Abstract:
The present invention relates to a melamine-formaldehyde foam comprising microspheres having a core comprising at least one active and/or effective substance selected from the group consisting of inorganic compounds, latent heat accumulators, flame retardants, surfactants, detergents, dyes, fragrances, biocidally acting substances, intumescents, hydrophobicizing agents, adhesives, substances influencing haptics or the soil release behavior, formaldehyde scavenger, substances improving indoor air quality, skin care products and formulations, abrasives and mixtures thereof and having a shell comprising at least one melamine-formaldehyde resin, a process for their preparation and to the use thereof.
Abstract:
Melamine/formaldehyde foams which contain 0.01 to 45% by weight of a particulate filler having a median particle diameter in the range from 5 µm to 3 mm, wherein the % by weight is based on the total weight of the melamine/formaldehyde precondensate and filler used for the foam production.
Abstract:
The invention relates to zinc salts of C4-8-alkane dicarboxylic acids, which can be obtained by reacting C4-8-alkane dicarboxylic acids with surface-modified zinc oxide particles, wherein the surface-modified zinc oxide particles can be obtained by treating zinc oxide particles with organosilanes, silazanes and/or polysiloxanes and subsequently heat treating and/or UV irradiating the treated zinc oxide particles, and to the use thereof as polymerization catalysts for producing polyalkylene carbonates.
Abstract:
A composite foam containing A) foamed particles containing A1) 25 to 95% by weight styrene polymer(s), A2) optionally a blowing agent, A3) optionally one or more additives, B) an aminoplast component containing B1) 1 to 65% by weight cured, optionally modified, and optionally foamed aminoplast resin, B2) 0.1 to 20% by weight of one or more flame retardant organic phosphorous compounds having a phosphorous content of 5 to 80% by weight (based on the respective compound) and/or expanded graphite, B3) optionally one or more flame retardant synergists or the component B2), B4) optionally a blowing agent, B5) optionally one or more additives, wherein the percentages by weight - where not stated otherwise - relate to the sum of the components A1), B1) and B2), is suitable, in particular, as insulating material.
Abstract:
Espumas de melamina/formaldehído con estructura de espuma de celda abierta, la cual contiene una gran cantidad de puentes ramificados tridimensionales, enlazados entre sí, y en las cuales, en la estructura de poros, están incrustados materiales de carga en forma de partículas, caracterizadas porque éstas contienen 0,01 a 45 % en peso de un material de carga en forma de partículas con un diámetro medio de partícula en el intervalo de 5 μm a 3 mm y en calidad de material de carga en forma de partículas se utilizan sustancias inorgánicas, en cuyo caso el % en peso se refiere al peso total del precondensado de melamina/formaldehído empleado para la preparación de espuma y del material de carga.
Abstract:
The present invention relates to a biodegradable polymer mixture comprising i) 40 to 95 wt.-% based on the total weight of components i to ii, at least one polyester based on aliphatic or aliphatic-aromatic dicarboxylic acids and aliphatic dihydroxy compound; ii) 5 to 60 wt.-% based on the total weight of components i to ii, polyalkylene carbonate, in particular polypropylene carbonate; iii) 0 to 60 wt.-% based on the total weight of components i to iii, at least one biodegradable homo- or copolyester selected from the group consisting of polylactic acid, polycaprolactone, polyhydroxyalkanoates and an inorganic or organic filler; iv) 0 to 10 wt.-% based on the total weight of components i to ii of a styrene, acrylic acid ester and/or methacrylic acid ester based copolymer containing an epoxide group and v) 0 to 15 wt.-% of an additive selected from the group consisting of lubricants, antiblocking agents, antistatic agents, UV absorbers, UV stabilizers, thermal stabilizers, dyes, pigments, softeners, fertilizers and pesticides ingredients. The present invention further relates to a method for producing biodegradable polymer mixtures, to the use of biodegradable polymer mixtures for the production of molded parts, films or fibers as well as molded parts, and to films or fibers comprising biodegradable polymer mixtures.
Abstract:
Preparing acrylonitrile-butadiene styrene-copolymer containing (A) graft copolymer comprising (A1) graft substructure, which contains (A11) butadiene, (A12) styrene and (A13) agglomerizing agent, (A2) graft shell containing (A21) styrene and (A22) acrylonitrile, and (B) thermoplastic copolymer containing (B1) acrylonitrile and (B2) styrene, comprises adding seed latex; radical emulsion polymerization of the component (A11) and optionally (A12); radical or redox initiator emulsion polymerization of components (A21) and (A22); and mixing (A) with thermoplastic copolymer (B). Preparation of acrylonitrile-butadiene styrene-copolymer containing (A) 10-60 wt.% of a graft copolymer comprising (A1) 55-70 wt.% of graft substructure, which contains (A11) 85-100 wt.% of butadiene, (A12) 0-10 wt.% of styrene and (A13) 0-5 wt.% of an agglomerizing agent, (A2) 30-45 wt.% of graft shell containing (A21) 70-90 wt.% of styrene and (A22) 10-30 wt.% of acrylonitrile, and (B) 40-90 wt.% of a thermoplastic copolymer containing (B1) 15-35 wt.% of acrylonitrile and (B2) 65-85 wt.% of styrene, comprises adding a seed latex; radical emulsion polymerization of the component (A11) and optionally (A12), in the presence of the seed latex; radical or redox initiated emulsion polymerization of the components (A21) and (A22) in the presence of the formed (A1); and mixing (A) with a thermoplastic copolymer (B) produced in a separate way, where: the seed latex exhibits an average particle diameter of less than 10 nm, determined by analytical ultracentrifuge corresponding to the method according to W. Scholtan and H. Lange, Colloid.-Periodical and Z.-Polymer 250 (1972), pages 782-796; and instead of the described turbidity optics, an interference optic is used in the process. Independent claims are included for: (1) the acrylonitrile-butadiene styrene-copolymer obtained by the above method; (2) the preparation of a rubber elastic polymer particulate comprising polymerization the rubber elastic polymer particulate forming monomer in the presence of the seed latex; and (3) the rubber elastic polymer particulate obtained by the above process.
Abstract:
Espuma de resina de melamina que contiene partículas, caracterizada porque las partículas son nanoporosas y preferiblemente granulares, en la que la espuma exhibe un tamaño de poro de 10 a 1000 μm, las partículas nanoporosas exhiben un tamaño de partícula (valor D50) de 0,1 a 100 /mu;m, en particular de 1 a 30 μm, y la densidad de la espuma que contiene partículas está en el intervalo de 20 a 70 g/l.