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Method and system for coloring plastic molding materials

A molding composition, a technology for plastic molds, applied in the field of systems implementing the method, can solve problems such as production loss, and achieve the effects of low cost, high reproducibility, and excellent mechanical properties

Active Publication Date: 2015-07-22
ROHM G M B H
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Another factor that must be considered in addition to dismantling costs is therefore the loss of production

Method used

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  • Method and system for coloring plastic molding materials
  • Method and system for coloring plastic molding materials
  • Method and system for coloring plastic molding materials

Examples

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Embodiment 1

[0142] in accordance with figure 1 In a system of ®, 216 t of polymer mixture comprising 108 t of PMMA polymer and unreacted monomer was introduced into a single screw extruder over a period of 6 days. The first three exhaust sections operate at atmospheric pressure and the fourth at 200 mbar (absolute). The monomer obtained from the exhaust section is condensed and used for the preparation of polymethylmethacrylate.

[0143] The injection valve used was a Phoenix company type 230DN2, PN 400 injection valve with bellows. The pressure inside the extruder at the feed point approximately corresponds to atmospheric pressure, with a temperature of approximately 260°C. The quantity of molding composition flowing through the feed point was 750 kg / hour. 535 g / h of aqueous liquid color was introduced at the feed point using a pressure of 20 bar. The aqueous liquid color used was a composition comprising 20% ​​by weight polyacrylate as a dispersant (commercially available from Ciba ...

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Abstract

The present invention relates to a process for producing coloured plastics moulding compositions with aqueous liquid colours, where an aqueous liquid colour is added to a molten plastics moulding composition. The present invention also describes a system for conducting the said process.

Description

technical field [0001] The invention relates to a process for the preparation of pigmented plastic molding compositions. The invention also describes a system for implementing the method. Background technique [0002] Plastic molding compositions have been colored with colorants since a long time. Various methods are commonly used for this purpose, each with different advantages and disadvantages. [0003] For example, solid colorants can be added to the plastic to be colored. However, the disadvantage here is that it is only very difficult to disperse the pigments homogeneously in the plastic, unless the plastic is subjected to long-term compounding, which can lead to degradation of the polymer and its associated mechanical properties of degradation. [0004] For this reason, precolored plastics, so-called masterbatches, which contain the colorants to be used, especially pigments, in concentrated form are usually used. However, the carrier plastic to be used may cause ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B7/38B29B7/94B29B7/84B29C48/29B29C48/395B29C48/40B29C48/57B29C48/92
CPCB29C47/1063B29B7/94B29C47/1081B29B7/38B29C2947/92514B29C47/92B29C47/6056B29C2947/92866B29C2947/92466B29C2947/92209B29C2947/92895B29C2947/92104B29C2947/92961B29C47/385B29C2947/92704B29C2947/926B29C2947/924B29C2947/92019B29C2947/92333B29B7/845B29C47/1009B29B7/72B29C48/29B29C48/57B29C48/92B29C48/286B29C48/297B29C48/397B29C2948/924B29C2948/926B29C2948/92019B29C2948/92104B29C2948/92209B29C2948/92333B29C2948/92466B29C2948/92514B29C2948/92704B29C2948/92828B29C2948/92866B29C2948/92895B29C2948/92961B29C48/40B29B7/847
Inventor A·克鲁格S·贝克特T·戈达科克T·维克M·诸塞斯U·高彻特K·施乌特斯
Owner ROHM G M B H
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