Flame retardant resin composition and cable using the same

• US 9,982,119 B2
• Filed: 12/03/2014
• Issued: 05/29/2018
• Est. Priority Date: 12/04/2013
• Status: Active Grant

• Current Assignee: Fujikura Limited
• Original Assignee: Fujikura Limited
• Inventors: Kohri, Haruka, Iwata, Masayuki, Watanabe, Tomohisa
• Primary Examiner(s): JONES JR., ROBERT STOCKTON
• Application Number:
  US15/038,753
• Publication Number:
  US 20170051136A1
• Time in Patent Office: 1,273 Days
• CPC Class Codes: C08K 5/098 Metal salts of carboxylic acids
• CPC Class Codes: C08L 2201/02 Flame or fire retardant/resistant
• CPC Class Codes: C08L 23/02 not modified by chemical after-treatment
• CPC Class Codes: C08L 23/06 Polyethene
• CPC Class Codes: C08L 23/0853 Vinylacetate
• CPC Class Codes: C08L 23/0869 Acids or derivatives thereof
• CPC Class Codes: C08L 23/12 Polypropene
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: C09K 21/02 Inorganic materials
• CPC Class Codes: G02B 6/4436 Heat resistant
• CPC Class Codes: H01B 13/14 by extrusion extrusion in general B29C48/00
• CPC Class Codes: H01B 3/441 from alkenes
• CPC Class Codes: H01B 3/447 from acrylic compounds
• CPC Class Codes: H01B 3/448 from other vinyl compounds
• CPC Class Codes: H01B 3/46 silicones
• CPC Class Codes: H01B 7/0275 comprising one or more extruded layers of insulation
• CPC Class Codes: H01B 7/295 using material resistant to flame

Abstract

In a flame retardant resin composition containing a polyolefin resin, a silicone-based compound blended at a ratio of 1.5 parts by mass or more and 20 parts by mass or less relative to 100 parts by mass of the polyolefin resin, a fatty acid containing compound blended at a ratio of 5 parts by mass or more and 20 parts by mass or less relative to 100 parts by mass of the polyolefin resin, and an inorganic flame retardant blended at a ratio of 5 parts by mass or more and 40 parts by mass or less relative to 100 parts by mass of the polyolefin resin, the decomposition onset temperature of the inorganic flame retardant is lower than the decomposition onset temperature of the silicone-based compound.

Claims

1. A flame retardant resin composition comprising:

a polyolefin resin;

a silicone-based compound blended at a ratio of 1.5 parts by mass or more and 20 parts by mass or less relative to 100 parts by mass of the polyolefin resin;

a fatty acid containing compound blended at a ratio of 5 parts by mass or more and 20 parts by mass or less relative to 100 parts by mass of the polyolefin resin; and

an inorganic flame retardant blended at a ratio of 5 parts by mass or more and 40 parts by mass or less relative to 100 parts by mass of the polyolefin resin,

wherein the decomposition onset temperature of the inorganic flame retardant is lower than the decomposition onset temperature of the silicone-based compound, and

wherein the difference between the decomposition onset temperature in helium of the inorganic flame retardant and decomposition onset temperature in helium of the silicone-based compound is more than 0°

C. and 250°

C. or less;

wherein the composition consists of the polyolefin resin, the silicone-based compound, the fatty acid containing compound, the inorganic flame retardant, and at least one additive selected from the group consisting of an oxidation inhibitor, an ultraviolet ray deterioration inhibitor, a processing aid, a coloring agent, and an anti-static agent;

the oxidation inhibitor is formed of at least one selected from the group consisting of a phenol-based oxidation inhibitor, an amine-based oxidation inhibitor, a sulfur-based oxidation inhibitor, a phosphorus-based oxidation inhibitor, a hydrazine-based oxidation inhibitor, an amide-based oxidation inhibitor, phosphoric acid, and citric acid,

the ultraviolet ray deterioration inhibitor is formed of at least one selected from the group consisting of a benzophenone-based ultraviolet ray deterioration inhibitor, a salicylate-based ultraviolet ray deterioration inhibitor, a benzotriazole-based ultraviolet ray deterioration inhibitor, an acrylonitrile-based ultraviolet ray deterioration inhibitor, a metal complex salt-based ultraviolet ray deterioration inhibitor, and a hindered amine-based ultraviolet ray deterioration inhibitor,

the processing aid is formed of at least one selected from the group consisting of a hydrocarbon-based processing aid, a fatty acid-based processing aid, a fatty acid amide-based processing aid, an ester-based processing aid, an alcohol-based processing aid, a metal soap, and wax,

the coloring agent is formed of at least one selected from the group consisting of an inorganic pigment, an organic pigment, and a dye, and

the anti-static agent is formed of at least one selected from the group consisting of a cationic active agent, an anionic active agent, a non-ionic active agent, and an amphoteric active agent.

2. The flame retardant resin composition according to claim 1, wherein the inorganic flame retardant is aluminum hydroxide.

3. The flame retardant resin composition according to claim 1, wherein the inorganic flame retardant is blended at a ratio of 10 parts by mass or more and 25 parts by mass or less relative to 100 parts by mass of the polyolefin resin.

4. The flame retardant resin composition according to claim 1, wherein the fatty acid containing compound is magnesium stearate or calcium stearate.

5. A cable comprising an insulated wire which has a conductor and an insulating layer covering the conductor, wherein the insulating layer is formed of the flame retardant resin composition according to claim 1.

6. A cable having a conductor, an insulating layer covering the conductor, and a sheath covering the insulating layer, wherein at least one of the insulating layer and the sheath is formed of the flame retardant resin composition according to claim 1.

7. A cable having a sheath and an optical fiber provided on the inner side of the sheath or provided to penetrate the sheath, wherein the sheath is formed of the flame retardant resin composition according to claim 1.

8. The flame retardant resin composition according to claim 1, wherein the decomposition onset temperature of the silicone-based compound is lower than the decomposition onset temperature of the polyolefin resin.

9. The flame retardant resin composition according to claim 8, wherein the difference between the decomposition onset temperature in helium of the silicone-based compound and the decomposition onset temperature in helium of the polyolefin resin is 100 to 250°

C.

10. The flame retardant resin composition according to claim 1, wherein the difference between the decomposition onset temperature in helium of the inorganic flame retardant and decomposition onset temperature in helium of the silicone-based compound is 50 to 250°

C.

11. The flame retardant resin composition according to claim 10, wherein the difference between the decomposition onset temperature in helium of the inorganic flame retardant and decomposition onset temperature in helium of the silicone-based compound is 50 to 150°

C.

12. The flame retardant resin composition according to claim 1, wherein the difference between the decomposition onset temperature in helium of the inorganic flame retardant and decomposition onset temperature in helium of the silicone-based compound is more than 0°

C. and 150°

C. or less.

13. The flame retardant resin composition according to claim 12, wherein when an EGA thermogram is measured at the following conditions by using a thermal analysis and gas chromatograph-mass spectrometry in which a sample loading part equipped with a thermal decomposition device and a gas chromatograph-mass spectrometry are connected to each other via a capillary tube made of SUS, the decomposition onset temperature is a temperature which corresponds to a peak rising point with respect to a baseline in the thermogram:

temperature increasing rate in thermal decomposition device is 50°

C./min,

temperature range is 70 to 700°

C.,

column oven temperature is 320°

C.,

carrier gas is helium,

pressure is 90.0 kPa, and

column flow rate is 0.92 mL/min.

14. The flame retardant resin composition according to claim 12, wherein the difference between the decomposition onset temperature in helium of the inorganic flame retardant and decomposition onset temperature in helium of the silicone-based compound is more than 0°

C. and 110°

C. or less.