Electroconductive Resins

Electroconductive resin compositions, which are useful for packaging electronic devices, have been described. In general, electroconductive resin compositions are made up from a thermoplastic resin and an electroconductive filler, mostly carbon black. Polyphenylene ether) resins are known to impart heat resistance. For general purposes, a poly(styrene) (PS) resin and an ABS resin are superior to other resins in that even if carbon black is incorporated in a large amount, there will be no substantial decrease in the flowability or 

In these compositions, a common drawback is that carbon black is likely to fall off from the surface of a molded product by abrasion. Special formulations composed from a variety of resin components that overcome this drawback have been developed (83). In this way, contamination of integrated circuits (IQs, etc., to be caused by falling off of carbon black, by abrasion when contacted with ICs can be substantially reduced. 

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Some polymers from styrene derivatives seem to meet specific market demands and to have the potential to become commercially significant materials. For example, monomeric chlorostyrene is useful in glass-reinforced polyester recipes because it polymerizes several times as fast as styrene (61). Poly(sodium styrenesulfonate) [9003-59-2] a versatile water-soluble polymer, is used in water-poUution control and as a general flocculant (see Water, INDUSTRIAL WATER TREATMENT FLOCCULATING AGENTs) (63,64). Poly(vinylhenzyl ammonium chloride) [70304-37-9] h.a.s been useful as an electroconductive resin (see Electrically conductive polya rs) (65). 

T. Miyakawa, K. Ogita, M. Hiura, and M. Oda, Electroconductive resin composition, US Patent 7 261840, assigned to Denki Kagaku Kogyo Kabushiki Kaisha (Tokyo, JP), August 28, 2007. 

Co. It consists of a sheet of paper coated with an electroconductive resin. 

Ryzhenko val, P. Ph. D. thesis in Engineering Science, Influence of electric current on the oxidation of the electroconductive resin composition based on polypropylene and SKI-3. 

C6o fullerene surfaces were thermally functionalized with perfluoro-(3-oxo-penta-4-ene)sulfonyl fluoride and then converted into sulfonic acid derivatives by basic hydrolysis. The product mimiced the electroconductive properties of perfluorosulfonyl Nation 1100 resins. When the modified fullerence was blended with platinum nanoparticles imbedded in Nation 1100 the material was effective as electrodes in fuel cells. 

Use Electroconductive and electroluminescent coatings, mordant in dyeing textiles, perfume stabilization, manufacture of fuchsin, color lakes, ceramic coatings, bleaching agent for sugar, stabilizer for certain resins, manufacture of blueprint and other sensitized papers, other tin salts, bacteria and fungi control in soaps. 

The solution adopted by LNP Engineering Plastics in its electroconductive Faradex compounds, notably Faradex DS-1003 FR HI, has been to incorporate a balanced dispersion of stainless steel fibres (1 %-2% by volume and 10%-20% by weight). This custom colourable, halogen-free fire resistant compound, based on Lexan EXL PC resin, provides both EMI shielding of between 20 dB and 60 dB and electrostatic dissipative qualities. 

As mentioned earlier, the addition of powdered metals to polymeric materials eliminates electrostatic charges on their surface. But electric properties of materials such as vulcanized rubbers filled this way are not stable for this reason, powdered metals are used only for polymer-based electroconducting varnishes [5,6] and adhesives [7]. In these cases, the powdered metals (Ag, Au, Ni, Al, Cu) are impregnated with epoxy resins or added to polyamides, PVC, silicones, etc. [1,5,8]. 

Novak 1, Krupa 1, Chodak 1 (2004) Electroconductive adhesives based on epoxy and poiyurethane resins filled with silver-coated inorganic fiiiers. Synth Metals... 

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