Abstract:
A heat-stabilized polyamide composition comprising from 25 wt% to 90 wt%% of an amide polymer from 0.01 wt% to 10 wt% of a cerium-based heat stabilizer, a second heat stabilizer, a halide additive, and less than 0.3 wt% of a stearate additive. A weight ratio of halide additive to stearate additive is less than 45.0.
Abstract:
A nanofiber nonwoven product is disclosed which comprises a polyamide with a relative viscosity from 2 to 330, spun into nanofibers with an average diameter of less than 1000 nanometers (1 micron). In general, the inventive products are prepared by: (a) providing a polyamide composition, wherein the polyamide has a relative viscosity from 2 to 330; (b) melt spinning the polyamide composition into a plurality of nanofibers having an average fiber diameter of less than 1 micron, followed by (c) forming the nanofibers into the product.
Abstract:
The present invention relates to a low-halogen flame retardant thermoplastic polyamide composition that provides improved mechanical and electrical stability at elevated temperatures, where the thermoplastic composition comprises a polyamide resin; a non-halogen, nitrogen-containing flame retardant; a heat stabilizer containing a copper halide and an organophosphorus compound; an optional lubricant and/or mold release agent; and an optional colorant.
Abstract:
The present invention relates to catalyst compositions containing a mixed oxide catalyst of formula (I) or formula (II) as described herein, their preparation, and their use in a process for ammoxidation of various organic compounds to their corresponding nitriles and to the selective catalytic oxidation of excess NH 3 present in effluent gas streams to N 2 and/or NO x .
Abstract:
A copolyamide composition comprising a statistical copolyamide containing 70-99 wt% of diamine and dicarboxylic acid repeat units and 1-30 wt% of lactam or AA-BB repeat units, whereby incorporation of the comonomer lactam or AA-BB unit reduces the crystallization rate (longer crystallization times) while maintaining (1) high melting point, (2) low potential plate out, (3) low oxygen permeation, (4) high tensile strength and (5) puncture/tear resistance.
Abstract:
A polyamide composition comprising from 45 wt % to 95 wt % of polyamide polymer and from 5 wt % to 55 wt % of a modifier comprising a C18-44 dimer acid or a C18-44 dimer amine or a combination thereof. A number average molecular weight of the polyamide polymer is less than 30,000 g/mol. The polyamide composition has a chemical resistance, as measured by exposure to HCl (10%) for 14 days at 58° C., resulting in a weight loss of less than 3.0 wt %; and a moisture uptake of less than about 2.0 wt % moisture at 95% RH. A process for preparing the polyamide composition is also disclosed.
Abstract:
An adhesive composition comprising a first part comprising an epoxy resin and a second part comprising a multifunctional amine package. The multifunctional amine package comprises bis(hexamethylene)triamine and a synergist. The amine concentration is at least 10% less than the epoxy resin concentration and the adhesive composition demonstrates a sag resistance of greater than 40 mm.
Abstract:
A non-halogenated flame retardant polyamide composition is disclosed which comprises a polyamide, a non-halogenated flame retardant, a PA-6 homopolymer, and at least one heat stabilizer comprising a copper-containing heat stabilizer, an amine-containing heat stabilizer, or a phenol-containing heat stabilizer. The polyamide may have a ratio of carboxylic acid to amine end groups of greater than 1.8:1. The polyamide composition may comprise less than 900 ppm of bromine. Products formed from the composition are also disclosed.
Abstract:
This disclosure relates to a process for making flame retardant fibers comprising the steps of combining a flame retardant masterbatch with a polymer to form a polymer composition and forming the flame retardant fibers from the polymer composition. The masterbatch comprises greater than 10 wt % of a nitrogen compound having a melting point less than 400° C.; and a masterbatch polymer, with the weight percentages based on the total weight of the masterbatch. The flame retardant fibers pass the flame retardancy standards of ASTM D6413 (current year).
Abstract:
A polyamide composition comprising from 15-70 wt % of a first polyamide; from 5-40 wt % of a second polyamide; from 0.01-10 wt % of a stabilizer comprising a lanthanoid-based compound; from 0.01-10 wt % of a first stabilizer comprising a copper-based compound; from 0.01-10 wt % of a second stabilizer comprising a copper-based compound; and from 20-65 wt % filler.