US4127420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Comminution process and pigment
Assignee: Pigment Manufacturers of Australia Ltd
•
Filing: 1976-09-27
•
Granted: 1978-11-28
•
Expires: 1996-09-27
Abstract
Abstract A process of comminution comprising firstly grinding a mixture of a crude pigment and a fugitive auxiliary and secondly deactivating the fugitive auxiliary.
Inventors
- 👤 Dominic R. Harris
- 👤 Lance E. Rowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:48
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0002; C09B67/0022; C09B67/0071; C09B67/0084; C09B67/0085; C09B67/0086
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
137 words
In a process of comminution comprising grinding a mixture of a crude pigment and a fugitive auxiliary wherein the fugitive auxiliary is a long chain alkyl glycoside, or an alkali metal, ammonium or water soluble amine salt of a phosphate or sulfate ester of a long chain alcohol or a long chain alcohol alkoxylate, a long chain alkyl ester sulfonate, or a long chain alkyl sulfosuccinate, said fugitive auxiliary being suitable as a dispersant or colloidal stabilizer in the process of comminution but sufficiently labile so as to be capable of being deactivated or removed without adversely influencing the properties of the pigment, the improvement which comprises deactivating the fugitive auxiliary by hydrolysis and removing the remaining long chain alcohol or long chain alcohol alkoxylate residues from the pigment composition by steam distillation or high temperature drying.
Claim 2
Dependent Claim
137 words
In a process of comminution comprising grinding a mixture of a crude pigment and a fugitive auxiliary wherein the fugitive auxiliary is a long chain alkyl glycoside, or an alkali metal, ammonium or water soluble amine salt of a phosphate or sulfate ester of a long chain alcohol or a long chain alcohol alkoxylate, a long chain alkyl ester sulfonate, or a long chain alkyl sulfosuccinate, said fugitive auxiliary being suitable as a dispersant or colloidal stabilizer in the process of comminution but sufficiently labile so as to be capable of being deactivated or removed without adversely influencing the properties of the pigment, the improvement which comprises deactivating the fugitive auxiliary by hydrolysis and removing the remaining long chain alcohol or long chain alcohol alkoxylate residues from the pigment composition by steam distillation or high temperature drying.
Claim 3
Dependent Claim
12 words
A process according to claim 1 wherein the pigment is copper phthalocyanine.
Claim 4
Dependent Claim
65 words
A process according to claim 1 wherein the fugitive auxiliary is a phosphate or sulphate ester of a C 8 to C 20 alcohol or a C 8 to C 20 alcohol alkoxylate, a C 8 to C 20 alkyl ester sulphonate or a C 8 to C 20 alkyl sulphosuccinate, employed in the form of an alkali metal, ammonium or water soluble amine salt.
Claim 5
Dependent Claim
56 words
A process according to claim 1 wherein the fugitive auxiliary is a phosphate or sulphate ester of a C 8 to C 20 primary alcohol or a C 8 to C 20 primary alcohol ethoxylate containing from 1 to 20 ethyleneoxy groups, employed in the form of an alkali metal, ammonium or water soluble amine salt.
Claim 6
Dependent Claim
19 words
A process according to claim 1 wherein the fugitive auxiliary is deactivated by hydrolysis of the labile ionogenic group.
Claim 7
Dependent Claim
18 words
A process according to claim 5 wherein the hydrolysis is effected under acidic conditions at an elevated temperature.
Claim 8
Dependent Claim
26 words
A process according to claim 1 wherein 5 to 40 parts by weight of fugitive auxiliary per 100 parts by weight of crude pigment is used.
Claim 9
Dependent Claim
23 words
A process according to claim 7 wherein the amount of fugitive auxiliary used is 5 to 20% by weight of the crude pigment.
Claim 10
Dependent Claim
16 words
A process according to claim 1 wherein an organic solvent is added to the comminution media.
Claim 11
Dependent Claim
15 words
A process according to claim 9 wherein the organic solvent is an alkyl glycol ether.
Claim 12
Dependent Claim
13 words
A process according to claim 10 wherein the alkyl glycol ether is 2-butoxyethanol.
Claim 13
Dependent Claim
27 words
A process according to claim 9 wherein from 4 to 60 parts by weight of organic solvent is used per 100 parts by weight of crude pigment.
Claim 14
Dependent Claim
24 words
A process according to claim 12 wherein the amount of organic solvent used is 10 to 15 percent by weight of the crude pigment.
Claim 15
Dependent Claim
55 words
A process according to claim 1 wherein first crude copper phthalocyanine is comminuted using about 16 percent by weight based on the crude pigment of sodium lauryl sulphate as fugitive auxiliary and secondly after completion of comminution the sodium lauryl sulphate is deactivated by hydrolysis to lauryl alcohol under acidic conditions at an elevated temperature.
Claim 16
Dependent Claim
16 words
A process according to claim 1 wherein the drying occurs at a temperature between 120°-130° C.
Claim 17
Dependent Claim
55 words
A process according to claim 1 wherein the fugitive auxiliary is sodium lauryl sulphate, the sodium salt of the sulphate ester of a substantially linear primary alcohol containing an average of 10 carbon atoms or the ammonium salt of the sulphate ester of a substantially linear primary alcohol containing an average of 10 carbon atoms.
Claim 18
Dependent Claim
71 words
A process according to claim 1 wherein first crude copper phthalocyanine is comminuted using about 14% by weight based upon the crude pigment of the sodium salt of the sulphate ester of a substantially linear primary alcohol containing an average of 10 carbon atoms as fugitive auxiliary and secondly after completion of comminution said fugitive auxiliary is deactivated by hydrolysis to the primary alcohol under acidic conditions at an elevated temperature.
Claim 19
Dependent Claim
8 words
A pigmentary composition prepared according to claim 1.
Claim 20
Dependent Claim
8 words
A pigmentary composition prepared according to claim 2.
Claim 21
Dependent Claim
8 words
A pigmentary composition prepared according to claim 14.
Claim 22
Dependent Claim
8 words
A pigmentary composition prepared according to claim 17.
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) | 1981-11-27 | 1982-05-29 | 1982-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-27 | 1986-05-29 | 1986-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-27 | 1990-05-29 | 1990-11-28 | $7700.00 | Window Closed / Lapsed |