摘要:
Disclosed is the use of highly functional, highly branched or hyperbranched polycarbonates as a dispersing agent for pigments. Said polycarbonates can be obtained by a) producing one or several different condensation products (K) by a1) reacting at least one organic carbonate (A) of general formula RO[(CO)O]nR with at least one aliphatic, aliphatic/aromatic, or aromatic alcohol (B) comprising at least 3 OH groups while eliminating alcohols ROH, R independently representing a linear or branched aliphatic, aromatic/aliphatic, or aromatic hydrocarbon radical containing 1 to 20 C atoms, and radicals R being optionally interconnected so as to form a ring containing the grouping -O[(CO)O]n-, and n representing an integer ranging from 1 to 5, or a2) reacting phosgene, diphosgene, or triphosgene with the aliphatic, aliphatic/aromatic, or aromatic alcohol (B) while releasing hydrogen chloride, the quantitative ratio between alcohols (B) and the carbonates (A) or the phosgenes in the reaction mixture being selected such that the condensation products (K) on average are provided with one carbonate group or carbamyl chloride group and more than one OH group or one OH group and more than one carbonate group or carbamyl chloride group, and b) intermolecularly reacting the condensation products (K) obtained in step a).
摘要:
The invention relates to light-colored engineered wood boards produced from wood fibers that are bleached and dyed with liquid dye preparations. Said preparations comprise at least one pigment and at least one dye that absorbs light in the visible range of the electromagnetic spectrum.
摘要:
The present invention relates to a process for the production of bleached wood particles and a process for the production of pale to white wood-base materials which are produced from the bleached wood particles.
摘要:
Disclosed is the use of solid pigment preparations containing (A) 30 to 90 percent by weight of at least one pigment and (B) 10 to 70 percent by weight of at least one water-soluble surface-active additive as essential components for dyeing composite cellulose/polymer materials.
摘要:
Disclosed is the use of highly functional, highly branched or hyperbranched polycarbonates as a dispersing agent for pigments. Said polycarbonates can be obtained by a) producing one or several different condensation products (K) by a1) reacting at least one organic carbonate (A) of general formula RO[(CO)O]nR with at least one aliphatic, aliphatic/aromatic, or aromatic alcohol (B) comprising at least 3 OH groups while eliminating alcohols ROH, R independently representing a linear or branched aliphatic, aromatic/aliphatic, or aromatic hydrocarbon radical containing 1 to 20 C atoms, and radicals R being optionally interconnected so as to form a ring containing the grouping -O[(CO)O]n-, and n representing an integer ranging from 1 to 5, or a2) reacting phosgene, diphosgene, or triphosgene with the aliphatic, aliphatic/aromatic, or aromatic alcohol (B) while releasing hydrogen chloride, the quantitative ratio between alcohols (B) and the carbonates (A) or the phosgenes in the reaction mixture being selected such that the condensation products (K) on average are provided with one carbonate group or carbamyl chloride group and more than one OH group or one OH group and more than one carbonate group or carbamyl chloride group, and b) intermolecularly reacting the condensation products (K) obtained in step a).
摘要:
The present invention relates to a method for the production of bleached wood particles, and to a method for the production of wood materials ranging from light-toned to white, which are produced from the bleached wood particles.
摘要:
The invention relates to a method for the formation of an organic pigment, wherein the pigment is dissolved or dispersed in an aqueous solvent or a mineral acid and is allowed to crystallize from the solution or dispersion in the presence of a crystallization modifier and is subsequently isolated as a solid, wherein the crystallization modifier is a condensation product of at least one hydroxyaryl sulfonic acid having sulfonate groups and/or at least one hydroxydiaryl sulfone compound and at least one aliphatic aldehyde with 1-6 carbon atoms, optionally containing urea and possibly an alkali sulfite, or a mixture of such condensation products.
摘要:
The invention relates to a method for producing pigment preparations, which method is characterized by dispersing in an apparatus (a) at least one pigment in the presence of (b) at least one emulsions copolymer having an average molecular weight Mw of at least 150.000 g/mol, which comprises at least one C1-C10 alkylester or at least one ω-hydroxy-C2-C4 alkylene ester of at least one ethylenically unsaturated C3-C10 carboxylic acid or at least one vinyl-aromatic compound polymerized into it, and (c) water.