摘要:
Uniformly dyed water-swellable cellulosic fibers obtained by dyeing cellulosic fibers in the swollen state with a dye of the formula ##STR1## in which D is the radical of a diazo component and R is an aliphatic, cycloaliphatic or araliphatic radical. The fibers are eminently suitable as textile material.
摘要:
Disclosed is a photosensitive material for electrophotography, which comprises a photosensitive layer containing a disazo pigment represented by the following formula: ##STR1## wherein R.sub.1 stands for a lower alkyl group or a lower alkoxy group, n is a number of zero, 1 or 2, R.sub.2 stands for a lower alkyl group, a lower alkoxy group, a di-lower-alkylamino group, a nitro group or a halogen atom, m is a number of zero, 1 or 2, Z stands for a benzene ring or a naphthalene ring, and Y stands for a group represented by the following formula: ##STR2## in which B stands for a benzene, naphthalene, indole, carbazole or benzofuran ring or a substitution product thereof, which is fused to the benzene ring, Ar.sub.1 and Ar.sub.2 stand for a benzene ring, a naphthalene ring, a dibenzofuran ring or a substitution product thereof, R.sub.3 stands for a lower alkyl group, a carboxyl group or a carboxyl ester group, and R.sub.4 stands for a hydrogen atom, a lower alkyl group, a phenyl group or a substituted phenyl group.
摘要:
244,639. Foster, G. H. May 4, 1925. Pins, dowel and like.- A dowelled joint for woodwork is made by forming registering holes having undercut ends in the pieces to be joined and inserting expansible wooden dowels therein. The dowels 4 have axial holes at opposite ends and are expanded by tapered pins 7, 8.
摘要:
The invention relates to disazo pigments of the formula ##STR1## wherein R is an ethyl, propyl or isopropyl radical. These pigments colour plastics, especially rigid PVC, in brown shades of excellent fastness properties.
摘要:
WHEREIN R REPRESENTS AN ALKYL, PHENYL OR NAPHTHYL RRADICAL, X HALOGEN, METHYL OR PHENOXY AND AR A PHENYLENE OR NAPHTHYLENE RADICAL ARE VALUABLE PIGMENTS FOR COLORING PLASTICS IN RED SHADES.