Patent US4429099A successfully refreshed from Google Patents.
US4429099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenol terminated polymers and epoxies therefrom
Assignee: University of Akron
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Filing: 1982-11-22
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Granted: 1984-01-31
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Expires: 2002-11-22
Abstract
Abstract The invention sets forth novel telechelic (terminally functional) prepolymers which may be reacted to form curable epoxides. On account of the incorporation of saturated elastomer chains into the prepolymers improved epoxides arise having increased moisture resistance and less brittleness than conventional epoxides. These prepolymers may be straight chain or three-armed star, emanating from a common phenyl ring nucleus. Molecular weights of the prepolymers range from about 700 to 50,000 (linear) and from about 1000 to about 75,000 (three-arm star). The epoxides are useful as coatings, in adhesives, as additives, and the like.
Inventors
- 👤 Joseph P. Kennedy
- 👤 Suhas Guhaniyogi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:10
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/32; C08G59/3218; C08F; C08F8/00; C08F8/08; C08G59/02; C08G59/04; C08G59/06; C08G59/063; C08G59/22; C08G59/24; C08G59/245
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
46 words
A telechelic prepolymer, comprising: ##STR12## where n is 2 or 3 and Y is ##STR13## wherein R 1 and R 2 may be the same or different and are selected from the group consisting of --H, --OH, and --CH 3 and x is a positive integer.
Claim 2
Dependent Claim
46 words
A telechelic prepolymer, comprising: ##STR12## where n is 2 or 3 and Y is ##STR13## wherein R 1 and R 2 may be the same or different and are selected from the group consisting of --H, --OH, and --CH 3 and x is a positive integer.
Claim 3
Dependent Claim
31 words
A telechelic prepolymer according to claim 1, wherein x is from 2 to about 700 and the telechelic group is selected from the group consisting of resorcinol, phloroglucinol, 1,3-dimethyl-2-hydroxybenzene and phenol.
Claim 4
Dependent Claim
20 words
A telechelic prepolymer as in claim 2, wherein R 1 and R 2 are --H and x is about 30.
Claim 5
Dependent Claim
13 words
A telechelic prepolymer according to claim 3, wherein n is equal to 2.
Claim 6
Dependent Claim
13 words
A telechelic prepolymer according to claim 3, wherein n is equal to 3.
Claim 7
Dependent Claim
47 words
A telechelic epoxy prepolymer, comprising: ##STR14## where n is 2 or 3 and Z is: ##STR15## wherein R 1 and R 2 may be the same or different and are selected from the group consisting of --H, --OH, and --CH 3 and n is a positive integer.
Claim 8
Dependent Claim
47 words
A telechelic epoxy prepolymer, comprising: ##STR14## where n is 2 or 3 and Z is: ##STR15## wherein R 1 and R 2 may be the same or different and are selected from the group consisting of --H, --OH, and --CH 3 and n is a positive integer.
Claim 9
Dependent Claim
24 words
A telechelic epoxy prepolymer according to claim 6 wherein x is between about 2 and 700 and R 1 and R 2 are --H.
Claim 10
Dependent Claim
25 words
A telechelic epoxy prepolymer according to claim 7, wherein prepolymer is cured with amine selected from the group consisting of ethylene diamine and triethylene tetramine.
Claim 11
Dependent Claim
18 words
A telechelic epoxy prepolymer according to claim 8, wherein said amine cured prepolymer is flexible and moisture resistant.
Claim 12
Dependent Claim
17 words
A telechelic epoxy prepolymer according to claim 9, wherein amine cured prepolymer is used as a coating.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |