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Polyamide composition which is dyed in black, production and use thereof

A polyamide composition, the technology of the composition, applied in the direction of complex metal compounds, organic dyes, azo dyes, etc. of azo dyes, can solve the details, health hazards, black is not provided with surface quality and flow properties of composite materials particularly strong issues

Active Publication Date: 2019-09-13
BASF AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, carbon black-pigmented polyamides generally have the disadvantage that their surface is rough and their black color is not particularly strong, and their flow behavior during processing in the injection molding method is not particularly good
[0016] However, nigrosine is not completely free from problems related to possible health hazards: for example, residues of aniline and nitrobenzene from the Risk of undesired decomposition products from the process or spinning process
However, the description in this document only deals with various coloring inscriptions without providing details of the surface quality and flow properties of the composite

Method used

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  • Polyamide composition which is dyed in black, production and use thereof
  • Polyamide composition which is dyed in black, production and use thereof
  • Polyamide composition which is dyed in black, production and use thereof

Examples

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preparation example Construction

[0158] The preparation of the polyamide molding compositions is effected by methods known per se. This involves mixing the components in proper weight ratios. The components are preferably mixed at elevated temperature by combining, mixing, kneading, extrusion or rolling. The mixing temperature is preferably from 220°C to 340°C, especially from 240 to 320°C, especially from 250 to 300°C. Suitable methods are known to those skilled in the art.

[0159] moldings

[0160] Furthermore, the invention provides moldings produced using copolyamides and corresponding polyamide molding compositions according to the invention.

[0161] The black polyamides can be used to prepare moldings by any desired suitable processing method. Suitable processing methods are in particular injection moulding, extrusion, coextrusion, thermoforming and any other known plastic forming methods. These and other examples can be found in, for example, " von Kunststoffen” [Coloration of plastics], VDI-V...

Embodiment

[0173] Use the following raw materials:

[0174] Nylon-6,6: A27, purchased from BASF SE, melting point: 264 ° C, viscosity value (0.5% in 96% H 2 SO 4 Medium): 150cm 3 / g

[0175] Nylon-6: B27, purchased from BASF SE, melting point: 222°C, viscosity value (0.5% in 96%H 2 SO 4 Medium): 150cm 3 / g

[0176] Glass fiber: 3B-DS1125, manufacturer: 3B-FIBREGLASS S.P.R.L., average diameter: 10.5μm, length: 4mm

[0177] Glass fiber: NEG-T249H, manufacturer: NIPPON ELECTRIC GLASS (MALAYSIA) SDN.BHD., average diameter: 10.5μm, length: 3mm

[0178] Aniline Black / Solvent Black 7: Manufacturer: COLLLOIDS LTD.

[0179] Solvent Black 28: Oracet BK 045, manufacturer: BASF SE

[0180] Carbon black (extra black 4): Manufacturer: Orion Engineered Carbons GmbH

[0181] Heat stabilizer: CuI / KI, molar ratio 1:4

[0182] Lubricant: EBS, manufacturer: Lonza Cologne GmbH

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Abstract

The present invention relates to a polyamide composition which is dyed in black, comprising a chromium-containing azo dye in the form of a chromium complex and carbon black and glass fibres, to the production of such a polyamide composition and to the use thereof for producing polyamide moulded bodies which are laser-writable and dyed in black.

Description

[0001] Background of the invention [0002] The present invention relates to black polyamide compositions comprising chromium-containing azo dyes in the form of chromium complexes and carbon black and glass fibres, to a process for the preparation of such polyamide compositions and to their use in the preparation of black lasers Use of polyamide moldings for engraving. [0003] current technology [0004] Polyamides are polymers produced on a large scale worldwide, not only for the main fields of application of foils, fibers and moldings (processing materials), but also for various other purposes. The most widely produced polyamides are nylon-6 (polycaprolactam) and nylon 6,6 (nylon, polyhexamethylene adipamide). Most industrially important polyamides are semicrystalline or amorphous thermoplastic polymers with high heat resistance. The temperatures used for coloring and any necessary further processing of these polyamides are high: usually above 240°C, sometimes above 300°C....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02
CPCC08L77/02C08L77/06C08K3/04C08K7/14C08K5/0091C08L77/00C08K5/0041C08K5/23C08K3/014C08L2201/08C08L2205/02C08J3/203C08L2205/06C09B17/02C09B45/16
Inventor J·克勒梅S·瓦格纳
Owner BASF AG
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