Abstract:
The invention relates to a nanocomposite which comprises a polyamide component (A) and a nanoparticulate component (B), wherein nanoparticulate component (B): a) is based on at least one oxide or mixed oxide/ oxide hydrate of one or more metals or half metals M, b) has a mean particle diameter of up to 10 nm, and c) is obtainable in a process comprising sol-gel synthesis that is carried out in the presence of an acid. The invention also relates to methods of making polyamide nanocomposites and to the use of nanoparticulate components to increase the flow of polyamide containing melts. The invention furthermore relates to molded parts made of the nanocomposite and to the use of a nanocomposite to produce thin-walled molded parts.
Abstract:
Thermoplastic moulding compounds comprising A) 10% to 98.95% by weight of at least one thermoplastic polyester, B) 0.05% to 30% by weight of at least one nanoparticulate oxide and/or oxide hydrate of at least one metal or semimetal, having a number-weighted average diameter of the primary particles of 0.5 to 50 nm and a hydrophobic particle surface, C) 1% to 60% by weight of at least one graft polymer, composed of c1) 20% to 80% by weight of a graft base which is composed of a rubber-elastic polymer based on alkyl acrylates having 1 to 8 C atoms in the alkyl radical and/or dienes having a glass transition temperature of below 10°C, c2) 20% to 80% by weight of a graft comprising c21) 60% to 95% by weight of styrene or substituted styrenes of the general formula I in which R is an alkyl radical having 1 to 8 C atoms or a hydrogen atom and R1 is an alkyl radical having 1 to 8 C atoms and n has a value of 1, 2 or 3, and c22) 5% to 40% by weight of at least one unsaturated nitrile, D) 0% - 60% by weight of further additives, the sum of the percentages by weight of components A) to D) making 100%.
Abstract:
The present invention relates to a method for the production of organosols containing at least one oxide and/or oxide hydrate of metals and/or semimetals, comprising the following steps: (a) providing an aqueous solution or dispersion of at least one starting compound containing at least one metal and/or semimetal M1, (b) bringing the aqueous solution or dispersion from step (a) in contact with at least one acidic substance, (c) extracting the aqueous solution or dispersion from step (b) using at least one organic solvent or dispersion medium (L) and (d) raising the pH of the organic phase from step (c) to at least 7. The present invention additionally relates to a method for producing particles from the organosols and to the use of the organosols for producing polymer compositions or polymer coatings.
Abstract:
The invention relates to thermoplastic moulding masses containing: A) 10 to 99 percent by weight of at least one thermoplastic polyamide; B) 0.01 to 30 percent by weight of at least one highly branched or hyper-branched polyether amine; C) 0.5 to 80 percent by weight of a thermally conductive filler; D) 0 to 70 percent by weight of further adjuncts, wherein the sum of the weight percentages of components A) to D) is 100 %.
Abstract:
The invention relates to thermoplastic molding compounds, containing: A) 10 to 99 wt.-% of at least one thermoplastic polyamide, B) 0.01 to 30 wt.-% of at least one highly-branched or hyper-branched polyether amine, C) 0 to 70 wt.-% of further additives, wherein the sum of the weight percentages of said components A) through C) results as 100%.
Abstract:
The invention relates to thermoplastic moulding masses comprising the components A) at least one thermoplastic polyamide, B) at least one hyper-branched polyetheramine, C) at least one amorphic oxide and/or oxide hydrate of at least one metal or semi-metal having a weighted average diameter of the primary particles of 0.5 to 20 nm. The invention also relates to the use of said components B) and C) for improving the flowability and/or thermal stability of polyamides, to the use of moulding masses for producing fibres, films and moulded bodies of all types and to the thus obtained fibres, films and moulded bodies.
Abstract:
processo para produzir misturas de polímero. a invenção se refere a um método de produzir misturas de polímero contendo pelo menos um polímero (a) e pelo menos um componente (b), compreendendo as seguintes etapas: (a) preparar (a) como um grânulo; (b) preparar (b) como uma solução e/ou dispersão líquida em um meio de dispersão; (c) aplicar a solução e/ou dispersão preparada na etapa (b) na forma de gotículas por meio de um atomizador ao granulado (a) preparado na etapa (a); (d) secar o granulado obtido na etapa (c); e (e) opcionalmente realizar uma ou mais etapas de moldagem.