Abstract:
The present invention provides a silicone derivatized macromolecule that is supported on a particulate support or a separation membrane and method for making that composition. The silicon-derivatized macromolecule can also be combined with chiral ligands or chelated metals. The applications for the silicone derivatized macromolecule variety including use in HPLC separations, in purification process and in personal care formulations.
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 substrate having a dendrimer monolayer film thereon is provided. The film can comprise either dendrimers, or dendrons (dendrimer branches). In each case, the monolayer films are covalently bonded to the desired surface. The resulting structure can be employed in a variety of applications including chemical sensors.
Abstract:
The invention relates to a hyperbranched polymer comprising a nucleus and polyol and polycarboxy residues, the hyperbranched polymer having at least 6 terminal hydroxyl- or carboxyl groups and a Carothers gel point lower than 1. The hyperbranched polymer having at least 6 terminal hydroxyl- or carboxyl groups, is obtainable by starting with a nucleus compound containing at least one hydroxyl group as the nucleus and reacting it with a compound containing at least one anhydride group, after which the resulting first generation acid-terminated addition product is reacted with a compound containing at least one epoxy group; the resulting first generation hydroxyl-terminated addition product thereafter is reacted, in the second generation, with a compound containing at least one anhydride group, after which the resulting second generation acid-terminated addition product, is reacted with a compound containing at least one epoxy group, resulting in a second generation hydroxyl-terminated addition product, and in at least one generation monomers are used that have at least one functional group besides the anhydride group or epoxy group.
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.