PLASTIC FLAME HOUSING AND METHOD OF MAKING THE SAME

• US 20140295363A1
• Filed: 10/08/2011
• Published: 10/02/2014
• Est. Priority Date: 10/08/2011
• Status: Abandoned Application

• Current Assignee: SABIC Global Technologies BV (Government of Saudi Arabia)
• Original Assignee: Sabic Innovative Plastics IP BV (Government of Saudi Arabia)
• Inventors: Niu, Yaming, Siripurapu, Srinivas, Sun, Xiaoyu, Faris, Richard
• Application Number:
  US14/350,528
• Publication Number:
  US 20140295363A1
• Time in Patent Office: Days
• US Class Current: 431/291
• CPC Class Codes: C08K 5/0066 Flame-proofing or flame-retarding additives
• CPC Class Codes: C08K 5/52 Phosphorus bound to oxygen only
• CPC Class Codes: C08L 69/00 Compositions of polycarbonates; Compositions of derivatives of polycarbonates
• CPC Class Codes: C11C 5/002 Ingredients
• CPC Class Codes: F21V 35/00 Candle holders

Abstract

A flame element can comprise: a flame housing, fuel, and a medium for a flame. The flame housing is formed from a composition comprising: (a) a first polycarbonate having a LOI of greater than or equal to 25% and a glass transition temperature of greater than 170° C. as measured using a differential scanning calorimetry method, wherein the first polycarbonate is derived from a monomer having the structure wherein each of A₁ and A₂ comprise a monocyclic divalent arylene group, and Y₁ is a bridging group having one or more atoms, and wherein the structure is free of halogen atoms; 10 and (b) a second polycarbonate different than the first polycarbonate.

Claims

1. A flame element, comprising:

a flame housing, wherein the flame housing is formed from a polycarbonate blend comprising;

(a) a first polycarbonate having a limited oxygen index of greater than or equal to 25% and a glass transition temperature of greater than 170°

C. as measured using a differential scanning calorimetry method, wherein the first polycarbonate is derived from a monomer having the structure HO-A₁-Y₁-A₂-OH wherein each of A₁ and A₂ comprise a monocyclic divalent arylene group, and Y₁ is a bridging group having an atom, and wherein the structure is free of halogen atoms;

(b) a second polycarbonate having a Tg of less than or equal to 170°

C. and wherein the second polycarbonate is different than the first polycarbonate;

wherein the blend has a Tg of greater than or equal to 170°

C. as measured using a differential scanning calorimetry method;

wherein a 3.2 mm plaque molded from the polycarbonate blend has a YI of less than or equal to 10;

wherein a 3.2 mm plaque molded from the polycarbonate blend has a transmission of greater than 80% as measured using a method of ASTM D1003-07; and

wherein a 3.0 mm plaque of the polycarbonate blend possesses a greater than or equal to a UL94 V0 rating; and

a fuel located in the flame housing; and

a medium for a flame located in the housing and in contact with the fuel.

6. The flame element of claim 1, wherein the first polycarbonate comprises 3,3-bis(4-hydroxyphenyl)-2-phenylisoindolin-1-one (PPPBP).

7. The flame element of any of claim 1, wherein the first polycarbonate comprises 1,1-bis(4-hydroxyphenyl)-1-phenyl-ethane (Bisphenol-AP).

8. The flame element of claim 1, wherein the first polycarbonate comprises 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethyl-cyclohexane (Bisphenol-TMC).

9. The flame element of claim 1, wherein the first polycarbonate further comprises carbonate units derived from 2,2-bis(4-hydroxyphenyl)propane (Bisphenol-A).

10. The flame element of claim 1, wherein the first polycarbonate comprises adamantyl and fluorene units.

11. The flame element of claim 1, wherein the first polycarbonate comprises an aromatic dihydroxy compound derived from adamantyl and/or fluorene units.

18. The flame element of claim 1, wherein the flame element is a candle.

2. A flame element, comprising:

a flame housing, wherein the flame housing is formed from a polycarbonate blend comprising;

(a) a first polycarbonate having a Tg of greater than 170°

C. as measured using a differential scanning calorimetry method, wherein the first polycarbonate comprises carbonate units derived from at least one of the following monomers 3,3-bis(4-hydroxyphenyl)-2-phenylisoindolin-1-one (PPPBP), 1,1-bis(4-hydroxyphenyl)-1-phenyl-ethane (Bisphenol-AP), and 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethyl-cyclohexane (Bisphenol-TMC), and a dihydroxy compound derived from fluorene and adamantane structures; and

(b) a second polycarbonate different than the first polycarbonate;

wherein, a molded article of the polycarbonate blend has a transmission of greater than or equal to 70% as measured using the method of ASTM D1003-07 at 3.2 mm in part thickness;

wherein the polycarbonate blend possesses a Tg greater than or equal to 170°

C., and a 3.0 mm plaque of the polycarbonate blend possesses a greater than or equal to a UL94 V0 rating; and

a fuel located in the flame housing; and

a medium for a flame located in the housing and in contact with the fuel.

3. A flame element, comprising:

a flame housing, wherein the flame housing is formed from a polycarbonate blend comprising;

(a) a first polycarbonate having a Tg of greater than 170°

C. as measured using a differential scanning calorimetry method, wherein the first polycarbonate comprises a polyester polycarbonate copolymer; and

(b) a second polycarbonate different than the first polycarbonate;

wherein, a molded article of the polycarbonate blend has a transmission of greater than or equal to 70% as measured using the method of ASTM D 1003-07 at or 3.2 mm in part thickness;

wherein the polycarbonate blend possesses a Tg greater than or equal to 170°

C., and a 3.0 mm plaque of the polycarbonate blend possesses a greater than or equal to a UL94 V0 rating; and

a fuel located in the flame housing; and

a medium for a flame located in the housing and in contact with the fuel.

4. A flame element, comprising:

a flame housing, wherein the flame housing is formed from a polycarbonate composition, comprising;

(a) 50 wt % to 100 wt % of a first polycarbonate having a Tg of greater than 170°

C. as measured using a differential scanning calorimetry method, wherein the first polycarbonate comprises carbonate units derived from at least one of the following monomers 3,3-bis(4-hydroxyphenyl)-2-phenylisoindolin-1-one (PPPBP), 1,1-bis(4-hydroxyphenyl)-1-phenyl-ethane (Bisphenol-AP), and 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethyl-cyclohexane (Bisphenol-TMC), and a dihydroxy compound derived from fluorene and adamantane structures; and

(b) up to 50 wt % of a second polycarbonate different than the first polycarbonate;

wherein the weight percent is based on the sum of the first polycarbonate and the second polycarbonate being equal to 100 wt %;

wherein, a molded article of the polycarbonate blend has a transmission of greater than or equal to 70% as measured using the method of ASTM D1003-07 at 3.2 mm in part thickness;

wherein the polycarbonate blend possesses a Tg greater than or equal to 170°

C., and a 3.0 mm plaque of the polycarbonate blend possesses a greater than or equal to a UL94 V0 rating; and

a fuel located in the flame housing; and

a medium for a flame located in the housing and in contact with the fuel.

5. The flame element of claim 4, wherein the first polycarbonate comprises greater than or equal to 12 mol % of carbonate units derived from at least one of the following 3,3-bis(4-hydroxyphenyl)-2-phenylisoindolin-1-one (PPPBP), 1,1-bis(4-hydroxyphenyl)-1-phenyl-ethane(Bisphenol-AP), and 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethyl-cyclohexane (Bisphenol-TMC).

12. The flame element of claim 5, wherein the first polycarbonate further comprises carbonate units derived from 2,2-bis(4-hydroxyphenyl)propane (Bisphenol-A).

13. The flame element of claim 4, wherein the second polycarbonate comprises less than 50 wt % of the polycarbonate blend and wherein the first polycarbonate comprises greater than or equal to 50 wt % of the polycarbonate blend based on the sum of the first and second polycarbonates being equal to 100 wt %.

14. The flame element of claim 4, wherein the polycarbonate blend comprises 10 wt % to 20 wt % of the first polycarbonate and 80 wt % to 90 wt % of the second polycarbonate, based on the sum of the first and the second polycarbonate being equal to 100 wt %.

15. The flame element of claim 4, wherein the first polycarbonate comprises 4,4′

-(3,3,5-trimethylcyclohexane-1,1-diyl)diphenol.

17. The flame element of claim 4, wherein the fuel is at least one of the following:

oil and wax.

19. The flame element of claim 4, wherein the UL94 rating of V0 is at a thickness of 2.5 mm.

20. The flame element of claim 19, wherein the transmission is greater than or equal to 80% at 3.2 mm.

21. The flame element of claim 20, wherein the second polycarbonate is bisphenol-A polycarbonate.

22. The flame element of claim 19, wherein the polycarbonate blend further comprises 0.01 wt % to 1.0 wt % flame retardant additive, based on 100 parts by weight of the polymer component of the thermoplastic composition.

23. The flame element of claim 22, wherein the polycarbonate blend comprises 0.7 wt % to 0.9 wt % flame retardant additive, based on 100 parts by weight of the polymer component of the thermoplastic composition.

24. The flame element of claim 22, wherein the flame retardant phosphorus containing compound is at least one of the following:

triphenylphosphate, tricresylphosphate, resorcinol bis(diphenylphosphate), tris(nonyl)phenylphosphate, and BPA diphosphate.

25. The flame element of claim 22, wherein the flame retardant is at least one of the following:

potassium perfluorobutane sulfonate and siloxane.

26. The flame element of claim 25, wherein the flame retardant comprises potassium perfluorobutane sulfonate and octaphenylcyclotetrasiloxane.

27. The flame element of claim 22, wherein the flame retardant comprises potassium perfluorobutane sulfonate, linear phenyl containing siloxane, and cyclic phenyl containing siloxane.

16. A flame element, comprising:

a flame housing formed from a polycarbonate blend comprising

a polycarbonate, and

a 2-phenyl-3,3-bis(4-hydroxyphenyl)phthalimidine/BPA polycarbonate copolymer in an amount greater than 50 wt % of a total weight of the blend,

wherein the polycarbonate blend is free of a flame retardant phosphorous containing compound, and has at least a UL94 V0 fire rating at a plaque thickness of 3 mm,

wherein the polycarbonate and the 2-phenyl-3,3-bis(4-hydroxyphenyl)phthalimidine/BPA polycarbonate copolymer are different, and wherein the 2-phenyl-3,3-bis(4-hydroxyphenyl)phthalimidine/BPA polycarbonate copolymer has a yellowness index of less than 10 as measured on a 3.2 mm thick plaque in accordance with ASTM D1925;

a fuel located in the flame housing; and

a medium for a flame located in the housing and in contact with the fuel.