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Polyamide-based products

A polyamide and product technology, applied in the field of polyamide-based products, can solve the problems of unsuitable impact modifiers, high energy content of impact modifiers, adverse effects of flame retardancy, etc.

Pending Publication Date: 2021-12-07
LANXESS DEUTDCHLAND GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Consequently, impact modifiers that should typically be used in polyamides are not suitable for use in polyamide-based products with the above-mentioned requirements for a clear and constant color marking under the influence of external influences
Another issue is that impact modifiers often have an adverse effect on flame retardancy due to their high energy content

Method used

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Examples

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example

[0426] In order to demonstrate the improvement of the properties described according to the invention, corresponding polyamide-based polymer compositions were first prepared by compounding. For this purpose, the individual components were mixed in a twin-screw extruder (ZSK 26 mixer from Coperion Werner & Pfleiderer (Stuttgart, Germany)) at a temperature between 250°C and 280°C, discharged in a strand, cooled until granulated and granulated. After drying (typically at 80°C for two days in a vacuum drying chamber), the The pellets were processed at temperatures ranging from 250°C to 270°C to give standard specimens for the corresponding tests.

[0427] The impact resistance according to ISO 180-1 U (Izod) was determined on injection-molded test specimens in the mold-dry state at 23° C. and −30° C. as defined according to DIN EN ISO 1874-2. The molded dry state is defined in DIN EN ISO 1874-2.

[0428] The Lab color space (also called: CIELAB, CIEL*a*b*, Lab color) describes a...

example 1

[0444] The inventive combination of components a), b), c) and d) in Example 1 (ΔE<10), compared to Comparative Example 1 lacking components b) and c), not only shows hot air aging Thereafter improved color retention and improved color stability, but also surprisingly also shows an improvement in impact resistance measured according to ISO 180-1U at 23°C. The improvement of impact resistance relative to the prior art by means of conventional impact modifiers in Comparative Example 2 likewise showed high impact resistance, but resulted in a more pronounced discoloration after hot air aging and failed to achieve UL94 V-0 rating.

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Abstract

The present invention provides polyamide-based products. The invention relates to a flame-retardant, color-stable and impact-resistant polyamide-based product, and the use of a mixture comprising at least one aromatic secondary amine and at least one phosphinic acid derivative as an additive for improving the aging characteristics in the form of improved color retention or improved color stability compared to polyamide-based products lacking flame retardancy of said mixture.

Description

technical field [0001] The present invention relates to flame-retardant, color-stable and impact-resistant polyamide-based products and mixtures comprising at least one aromatic secondary amine and at least one phosphinic acid derivative as additives for improving and lacking the resistance of said mixtures. The use of aging characteristics in the form of improved color retention or improved color stability compared to flammable polyamide-based products. Background technique [0002] Polyamides are important thermoplastic materials, especially in the field of electrical and electronic components, due to their good mechanical stability, their chemical resistance and good processability. In particular, however, applications in the electrical and electronics industry very frequently place high demands on flame retardancy, for which reason the polyamides used there must frequently be modified with flame retardants. Recently, halogenated flame retardants which can be used for th...

Claims

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Application Information

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IPC IPC(8): C08L77/00C08L77/02C08L77/06C08K5/18C08K3/32C08K5/3492
CPCC08K5/18C08K3/32C08K5/34924C08L2201/02C08L77/02C08L77/06C08K5/5313
Inventor 伊丽莎白·戈约亨·恩特尔德特勒夫·约阿希米马蒂亚斯·比恩米勒莱夫·科尔特
Owner LANXESS DEUTDCHLAND GMBH
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