THERMOPLASTIC POLYCARBONATE/POLYESTER BLEND COMPOSITIONS WITH IMPROVED MECHANICAL PROPERTIES

• US 20090209695A1
• Filed: 02/20/2008
• Published: 08/20/2009
• Est. Priority Date: 02/20/2008
• Status: Active Grant

• Current Assignee: SABIC Global Technologies BV (Government of Saudi Arabia)
• Original Assignee: Sabic Innovative Plastics IP BV (Government of Saudi Arabia)
• Inventors: Yu, Ren, Zhang, Jing, Sun, Tong, Yao, Wayne, Qu, Zhaohui
• Granted Patent: US 8,071,694 B2
• Time in Patent Office: Days
• US Class Current: 524/451
• CPC Class Codes: C08K 3/34 Silicon-containing compounds
• CPC Class Codes: C08K 5/29 Compounds containing one or more carbon-to-nitrogen double bonds
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/18 Polyesters or polycarbonates according to C08L67/00 - C08L69/00; Derivatives thereof
• CPC Class Codes: C08L 51/04 grafted on to rubbers
• CPC Class Codes: C08L 55/02 ABS [Acrylonitrile-Butadiene-Styrene] polymers
• CPC Class Codes: C08L 67/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds C08L67/06 takes precedence
• CPC Class Codes: C08L 67/04 Polyesters derived from hydroxycarboxylic acids, e.g. lactones C08L67/06 takes precedence
• CPC Class Codes: C08L 69/00 Compositions of polycarbonates; Compositions of derivatives of polycarbonates

Abstract

Disclosed is a thermoplastic composition comprising a mixture of from 10 to 98 weight % of a polycarbonate polymer, from 2 to 90 weight % of a polyester polymer comprising structures derived from a diol compound having the structure (A) HO-Z-OH, wherein Z is a C₁ to C₃₆ linear aliphatic radical, a C₃ to C₃₆ branched aliphatic or cycloaliphatic radical, a C₆ to C₃₆ aryl radical, or a C₇ to C₃₆ alkylaryl radical, and a diacid compound having the structure (B) HOOC—CH₂CH₂—COOH, from 0 to 5 weight % of a polylactic acid polymer, wherein the sum of the polycarbonate polymer, the polyester polymer, and the polylactic acid polymer is equal to 100 weight %. The thermoplastic composition has improved mechanical properties.

Claims

1. A thermoplastic composition comprising:

a mixture of

i) from 10 to 98 weight % of a polycarbonate polymer,

ii) from 2 to 90 weight % of a polyester polymer comprising structures derived from a diol compound having the structure (A) HO-Z-OH, wherein Z is a C₁ to C₃₆ linear aliphatic radical, a C₃ to C₃₆ branched aliphatic or cycloaliphatic radical, a C₆ to C₃₆ aryl radical, or a C₇ to C₃₆ alkylaryl radical, and a diacid compound having the structure (B) HOOC—

CH₂CH₂—

COOH, and

iii) from 0 to 5 weight % of a polylactic acid polymer,

wherein the sum of the polycarbonate polymer, the polyester polymer, and the polylactic acid polymer is equal to 100 weight %.

2. The thermoplastic composition of claim 1, wherein Z is a C₂ to C₆ linear aliphatic radical, a C₃ to C₆ branched or cyclo-aliphatic radical, or a combination thereof.

3. The thermoplastic composition of claim 1, wherein the polyester polymer is polybutylene succinate.

4. The thermoplastic composition of claim 1, wherein the mixture contains from 5 to 40 weight % of the polyester polymer.

5. The thermoplastic composition of claim 1, wherein the mixture contains 0 weight % polylactic acid polymer.

6. The thermoplastic composition of claim 1, wherein the thermoplastic composition further comprises a filler.

7. The thermoplastic composition of claim 6, wherein the filler is talc, glass fiber, natural fiber or a combination of two or more of the foregoing fillers.

8. The thermoplastic composition of claim 1, wherein the thermoplastic composition further comprises an additive,

wherein the additive is a quencher, a flow promoter, an antioxidant, a heat stabilizer, an anti-hydrolysis stabilizer, a light stabilizer, an UV absorber, a plasticizer, a lubricant, a mold release agent, an anti-static agent, a pigment, a dye, a flame retardant, an anti-drip agent, a blowing agent, or a combination of two or more of the foregoing additives.

9. A thermoplastic composition comprising:

a mixture of

i) from 10 to 98 weight % of a polycarbonate polymer,

ii) from 2 to 90 weight % of a polyester polymer comprising structures derived from a diol compound having the structure (A) HO-Z-OH, wherein Z is a C₁ to C₃₆ linear aliphatic radical, a C₃ to C₃₆ branched aliphatic or cycloaliphatic radical, a C₆ to C₃₆ aryl radical, or a C₇ to C₃₆ alkylaryl radical, and a diacid compound having the structure (B) HOOC—

CH₂CH₂—

COOH,

iii) from 0 to 5 weight % of a polylactic acid polymer, and

iv) from 0 to 30 weight % of a filler,

wherein the sum of the polycarbonate polymer, the polyester polymer, the polylactic acid polymer, and the filler is equal to 100 weight %.

10. The thermoplastic composition of claim 9, wherein Z is a C₂ to C₆ linear aliphatic radical, a C₃ to C₆ branched or cyclo-aliphatic radical, or a combination thereof.

11. The thermoplastic composition of claim 9, wherein the polyester polymer is polybutylene succinate.

12. The thermoplastic composition of claim 9, wherein the mixture contains from 5 to 15 weight % of the polyester polymer and from 5 to 15 weight % of the filler.

13. The thermoplastic composition of claim 9, wherein the filler is talc, glass fiber, natural fiber or a combination of two or more of the foregoing fillers.

14. The thermoplastic composition of claim 9, wherein the thermoplastic composition further comprises an additive,

wherein the additive is a quencher, a flow promoter, an antioxidant, a heat stabilizer, an anti-hydrolysis stabilizer, a light stabilizer, an UV absorber, a plasticizer, a lubricant, a mold release agent, an anti-static agent, a pigment, a dye, a flame retardant, an anti-drip agent, a blowing agent, or a combination of two or more of the foregoing additives.

15. A thermoplastic composition comprising:

a mixture of

i) from 10 to 98 weight % of a polycarbonate polymer,

ii) from 2 to 90 weight % of a polyester polymer comprising structures derived from a diol compound having the structure (A) HO-Z-OH, wherein Z is a C₁ to C₃₆ linear aliphatic radical, a C₃ to C₃₆ branched aliphatic or cycloaliphatic radical, a C₆ to C₃₆ aryl radical, or a C₇ to C₃₆ alkylaryl radical, and a diacid compound having the structure (B) HOOC—

CH₂CH₂—

COOH,

iii) from 0 to 5 weight % of a polylactic acid polymer,

iv) from 0 to 30 weight % of a filler, and

v) from 0 to 30 weight % of an impact modifier,

wherein the sum of the polycarbonate polymer, the polyester polymer, the polylactic acid polymer, the filler, and the impact modifier is equal to 100 weight %.

16. The thermoplastic composition of claim 15, wherein Z is a C₂ to C₆ linear aliphatic radical, a C₃ to C₆ branched or cyclo-aliphatic radical, or a combination thereof.

17. The thermoplastic composition of claim 15, wherein the polyester polymer is polybutylene succinate.

18. The thermoplastic composition of claim 15, wherein the filler is talc, glass fiber, natural fiber or a combination of two or more of the foregoing fillers.

19. The thermoplastic composition of claim 15, wherein the mixture contains from 5 to 15 weight % of the polyester polymer and from 5 to 15 weight % of the filler.

20. The thermoplastic composition of claim 15, wherein the impact modifier is ABS, MBS, ASA, polycarbonate-polysiloxane copolymer, or a combination of two or more of the foregoing impact modifiers.

21. A thermoplastic composition consisting essentially of:

a mixture of

i) from 10 to 98 weight % of a polycarbonate polymer,

ii) from 2 to 90 weight % of a polyester polymer comprising structures derived from a diol compound having the structure (A) HO-Z-OH, wherein Z is a C₁ to C₃₆ linear aliphatic radical, a C₃ to C₃₆ branched aliphatic or cycloaliphatic radical, a C₆ to C₃₆ aryl radical, or a C₇ to C₃₆ alkylaryl radical, and a diacid compound having the structure (B) HOOC—

CH₂CH₂—

COOH,

iii) from 0 to 30 weight % of a filler,

iv) from 0 to 30 weight % of an impact modifier,

v) from 0 to 20 weight % of an additive,

wherein the additive is a quencher, a flow promoter, an antioxidant, a heat stabilizer, an anti-hydrolysis stabilizer, a light stabilizer, an UV absorber, a plasticizer, a lubricant, a mold release agent, an anti-static agent, a pigment, a dye, a flame retardant, an anti-drip agent, a blowing agent, or a combination of two or more of the foregoing additives,

and wherein the sum of the polycarbonate polymer, the polyester polymer, the filler, the impact modifier, and the additive is equal to 100 weight %.

22. The thermoplastic composition of claim 21, wherein the mixture contains from 5 to 15 weight % of the polyester polymer.