Neste Oy

Berggren Oy Ab

Jukka Laakso

Toivo Karna

Esko Savolainen

Olli Ikkala

Esa Virtanen

Heikki Ruohonen

Hannele Jarvinen

Jan-Erik Osterholm

Kalle M Levon

Timo Niemi

Helge Lindstrom

Jan-Erik Sterholm

Pirjo Mononen

Pauli Kirmanen

Sari Karjalainen

Torvald Vestberg

Alejandro Andreatta

Ismo Lehtiniemi

Henrik Stubb

Kimmo Vakiparta

Per Nyholm

Timo Kokkonen

Irma Auvinen

Eija Silvasti

Toivo K Arn A

Hannele J Arvinen

Kimmo V Akiparta

An electrically conducting plastic material is produced by blending a polyaniline or a derivative thereof with an organic sulfonic acid or a derivative thereof. A reaction product or blend of a polyaniline or a derivative thereon with an organic sulfonic acid or a derivative thereof can be brought to an easy-to-handle or directly melt-processable form through a heat-treatment process carried out at approx. +40.degree. to +250.degree. C. The obtained plastic material is advantageously further improved by blending the heat-treated reaction product or blend with a thermoplastic polymer and then melt-processing the mixed blend. The properties of the resulting compound material exhibit complete compatibility of the heat-treated reaction product or blend with the thermoplastic polymer.

Conducting polymer material and method for its production

The present invention relates to electrically conducting thermoset compositions and methods for preparing them. In the compositions according to the invention, the conducting component is a polyaniline protonated with a protonic acid containing at least one hydroxyl group. The thermoset matrix can be, for instance, a phenol-formaldehyde resin, a melamine-formaldehyde resin, or a polyester resin.

Electrically conducting thermoset polymer compositions with hydroxy

The invention relates to a conductive polymer complex which contains a polyaniline or derivative thereof doped with a protonic acid. By the method according to the invention, a conductive polymer is obtained having substantially reduced acidity, sufficiently high conductivity level, and which is suitable, for example, for being melt processed in conventional plastics processing apparatus. The acidity of the conductive polymer can be reduced by having the conductive polymer contain both a metal compound and an additionally neutralizing compound. The obtained conductive polymer material, having a pH value of approximately 3-8, can be mixed with an insulating polymer to produce a conductive plastics mixture. The invention also relates to a method of preparing a conductive polymer that is more processable by incorporating therein a plasticizing agent selected from the group consisting of water, a C.sub.1 -C.sub.3 alcohol, and mixtures thereof.

Conductive plastics material and a method for its preparation

Compositions and methods are described that relate to the use of reaction products of metal compounds and protonic acids for plasticizing and neutralizing acidic, protonated compositions comprising substituted and unsubstituted polyanilines and co-polymers and or mixtures thereof; and for reducing the percolation threshold for conductivity in blends with insulating bulk polymers.

Metal compound/protonic acid containing electrically conductive

A method for preparing a polyaniline having a desired molar mass. Control of the molar mass of the polyaniline is achieved in connection with an aniline polymerization reaction, by feeding aniline and an oxidizing agent participating in the polymerization reaction gradually into a polymerization vessel. By varying the feeding speeds of the aniline and the oxidizing agent, polyanilines having different molar masses are obtained.

Method for preparing polyaniline

An electrically conducting plastic material is produced by blending a polyaniline or a derivative thereof with an organic sulfonic acid or a derivative thereof. A reaction product or blend of a polyaniline or a derivative thereof with an organic sulfonic acid or a derivative thereof can be brought to an easy-to-handle or directly melt-processable form through a heat-treatment process carried out at approx. +40.degree. to +250.degree. C. The obtained plastic material is advantageously further improved by blending the heat-treated reaction product or blend with a thermoplastic polymer and then melt-processing the mixed blend. The properties of the resulting compound material exhibit complete compatibility of the heat-treated reaction product or blend with the thermoplastic polymer.

Electrically conductive compositions and methods for their preparation

Method for preparing a conductive polymer

The invention relates to a conductive polymer composite wherein the internally conductive polymer component consists of a polymer of a 3-substituted thiophene, the polymer being doped with a suitable electron acceptor or electron emitter compound. The polymer composite is prepared by processing in molten state by various methods such as extrusion molding, injection molding, compression molding, or sheet blowing, together with a suitable polymer matrix, to form a homogenous composite.

Conductive plastic composites

The invention relates to the homogenization of mixtures of internally conductive polymers like 3-substituted polythiophene and matrix polymers. With an efficient homogenization the conductivity is improved when the portion of the conductive polymer is low. An efficient homogenization is achieved in the invention by mixing the internally conductive polymer with a monomer or by dissolving it into it, after which the monomer is polymerized. The plastic composites so obtained are used for several purposes in which conductivity is needed, such as EMI and ESD shielding.

Conductive plastic composite and its preparation and use

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Helsinki, Finland

Jukka Laakso