dow Chemical Co
•
Filing: 1991-06-06
•
Granted: 1992-07-28
•
Expires: 2011-06-06
Abstract
Abstract Poly(hydroxy amide ethers) which exhibit high barrier properties are prepared by contacting one or more amide-containing bisphenols and an epihalohydrin. These polymers are suitable for use in the manufacture of articles such as rigid containers and flexible films exhibiting high barrier to oxygen transmission in moist environments.
Inventors
- 👤 David J. Brennan
- 👤 Jerry E. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:50
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/40; C08G59/00; C08G59/02; C08G59/04; C08G59/06; C08G59/063; C08G59/18; C08G59/20; C08G59/22; C08G59/28
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
70 words
A thermoplastic barrier polymer having aromatic ether moieties and amide moieties in its backbone chain and pendent hydroxyl moieties and having repeating units represented by the formula: ##STR8## wherein each Ar is independently a divalent aromatic moiety, each R 1 is independently a predominantly hydrocarbylene moiety, divalent aromatic moiety, or divalent heteroaromatic moiety, each R 2 is independently hydrogen or a monovalent aliphatic moiety and n is 10 to 1000.
Claim 2
Dependent Claim
70 words
A thermoplastic barrier polymer having aromatic ether moieties and amide moieties in its backbone chain and pendent hydroxyl moieties and having repeating units represented by the formula: ##STR8## wherein each Ar is independently a divalent aromatic moiety, each R 1 is independently a predominantly hydrocarbylene moiety, divalent aromatic moiety, or divalent heteroaromatic moiety, each R 2 is independently hydrogen or a monovalent aliphatic moiety and n is 10 to 1000.
Claim 3
Dependent Claim
108 words
The polymer of claim 1 wherein Ar is arylene or substituted arylene wherein the substituent is alkyl, aryl, halo, nitro, or cyano; R 1 is predominantly hydrocarbylene chosen from (1) alkylene which has from 1 to about 10 carbons which may contain a heteroatomic moiety chosen from oxygen, sulfur, sulfonyl, or sulfoxyl or (2) arylene which has from 5 to 25 carbons, may contain a heteroatomic moiety and may be substituted with alkyl, alkoxy, halo, nitro, or cycloalkyl groups; and R 2 is hydrogen or a hydrocarbyl or substituted hydrocarbyl wherein the substituent(s) is a monovalent moiety which is inert in the reactions used to prepare the polymer.
Claim 4
Dependent Claim
16 words
The polymer of claim 1 prepared by contacting one or more amide-containing bisphenols and an epihalohydrin.
Claim 5
Dependent Claim
16 words
The polymer of claim 1 prepared by contacting one or more amide-containing bisphenols and an epihalohydrin.
Claim 6
Dependent Claim
13 words
The polymer of claim 2 having repeating units represented by the formula: ##STR9##
Claim 7
Dependent Claim
13 words
The polymer of claim 2 having repeating units represented by the formula: ##STR10##
Claim 8
Dependent Claim
13 words
The polymer of claim 2 having repeating units represented by the formula: ##STR11##
Claim 9
Dependent Claim
20 words
The polymer of claim 3 wherein the amide-containing bisphenol is selected from the group consisting of N,N'-bis(3-hydroxyphenyl)adipamide, N,N'-bis(3-hydroxyphenyl)glutaramide and α,α'-bis(4-hydroxybenzamido)-1,3-xylene.
Claim 10
Dependent Claim
19 words
The polymer of claim 3 wherein the epihalohydrin is selected from the group consisting of epichlorohydrin, epibromohydrin, and epiiodohydrin.
Claim 11
Dependent Claim
12 words
The polymer of claim 1 in the form of a barrier film.
Claim 12
Dependent Claim
12 words
The polymer of claim 1 in the form of a barrier container.
Claim 13
Dependent Claim
12 words
The polymer of claim 1 in the form of a barrier coating.
References Cited (Backward Citations)
US2602075A
Cited
US3305528A
Cited
US3514418A
Cited
US3477990A
Cited
US4367328A
Cited
US4395533A
Cited
US4398002A
Cited
US4410681A
Cited
US4837293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-28 | 1996-01-27 | 1996-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-28 | 2000-01-27 | 2000-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-28 | 2004-01-27 | 2004-07-28 | $7700.00 | Window Closed / Lapsed |