摘要:
Die vorliegende Anmeldung betrifft eine thermisch expandierbare Zusammensetzung, die mindestens ein peroxidisch vernetzendes Polymer, mindestens ein Peroxid, mindestens ein Polysaccharid und mindestens ein endothermes chemisches Treibmittel umfasst, Formkörper, die diese Zusammensetzung enthalten, sowie ein Verfahren zum Abdichten und Füllen von Hohlräumen in Bauteilen, zum Verstärken oder Versteifen von Bauteilen, insbesondere hohlen Bauteilen, und zum Verkleben von beweglichen Bauteilen unter Verwendung derartiger Formkörper.
摘要:
The present invention relates to a method of preparing a polyrotaxane, said method comprising: performing a radical copolymerization of at least (a) a first polymerizable monomer having a stopper group, and of at least (b) a second polymerizable monomer, wherein said second monomer is complexed by a ring-shaped molecule; wherein during said copolymerization a copolymer threading said ring-shaped molecule is formed, wherein during said copolymerization said first monomer having a stopper group is incorporated into the chain of said copolymer at least partially between the ends thereof, and wherein said stopper groups prevent said ring-shaped molecule from disassembling from the copolymer; and wherein the amount of said first monomer having a stopper group is of from 0.1 mol % to 20 mol % based on 100 mol % of the total amount of polymerizable monomers. The present invention also relates to polyrotaxanes which can be prepared by using such a method. The present invention further relates to cross-linked polyrotaxanes, products which contain polyrotaxanes or cross-linked polyrotaxanes or which can be prepared from polyrotaxanes or cross- linked polyrotaxanes, and the use of polyrotaxanes or cross-linked polyrotaxanes.
摘要:
L'invention concerne une composition élastomère pour insert (1) autoporteur destiné à soutenir un bandage d'une roue d'un véhicule, un insert dont au moins une couche (3) comprend cette composition et un ensemble monté incorporant cet insert. L'invention s'applique à un ensemble monté non pneumatique notamment pour un véhicule à deux roues, dont chacun des bandages est soutenu en permanence par cet insert, La composition élastomère comprend majoritairement en masse un mélange d'au moins un premier élastomère thermoplastique et d'au moins un second élastomère thermoplastique, et cette composition est telle que ledit au moins un premier élastomère thermopiastique est un copolyamide (COPA) et ledit au moins un second élastomère thermoplastique est un élastomère thermoplastique styrénique (TPS).
摘要:
Polymer blend comprising components A, B and C: A: 1 to 19.5% by weight of an elastomeric block copolymer A based on styrene (S-TPE); B: 0.5 to 8% by weight of a compatibilizer component B; and C: 80 to 98.5 % by weight of at least one semi-crystalline olefin homo- or copolymer C. The invention further relates to a composition comprising thermoplastic elastomers based on styrene (S-TPE)for use as compatibilizer of S-TPE block copolymers and polyolefins, a process for the preparation of the polymer blend, a master batch for the preparation of the polymer blend, and single- and multilayer films comprising said polymer blend and their use for food packaging and as shrink hood.
摘要:
Gegenstand der vorliegenden Anmeldung sind thermisch expandierbare Zubereitungen, enthaltend (a) mindestens ein peroxidisch vernetzbares Polymer, (b) mindestens eine niedermolekulares multifunktionelles Acrylat, (c) mindestens ein Peroxid sowie (d) mindestens zwei voneinander verschiedene chemische Treibmittel, wobei das Massenverhältnis des mindestens einen Peroxids zu dem mindestens einem niedermolekularen multifunktionellen Acrylat mindestens 1:3 beträgt.
摘要:
Brominated styrene-butadiene copolymers are recovered from solutions in a halogenated solvent by an anti-solvent precipitation process. The precipitation process is performed by adding the anti-solvent to the brominated styrene-butadiene copolymer solution. By performing the precipitation using this specific order of addition, a denser product is obtained that is easier to dry. The recovered product shows a reduced tendency to act as a nucleating agent when it is used as a flame retardant additive in an extrusion foaming process.
摘要:
Methods of sterilizing articles such as wound dressings, include the steps of providing an article that includes a polymer layer, applying an aqueous solution to the polymer layer and applying electron beam radiation to the article. The polymer layer includes a hydrophobic organic matrix that includes an elastomeric polymer and hydrophilic polymeric microparticles dispersed within the elastomeric polymer. Applying the aqueous solution to the polymer layer at least partially swells the hydrophilic microparticles of the polymer layer. In some articles the polymer layer includes an elastomeric polymer, hydrophilic polymeric microparticles dispersed within the elastomeric polymer, and hydrophilic polymer particles with greater than 10 micrometers average particle size dispersed within the hydrophobic organic matrix. These articles may be sterilized by applying either electron beam or gamma radiation.