US4548981A
Expired / Lapsed
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Compositions and articles containing polymeric vinyl aromatic aminimides
Assignee: Polaroid Corp
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Filing: 1983-07-01
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Granted: 1985-10-22
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Expires: 2003-07-01
Abstract
Abstract Compositions and articles containing polymeric vinyl aromatic aminimides are disclosed. The polymeric vinyl aromatic aminimides exhibit unusual rheological properties in an aqueous medium. The polymers provide thermoreversible gelling properties and exhibit negative thixotropy.
Inventors
- 👤 Henry S. Kolesinski
- 👤 Lloyd D. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:22
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/261; C; C08; C08F; C08F12/00; C08F12/02; C08F12/04; C08F12/14; C08F12/26; C08L; C08L25/00; C08L25/18; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31721
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
91 words
An aqueous polymeric composition exhibiting thermoreversible gel forming properties comprising an aqueous medium having therein, at a weight concentration of from 4% to 10%, a polymeric vinyl aromatic aminimide comprising repeating units of the formula ##STR4## wherein R is hydrogen, methyl or halogen; n is zero or one; and each of R 1 , R 2 and R 3 is alkyl, aryl, aralkyl or alkaryl, or two of R 1 , R 2 and R 3 , together with the nitrogen atom to which they are bonded, complete a heterocyclic ring.
Claim 2
Dependent Claim
91 words
An aqueous polymeric composition exhibiting thermoreversible gel forming properties comprising an aqueous medium having therein, at a weight concentration of from 4% to 10%, a polymeric vinyl aromatic aminimide comprising repeating units of the formula ##STR4## wherein R is hydrogen, methyl or halogen; n is zero or one; and each of R 1 , R 2 and R 3 is alkyl, aryl, aralkyl or alkaryl, or two of R 1 , R 2 and R 3 , together with the nitrogen atom to which they are bonded, complete a heterocyclic ring.
Claim 3
Dependent Claim
27 words
The aqueous polymeric composition of claim 1 wherein R is hydrogen, n is zero and each of R 1 , R 2 and R 3 is methyl.
Claim 4
Dependent Claim
95 words
An aqueous polymeric composition exhibiting negative thixotropic properties comprising an aqueous medium having therein, at a concentration in the range of about 1% to about 3% by weight, a polymeric vinyl aromatic aminimide comprising repeating units of the formula ##STR5## wherein R is hydrogen, methyl or halogen; n is zero or one; and each of R 1 , R 2 and R 3 is alkyl, aryl, aralkyl or alkaryl, or two of R 1 , R 2 and R 3 , together with the nitrogen atom to which they are bonded, complete a heterocyclic ring.
Claim 5
Dependent Claim
95 words
An aqueous polymeric composition exhibiting negative thixotropic properties comprising an aqueous medium having therein, at a concentration in the range of about 1% to about 3% by weight, a polymeric vinyl aromatic aminimide comprising repeating units of the formula ##STR5## wherein R is hydrogen, methyl or halogen; n is zero or one; and each of R 1 , R 2 and R 3 is alkyl, aryl, aralkyl or alkaryl, or two of R 1 , R 2 and R 3 , together with the nitrogen atom to which they are bonded, complete a heterocyclic ring.
Claim 6
Dependent Claim
100 words
An article comprising a support sheet carrying a layer of thermoreversible gel, the gel comprising a medium of water and having therein, at a concentration in the range of from 4% to 10%, a polymeric vinyl aromatic aminimide comprising repeating units of the formula ##STR6## wherein R is hydrogen, methyl or halogen; n is zero or one; and each of R 1 , R 2 and R 3 is alkyl, aryl, aralkyl or alkaryl, or two of R 1 , R 2 and R 3 , together with the nitrogen atom to which they are bonded, complete a heterocyclic ring.
Claim 7
Dependent Claim
100 words
An article comprising a support sheet carrying a layer of thermoreversible gel, the gel comprising a medium of water and having therein, at a concentration in the range of from 4% to 10%, a polymeric vinyl aromatic aminimide comprising repeating units of the formula ##STR6## wherein R is hydrogen, methyl or halogen; n is zero or one; and each of R 1 , R 2 and R 3 is alkyl, aryl, aralkyl or alkaryl, or two of R 1 , R 2 and R 3 , together with the nitrogen atom to which they are bonded, complete a heterocyclic ring.
Claim 8
Dependent Claim
25 words
The article of claim 4 wherein R is hydrogen, n is zero and each of R 1 , R 2 and R 3 is methyl.
Claim 9
Dependent Claim
15 words
The article of claim 4 wherein said support sheet is a transparent polymeric support sheet.
Claim 10
Dependent Claim
16 words
The article of claim 5 wherein said concentration is in the range of 5% to 10%.
Claim 11
Dependent Claim
60 words
An article comprising a polymeric support sheet carrying a polymeric gel layer, the gel layer comprising a medium of water and having therein, at a concentration in the range of from 4% to about 10%, a polymeric vinyl aromatic aminimide comprising repeating units of the formula ##STR7## wherein each of R 1 , R 2 and R 3 is alkyl.
Claim 12
Dependent Claim
60 words
An article comprising a polymeric support sheet carrying a polymeric gel layer, the gel layer comprising a medium of water and having therein, at a concentration in the range of from 4% to about 10%, a polymeric vinyl aromatic aminimide comprising repeating units of the formula ##STR7## wherein each of R 1 , R 2 and R 3 is alkyl.
Claim 13
Dependent Claim
18 words
The article of claim 8 wherein each of R 1 , R 2 and R 3 is methyl.
Claim 14
Dependent Claim
16 words
The article of claim 9 wherein said concentration is in the range of 5% to 10%.
Claim 15
Dependent Claim
24 words
The aqueous polymeric composition of claim 3 wherein the polymeric vinyl aromatic aminimide is present in the composition at a concentration of about 2.5%.
References Cited (Backward Citations)
US3641145A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-21 | 1989-04-22 | 1989-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-21 | 1993-04-22 | 1993-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-21 | 1997-04-22 | 1997-10-22 | $7700.00 | Window Closed / Lapsed |