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Electrostatic Composition Based On A Polyamide Matrix

Inactive Publication Date: 2007-08-30
RHODIA ENG PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0001] The present invention relates to a composition based on a polyamide matrix comprising electrically conductive fillers and antistatic agents. The forming of this composition makes it possible to obtain plastic articles, such as, for example, bodywork components in the motor vehicle field, having a good ability to be painted by a process for the electrostatic deposition of the paint.

Problems solved by technology

However, plastic components present problems when it is desired to paint them.
When processes for painting by electrostatic deposition are used, poor adhesion of the paint to conventional plastic components is obtained.
However, the incorporation of these fillers has a negative effect on some properties of the plastics, such as the mechanical properties.
Furthermore, the incorporation of conductive fillers significantly increases the melt viscosity of the thermoplastic matrices, rendering them unsuitable for use in certain processes for the forming of these matrices.

Method used

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  • Electrostatic Composition Based On A Polyamide Matrix
  • Electrostatic Composition Based On A Polyamide Matrix
  • Electrostatic Composition Based On A Polyamide Matrix

Examples

Experimental program
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Effect test

example 2

Preparation of Compositions

[0098] Polyamide-based compositions are manufactured by blending various compounds mentioned below via a twin-screw extruder. The compositions, the compounds used and their amounts are given in table 2:

TABLE 2Formulations34PA 6,6 (%)46.9543.95Elastomer (%)77Wollastonite (%)2626Others (%)2.052.05Polyetheramide (%)1110Masterblend MB (%)711Adhesion of the paint++Surface resistivity (Ω)45 × 1093 × 109MFI (g / 10 min)23.518.7Notched Charpy impact (kJ / m2)9.28Elongation at break (%)12.810.8Tensile modulus (N / mm2)27302570HDT (° C.)206206

[0099] The percentages of the various components are expressed by weight, with respect to the total weight of the composition.

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Abstract

The invention relates to a composition based on a polyamide matrix comprising electrically conductive charges and antistatic agents. This composition makes it possible to obtain plastic articles, for example, body parts used in the automobile industry that are well-suited for painting by means of an electrostatic paint deposition process.

Description

[0001] The present invention relates to a composition based on a polyamide matrix comprising electrically conductive fillers and antistatic agents. The forming of this composition makes it possible to obtain plastic articles, such as, for example, bodywork components in the motor vehicle field, having a good ability to be painted by a process for the electrostatic deposition of the paint. PRIOR ART [0002] There exists a high demand in numerous industries for components made of polyamide materials. This is because these components are light and can be conceived and designed more easily than components made of steel or aluminum, in particular in the field of the motor vehicle industry. [0003] However, plastic components present problems when it is desired to paint them. [0004] Thus, for example, in the field of motor vehicles, there exist in particular three main methods for painting electrostatically, that is to say by movement of the particles under the influence of an electric curr...

Claims

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Application Information

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IPC IPC(8): C08K3/08C08K3/04B60R13/08C08L77/00C08L77/02C08L77/06C09D5/46C09D177/00C09D177/02C09D177/06
CPCB60R13/08C08K3/04C08L77/00C08L77/02C08L77/06C08L2666/20C08L2666/04C08K3/017C08K2201/001
Inventor BRADLEY, GERARDPEDUTO, NICOLANGELO
Owner RHODIA ENG PLASTICS
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