摘要:
The present invention relates to a structure made of at least one layer containing a polyamide MXD.10/Z in which: MXD. 10 is the product of condensation of a blend of xylylenediamines containing 70 to 100% of meta-xylylenediamine and of sebacic acid, Z is a repeating unit chosen at least among the repeating units resulting from the polycondensation of a lactam monomer, from an alpha-omega carboxylic aminoacid, the repeating unit X1. Y1 where X1 designates the repeating unit resulting from the polycondensation an aliphatic, arylaliphatic, cycloapiphatic, or aromatic diamine and Yl designates the repeating unit resulting from the polycondensation of a aliphatic carboxylic, cycloaliphatic or aromatic diacid, and the weight ratio Z/(MXD+10+Z) is between 0 and 15%. The structure of the invention can either be made of one layer of this polyamide or either can contain a layer containing the polyamide MXD.10 and at least one layer of another material. The invention also relates to bottles, tanks, containers, pipes, tubes and many types of containment devices made using the previous structure. This structure can also be used into films to produce goods packaging. All these objects have good barrier properties. The invention also relates to these objects as well as the use of these structures and objects.
摘要:
The present invention relates to a microcomposite powder comprising particles from 1 um to 300 um of an electrically conductive product, which are coated with particles from 0.1 &mgr;m to 0.5 &mgr;m of a fluoropolymer. According to one advantageous form of the invention the microcomposite powder comprises a product (A) which is a polymer or an oligomer which can be dissolved with a solvent which is not a solvent for the fluoropolymer or for the electrically conductive product. The present invention also relates to objects consisting of this powder. These objects may be bipolar plates for fuel cells, or supercapacitor components.
摘要:
The invention relates to a bonding agent for PVDF, containing alkyl (alkyl)acrylate units and units bearing a carboxylic acid functional group. This bonding agent, containing PVDF, forms a barrier to hydrocarbons. The invention also relates to the material including the present bonding agent, especially petrol pipes including polyamide and the present bonding agent, in conjunction with PVDF.
摘要:
The invention relates to a polyamide-based thermoplastic composition comprising, by weight: 50 to 98 parts of a polyamide (A1) nondiamine; 0.2 to 40 parts, preferably 0.2 to 9 parts, of a polyamide (A2) diamine, said polyamide (A2) being different from the polyamide (A1) and the ratio by mass (A2)/(A1) being less than 1; 1 to 60 parts, preferably 1 to 30 parts, of a reactive impact modifier (B) or of a blend of modifiers comprising at least one reactive impact modifier (B) or of a blend (B′) comprising at least one impact modifier and at least one reactive modifier. It also relates to an impact modifier composition and to the process for the preparation of a thermoplastic composition according to the invention using such an impact modifier composition.
摘要:
An immiscible polymer system is disclosed, said system itself ecomprising a stable mixture of polymers that are individually miscible with the polymers to be compatibilized. The compositions consisting of this polymer mixture may be obtained by extrusion.
摘要:
The present invention relates to antistatic and adherent compositions based on polyamide, which can be employed especially for the manufacture of composite materials and articles, such as multilayer pipes and/or conduits for conveying and/or storing hydrocarbons. The compositions contain carbon black and are employed for the production of pipes, containers and drums including:an inner layer in contact with the hydrocarbons, based on the said antistatic and adherent composition,a middle layer made of fluoropolymer, preferably of polyvinylidene fluoride, andan outer layer of polyamide,these layers being bonded to each other respectively by layers of adhesive binder. The invention also relates to a process for preparing these items.
摘要:
The invention relates to a method of producing a film comprising at least one layer of a thermoplastic fluoro-polymer and at least one layer of another polymer (A). The inventive method consists in using extrusion blow molding to coextrude a fluoro-polymer and polymer (A) which adhere to one another; with a layer of another thermoplastic polymer (B) such that it forms a layer which is adjacent to the fluoropolymer/polymer (A) layer According to the invention, the thermoplastic polymer (B) is incompatible with the fluoro-polymer and polymer (A) and has adequate extrudate behavior to support the layers of fluoro-polymer and/or polymer (A). Once the coextrudate has been cooled, by separating the layer(s) of (B), at least the film is recovered, said film comprising at least one layer of a polymer selected from among thermoplastic fluoro-polymers and polymers (A).
摘要:
The present invention relates to a transparent amorphous polyamide which results from the condensation of at least one diamine chosen from aromatic, arylaliphatic and cycloaliphatic diamines, of tetradecanedioic acid or of a mixture comprising at least 50 mol % of tetradecanedioic acid and at least one diacid chosen from aliphatic, aromatic and cycloaliphatic dicarboxylic acids. The invention also relates to a composition comprising, by weight, 1 to 100% of the preceding polyamide and 99 to 0% of a semicrystalline polyamide. The invention also relates to the objects composed of the composition of the invention, such as panels, films, sheets, pipes, profiles or objects obtained by injection moulding. The invention also relates to objects covered with a transparent protective layer composed of the composition of the invention.
摘要:
The invention relates to a copolyamide containing at least two patterns (monomers) and of the following general formula A/(Cz diamine)·(Cw diacid) in which: z is the number of carbon atoms of the diamine and w is the number of carbon atoms of the diacid; and A is selected from a pattern obtained from an amino acid and a pattern of the general formula (Cx diamine)·(Cy diacid)y, wherein x is the number of carbon atoms of the diamine and y is the number of carbon atoms of the diacid, the amino acid, each diamine and each diacid being obtained from a renewable raw material according to ASTM D6866 standard. The invention also relates to a composition containing the copolyamide and to the use of this copolyamide and of such a composition, essentially for producing thermofusable glues, in any form thereof.
摘要:
The present invention relates to a composition containing: (a) carbon nanotubes and (b) at least one copolyamide capable of being obtained from at least two different starting products chosen from: (i) the lactames, (ii) the aminocarboxylic acids and (iii) equimolar quantities of diamines and dicarboxylic acids.It also relates to the use of this composition as electrically conductive glue, as well as the use of a dispersion of carbon nanotubes, in such a copolyamide, in order to produce an electrically conductive adhesive composition.