# US 10,480,749 B2 · Polyamide composition for reflector, reflector, light emitting device including the reflector, and lighting device and image display device each including the light emitting device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,480,749 B2 - Document ID: US10480749B2 - Status: Granted - Kind: B2 - Application number: 13/932,809 - Filed: 2013-07-01 - Published: 2013-10-31 - Granted: 2019-11-19 - Earliest claimed: 2011-01-28 - Assignees: Kuraray Co., Ltd. - Applicants: Kuraray Co., Ltd - Inventors: Kozo Tamura; Takaharu Shigematsu; Shimon Kanai - Web page: https://patentgrep.com/patent/US10480749B2 ## CPC - F21V 7/22: characterised by materials, surface treatments or coatings, e.g. dichroic reflectors - C08G 69/26: derived from polyamines and polycarboxylic acids - C08G 69/265: {from at least two different diamines or at least two different dicarboxylic acids} - C08K 3/22: of metals - H10H 20/856: Reflecting means - C08K 3/013: Fillers, pigments or reinforcing additives - C08K 2003/2241: {Titanium dioxide} - C08K 2201/014: Additives containing two or more different additives of the same subgroup in C08K - H10H 20/8506: {Containers} - H10W 72/07554: {changes in dispositions} - H10W 72/547: {Dispositions of multiple bond wires} - H10W 90/756: {between a chip and a stacked lead frame, conducting package substrate or heat sink} - Y10T 428/31725: Of polyamide - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The present invention provides a polyamide composition for a reflector having high heat resistance and good mechanical properties, having excellent adhesion to a sealing material for an LED package, and capable of retaining a high reflectance even after exposure to heat and light intended for the production process of the LED package and the environment in which the reflector is used in the LED package, when it is molded. The present invention is a polyamide composition for a reflector, containing: 30 mass % or more of a polyamide (A) having a melting point of 280° C. or higher; and 25 mass % or more of titanium oxide (B). The total content of the polyamide (A) and the titanium oxide (B) is 75 mass % or more. ## Claims ### Claim 1 A polyamide composition for a reflector, comprising: 30 mass % or more of a polyamide (A) having a melting point of 280° C. or higher; 30 mass % or more of titanium oxide (B); a light stabilizer (D); magnesium oxide; and a mold release agent; wherein the polyamide composition does not comprise a reinforcing material (C), wherein dicarboxylic acid units of the polyamide (A) comprise 70 mol. % or more terephthalic acid units, wherein a total content of the polyamide (A) and the titanium oxide (B) is 80 mass % or more, and wherein the polyamide (A) contains units derived from an end-capping agent and the content of the units derived from the end-capping agent is from 3.5 to 8.5 mol. % with respect to the diamine units. ### Claim 2 (depends on 1) The polyamide composition according to claim 1, wherein diamine units of the polyamide (A) comprise 50 mol. % or more of aliphatic diamine units having 4 to 18 carbon atoms. ### Claim 3 (depends on 2) The polyamide composition for a reflector according to claim 2, wherein the aliphatic diamine units having 4 to 18 carbon atoms are 1,9-nonanediamine units and/or 2-methyl-1,8-octanediamine units. ### Claim 4 (depends on 1) The polyamide composition for a reflector according to claim 1, further comprising magnesium hydroxide. ### Claim 5 (depends on 1) An LED, comprising a reflector comprising the polyamide composition according to claim 1. ### Claim 6 (depends on 5) The LED according to claim 5, wherein the reflector has a reflectance of 85% or more for light with a wavelength of 460 nm when measured with a spectrophotometer after the reflector is irradiated with ultraviolet light for 24 hours. ### Claim 7 (depends on 1) A light emitting device, comprising: a reflector comprising the polyamide composition according to claim 1; and an LED light source. ### Claim 8 (depends on 7) A lighting device comprising the light emitting device according to claim 7. ### Claim 9 (depends on 7) An image display device comprising the light emitting device according to claim 7. ### Claim 10 (depends on 7) The light emitting device of claim 7, which is a surface mounted device light emitting device. ### Claim 11 (depends on 1) The polyamide composition for a reflector according to claim 1, wherein the titanium oxide (B) is titanium dioxide. ### Claim 12 (depends on 1) The polyamide composition for a reflector according to claim 1, wherein the end-capping agent is a monofunctional compound selected from the group consisting of monocarboxylic acids, acid anhydrides, monoisocyanates, mono-acid halides, monoesters, monoalcohols, and monoamines. ### Claim 13 (depends on 1) The polyamide composition for a reflector according to claim 1, wherein the end-capping agent is monocarboxylic acid. ### Claim 14 A polyamide composition for a reflector, consisting of: 30 mass % or more of a polyamide (A) having a melting point of 280° C. or higher; 30 mass % or more of titanium oxide (B); a light stabilizer; magnesium oxide; and a mold release agent, wherein dicarboxylic acid units of the polyamide (A) comprise 70 mol. % or more terephthalic acid units, wherein a total content of the polyamide (A) and the titanium oxide (B) is 80 mass % or more, and the polyamide (A) contains units derived from an end-capping agent and the content of the units derived from the end-capping agent is from 3.5 to 8.5 mol. % with respect to the diamine units.