POLYESTER-POLYCARBONATE COMPOSITION AND ARTICLE

• US 20150240074A1
• Filed: 02/27/2014
• Published: 08/27/2015
• Est. Priority Date: 02/27/2014
• 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: Chen, Lin, Guan, Bing, Wang, Huanbing, Wan, Shun, Shen, Dake, Xing, Dongbo
• Application Number:
  US14/191,488
• Publication Number:
  US 20150240074A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: C08G 77/448 containing polycarbonate sequences
• CPC Class Codes: C08K 5/523 with hydroxyaryl compounds
• CPC Class Codes: C08L 2201/02 Flame or fire retardant/resistant
• CPC Class Codes: C08L 2201/08 Stabilised against heat, light or radiation or oxydation
• CPC Class Codes: C08L 2205/025 containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
• CPC Class Codes: C08L 2205/035 containing four or more polymers in a blend
• CPC Class Codes: C08L 2207/53 Core-shell polymer
• CPC Class Codes: C08L 67/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds C08L67/06 takes precedence
• CPC Class Codes: C08L 69/00 Compositions of polycarbonates; Compositions of derivatives of polycarbonates
• CPC Class Codes: C08L 69/005 Polyester-carbonates
• CPC Class Codes: C08L 83/10 Block- or graft-copolymers containing polysiloxane sequences obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C08L51/08, C08L53/00

Abstract

A composition includes specific amounts of an aromatic polycarbonate, a block polycarbonate-polysiloxane, a poly(alkylene terephthalate), a block polyestercarbonate, and an organophosphate ester. Relative to a corresponding composition lacking the block polyestercarbonate, the composition exhibits improved solvent resistance while substantially maintaining impact strength, melt flow, and flame retardancy. The composition is useful for fabricating articles that may come into contact with liquid chemicals or chemical vapors.

Claims

1. A composition comprising, based on the total weight of the composition:

5 to 50 weight percent of an aromatic polycarbonate;

10 to 40 weight percent of a block polycarbonate-polysiloxane;

5 to 35 weight percent of a poly(alkylene terephthalate);

5 to 50 weight percent of a block polyestercarbonate comprising

a polyester block comprising resorcinol ester repeat units having the structure

2. The composition of claim 1, wherein the aromatic polycarbonate comprises repeat units having the structure

3. The composition of claim 1, wherein the aromatic polycarbonate comprises repeat units having the structure

4. The composition of claim 1, wherein the block polycarbonate-polysiloxane comprises a polycarbonate block comprising repeat units having the structure

5. The composition of claim 1, wherein the block polycarbonate-polysiloxane comprises, based on the weight of the block polycarbonate-polysiloxane, 70 to 90 weight percent of carbonate units of the formula

6. The composition of claim 1, wherein the poly(alkylene terephthalate) comprises alkylene groups comprising ethylene, 1,3-propylene, 1,4-butylene, 1,5-pentylene, 1,6-hexylene, 1,4-cyclohexylene, 1,4-cyclohexanedimethylene, or a combination thereof.

7. The composition of claim 1, wherein the poly(alkylene terephthalate) comprises poly(butylene terephthalate).

8. The composition of claim 1, wherein the polyester block comprises resorcinol ester repeat units having the structures

9. The composition of claim 1, comprising 0 to 1 weight percent of impact modifiers.

10. The composition of claim 1, comprising 0 to 1 weight percent of reinforcing fillers.

11. The composition of claim 1, comprising 0 to 1 weight percent of any polymer other than the aromatic polycarbonate, the block polycarbonate-polysiloxane, the poly(alkylene terephthalate), the block polyestercarbonate, and, optionally, up to 2 weight percent of a poly(styrene-acrylonitrile)-encapsulated polytetrafluoroethylene.

12. The composition of claim 1, comprisingto 36 weight percent of the aromatic polycarbonate,to 30 weight percent of the block polycarbonate-polysiloxane,to 25 weight percent of the poly(alkylene terephthalate),to 35 weight percent of the block polyestercarbonate, and

5 to 12 weight percent of the organophosphate ester.

13. The composition of claim 1,

wherein the aromatic polycarbonate comprises repeat units having the structure

14. An article comprising a composition comprising, based on the total weight of the composition:

5 to 50 weight percent of an aromatic polycarbonate;

10 to 40 weight percent of a block polycarbonate-polysiloxane;

5 to 35 weight percent of a poly(alkylene terephthalate);

5 to 50 weight percent of a block polyestercarbonate comprising

a polyester block comprising resorcinol ester repeat units having the structure

15. The article of claim 14, wherein the article is selected from a component of a household appliance, a component of office equipment, and a component of a consumer electronic device.

16. The article of claim 14,

wherein the aromatic polycarbonate comprises repeat units having the structure