| 摘要 |
<p>A phthalocyanine product in which at least two phthalocyanine groups which may be metallized or unmetallized are joined by a bridging group, the bridging group being attached to the phthalocyanine groups through -CH2-Xo- linkages where Xo is a basic group and the phthalocyanine groups are attached to the methylene group of the linkages. The phthalocyanine product is useful as a dyestuff.</p> |
