Light-Emitting Diode Assembly Housing Comprising Poly(Cyclohexanedimethanol Terephthalate) Compositions

Abstract

Light-emitting diode assembly housing comprising high temperature poly(1,4-cyclohexanedimethanol terephthalate) compositions containing titanium dioxide.

1 . A light-emitting diode housing comprising a poly(1,4-cyclohexanedimethanol terephthalate) composition, comprising:
 (e) about 40 to about 95 weight percent poly(1,4-cyclohexanedimethanol terephthalate); and   (f) about 5 to about 60 weight percent of titanium dioxide;   (g) 0 to about 40 weight percent of at least one inorganic reinforcing agent or filler; and   (h) 0 to about 3 weight percent of at least one oxidative stabilizer;   wherein the weight percentages are based on the total weight of the composition.   
     
     
         2 . The housing of  claim 1 , wherein the poly(1,4-cyclohexanedimethanol terephthalate) is present in about 50 to about 85 weight percent, based on the total weight of the composition. 
     
     
         3 . The housing of  claim 1 , wherein the titanium dioxide is present in about 15 to about 50 weight percent, based on the total weight of the composition. 
     
     
         4 . The housing of  claim 1 , wherein the titanium dioxide is present in about 20 to about 40 weight percent, based on the total weight of the composition. 
     
     
         5 . The housing of  claim 1 , wherein the titanium dioxide has an inorganic coating and an organic coating. 
     
     
         6 . The housing of  claim 5 , wherein the inorganic coating is a metal oxide. 
     
     
         7 . The housing of  claim 5 , wherein the organic coating is one or more of carboxylic acids, polyols, alkanolamines, and/or silicon compounds. 
     
     
         8 . The housing of  claim 7 , wherein the carboxylic acid is one or more of adipic acid, terephthalic acid, lauric acid, myristic acid, palmitic acid, stearic acid, polyhydroxystearic acid, oleic acid, salicylic acid, malic acid, and maleic acid. 
     
     
         9 . The housing of  claim 7 , wherein the silicon compound is one or more of silicates, organic silanes, and organic siloxanes, including organoalkoxysilanes, aminosilanes, epoxysilanes, mercaptosilanes, and polyhydroxysiloxanes. 
     
     
         10 . The housing of  claim 9 , wherein the silane is one or more silanes selected from: hexyltrimethoxysilane, octyltriethoxysilane, nonyltriethoxysilane, decyltriethoxysilane, dodecyltriethoxysilane, tridecyltriethoxysilane, tetradecyltriethoxysilane, pentadecyltriethoxysilane, hexadecyltriethoxysilane, heptadecyltriethoxysilane, octadecyltriethoxysilane, N-(2-aminoethyl) 3-aminopropylmethyldimethoxysilane, N-(2-aminoethyl) 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, and 3-mercaptopropyltrimethoxysilane. 
     
     
         11 . The housing of  claim 1 , wherein in the poly(1,4-cyclohexanedimethanol terephthalate) at least 90 mole percent of the diol repeat units are derived from 1,4-cyclohexanedimethanol and at least 90 mole percent of the dicarboxylic acid repeat units are derived from terephthalic acid. 
     
     
         12 . The housing of  claim 1 , wherein the inorganic filler and/or reinforcing agent is one or more selected from glass fibers, wollastonite, calcium carbonate, talc, mica, and kaolin. 
     
     
         13 . The housing of  claim 1 , wherein the inorganic filler is present in about 5 to about 40 weigh percent, based on the total weight of the composition. 
     
     
         14 . The housing of  claim 1 , wherein the oxidative stabilizer is one or more selected from phosphite stabilizers, hypophosphite stabilizers, hindered phenol stabilizers, hindered amine stabilizers, thioesters, and aromatic amine stabilizers. 
     
     
         15 . The housing of  claim 1 , wherein the oxidative stabilizer is present in about 0.1 to about 3 weight percent, based on the total weight of the composition. 
     
     
         16 . The housing of  claim 1 , wherein the poly(1,4-cyclohexanedimethanol terephthalate) composition further comprises about 0.1 to about 3 weight percent, based on the total weight of the composition, of ultraviolet light stabilizers. 
     
     
         17 . A light-emitting diode assembly comprising the housing of  claim 1 .