Opaquely colored, infra-red plastics molding composition and methods of making the opaquely colored, infra-red plastics molding compostion

Abstract

The invention relates to subduedly colored (brown, gray, black, green), infrared reflecting PMMA compounds which can be applied to other plastic compounds as an IR barrier layer

1 - 9 . (canceled) 
     
     
         10 . An IR-reflective opaquely dark-colored molding composition comprising:
 (a) from 95 to 99.5% by weight, based on the total weight of the composition, of polymethyl (meth)acrylate; and   (b) from 5 to 0.5% by weight, based on the total weight of the composition, of an IR-reflective pigment selected from the group consisting of cobalt titanite green spinel having the CAS Number 68186-85-6, chromium oxide having the CAS Number 68909-79-5, iron chromite brown spinel having the CAS Number 68187-09-7, chromium iron oxide having the CAS Number 109414-04-2, nickel iron chromite black spinel having the CAS Number 71631-15-7, and combinations thereof,   wherein the dark-colored molding composition, when irradiated with a 60 W incandescent bulb with a voltage of 220 V, at a distance of 50 mm from the dark-colored molding composition, for 20 minutes, shows a temperature increase of 50° C. or less, and wherein the dark colored molding composition has a Cielab L* value below 41.   
     
     
         11 . The molding composition of  claim 10 , comprising the IR-reflective pigment cobalt titanite green spinel having the CAS Number 68186-85-6. 
     
     
         12 . The molding composition of  claim 10 , comprising the IR-reflective pigment chromium oxide having the CAS Number 1308-38-9. 
     
     
         13 . The molding composition of  claim 10 , comprising the IR-reflective pigment iron chromite brown spinel having the CAS Number 68187-09-7. 
     
     
         14 . The molding composition of  claim 10 , comprising the IR-reflective pigment chromium iron oxide having the CAS Number 109414-04-2. 
     
     
         15 . The molding composition of  claim 10 , comprising the IR-reflective pigment nickel iron chromite black spinel having the CAS Number 71631-15-7. 
     
     
         16 . A method of producing a dark-colored plastic molding, the method comprising
 coating a plastic molding with one or more layers of the dark-colored molding composition according to  claim 10 .