US4148665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rosin dispersions of improved stability
Assignee: Wyeth Holdings LLC
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Filing: 1977-09-22
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Granted: 1979-04-10
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Expires: 1997-09-22
Abstract
Abstract Colloidal aqueous dispersions of rosin possess improved mechanical and heat stability when they have a small dissolved content of a water-dispersible emulsifying agent selected from the group consisting of tetrasodium N-(1,2-dicarboxyethyl)-N-octadecylsulfosuccinamate, disodium N-octadecylsulfosuccinate, disodium dodecylpenta(ethoxy) ethylsulfosuccinate, and disodium decylsulfosuccinate as stabilizing agent.
Inventors
- 👤 Russell J. Kulick
- 👤 Sewell T. Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:35
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/05; D; D21; D21H; D21H17/00; D21H17/62; C08J2393/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
A rosin dispersion consisting essentially of colloidal particles of a paper-sizing rosin as dispersed phase in an acidic aqueous medium as continuous phase, said medium having a small but effective dissolved content of a water-dispersible hydrophobic-hydrophilic emulsifying agent selected from the group consisting of tetrasodium N-(1,2-dicarboxyethyl)-N-octadecylsulfosuccinamate, disodium N-octadecylsulfosuccinamate, disodium dodecylpenta(ethoxy)ethyl sulfosuccinate, and disodium decylsulfosuccinate as agent improving the mechanical stability of said dispersion, the hydrophilic-hydrophobic balance being such that said agent is at least colloidally soluble in water, and the amount of said aqueous medium being such that the dispersion is of pumpable viscosity.
Claim 2
Dependent Claim
94 words
A rosin dispersion consisting essentially of colloidal particles of a paper-sizing rosin as dispersed phase in an acidic aqueous medium as continuous phase, said medium having a small but effective dissolved content of a water-dispersible hydrophobic-hydrophilic emulsifying agent selected from the group consisting of tetrasodium N-(1,2-dicarboxyethyl)-N-octadecylsulfosuccinamate, disodium N-octadecylsulfosuccinamate, disodium dodecylpenta(ethoxy)ethyl sulfosuccinate, and disodium decylsulfosuccinate as agent improving the mechanical stability of said dispersion, the hydrophilic-hydrophobic balance being such that said agent is at least colloidally soluble in water, and the amount of said aqueous medium being such that the dispersion is of pumpable viscosity.
Claim 3
Dependent Claim
12 words
A dispersion according to claim 1 wherein the agent is tetrasodium N-(1,2-dicarboxyethyl)-N-octadecylsulfosuccinamate.
Claim 4
Dependent Claim
12 words
A dispersion according to claim 1 wherein the agent is disodium N-octadecylsulfosuccinamate.
Claim 5
Dependent Claim
12 words
A dispersion according to claim 1 wherein the agent is sodium dodecylpenta(ethoxy)ethylsulfosuccinate.
Claim 6
Dependent Claim
12 words
A dispersion according to claim 1 wherein the agent is disodium decylsulfosuccinate.
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) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |