Black perylene pigment and process for producing the same
AssigneeBASF SE
InventorsJin Mizuguchi, Nobuya Shimo
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Abstract
A black perylene-based pigment produced by calcining at least one compound selected from the group consisting of diimide derivatives of perylene tetracarboxylic acid and diimide derivatives of perylene diiminodicarboxylic acid, at a temperature of 200 to 600° C. in vacuum or in an inert gas atmosphere, exhibits an excellent blackness, an excellent heat resistance and an excellent weather fastness as well as a high resistance and a high safety.
Claims2
A process for producing a black perylene-based pigment comprising calcining at least one compound selected from the group consisting of compounds represented by the following formulae (I) to (III), at a temperature of 200 to 600° C. in vacuum or in an inert gas atmosphere
- wherein R1 and R2 are identical to each other and are independently a butyl group, phenylethyl group, methoxyethyl group and 4-methoxyphenylmethyl group;
- and
- R3 and R4 which may be same or different are independently a phenylene group, alkylphenylene group, alkoxyphenylene group, hydroxyphenylene group, halogenated phenylene group, pyridinediyl group, alkylpyridinediyl group, alkoxypyridinediyl group, halogenated pyridinediyl group and naphthalenediyl group.
Dependencies are inferred from the claim text.