US3884713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pigment dispersions
Assignee: Novartis Corp
•
Filing: 1973-10-05
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Granted: 1975-05-20
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Expires: 1993-10-05
Abstract
Abstract A flocculation-resistant dispersion of a solid in a liquid comprising a particulate solid material, an organic solvent and, as stabiliser, a material which contains groups soluble in the organic solvent, which contains more than one urethane group and which contains no significant proportion of basic amino groups. The pigment dispersions are especially useful for the coloration of gravure inks.
Inventors
- 👤 Robert Langley
- 👤 George Heddle Robertson
- 👤 Christopher James Bridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:18
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0032; C09B67/006; C09B67/0069; C09B67/0071; C09B67/0084; C09D; C09D11/00; C09D11/02; C09D11/03; C09D11/037; C09D17/00; C09D17/002
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
113 words
A FLUOCCULATION-RESISTANT DISPERSION OF A SOLID IN A LIQUID COMPRISING APARTICULATE SOLID MATERIAL SELECTED FROM THE GROUP CONSISTING OF A PIGMENT OR A DYESTUFF, AN ORGANIC SOLVENT SUITABLE AS A DISPERSION MEDIAN FOR SAID PARTICULATE SOLIDS MATERIAL AND AS A STABILIZEER A MATERIAL WHICH CONTAINS GROUPS SOLUBLE IN THE ORGANIC SOLVENT, WHICH CONTAINS MORE THAN ONE URETHANE GROUP AND WHICH CONTAINS NO SIGNIFICANT PROPORTION OF BASIC AMINO GROUPS, WHEREIN SAID STABILIZER IS WITHIN THE RANGE OF FROM 5 TO 200% BY WEIGHT BASED ON THE PARTICULATE SOLID IN THE DISPERSION AND SAID PARTICULATE SOLIDS IS IN THE RANGE OF FROM 10 TO 60% BY WEIGHT BASED ON THE TOTAL WEIGHT OF THE DISPERSION.
Claim 2
Dependent Claim
113 words
A FLUOCCULATION-RESISTANT DISPERSION OF A SOLID IN A LIQUID COMPRISING APARTICULATE SOLID MATERIAL SELECTED FROM THE GROUP CONSISTING OF A PIGMENT OR A DYESTUFF, AN ORGANIC SOLVENT SUITABLE AS A DISPERSION MEDIAN FOR SAID PARTICULATE SOLIDS MATERIAL AND AS A STABILIZEER A MATERIAL WHICH CONTAINS GROUPS SOLUBLE IN THE ORGANIC SOLVENT, WHICH CONTAINS MORE THAN ONE URETHANE GROUP AND WHICH CONTAINS NO SIGNIFICANT PROPORTION OF BASIC AMINO GROUPS, WHEREIN SAID STABILIZER IS WITHIN THE RANGE OF FROM 5 TO 200% BY WEIGHT BASED ON THE PARTICULATE SOLID IN THE DISPERSION AND SAID PARTICULATE SOLIDS IS IN THE RANGE OF FROM 10 TO 60% BY WEIGHT BASED ON THE TOTAL WEIGHT OF THE DISPERSION.
Claim 3
Dependent Claim
23 words
A dispersion as claimed in claim 1 wherein the organic solvent is an aliphatic hydrocarbon compatible with gravure ink systems and paint systems.
Claim 4
Dependent Claim
14 words
A dispersion as claimed in claim 1 wherein the urethane stabilizer has the formula:
Claim 5
Dependent Claim
89 words
A dispersion as claimed in claim 3 wherein R1, R3, R4 and R5 are the same or different and each is an alkyl or cycloalkyl residue having from 2 to 22 carbon atoms, an aralkyl residue having from 7 to 40 carbon atoms or an aryl residue having from 6 to 20 carbon atoms, and wherein R2 is an alkylene residue having from 2 to 20 carbon atoms, an arylene residue having from 6 to 40 carbon atoms or an aralkylene residue having from 7 to 40 carbon atoms.
Claim 6
Dependent Claim
26 words
A dispersion as claimed in claim 3 wherein R2 is a polyfunctional radical containing urethane, ether, ester, urea, amide, hydantoin, alkyl, cycloalkyl, aralkyl, or alkyl groups.
Claim 7
Dependent Claim
27 words
A dispersion as claimed in claim 1 wherein the stabiliser is a complex mixture of products derived from the reaction of a polyisocyanate and a hydroxy compound.
Claim 8
Dependent Claim
14 words
A dispersion as claimed in claim 6 wherein the polyisocyanate is 2,4- tolylene diisocyanate.
Claim 9
Dependent Claim
32 words
A dispersion as claimed in claim 6 wherein the hydroxy compound is p- mixed C7-C18 alkyl phenols, ethylene glycol, p-C15 alkyl phenol, glycerol monooleate, oleyl alcohol or neopentyl glycol or mixtures thereof.
Claim 10
Dependent Claim
34 words
A dispersion as claimed in claim 1, wherein the urethane stabiliser is a urethane obtained by reaction of 4 moles of 2,4-tolylene diisocyanate, 3 mol of ethylene glycol and 2 moles of oleyl alcohol.
Claim 11
Dependent Claim
38 words
A dispersion as claimed in claim 1, wherein the urethane stabiliser is a urethane obatined by reaction of 2 moles of 2,4-tolylene diisocyanate, 1 mole glycerol mono-oleate and 2 moles of a mixture of isomeric metaC15-alkadienyl substituted phenol.
References Cited (Backward Citations)
US3560235A
Cited
US3728301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |