发明授权
US06911074B2 Pigments having improved coloristic properties and process for their preparation 有权
具有改进的色素性质的颜料及其制备方法

Pigments having improved coloristic properties and process for their preparation
摘要:
This invention relates to 1,4-diketopyrrolo[3,4c]-pyrrole pigments of the formula characterized by desirable color properties and novel visible absorbance spectra with a steep slope on the bathochromic side of the absorption maximum in the range of from 500 to 650 nm.
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