Plastic mixture with electromagnetic shielding characteristics

Details Plastic mixture with electromagnetic shielding characteristics Plastic mixture with electromagnetic shielding characteristics

1987-08-04

1988-11-08

Barr, Josephine

Compositions

Electrically conductive or emissive compositions

Elemental carbon containing

252135, 252 03, 252506, 252507, 252510, 252518, 252520, 523137, 524495, 524496, 524440, 524156, 524213, 524107, 524412, 524420, 524413, 524436, H01B 106, C09D 532

Patent

active

047832797

ABSTRACT:
The invention relates to a plastic mixture with electromagnetic shielding characteristics based on a matrix with a content of ferroelectrics and electrically conductive and/or ferromagnetic fillers, which is characterized in that the ferroelectric component has a Curie point or a phase transition range from the ferroelectric into the paraelectric phase covering the Curie point and which is in the range of the use temperature of -40.degree. to +98.degree. C. of the electromagnetic shielding material and, based on the electromagnetic material volume, is present in a quantity of 1 to 20 vol. %, whilst the electrically conductive or ferromagnetic fillers are present in quantitites of 5 to 15 vol. %, the ferroelectric component preferably being an organic compound selected from the group consisting of semi carbadize-hydrochloride, 3,4-dihydroxy-3-cyclobutene-1,2-dione and triglycine sulphate and the inorganic compound is from the group consisting of barium-strontium titanate and antimony iodide sulphide.

REFERENCES:
patent: 4159364 (1979-06-01), Craig
patent: 4493912 (1985-01-01), Duageon et al.

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