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Acid-resistant coated pigments

A pigment, coating technology, applied in the direction of coating, fibrous filler, etc., can solve problems such as burns

Inactive Publication Date: 2014-10-22
LEY & FARBENWERKE WUNSIEDEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to solve the problem of burns existing in the prior art

Method used

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  • Acid-resistant coated pigments

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0026] 1. Method for producing pigments coated by an acid-resistant method

[0027] Reaction mixture No. 1 consisting of 5 kg of Bayferrox 120 (uncoated ferric oxide) and 0.5 kg of pentaerythritol powder was introduced into a vacuum pressure intensive heating mixer (inhouse construction). The reaction mixture of No. 1 was heated to 250° C. under a pressure of 1 mbar with a centralized mixing box. After a reaction time of 15 minutes, it was ventilated and cooled. The sample taken out is No. 1 paint applied in an acid-resistant way.

[0028] Do the same for the following paints that are applied by acid-resistant means:

[0029] The reaction mixture of No. 2 composed of 2 kg of Bayferrox 420 (uncoated ferric oxyhydroxide) and 0.2 kg of pentaerythritol is used to prepare the pigment coated with acid-resistant method of No. 2;

[0030] The reaction mixture of No. 3 composed of 2 kg of Bayferrox 3950 (uncoated zinc iron spinel with zinc ferrite composition) and 0.2 kg of pentaery...

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Abstract

The invention relates to the use of acid-resistant coated pigments in PVC plastic. Acid-soluble pigments are provided with a coating consisting of an organic compound that melts at a temperature of T>200°C, and as a result the otherwise acid-soluble pigments are still protected from HCl vapour even at PVC processing temperatures of between 180 and 200°C.

Description

technical field [0001] The present invention relates to the use of pigments coated in an acid-resistant manner in PVC, in particular to a PVC synthetic material comprising pigments coated in an acid-resistant manner. Background technique [0002] Iron oxide pigments are widely used as cost-effective red, yellow, brown and black pigments. However, in the processing of thermoplastics such as synthetic material polyvinyl chloride (PVC), the application of iron oxide pigments may only be limited in scope, for example in the production at temperatures of 180°C to 200°C where ferric chloride reacts with iron oxide Hydrogen chloride gas (HCl vapour) produced under certain conditions. Iron oxide in turn catalyzes further degradation of PVC. The result of this further degradation is the so-called burnt morphology. Burns are burnt, brown areas that appear in part on thermoplastically deformed synthetic parts. In this regard, not only iron oxide Fe 2 o 3 (red), FeOOH (yellow), Fe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/04C09C1/24C09D7/62
CPCC09D7/1225C09C1/24C08K9/04C09C1/043C01P2004/62C01P2004/61C09D7/62B29C48/022B29C45/0001B29K2027/06B29K2105/0032
Inventor 迈克·诺恩伯格
Owner LEY & FARBENWERKE WUNSIEDEL
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