Abstract:
The invention concerns the use of hyperbranched polymers and dendrimers, comprising at least one group of formula (I) in which: Y represents the oxygen atom or a NH group; and A represents a C1-C12 alkane di-yl group, linear, branched or cyclic, saturated or unsaturated; said group being optionally interrupted by one or several heteroatoms and/or substituted by a function selected among: amino (-NH2): acylamino (-NH-CO-R) in which R represents a C1-C10 alkyl group, linear, branched or cyclic, saturated or unsaturated; carboxylic acid (-COOH), ester (-COOR) in which R represents a C1-C10 alkyl group, linear, branched or cyclic, saturated or unsaturated, as film-forming agent. The invention also concerns a film-forming composition comprising said compound and its use particularly in cosmetics or pharmaceutics.
Abstract:
A compound obtainable by reacting a core compound obtainable from a Michael addition reaction of polyamino compound (a) having at least one primary or secondary amino group and an active-hydrogen-containing (meth)acrylic compound (b-1), with a vinyl-group-containing compound (c) having a functional group reactable with the active hydrogen, for use as a film forming material such as a coating composition or an ink or as a resin for a sealant, a molding material, an adhesive or tackiness agent or for use as a curing agent or a reactive diluent for a curable composition.
Abstract:
The present invention provides a composition comprising a pigment and from 0.1 to 10% by weight, based on the weight of pigment, of at least one dendrimer.
Abstract:
This invention comprises a single-component dendrimeric toner particle (10, 30), and methods of making and using the toner particle (10, 30) in the liquid EP process. By using dendrimeric chemistry, a dendrimeric toner particle (10, 30) may be made that has controlled content, structure and size and that includes a colorant (11), a binder, and a charge director (34). The toner particles (10, 30) made this way will have high uniformity, so that toner dispersions containing them may be made to have good stability, print performance, and quality control. The colorant (11) of choice for the toner particle is made the core (40) of the dendrimer toner particle (10, 30). Dendrons (24, 38), which are made of generations of building or polymer units (13, 16), branch out from the core (40) and include a resin or other binder molecule, for binding the colorant (11) to the paper in the EP process. One or more of the final polymer units (20), located at the terminus of the dendrons (24, 38), comprise a coordinating or chelating agent (32) for the toner charge director (34).
Abstract:
For preparing a polyether-dendrimer-alkali metal salt (a) a polyvalent core W(X) n wherein W is a polyvalent core atom which is covalently bonded to nX reactive terminal OH-groups (n≧2) is converted into its correponding alkali metal salt by reaction of the polyvalent core with alkali metal hydroxide or zero valence alkali metal, (b) the obtained salt is reacted with a molar excess of a partially protected multifunctional reagent T-(U) V m wherein U represents a multivalent moiety covalently bonded to m V protected moieties (m≧2) and to one T, a moiety capable of reacting with X to form W[(X'-T')U V m ] n , wherein X' and T' represent the residue of reaction between X and T, (c) the obtained first generation compound is activated by de-protecting it, (d) the activated compound is converted into alkali metal salt form by reaction with alkali metal hydroxide or zero valence alkali metal, and, if desired, (e) the alkali metal salt is reacted with further partially protected reagent T-U- V m to form the second generation protected dendrimer, (f) and steps (c) and (d) are repeated to provide higher generation dendrimer alkali metal salts.
Abstract:
This invention is directed to dense star polymers and to a process for producing dense star polymers. The star polymers of this invention have at least one core branch eminating from a core, each core branch having at least one terminal group provided that (1) the ratio of terminal groups to the core branches is greater than 1 : 1, (2) the density of terminal groups per unit volume in the polymer is at least 1.5 times that of conventional star polymer having similar core and monomeric moieties and a comparable molecular weight and number of core branches, each of such branches of the conventional star polymer bearing only one terminal group and (3) a molecular volume that is no more than 60 percent of the molecular volume of said conventional star polymer. Such star polymers are useful as demulsifiers for oil/water emulsions, wet strength agents in the manufacture of paper and agents for modifying viscosity in aqueous formulations such as paints.
Abstract:
L'invention se rapporte à une macromolécule dendritique comprenant un noyau, ainsi que des branches émanant dudit noyau et caractérisée par le fait que lesdites branches sont préparées à partir d'unités de cyanure de vinyle. L'invention se rapporte également à un procédé de préparation de la macromolécule dendritique. Les macromolécules dendritiques décrites par l'invention ne sont pas sensibles à la dégradation provoquée par des réactions hydrolytiques et sont également très stables à températures élevées. Le procédé est approprié à une mise en application à grande échelle et les intermédiaires synthétisés ne nécessitent pas d'isolation.
Abstract:
The present invention relates to optical elements, such as ophthalmic elements, including a substrate, a compatiblizing coating that optionally includes a dendritic polymer on at least a portion of the surface of the substrate and a functional organic coating, such as, but not limited to, an alignment coating, a photochromic coating, or an aligned liquid crystal coating, in contact with at least a portion of the compatiblizing coating opposite the substrate. The present invention also relates to compatiblizing coating compositions of dendritic polymers that may be used to form compatiblizing coatings on the surface of an optical element, and methods of making optical elements using the compatiblizing coatings. The coating compositions comprise at least one of an isocyanate-containing material comprising at least two reactive functional groups at least one of which is an isocyanate group; and an aminoplast resin comprising at least two reactive functional groups. Optical and ophthalmic elements and their manufacture are also disclosed.
Abstract:
There is provided a novel primer for use in the pretreatment step in electroless plating that is environmentally friendly, can be easily treated in fewer steps, can achieve a cost reduction, and is especially excellent in adhesion between a base material to be plated and a metallic film. A primer for forming a metal plating film on a base material by electroless plating, the primer comprising: (a) a hyperbranched polymer having an ammonium group at a molecular terminal and having a weight-average molecular weight of 1,000 to 5,000,000; (b) metal fine particles; and (c) a resin primer for electroless plating.