摘要:
The invention relates to a method for producing a homogenous solution of a fluoropolymer, selected from fluoro-homopolymers and fluoro-copolymers and mixtures of various fluoro-homopolymers and/or fluoro-copolymers in a high boiling solvent, whereby (a) the fluoropolymer to be dissolved is dissolved in a mixture of at least two solvents, the first comprising a boiling point of less than 150°C, and/or a vapor pressure of over 5 hPa (at 20°C), and the second being a high boiling solvent comprising a boiling point at least 50 K higher than the first solvent and/or the boiling point thereof being selected so that the solvent mixture comprises a separation factor α of ≥1, and subsequently (b) the first solvent is substantially or completely removed from the mixture. The invention further relates to a method for producing suspensions of inorganic particles of a piezoelectrically and pyroelectrically active or activatable oxide in such fluoropolymer solutions and to the products of said method. The colorless fluoropolymer solutions and opaque white suspensions are suitable for producing laminar piezoelectric and pyroelectric coatings, in particular using doctor blade or screen printing methods.
摘要:
The invention relates to a method for producing an inorganic latent heat storage material that is surrounded by an encapsulating layer that is made of an inorganic-organic polymer material that comprises a metal and/or semi-metal oxygen network with embedded organic groups. The method is characterised in that a liquid or liquefied latent heat storage material, in the form of discrete units that are to be, respectively, encapsulated, is introduced into a liquid or viscous precursor material of the encapsulating material such that the encapsulating material solidifies when coming into contact with the outer surfaces of said latent heat storage material. The invention also relates to an inorganic latent heat storage material that is surrounded by an encapsulating layer and is present in said encapsulation, said encapsulating material being made of an inorganic-organic polymer material that comprises a (semi) metal oxygen network with embedded organic groups, connected, preferably at least partially to (semi) metal. Silane resins are well suited as precursor material.
摘要:
The present invention relates to compositions comprising: (A) a fluorocarbon polymer; and (B) particles of silicon dioxide or a metal oxide bearing fluorocarbon groups on their surface. The compositions may be used in order to reduce friction, for example between moving parts of automobiles.
摘要:
The invention relates to a method for producing an inorganic latent heat storage material that is surrounded by an encapsulating layer that is made of an inorganic-organic polymer material that comprises a metal and/or semi-metal oxygen network with embedded organic groups. The method is characterised in that a liquid or liquefied latent heat storage material, in the form of discrete units that are to be, respectively, encapsulated, is introduced into a liquid or viscous precursor material of the encapsulating material such that the encapsulating material solidifies when coming into contact with the outer surfaces of said latent heat storage material. The invention also relates to an inorganic latent heat storage material that is surrounded by an encapsulating layer and is present in said encapsulation, said encapsulating material being made of an inorganic-organic polymer material that comprises a (semi) metal oxygen network with embedded organic groups, connected, preferably at least partially to (semi) metal. Silane resins are well suited as precursor material.