Patent US4113676A successfully refreshed from Google Patents.
US4113676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous dispersions of esters stabilized with carbodiimides
Assignee: PPG Industries Inc
•
Filing: 1977-05-31
•
Granted: 1978-09-12
•
Expires: 1997-05-31
Abstract
Abstract Stabilizing aqueous dispersions of organic ester-containing compositions against degradation with carbodiimides is disclosed.
Inventors
- 👤 Kenneth W. Niederst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:30
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/29; C08L; C08L67/00; C08L71/00; C09; C09D; C09D167/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
25 words
A method for stabilizing aqueous dispersions of organic ester-containing compositions against degradation which comprises adding to said aqueous dispersion a stabilizing amount of a monocarbodiimide.
Claim 2
Independent Claim
25 words
A method for stabilizing aqueous dispersions of organic ester-containing compositions against degradation which comprises adding to said aqueous dispersion a stabilizing amount of a monocarbodiimide.
Claim 3
Dependent Claim
22 words
The method of claim 1 in which the organic ester-containing composition is a polymer having repeating ester linkages in the polymer backbone.
Claim 4
Dependent Claim
21 words
The method of claim 2 in which the polymer is selected from the class consisting of polyesters including alkyds and poly(ester-urethanes).
Claim 5
Dependent Claim
22 words
The method according to claim 1 in which the carbodiimide has aromatic and/or cycloaliphatic substituents substituted in the 2 and 2' position.
Claim 6
Dependent Claim
20 words
The method of claim 4 in which the carbodiimide is selected from the class consisting of substituted phenylmonocarbodiimides and cyclohexylmonocarbodiimides.
Claim 7
Dependent Claim
14 words
The method of claim 5 in which the monocarbodiimides are substituted with alkyl groups.
Claim 8
Dependent Claim
13 words
The method of claim 6 in which the alkyl-substituted monocarbodiimide is 2,2',6,6'-tetraisopropyl-diphenyl carbodiimide.
Claim 9
Dependent Claim
24 words
The method of claim 1 in which the aqueous dispersion contains at least 30 percent water based on total weight of the aqueous medium.
Claim 10
Dependent Claim
32 words
The method of claim 1 in which the carbodiimide is present in the aqueous dispersion in an amount of 0.1 to 10 percent by weight based on weight of the organic ester.
Claim 11
Dependent Claim
33 words
The method of claim 1 in which the carbodiimide is dissolved in a solvent miscible with the organic ester-containing composition and the solution added to the aqueous dispersion of the organic ester-containing composition.
Claim 12
Dependent Claim
16 words
An aqueous dispersion of an organic ester-containing composition prepared according to the method of claim 1.
Claim 13
Dependent Claim
23 words
The aqueous dispersion of claim 11 in which the organic ester-containing composition is a polymer having repeating ester units in the polymer backbone.
Claim 14
Dependent Claim
22 words
The aqueous dispersion of claim 12 in which the polymer is selected from the class consisting of polyesters including alkyds and poly(ester-urethanes).
Claim 15
Dependent Claim
22 words
The aqueous dispersion of claim 11 in which the carbodiimide has aromatic and/or cycloaliphatic substituents substituted in the 2 and 2' position.
Claim 16
Dependent Claim
20 words
The aqueous dispersion of claim 14 in which the carbodiimide is selected from the class consisting of phenylmonocarbodiimides and cyclohexylmonocarbodiimides.
Claim 17
Dependent Claim
15 words
The aqueous dispersion of claim 15 in which the monocarbodiimides are substituted with alkyl groups.
Claim 18
Dependent Claim
14 words
The aqueous dispersion of claim 16 in which the alkyl-substituted monocarbodiimide is 2,2',6,6'-tetraisopropyl-diphenyl carbodiimide.
Claim 19
Dependent Claim
23 words
The aqueous dispersion of claim 11 which contains at least 30 percent by weight water based on total weight of the aqueous dispersion.
Claim 20
Dependent Claim
34 words
The aqueous dispersion of claim 11 in which the carbodiimide is present in the aqueous dispersion in an amount of 0.1 to 10 percent by weight based on total weight of the organic ester.
References Cited (Backward Citations)
US3193524A
Cited
US3193522A
Cited
US3193523A
Cited
US3463758A
Cited
US3752778A
Cited
US3639353A
Cited
US3709846A
Cited
US3716502A
Cited
US3893959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |