US4820863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface active polycarbodiimides
Assignee: Union Carbide Corp
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Filing: 1986-03-31
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Granted: 1989-04-11
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Expires: 2006-03-31
Abstract
Abstract Disclosed are surface-active polycarbodiimides containing a hydrophilic portion and a hydrophobic portion joined through the reaction of a carbodiimide group with a reactive functional group. The surface-active polycarbodiimides may be linear or branched, monodisperse or polydisperse, but preferably are of the branched, monodisperse type. The surface-active polycarbodiimides are useful as surfactants, and are particularly useful as emulsifiers in cross-linkable, carboxyl-containing resin systems, such as aqueous latexes.
Inventors
- 👤 James W. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:28
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08K; C08K5/00; C08K5/16; C08K5/29; C09; C09K; C09K23/00; C09K23/16; C09K23/22; Y; Y10; Y10S; Y10S260/00; Y10S260/21; Y10S260/45; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05; Y10S516/06; Y10S516/07; Y10S516/905; Y10S516/914; Y10S516/915; Y10S516/916; Y10S525/00; Y10S525/907
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
86 words
A surface-active polycarbodiimide of the formula R--X--R' wherein R is a residue of a hydrophobic organic compound containing at least two carbodiimide groups; R' is a residue of an organic compound having a hydrophilic segment and at least one functional group capable of reacting with a carbodiimide group; and X is a group formed by the reaction of a said carbodiimide group with a said functional group; wherein R' is a residue of a hydroxyl-containing poly(alkylene oxide)-based surfactant and wherein the poly(alkylene oxide)-based surfactant is alkoxy-capped.
Claim 2
Dependent Claim
86 words
A surface-active polycarbodiimide of the formula R--X--R' wherein R is a residue of a hydrophobic organic compound containing at least two carbodiimide groups; R' is a residue of an organic compound having a hydrophilic segment and at least one functional group capable of reacting with a carbodiimide group; and X is a group formed by the reaction of a said carbodiimide group with a said functional group; wherein R' is a residue of a hydroxyl-containing poly(alkylene oxide)-based surfactant and wherein the poly(alkylene oxide)-based surfactant is alkoxy-capped.
Claim 3
Dependent Claim
15 words
A surface-active polycarbodiimide of claim 1 wherein the poly(alkylene oxide)-based surfactant is a methoxypolyethylene glycol.
Claim 4
Dependent Claim
22 words
A surface-active polycarbodiimide of claim 1 wherein the number of alkylene oxide repeating units (n) is from about 15 to about 120.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |