Claims
- 1. A composition comprising(a) a mixture of copper phthalocyanines containing, on average, from 0.1 to 3 methyl groups per phthalocyanine nucleus; and (b) a deflocculating agent comprising a copper phthalocyanine containing up to four basic groups selected from those of Formulae (1) and (2), wherein, R1 & R2 are each independently H or C1-4-alkyl; and R is selected from alkylene, alkenylene and cycloalkylene.
- 2. A composition according to claim 1 wherein the mixture of copper phthalocyanine (a) contains from 0.2 to 1.0 methyl groups per phthalocyanine nucleus.
- 3. A composition according to claim 1 wherein the mixture of copper phthalocyanine (a) contains from 0.3 to 0.7 methyl groups per phthalocyanine nucleus.
- 4. A composition according to claim 1 wherein the mixture of copper phthalocyanines (a) comprises unsubstituted copper phthalocyanine and at least one species selected from the group consisting of copper monomethylphthalocyanine, copper dimethyl-phthalocyanine, copper trimethylphthalocyanine and copper tetramethyl-phthalocyanine.
- 5. A composition according to claim 4 wherein the mixture of copper phthalocyanine comprises a preponderance of unsubstituted copper phthalocyanine and copper monomethylphthalocyanine.
- 6. A composition according to claim 4 or claim 5 wherein at least 98% of any unsubstituted copper phthalocyanine is in the alpha-form.
- 7. A paint comprising a dispersion of a pigment composition according to claim 1 in an organic solvent.
- 8. A plastics material containing dispersed therein a pigment composition according to claim 1.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9202291 |
Feb 1992 |
GB |
|
Parent Case Info
This is a continuation of application Ser. No. 08/188,742, filed on Jan. 31, 1994, now abandoned, which was abandoned upon the filing hereof, which is a Rule 62 FWC of application Ser. No. 08/011,695, filed Feb. 1, 1993, abandoned.
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Date |
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3028392 |
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Apr 1962 |
|
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Apr 1973 |
|
4152171 |
Barraclough et al. |
May 1979 |
|
5024926 |
Itoh et al. |
Jun 1991 |
|
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Country |
239496 |
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CS |
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EP |
2207172 |
Jun 1974 |
FR |
2321527 |
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FR |
1422834 |
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GB |
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Non-Patent Literature Citations (2)
Entry |
Chemical Abstracts, vol. 95, No. 8, Abstract No. 63686K, Aug. 24, 1981. |
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Continuations (2)
|
Number |
Date |
Country |
Parent |
08/188742 |
Jan 1994 |
US |
Child |
08/338830 |
|
US |
Parent |
08/011695 |
Feb 1993 |
US |
Child |
08/188742 |
|
US |