US4271301A
Expired / Lapsed
US
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Preparation of pigmentary form isoindoline
Assignee: BASF SE
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Filing: 1979-01-05
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Granted: 1981-06-02
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Expires: 1999-01-05
Abstract
Abstract A process for converting finely particled agglomerated crude isoindoline pigments of the formula ##STR1## where A is ##STR2## and B is the radical of an unsubstituted or substituted barbituric acid, or A and B are both such a barbituric acid radical, into tinctorially valuable pigmentary forms, wherein the crude pigment, which consists of primary particles having a mean size of ≦0.1 μm, is subjected to shearing forces in water, and thereafter the aqueous suspension is heated at from 90° to 160° C. in the presence or absence of a surfactant and the pigment is isolated. Easily dispersible, high-hiding to extremely high-hiding pigments are obtained, which give brilliant colorations of improved lightfastness and fastness to weathering.
Inventors
- 👤 Wolfgang Lotsch
- 👤 Peter Hilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:52
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0014; C09B57/00; C09B57/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
114 words
A process for the preparation of a brilliant, easily dispersible and high-hiding pigmentary form of an isoindoline pigment of the formula ##STR7## wherein A is ##STR8## or is a substituted or unsubstituted barbituric acid radical, and B is a substituted or unsubstituted barbituric acid radical, which comprises subjecting a suspension which consist essentially of the agglomerated crude pigment, in which the primary particles have a mean particle size of ≦0.1 μm to shearing forces in water in the presence of grinding media or in a kneader, thereafter refluxing the resulting aqueous suspension at from 90° to 160° C. in the presence or absence of a surfactant for 10-30 hours, and isolating the resulting pigment.
Claim 2
Dependent Claim
114 words
A process for the preparation of a brilliant, easily dispersible and high-hiding pigmentary form of an isoindoline pigment of the formula ##STR7## wherein A is ##STR8## or is a substituted or unsubstituted barbituric acid radical, and B is a substituted or unsubstituted barbituric acid radical, which comprises subjecting a suspension which consist essentially of the agglomerated crude pigment, in which the primary particles have a mean particle size of ≦0.1 μm to shearing forces in water in the presence of grinding media or in a kneader, thereafter refluxing the resulting aqueous suspension at from 90° to 160° C. in the presence or absence of a surfactant for 10-30 hours, and isolating the resulting pigment.
Claim 3
Dependent Claim
27 words
A process as claimed in claim 1, wherein an agglomerated crude pigment in which the primary particles have a mean particle size of ≦0.02 μm, is employed.
Claim 4
Dependent Claim
31 words
A process as claimed in claim 1 or 2, wherein the shearing forces are generated in the aqueous suspension of the fine-particled agglomerated crude pigment by means of agitated milling bodies.
Claim 5
Dependent Claim
58 words
A process as claimed in claim 1 or 2, wherein a crude pigment is used in which A is ##STR9## and B is a radical of unsubstituted barbituric acid, of N-phenylbarbituric acid, of 2-thiobarbituric acid, of 2-iminobarbituric acid or of 2-N-cyanoiminobarbituric acid, or A and B are each one of the radicals mentioned in the definition of B.
Claim 6
Dependent Claim
34 words
A process as claimed in claim 1 or 2, wherein A and B are each a radical of unsubstituted barbituric acid or A is ##STR10## and B is the radical of unsubstituted barbituric acid.
Claim 7
Dependent Claim
77 words
A process as claimed in claim 1 or 2, wherein the aqueous suspension is heated in the presence of an adduct of ethylene oxide, propylene oxide or propylene oxide and ethylene oxide with a C 8 -C 20 -alkanol, C 2 -C 10 -alkanediol, C 3 -C 10 -alkanepolyol, phenol, C 6 -C 18 -alkylphenol, C 8 -C 20 -carboxylic acid, C 8 -C 20 -carboxylic acid amide or aliphatic, cycloaliphatic or benzene-aromatic monoamine, diamine or polyamine.
Claim 8
Dependent Claim
93 words
A process as claimed in claim 1 or 2, wherein the aqueous suspension is heated in the presence of an alkali metal salt or ammonium salt of a C 4 -C 20 -alkylbenzenesulfonic acid, C 4 -C 20 -alkylphenolsulfonic acid, mono- or bis- C 1 -C 10 -alkylnaphthalenesulfonic acid, partially sulfonated polystyrene, water-soluble condensation product of β-naphthalenesulfonic acid or of a C 1 -C 10 -alkylnaphthalene-β-sulfonic acid, or of a mixture of these, with formaldehyde, condensation product of a phenolsulfonic acid, formaldehyde and urea, ligninsulfonic acid or C 7 -C 20 -rosin acid.
Claim 9
Dependent Claim
96 words
A process as claimed in claim 4, wherein the aqueous suspension is heated in the presence of an alkali metal or ammonium salt of a C 1 -C 5 -alkylnaphthalenesulfonic acid, a condensation product of phenol, urea and formaldehyde, an adduct of ethylene oxide, propylene oxide or propylene oxide and ethylene oxide with a C 2 -C 20 -alkanol, C 3 -C 10 -alkanediol, aliphatic C 1 -C 20 -carboxylic acid or aliphatic C 1 -C 20 -carboxylic acid amide, C 10 -C 20 -fatty alcohol or a mixture of the said agents as the surfactant.
Claim 10
Dependent Claim
23 words
A process as claimed in claim 8, wherein the amount of surfactant, based on crude pigment, is from 1 to 100% by weight.
Claim 11
Dependent Claim
14 words
The process of claim 1, wherein said heating is carried out for 15-30 hours.
Claim 12
Dependent Claim
119 words
A process for the preparation of a brilliant, easily dispersible and high-hiding pigmentary form of an isoindoline pigment of the formula: ##STR11## wherein A is ##STR12## or is a substituted or unsubstituted barbituric acid radical, and B is a substituted or unsubstituted barbituric acid radical, which comprises: subjecting a suspension which consists essentially of the agglomerated crude pigment, in which the primary particles have a mean particle size of ≦0.1 μm to shearing forces in water in the presence of grinding media or in a kneader, thereafter heating the resulting aqueous suspension for from 3 to 20 hours at from 110° to 140° C. under pressure in the presence or absence of a surfactant, and isolating the resulting pigment.
Claim 13
Dependent Claim
119 words
A process for the preparation of a brilliant, easily dispersible and high-hiding pigmentary form of an isoindoline pigment of the formula: ##STR11## wherein A is ##STR12## or is a substituted or unsubstituted barbituric acid radical, and B is a substituted or unsubstituted barbituric acid radical, which comprises: subjecting a suspension which consists essentially of the agglomerated crude pigment, in which the primary particles have a mean particle size of ≦0.1 μm to shearing forces in water in the presence of grinding media or in a kneader, thereafter heating the resulting aqueous suspension for from 3 to 20 hours at from 110° to 140° C. under pressure in the presence or absence of a surfactant, and isolating the resulting pigment.
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) | 1984-06-01 | 1984-12-01 | 1985-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-01 | 1988-12-01 | 1989-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-01 | 1992-12-01 | 1993-06-02 | $7700.00 | Window Closed / Lapsed |