摘要:
A transparent polyamide which is the polycondensation product of bis-(4-aminocyclohexyl)-methane and a mixture of azelaic acid and at least one acid selected from group consisting of isophthalic acid and adipic acid. Up to 30 mol % of said bis-(4-aminocyclohexyl)-methane may also be replaced with hexamethylene diamine or another C.sub.8 -C.sub.15 cycloaliphatic diamine. Said transparent polyamide is useful for the production of sheets, films, plates, tubes, rods and containers of various types by extruding or molding.
摘要:
Thermoplastic, easily flowing hydrophobic polyamides obtained by incorporation of from 2 to 15% by weight, based on polyamide, of at least one monoepoxide compound corresponding to the following general formula ##STR1## in which R is a hydrocarbon radical containing at least 4 carbon atoms.
摘要:
Polymer blends with improved impact strength consisting essentially of a polyamide and a copolymer of an .alpha.-olefine, an amide and an ester of an .alpha.,.beta.unsaturated carboxylic acid.
摘要:
Copolyamides with improved properties are obtained by polycondensing aliphatic and/or aromatic dicarboxylic acids with an amine mixture of diaminodicyclohexyl methanes and optionally homologous polycyclohexyl polyamines and one or more aliphatic diamines, said copolyamide being useful for the production of shaped articles such as films, sheets and injection moldings.
摘要:
This invention relates to the process of applying heat curable reaction resin mixtures of polyisocyanates (a), polyepoxides (b), reaction inhibitors (c), heat activated reaction catalysts (d) and optionally auxiliary agents and additives (e) for the production of multilayered moulded products based on polyamides with a cured duromer layer by applying the mixture and heat curing of the reaction resin mixtures are preferably applied to the polyamide moulded products produced by the anionic lactam polymerization process by rotation, extrusion or centrifugal casting while the said polyamide products are still hot from the heat of polymerization, e.g. to form internal coatings on rotation cast polyamide pipes. The invention further relates to duromer coated multilayered moulded products produced by the above process.
摘要:
The present invention relates to a process for the preparation of aromatic polycarbonates, aromatic polyester carbonates and aromatic polyesters by the known two phase interface process, which is characterized in that the organic phase used is a mixture of aromatic hydrocarbons with alkanes and/or cycloalkanes.
摘要:
In a therapeutic system such as a plaster for administration of an active compound through the skin and comprising a covering layer which is essentially impermeable to the active compound, an active compound reservoir layer and a protective layer which can be pulled off and which is essentially impermeable to the active compound, the improvement wherein the reservoir layer contain about 1-30% of active compound in an elastomer mixture comprising a predominantly amorphous olefinic (co)polymer with a glass transition temperature of
摘要:
Thermoplastical processible polyamides are rendered hydrophobic by addition of particular aromatic amines, optionally in combination with selected phenolic compounds.
摘要:
Transparent copolyamides obtained by polycondensing a lactam or a corresponding amino acid, an aliphatic and/or aromatic dicarboxylic acid and a mixture of hydrogenated condensation products of aniline and formaldehyde.
摘要:
Thermoplastically polyamide moulding compositions produced from at least 70% by weight of polyamide, a long-chain polyester, polyether or hydrocarbon polyol and at most 5% by weight of a polyanhydride or polyepoxide.