摘要:
Preparation for passivating metallic surfaces, comprising at least one itaconic acid homopolymer or copolymer (A), water and/or another solvent suitable for dissolving, dispersing, suspending or emulsifying the homopolymer or copolymer (A), as component (B); at least one organic Ti or Zr compound (C); and optionally at least one Zn or Mg salt (D). Process for producing a passivating layer on a metal surface by treating the metal surface with such a preparation. Passivating layer on a metallic surface, obtainable by such a process. Metallic surface comprising such a passivating layer. Use of inventive preparations for passivating a metal surface.
摘要:
A method for passivating metallic surfaces, more particularly those of strip metals, by treating the surface in alternating layers with a) an acidic, aqueous preparation comprising at least one water-soluble copolymer (A) containing acid groups and b) an aqueous preparation comprising at least one water-soluble and/or water-dispersible species (B) which contains cationic and/or procationic groups, preferably a cationic and/or procationic polymer (B1), the preparation a) always being the first and the last layer.
摘要:
The present invention relates to an aqueous preparation for passivating metallic surfaces, comprising itaconic acid homopolymers or copolymers and at least one amine- or amide-containing alcohol, to a method for passivating metallic surfaces by treating the surface with the preparation of the invention, to passivating layers and metallic surfaces obtainable by means of the method of the invention, and to the use of the preparation of the invention for passivating a metal surface.
摘要:
The present invention relates to a method for passivating metallic surfaces, wherein the metal surface is contacted with an aqueous composition comprising at least one water-soluble polymer (X) comprising acidic groups and with at least one polyamine (P), the pH of the composition being in the range from 0.5 to 2.
摘要:
A blow molding having capacity of at least 250 ml, having a shell which is composed of impact-resistant polystyrene and which is produced via injection stretch blow molding where an average aspect ratio of rubber particles derived from longitudinal section and an average aspect ratio of rubber particles derived from cross section measured in transmission electron micrographs is greater than 4 respectively, and a biaxial orientation of the rubber particles, given by the ratio of the aspect ratio derived from cross section to the aspect ratio derived from longitudinal section is smaller than 3.
摘要:
Process for the production of moldings from nanoporous polymer materials, comprising the stages of a) preparation of a multiphase polymer mixture with domains in the range from 5 to 200 nm, b) impregnation of the polymer mixture with a blowing agent, where the solubility of the blowing agent in the phase forming the domains is at least twice as high as in the adjacent phases, c) expansion of the multiphase polymer mixture comprising blowing agent, by introducing the polymer mixture into a cavity and expanding it therein, thus obtaining the molding.
摘要:
Process for the production of moldings from nanoporous polymer materials, comprising the stages of a) preparation of a multiphase polymer mixture with domains in the range from 5 to 200 nm, b) impregnation of the polymer mixture with a blowing agent, where the solubility of the blowing agent in the phase forming the domains is at least twice as high as in the adjacent phases, c) expansion of the multiphase polymer mixture comprising blowing agent, by introducing the polymer mixture into a cavity and expanding it therein, thus obtaining the molding.
摘要:
Process for preparing homopolymers of α-methylstyrene, or copolymers of α-methylstyrene and comonomers, by anionic polymerization in the presence of an initiator composition, which comprises using an initiator composition in which potassium hydride and at least one organylaluminum compound are present.
摘要:
The invention relates to an anionically polymerised, impact-resistant polystyrene with a dispersed plasticiser phase, comprising particles with capsule particle morphology and method for production thereof.
摘要:
In a process for the anionic polymerization of vinylaromatic monomers or dienes in the presence of a lithium organyl or lithium alcoholate and a magnesium and/or an aluminum compound, a sterically hindered phenol or amine is added.