40results about How to "Good volume resistivity" patented technology

To provide metal-containing fine particles having good dispersion stability, which have their surface coated with dispersants vaporizable even during firing at low temperatures, a fine particle dispersion having the above metal-containing fine particles dispersed therein, and an electroconductive metal-containing material having an excellent volume resistivity formed by using the fine particle dispersion. Metal-containing fine particles with their surface coated with at least two dispersants having different vaporization temperatures.

The invention discloses a modified ethylene-propylene diene copolymer cable material and a preparation method thereof. The cable material is composed of a mixture A and a mixture B, wherein the mixture A comprises, by weight, 90-110 parts of ethylene-propylene diene copolymer, 1-3 parts of antiager RD, 2-4 parts of zinc oxide, 8-12 parts of dioctyl phthalate, 4-6 parts of ethylenebisoctadecanamide, 1-3 parts of 3-aminopropyltrimethoxysilane, 2-4 parts of triallyI isocyanurate, 18-22 parts of nano-montmorillonite, 28-32 parts of nano-aluminum oxide and 18-22 parts of nano-magnesium oxide; the mixture B comprises, by weight, 50-70 parts of maleic anhydride grafted ethylene-ethyl acetate copolymer, 20-30 parts of methyl vinyl silicon rubber, 20-30 parts of modified nano-powder, 0.3-05 part of poly(4-methyl-1-pentene), 5-10 parts of polycaprolactone, 1-3 parts of N, N'-m-phenylenedimaleimide, 1.5-2.5 parts of vinyl-tri-(beta-methoxyethoxy)- silicane, 2-3 parts of sodium dibutylnaphthalenesulfonate, 1-3 parts of acrylic emulsion and 10-15 parts of zinc borate. Compared with the conventional ethylene-propylene diene copolymer cable material, the modified ethylene-propylene diene copolymer cable material has the advantages of high oxygen index, high mechanical strength, excellent elongation at break and high volume resistivity.

[Problem] To provide an insulation material that has an excellent volume resistivity while retaining the balance among various capabilities including the mechanical strength, the heat resistance, the oil resistance, the bleed-out resistance, the plasticizer migration resistance, and the like, equivalent to a resin composition containing an ordinary phthalate ester.[Solution] An insulation material containing a resin composition containing: an ester (i) having one or more constitutional unit represented by the following formula (A) (wherein R1 and R2 each independently represent an alkyl group having from 1 to 4 carbon atoms); and a resin (ii).

The invention discloses an environment friendly high flame-retardant polyvinyl chloride insulation material for a high frequency communication cable and a preparation method of the environment friendly high flame-retardant polyvinyl chloride insulation material. The environment friendly high flame-retardant polyvinyl chloride insulation material is prepared from the following raw material components: 80 to 100 parts of polyvinyl chloride resin, 5 to 15 parts of plasticizer, 5 to 10 parts of secondary plasticizer, 2 to 5 parts of antimony trioxide, 15 to 30 parts of polymer modifier, 0. 2 to 0.5 part of antioxidant, 8 to 10 parts of elastomer, 2 to 4 parts of polyolefin, 5 to 20 parts of inorganic flame retardant and 0.01 to 20 parts of inorganic filler; the raw materials are weighed according to respective parts by mass, and then are subject to kneading, fully melt-mixing by a double screw, and extruding for pelleting, so as to obtain the environment friendly high flame-retardant polyvinyl chloride insulation material. The polyvinyl chloride insulation material is very low in dielectric constant, good in volume resistivity and lower in impact brittleness temperature, is high in flame retardant property, and is widely used as an insulating layer of a communication cable and a power cable, and the flame-retardant polyvinyl chloride can be applied to the high frequency communication field.

The purpose of the present invention is to provide a thermosetting resin composition which does not cause environmental issues such as VOC and has excellent curability (in particular, curability at low temperatures) comparable to the case in which a diallyl phthalate monomer is used as a crosslinking agent. A thermosetting resin composition of the present invention is characterized by containing:an unsaturated polyester resin; an alicyclic polyfunctional allyl ester represented by formula (1) (in the formula, n represents an integer of 2-4, and Z is an n-valent alicyclic hydrocarbon group); one kind of initiator selected from the group consisting of peroxy ketals, peroxy esters, dialkyl peroxides, and peroxy carbonates, and having a one-minute half-life temperature in the range of 100-250DEG C and a molecular weight of 100-400 has excellent curability at low temperatures.

A conductive paste and method of manufacturing thereof. The conductive paste comprises conductive particles dispersed in an organic medium, the organic medium comprising: (a) a solvent; and (b) a binder comprising a polyester. The conductive paste typically comprises silver and may contain various other additives. A stretchable conductive layer can be formed by curing the conductive paste.

A computation unit (300) finds the resistivity of a carrier liquid in a carrier tank by computation. A resistivity computation unit (302) finds the resistivity of the carrier liquid on the basis of "the liquid quantity for each number of times of passage of the carrier liquid that has passed through a separation and extraction device" and "the resistivity for each number of times of passage of thecarrier liquid that has passed through the separation and extraction device". "The liquid quantity for each number of times of passage" is computed by a deterioration degree distribution computationunit 301 and stored in a memory (201). Regarding "the resistivity for each number of times of passage", the resistivity of the carrier liquid after the carrier liquid has passed through the separationand extraction device is prestored in the memory (201) for each number of times of passage. A carrier replenishment determination unit (202) determines, on the basis of the found resistivity of the carrier liquid, whether a replenishment carrier liquid is replenished or not. A control unit (200) controls a replenishment pump (51) on the basis of the determination.