摘要:
Anthraquinone dyestuffs of the formula ##STR1## in which R.sub.1 and R.sub.2 denote hydrogen, alkyl, cycloalkyl, aryl or aralkyl, and the said hydrocarbon radicals can be substituted, andQ denotes an aryl radical or heterocyclic radical or an --OR', --SR', --CH.dbd.N--R', ##STR2## --CHO or --SO.sub.2 --O--R' radical, whereinR' represents an aryl, aralkyl or heterocyclic radical, and the radicals mentioned for R' can be substituted,processes for their preparation, and liquid-crystalline materials containing anthraquinone dyestuffs.
摘要:
ANTHRAQUINONE COMPOUNDS OF THE GENERAL FORMULA
1-Z,2-V2,4-V1-ANTHRAQUINONE
WHEREIN Z DENOTES A HYDROGEN ATOM, AN -NH2, -NH-ALKYL, NH-ARYL OR -OH GROUP, V2 DENOTES A HYDROGEN OR HALOGEN ATOM OR AN ALKYL, ALKOXY, CYANO OR SULPHONIC ACID GROUP AND V1 DENOTES A FIVE-MEMBERED HETEROCYCLIC RADICAL WHICH IS BOUND VIA A SULPHUR ATOM TO THE ANTHRAQUINONE NUCLEUS, CONTAINS A FURTHER HETERO-ATOM IN THE RING APART FROM A RING NITROGEN ATOM, AND A SULPHONIC ACID, SULPHONE OR SULPHONAMIDE RADICAL OR A REACTIVE RADICAL, AND WHEREIN THE RING A CAN CONTAIN FURTHER SUBSTITUTENTS.
摘要:
Liquid crystal compositions containing pleochroic dyes. The pleochroic dyes are substituted anthraquinones useful in guest-host combinations with nematic liquid crystal compositions having positive dielectric anisotropy. Electro-optic devices containing these guest-host combinations are employed.
摘要:
Anthraquinone dyestuffs of the formula ##SPC1##In whichX.sub.1 and X.sub.2 denote an amino or hydroxyl group,Y denotes a bridge member,A denotes a heterocyclic radical ##SPC2##Which can optionally be substituted further by non-ionic substituents,Z denotes oxygen, sulphur or a sulphonyl, imino or alkylimino group,Q denotes hydrogen, chlorine or bromine,R.sub.1 and R.sub.2 denote hydrogen, alkyl, aralkyl, cycloalkyl, aryl or heterylAnd whereinR.sub.1 and R.sub.2 can also form, conjointly with the nitrogen atom, the remaining members of a heterocyclic ring as well as a process for their preparation and their use for dyeing synthetic fiber materials.
摘要:
The invention relates to metallic paint comprising water and/or organic solvent and also at least one film-forming agent, at least one organofunctional silane, and at least one metallic effect pigment, the metallic effect pigment being a leafing aluminum pigment.The invention also relates to a process for preparing the metallic paint of the invention, and its use. Also, furthermore, an article painted with the metallic paint of the invention, and a vehicle finish.
摘要:
##STR1## A liquid crystal composition and a display element using the same are disclosed. The composition contains at least one dichroic dye represented by general formula (I), at least one dichroic dye represented by general formula (II), and at least one dichroic dye represented by general formula (III). In formula (I), R1 to R3 each represent a hydrogen atom, an alkyl group, an optionally substituted cycloalkyl group, an alkoxyalkyl group, an alkoxy group or a halogen atom; and A represents (a); in formula (II), R4 and R5 each represents a hydrogen atom, an alkyl group, an optionally substituted cycloalkyl group, an alkoxyalkyl group, an alkoxy group or a halogen atom; in formula (III), R6 represents a hydrogen atom, an alkyl group, an optionally substituted cycloalkyl group, an alkoxyalkyl group, an alkoxy group or a halogen atom. R7 represents a hydrogen atom or (b), and R8 represents a hydrogen atom, an alkyl group, an optionally substituted cycloalkyl group, an alkoxyalkyl, an alkoxy group or a halogen atom.
摘要:
Process for the bulk dyeing of synthetic linear polyesters, characterized in that one or more dyestuffs of the formula ##STR1## WHEREIN R.sub.1 and R.sub.2 denote hydrogen or a non-ionic substituent, m denotes an integer from 0 to 2 and n denotes an integer from 1 to 4 and m and n together are not greater than 4, are employed.
摘要:
Disclosed are thermally-stable, anthraquinone colorant compounds (dyes) which contain one or more vinyl groups which render the compounds copolymerizable with reactive vinyl monomers to produce colored, polymeric compositions such as acrylate and methacrylate polymeric materials. The compounds possess good fastness (stability) to ultraviolet (UV) light, good solubility in vinyl monomers, good color strength and excellent thermal stability. Also disclosed are (1) coating composition comprising (i) one or more polymerizable vinyl compounds, (ii) one or more of the dye compounds described above, and (iii) a photoinitiator and (2) polymeric materials, i.e., polymers derived from one or more acrylic acid esters, one or more methacrylic acid esters, one or more other polymerizable vinyl compounds or mixtures of any two or more thereof, having copolymerized therein one or more of the anthraquinone colorant compounds.
摘要:
An anthraquinone dye and a liquid crystal composition containing the dye are disclosed.The liquid crystal composition is preferably used in an electro-optic cell which enables a good color display utilizing the guest-host effect of the liquid crystal.