摘要:
An electrostatographic suspension developer contains a dispersed pigment and a copolymer ofA. cationic monomers which contain ammonium, phosphonium or sulfonium groups and of which the anions are derived from CH-acidic or sulfur- or phosphorus-containing acidic compounds containing at least one C.sub.6 -C.sub.24 hydrocarbon radical andB. radically polymerizable, olefinically unsaturated compounds as comonomersin an electrically insulating carrier liquid having a volume resistivity of at least 10.sup.9 ohm. cm and a dielectric constant below 3.
摘要:
An electrostatographic suspension developer contains, in an electrically insulating carrier liquid with a volume resistivity of at least 10.sup.9 Ohm. cm and a dielectric constant of below 3, a dispersed pigment and a polymer of basic secondary or tertiary amino group-containing monomers, the amino groups of which are completely or partially neutralized with a Bronsted acid, which contains at least one hydrocarbon radical having from 6 to 24 carbon atoms, and optionally further comonomers.
摘要:
Bead polymers having an average particle diameter of from 0.5 to 10 .mu.m and a narrow particle diameter distribution of K.ltoreq.0.25 and containing from 1 to 60% by weight of chemically bound fluorine are suitable for use as matting agents and spacers in photographic recording materials.
摘要:
The suspension developer contains as a toner polymer-sheathed pigment particles in an electrically insulating carrier liquid. The sheath of the pigment particles is formed by precipitation polymerization from various (meth)acrylates, a cross-linker and, optionally, a vinyl or vinylidene monomer. The developer has an outstanding dispersion stability which does not change during use or storage.
摘要:
The invention relates to copolymers containing 0.01 to 35 mole-% relative to the total monomer composition, of one or more polymerized perfluoroalkyl group-containing monomer units, 55 to 99.99 mole-% of one or more polymerized N-vinylamide monomer units, and 0 to 10 mole-% of one or more further comonomers, a process for the preparation of the copolymers, and their use as emulsifiers and dispersants in aqueous systems.
摘要:
The suspension developer contains, in an electrically-insulating carrier liquid, a pigment and a block copolymer comprising a block of polymerized vinylaromatic compounds and a block of polymerized dienes the double bonds of which have been partially or completely reacted with alkyl mercaptans. The developer is distinguished by its high dispersion stability, small particle size and uniform particle size distribution.
摘要:
Triazolopyrimidines of the formula I ##STR1## in which R.sup.1 denotes CN, alkylsulphonyl, arylsulphonyl or arylR.sup.2 denotes H, alkyl or alkythio,R.sup.3 denotes alkyl, aralkyl, substituted aralkyl, alkenyl or alkynyl,R.sup.4 denotes alkyl, aralkyl or aryl, andR.sup.5 denotes alkyl, aralkyl or aryl, orR.sup.4 and R.sup.5, together with the carbon atom, denote a carbocyclic 5-, 6- or 7-membered ring which may be substituted or bridged,in which R.sup.4 cannot be methyl or aryl when R.sup.1 represents CN, R.sup.2 represents H, R.sup.3 represents methyl and R.sup.5 represents methyl or aryl, and in which alkyl preferably has 1-9 C atoms and aryl preferably has 6-12 C atoms, and also a process for their preparation, and their use as initiators.
摘要:
A dental material is provided based on organic plastics in paste form, which consists essentially of (a) a polymerizable binder, (b) a crosslinked bead polymer and (c) a fine-particled inorganic filler.
摘要:
The new (meth)acrylic acid derivatives containing urethane groups can be prepared by reaction of a (meth)acrylic acid ester with diisocyanates and subsequent reaction with polyols. The compounds can be used for dental materials.
摘要:
(Meth)-acrylic acid esters of the formula ##STR1## in which R.sup.1 and R.sup.2 are each independently hydrogen, chlorine, fluorine or a C.sub.1 - to C.sub.4 -alkyl radical andR.sup.3 and R.sup.4 are identical or different and represent the group ##STR2## wherein Y is a divalent bridge member from the group ##STR3## and Z is a straight-chain or branched hydrocarbon chain which has 2 to 10 carbon atoms, can optionally contain oxygen bridges and is optionally substituted by 1 to 4 acrylate or methacrylate radicals,whereinR.sup.5 represents hydrogen or methyl andR.sup.6 represents hydrogen, C.sub.1 -C.sub.6 - alkyl or phenyl,which are useful as dental materials.