P
USH1901HExpiredUtilityPatentIndex 63

Flame retardant chemical resistant thermoplastic molding composition

Assignee: BAYER AGPriority: Aug 3, 1994Filed: Aug 3, 1994Granted: Oct 3, 2000
Est. expiryAug 3, 2014(expired)· nominal 20-yr term from priority
Inventors:MASON JAMES P
C08L 67/02C08L 51/04C08L 69/00C08L 27/18
63
PatentIndex Score
5
Cited by
7
References
12
Claims

Abstract

A flame retardant thermoplastic composition having an improved level of chemical resistance is disclosed. The composition which contains about 1 to 14 pbw bromine, comprises (i) a bromine containing carbonate polymer, (ii) a thermoplastic polyester resin, (iii) a graft polymer, (iv) a phosphorous containing compound conforming to O=P-[-OCH2C(CH2Br)3]3 and optionally (v) polytetrafluoroethylene (herein PTFE).

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
       1. A thermoplastic molding composition comprising (i) about 40 to 90% bromine-containing carbonate component,   (ii) about 10 to 50% thermoplastic polyester resin,   (iii) about 1 to 15% graft polymer,   (iv) about I to 7% compound conforming to   O═P--[--OCH.sub.2 C(CH.sub.2 Br).sub.3 ].sub.3     and optionally     (v) a positive amount up to 1% polytetrafluoroethylene, said composition containing bromine in an amount of about 1 to 14%, said percents being relative to the weight of the composition, said carbonate component containing bromine in an amount of about 1.0 to 10.0 percent relative to its weight.   
     
     
       2. A thermoplastic molding composition comprising (i) about 40 to 60% bromine-containing carbonate component,   (ii) about 20 to 40% thermoplastic polyester resin,   (iii) about 5 to 10% graft polymer,   (iv) about 2 to 5% compound conforming to   O═P--[--OCH.sub.2 C(CH.sub.2 Br).sub.3 ].sub.3     and     (v) about 0.05 to 0.4% polytetrafluoroethylene, said composition containing bromine in an amount of about 1 to 14%, said percents being relative to the weight of the composition, said carbonate component containing bromine in an amount of about 1.0 to 10.0 percent relative to its weight.   
     
     
       3. The composition of claim 1 wherein said composition contains about 6 to 12% bromine. 
     
     
       4. The composition of claim 2 wherein said composition contains about 6 to 12% bromine. 
     
     
       5. The composition of claim 3 wherein said carbonate component contains about 4.0 to 7.0% bromine. 
     
     
       6. The composition of claim 4 wherein said carbonate component contains about 4.0 to 7.0% bromine. 
     
     
       7. The composition of claim 1 wherein thermoplastic polyester is polyethylene terephthalate. 
     
     
       8. The composition of claim 1 wherein graft polymer is ABS resin. 
     
     
       9. The composition of claim 1 wherein thermoplastic polyester is polyethylene terephthalate resin and graft polymer is ABS resin. 
     
     
       10. The composition of claim 1 wherein said graft polymer has an acrylate rubber graft base. 
     
     
       11. The composition of claim 1 wherein said graft polymer has a core shell structure. 
     
     
       12. The composition of claim 1 wherein said graft polymer has an acrylate-siloxane rubber graft base.

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