Resin composition for high dielectric constant materials, molded article containing same, and master batch for coloring

Abstract

This resin composition for high dielectric constant materials contains 40-80% by mass of (A) a resin material and 20-60% by mass of (B) a carbon black. The carbon black (B) has a DBP absorption of 10-50 mL/100 g and an iodine adsorption of 5-40 mg/g. This resin composition for high dielectric constant materials has a dielectric constant of 4 or more and a dielectric loss tangent of 0.05 or less.

1 . A resin composition which consists of 40 to 80% by mass of a resin material (A) and 20 to 60% by mass of a carbon material that consists of carbon black (B),
 wherein the carbon black (B) has a DBP absorption of 30 to 50 mL/100 g and an iodine adsorption of 5 to 12 mg/g; and   optionally one or more additives selected from the group consisting of a foaming agent, a lubricant, a flowability improvement agent, a dye, a thermal stabilizer, an impact resistance improvement agent, and a dispersant, wherein the thermal stabilizer is one or more selected from the group consisting of a hindered phenol-based compound, a phosphite-based compound, a phosphonate-based compound, and zinc oxide,   wherein the impact resistance improvement agent is one or more selected from the group consisting of SBS (styrene-butadiene-styrene) and SEBS (styrene-ethylene-butylene-styrene) and hydrogenated products thereof, SIS (styrene-isoprene-styrene) and SEPS (styrene-ethylene-propylene-styrene) and hydrogenated products thereof, multilayer-structured polymers including an olefin-based elastomer, a polyester-based elastomer, a silicone-based rubber, an acrylate-based rubber and an alkyl (meth)acrylate-based polymer, and composite rubber-based graft copolymers obtained by graft-polymerizing a vinyl-based monomer onto a composite rubber consisting of a silicone-based rubber and an acrylate-based rubber component.   
     
     
         2 . The resin composition according to  claim 1 , which consists of 50 to 60% by mass of the resin material (A) and 40 to 50% by mass of the carbon black (B), wherein the carbon black (B) has a DBP absorption of 30 to 35 mL/100 g. 
     
     
         3 . The resin composition according to  claim 1 , wherein the carbon black (B) has a nitrogen adsorption specific surface area of 5 to 40 m 2 /g. 
     
     
         4 . The resin composition according to  claim 1 , wherein the carbon black (B) has a ratio of a value of the nitrogen adsorption specific surface area (m 2 /g) to a value of the iodine adsorption (mg/g) of less than 1.3. 
     
     
         5 . The resin composition according to  claim 1 , wherein the resin material (A) is a polycarbonate resin, a modified polyphenylene ether resin, a polyphenylene sulfide resin or a polycarbonate/ABS alloy. 
     
     
         6 . The resin composition according to  claim 1 , wherein the resin material (A) is a polycarbonate resin. 
     
     
         7 . A molded article containing the resin composition according to  claim 1 . 
     
     
         8 . A molded article obtained by two-color molding of the resin composition according to  claim 6  and a polycarbonate resin (D). 
     
     
         9 . The molded article according to  claim 8 , which consists of a layer of the resin composition and a layer of the polycarbonate resin (D), wherein the thickness of the layer of the polycarbonate resin (D) is 0.1 to 5 mm. 
     
     
         10 . The molded article according to  claim 8 , wherein the polycarbonate resin (D) contain an inorganic filler. 
     
     
         11 . The resin composition according to  claim 1 , wherein the resin composition has a dielectric constant of 4 or more and a dielectric loss tangent of 0.05 or less. 
     
     
         12 . A high dielectric constant material, comprising a resin composition, and at least one of a thermal stabilizer, a filler, a reinforcing agent, a weather resistance improvement agent, a foaming agent, a lubricant, a flowability improvement agent, an impact resistance improvement agent, a dye, a pigment and a dispersant;
 wherein the resin composition consists of 40 to 80% by mass of a resin material (A), and 20 to 60% by mass of a carbon material that consists of carbon black (B), wherein the carbon black (B) has a DBP absorption of 30 to 50 mL/100 g and an iodine adsorption of 5 to 12 mg/g; and   wherein the thermal stabilizer is one or more selected from the group consisting of a hindered phenol-based compound, a phosphite-based compound, a phosphonate-based compound, and zinc oxide, wherein the impact resistance improvement agent is one or more selected from the group consisting of SBS (styrene-butadiene-styrene) and SEBS (styrene-ethylene-butylene-styrene) and hydrogenated products thereof, SIS (styrene-isoprene-styrene) and SEPS (styrene-ethylene-propylene-styrene) and hydrogenated products thereof, multilayer-structured polymers including an olefin-based elastomer, a polyester-based elastomer, a silicone-based rubber, an acrylate-based rubber and an alkyl (meth)acrylate-based polymer, and composite rubber-based graft copolymers obtained by graft-polymerizing a vinyl-based monomer onto a composite rubber consisting of a silicone-based rubber and an acrylate-based rubber component.   
     
     
         13 . A master batch for coloring, which contains a carbon black (E) and a resin material (F), wherein the carbon black (E) has a DBP absorption of 10 to 50 mL/100 g and an iodine adsorption of 10 to 30 mg/g. 
     
     
         14 . The master batch for coloring according to  claim 13 , wherein the DBP absorption is 25 to 35 mL/100 g. 
     
     
         15 . The master batch for coloring according to  claim 13 , wherein the content of the carbon black (E) is 10 to 90% by mass and the content of the resin material (F) is 10 to 90% by mass. 
     
     
         16 . The master batch for coloring according to  claim 13 , wherein the resin material (F) is at least one selected from the group consisting of a polycarbonate resin, a polystyrene-based resin, a polyamide-based resin, a polyester-based resin and a polyacetal-based resin. 
     
     
         17 . The master batch for coloring according to  claim 16 , wherein the resin material (F) is a polycarbonate resin. 
     
     
         18 . The master batch for coloring according to  claim 13 , further containing a thermal stabilizer. 
     
     
         19 . A molding material containing the master batch for coloring according to  claim 13  and a resin to be colored.