US4954574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imide polymers
Assignee: Rohm and Haas Co
•
Filing: 1989-12-19
•
Granted: 1990-09-04
•
Expires: 2009-12-19
Abstract
Abstract Glutarimide polymers having an acid and anhydride content lower than the acid and/or anhydride content normally present in the glutarimide polymers. Blends of the reduced acid and anhydride glutarimide polymers with thermoplastic materials are disclosed. A process for altering the properties of imide polymers by reducing or substantially removing acid and anhydride levels normally present in the imide polymer is also disclosed.
Inventors
- 👤 Michael P. Hallden-Abberton
- 👤 Newman M. Bortnick
- 👤 Leslie A. Cohen
- 👤 William T. Freed
- 👤 Harry C. Fromuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:51
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F8/32; C08L; C08L101/00; C08L101/02; C08L33/00; C08L33/24
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
175 words
A polymer containing glutarimide units wherein the degree of imidization, by weight, on said polymer is from about 1% to about 95%, and the degree of imidization and the acid and anhydride functionality on said polymer, expressed in milliequivalents per gram of total imidizable and imidized polymer units are as set forth below: ______________________________________
when the degree of imidization
the milliequivalents of acid
on said polymer is and anhydride per gram are
______________________________________
from about 1% to about 10%
0 to about 0.20
above about 10% to about 20%
0 to about 0.28
above about 20% to about 30%
0 to about 0.32
above about 30% to about 40%
0 to about 0.31
above about 40% to about 50%
0 to about 0.28
above about 50% to about 60%
0 to about 0.28
above about 60% to about 70%
0 to about 0.27
above about 70% to about 80%
0 to about 0.28
above about 80% to about 90%
0 to about 0.33
and above about 90% to about 95%
0 to about 0.40.
______________________________________
Claim 2
Dependent Claim
175 words
A polymer containing glutarimide units wherein the degree of imidization, by weight, on said polymer is from about 1% to about 95%, and the degree of imidization and the acid and anhydride functionality on said polymer, expressed in milliequivalents per gram of total imidizable and imidized polymer units are as set forth below: ______________________________________
when the degree of imidization
the milliequivalents of acid
on said polymer is and anhydride per gram are
______________________________________
from about 1% to about 10%
0 to about 0.20
above about 10% to about 20%
0 to about 0.28
above about 20% to about 30%
0 to about 0.32
above about 30% to about 40%
0 to about 0.31
above about 40% to about 50%
0 to about 0.28
above about 50% to about 60%
0 to about 0.28
above about 60% to about 70%
0 to about 0.27
above about 70% to about 80%
0 to about 0.28
above about 80% to about 90%
0 to about 0.33
and above about 90% to about 95%
0 to about 0.40.
______________________________________
Claim 3
Dependent Claim
15 words
A polymer according to claim 1 wherein said polymer is substantially free of amide functionality.
Claim 4
Dependent Claim
28 words
A polymer according to claim 1 wherein said polymer has a 1% weight loss at a temperature above 285° C. in air and above 300° C. in nitrogen.
Claim 5
Dependent Claim
35 words
A polymer according to claim 1 wherein the degree of imidization on said polymer is from about 40% to about 88% and the milliequivalents of acid and anhydride present is from 0 to about 0.25.
Claim 6
Dependent Claim
34 words
A polymer according to claim 1 wherein the degree of imidization on said polymer is from about 50% to about 85% and the milliequivalents of acid and anhydride present is less than about 0.25.
Claim 7
Dependent Claim
23 words
A polymer according to claim 1 wherein said polymer contains up to about 50%, by weight, of acrylic or methacrylic acid ester units.
Claim 8
Dependent Claim
24 words
A polymer according to claim 6 wherein said polymer contains from about 10% to about 50%, by weight of acrylic or methacrylic ester units.
Claim 9
Dependent Claim
18 words
A polymer according to claim 7 wherein the eater moiety contains from 1 to about 20 carbon atoms.
Claim 10
Dependent Claim
12 words
A polymer according to claim 7 wherein the ester moiety is methyl.
Claim 11
Dependent Claim
27 words
A polymer according to claim 1 wherein said polymer contains from about 50% to about 99%, by weight, of ester units derived from acrylic or methacrylic acid.
Claim 12
Dependent Claim
31 words
A polymer according to claim 1 wherein said glutarimide units are derived from a primary amine having substituted or unsubstituted alkyl or aryl groups of up to about 20 carbon atoms.
Claim 13
Dependent Claim
14 words
A polymer according to claim 1 wherein said glutarimide units are derived from methylamine.
Claim 14
Dependent Claim
14 words
A polymer according to claim 1 wherein said glutarimide units are derived from ammonia.
Claim 15
Dependent Claim
14 words
A polymer according to claim 1 wherein said glutarimide units are derived from aniline.
Claim 16
Dependent Claim
14 words
A polymer according to claim 1 wherein said glutarimide units are derived from cyclohexylamine.
Claim 17
Dependent Claim
24 words
A polymer according to claim 1 wherein said polymer is a multi-stage polymer in which the outermost stage of said polymer contains imide units.
Claim 18
Dependent Claim
16 words
The polymer of claim 1 wherein the immidizable polymer units are acrylic or methacrylic ester units.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-09-03 | 1994-03-05 | 1994-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-03 | 1998-03-05 | 1998-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-03 | 2002-03-05 | 2002-09-04 | $7700.00 | Window Closed / Lapsed |