US4057436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersion of solids in organic solvents
Assignee: Imperial Chemical Industries Ltd
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Filing: 1975-09-15
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Granted: 1977-11-08
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Expires: 1995-09-15
Abstract
Abstract This invention is concerned with dispersions of solids in organic liquids containing polymeric or resinous dispersing agents. The fluidity of such dispersions is greatly improved by the presence in the dispersions of a substituted ammonium salt of a colored acid wherein there are between 16 and 60 carbon atoms contained in at least 3 chains attached to the N-atom of the substituted ammonium ion. The dispersions are particularly useful for the preparation of ink and paints.
Inventors
- 👤 Peter Kingsley Davies
- 👤 Leslie Richard Rogers
- 👤 James Frederick Stansfield
- 👤 Arthur Topham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:12
CPC Classifications
C; C09; C09D; C09D17/00; C09D17/002; C09B; C09B67/00; C09B67/0033; C09B67/006; C09B69/00; C09B69/02; C09B69/04; C09K; C09K23/00; C09K23/16; C09K23/52
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
130 words
A composition comprising a dispersion of from 5% to 70% by weight based on the total weight of the dispersion of a pigment or dyestuff with an average particle size of less than 20 microns in an organic liquid containing dissolved therein from 5% to 100% by weight based on the weight of the pigment or dyestuff of a polymeric or resinous dispersing agent in which the improvement comprises the presence in the dispersion of from 1% to 50% by weight based on the weight of the pigment or dyestuff of a fluidising agent which is a quaternary ammonium salt of a monomeric coloured acid wherein there are from 19 and up to 60 carbon atoms contained in the 4 chains attached to the N-atom of the quaternary ammonium ion.
Claim 2
Dependent Claim
130 words
A composition comprising a dispersion of from 5% to 70% by weight based on the total weight of the dispersion of a pigment or dyestuff with an average particle size of less than 20 microns in an organic liquid containing dissolved therein from 5% to 100% by weight based on the weight of the pigment or dyestuff of a polymeric or resinous dispersing agent in which the improvement comprises the presence in the dispersion of from 1% to 50% by weight based on the weight of the pigment or dyestuff of a fluidising agent which is a quaternary ammonium salt of a monomeric coloured acid wherein there are from 19 and up to 60 carbon atoms contained in the 4 chains attached to the N-atom of the quaternary ammonium ion.
Claim 3
Dependent Claim
21 words
A composition according to claim 1 in which there are between 25 and 40 carbon atoms in the quaternary ammonium ion.
Claim 4
Dependent Claim
22 words
A composition according to claim 1 in which the coloured acid is a phthalocyanine containing a --COOH or --SO 3 H group.
References Cited (Backward Citations)
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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) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |