摘要:
A circular tire frame includes a resinous material including a polyamide-based thermoplastic elastomer. The polyamide-based thermoplastic elastomer is a copolymer formed by polymerization of at least a polymer (HS) forming a hard segment and a polymer (3SS) forming a soft segment and having three or more functional groups.
摘要:
The present invention relates to a process for preparing glucaric acid or lactone thereof, the process comprising: reacting glucose with oxygen in the presence of a heterogeneous oxidation catalyst comprising a metal selected from the group consisting of Pd, Pt, and a combination thereof to convert at least a portion of the glucose to glucaric acid or lactone thereof, wherein the pH of the reaction mixture is less than 7 and the reaction is conducted in the substantial absence of added base, and wherein at least about 50% of the glucose is converted to glucaric acid or lactone thereof.
摘要:
This disclosure relates to a polymer film including: a base film including polyamide-based resin including two or more different kinds of repeat units; and a copolymer including polyamide-based segments and polyether-based segments.
摘要:
Provided are methods for preparing polymer compositions by combining a polyamine/ammonium salt component, a polyamide component, and, optionally, a transamidation catalyst, as well as polymer compositions prepared according to the described methods.
摘要:
This invention relates to a biaxially stretched product comprising a copolyamide comprising monomeric units of: aliphatic non-cyclic diamines X and aliphatic non-cyclic dicarboxylic acids Y or aliphatic non-cyclic α,ω-amino acids Z, and diamines M and diacids N in an amount between 0.1 to 2 wt % based on the total amount of copolyamide, and in which M and N are cyclic, and wherein the product has been stretched at a temperature of between the glass transition temperature (Tg) and the melting temperature (Tm). A method of preparation is claimed, as well as a multilayer film comprising the biaxially stretched product.
摘要:
There is described a new random three-component copolyamide which has an improved set of physical and mechanical features, which make it particularly suitable for the production of barrier layers (possibly in multilayer coupled with films of different polymers) or lines having high toughness and transparency, which are used for example for the production of fishing lines.
摘要:
The invention relates to a composition for a thermoplastic composite material, comprising: 30 to 60 vol.-%, preferably 35 to 50 vol.-%, thermoplastic matrix comprising 50 to 100 wt.-% semi-crystalline polyamide polymer and 0 to 50 wt.-% of at least one additive and/or at least one other polymer; and 40 to 70 vol.-%, preferably 50 to 65 vol.-%, long reinforcing fibres (or long fibre reinforcement), said thermoplastic matrix impregnating the long reinforcing fibres (or long fibre reinforcement), said semi-crystalline polyamide polymer being: (a) a reactive composition comprising or consisting of at least one reactive polyamide prepolymer precursor of the semi-crystalline polyamide polymer, or, as an alternative to (a), (b) a non-reactive composition of at least one polyamide polymer, said composition being that of the thermoplastic matrix defined above, and said reactive polyamide prepolymer of composition (a) and said polyamide polymer of composition (b) comprising or consisting of at least one BACT/XT copolyamide.
摘要:
The polyamide resin of the present invention is a polyamide resin containing an amine group and a carboxyl group, wherein the amine group concentration is about 200 to 300 µeq/g and two to six times as high as the carboxyl group concentration. The polyamide resin has excellent long-thermal stability.