US4729925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane elastomers comprising a charge-control agent and shaped elements therefrom
Assignee: Eastman Kodak Co
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Filing: 1986-12-22
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Granted: 1988-03-08
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Expires: 2006-12-22
Abstract
Abstract Herein are disclosed polyurethane elastomers comprising a charge-control agent of the formula: ##STR1## The elastomers are useful in making shaped articles.
Inventors
- 👤 Tsang J. Chen
- 👤 Donald A. Upson
- 👤 Paul D. Yacobucci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:22
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/08; C08G18/0804; C08G18/0819; C08G18/42; C08G18/46; C08G18/4676; C08G18/70; C08G18/72; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8041; G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/1665; G03G15/167; G03G15/1685; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/102; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31605
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
131 words
A polyurethane elastomer formed from a composition comprising in approximately stoichiometric amounts: (a) a polyisocyanate prepolymer which is the reaction product of: (i) an aliphatic polyisocyanate, and (ii) an amine-based polyol; and (b) a hardening mixture comprising: (i) a polyol selected from the group consisting of amine-based polyols, polyether polyols and mixtures thereof, and (ii) from 1 to 8 weight percent based on the total weight of (b) of a charge-control agent having the formula: ##STR11## R 1 represents ##STR12## R 6 represents sulfonate, oxyphenylene sulfonate, oxycyclohexylene sulfonate or p-toluenesulfonamidosulfonyl; m and n are integers which together are of sufficient value to achieve an R 1 molecular weight of 300 to 30,000; M represents hydrogen, an alkali metal, ammonium or P + (C 6 H 5 ) 3 CH 3 .
Claim 2
Dependent Claim
131 words
A polyurethane elastomer formed from a composition comprising in approximately stoichiometric amounts: (a) a polyisocyanate prepolymer which is the reaction product of: (i) an aliphatic polyisocyanate, and (ii) an amine-based polyol; and (b) a hardening mixture comprising: (i) a polyol selected from the group consisting of amine-based polyols, polyether polyols and mixtures thereof, and (ii) from 1 to 8 weight percent based on the total weight of (b) of a charge-control agent having the formula: ##STR11## R 1 represents ##STR12## R 6 represents sulfonate, oxyphenylene sulfonate, oxycyclohexylene sulfonate or p-toluenesulfonamidosulfonyl; m and n are integers which together are of sufficient value to achieve an R 1 molecular weight of 300 to 30,000; M represents hydrogen, an alkali metal, ammonium or P + (C 6 H 5 ) 3 CH 3 .
Claim 3
Dependent Claim
36 words
The elastomer of claim 1 wherein (a) the polyisocyanate in the prepolymer is 4,4'-methylene bis(cyclohexylisocyanate), hexamethylene diisocyanate or isophorone diisocyanate and (b) the amine-based polyol is N,N-bis(2-hydroxypropyl)aniline, N,N,N',N'-tetrakis(2-hydroxypropyl)ethylenediamine or a polymer of ethylene diamine-propylene oxide-ethylene oxide.
Claim 4
Dependent Claim
27 words
The elastomer of claim 1 wherein the charge-control agent is present (a) in amount of 1 to 6 weight percent of (b) and has the structure ##STR13##
Claim 5
Dependent Claim
77 words
A crosslinked polyurethane elastomer comprising from 0.004 to 0.01 mole percent of a copolymerized polyol charge-control agent having the formula: ##STR14## R 1 represents ##STR15## R 6 represents sulfonate, oxypheylene sulfonate, oxycyclohexylene sulfonate or p-toluenesulfonamidosulfonyl; m and n are integers which together are of sufficient value to achieve an R 1 molcular weight of 300 to 30,000; and M represents hydrogen, an alkali metal, ammonium or P + (C 6 H 5 ) 3 CH 3 .
Claim 6
Dependent Claim
77 words
A crosslinked polyurethane elastomer comprising from 0.004 to 0.01 mole percent of a copolymerized polyol charge-control agent having the formula: ##STR14## R 1 represents ##STR15## R 6 represents sulfonate, oxypheylene sulfonate, oxycyclohexylene sulfonate or p-toluenesulfonamidosulfonyl; m and n are integers which together are of sufficient value to achieve an R 1 molcular weight of 300 to 30,000; and M represents hydrogen, an alkali metal, ammonium or P + (C 6 H 5 ) 3 CH 3 .
Claim 7
Dependent Claim
14 words
The polyurethane elastomers of claim 4 comprising a charge-control agent of the formula: ##STR16##
Claim 8
Dependent Claim
15 words
A shaped article comprising a polyurethane elastomer of claim 1, 2, 3, 4 or 5.
Claim 9
Dependent Claim
28 words
A shaped article comprising: (a) an electrically conducting cylindrical core covered with a layer (b) of a polyurethane elastomer according to claim 1, 2, 3, 4 or 5.
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) | 1991-03-08 | 1991-09-07 | 1992-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-08 | 1995-09-07 | 1996-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-08 | 1999-09-07 | 2000-03-08 | $7700.00 | Window Closed / Lapsed |