HIGH FLOW, DUCTILE POLY(ALIPHATIC ESTER-CARBONATE) COMPOSITIONS

• US 20190330468A1
• Filed: 12/22/2017
• Published: 10/31/2019
• Est. Priority Date: 12/30/2016
• Status: Abandoned Application

• Current Assignee: SHPP Global Technologies BV
• Original Assignee: SABIC Global Technologies BV (Government of Saudi Arabia)
• Inventors: XU, Yuzhen, HAN, Xue, ZHOU, Hiker
• Application Number:
  US16/473,524
• Publication Number:
  US 20190330468A1
• Time in Patent Office: Days
• CPC Class Codes: C08K 5/0025 Crosslinking or vulcanising agents; including accelerators
• CPC Class Codes: C08K 5/005 Stabilisers against oxidation, heat, light, ozone
• CPC Class Codes: C08K 5/103 with polyalcohols
• CPC Class Codes: C08L 2312/00 Crosslinking
• CPC Class Codes: C08L 69/005 Polyester-carbonates
• CPC Class Codes: C08L 83/04 Polysiloxanes

Abstract

A thermoplastic composition, comprising, based on the total weight of the composition: 15 to 90 weight percent of a first poly(aliphatic ester-carbonate) having a first weight average molecular weight; 10 to 85 weight percent of a second poly(aliphatic ester-carbonate) having a second weight average molecular weight that is lower than the first weight average molecular weight; 0.01 to 0.5 weight percent of a mold release agent; 0.01 to 0.5 weight percent of a thermal stabilizer; 0.01 to 0.5 weight percent of a chain extender; San average melt volume flow rate of less than 40 cubic centimeters per 10 minutes when measured at 300° C. at a shear load of 1.2 kg, and an average melt volume flow rate of less than 40 cubic centimeters per 10 minutes when measured at 250° C. at a shear load of 5.0 kg.

Claims

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

15 to 90 weight percent of a first poly(aliphatic ester-carbonate) having a first weight average molecular weight;

10 to 85 weight percent of a second poly(aliphatic ester-carbonate) having a second weight average molecular weight that is lower than the first weight average molecular weight;

0.01 to 0.5 weight percent of a mold release agent;

0.01 to 0.5 weight percent of a thermal stabilizer; and

0.01 to 0.5 weight percent of a chain extender,

wherein the foregoing amounts total 100 weight percent, and are based on the total weight of the thermoplastic composition, and

wherein the thermoplastic composition has

an average melt volume flow rate of less than 40 cubic centimeters per 10 minutes when measured at 300°

C. at a shear load of 1.2 kg, dwell 300 seconds, in accordance with ASTM 1238, and

an average melt volume flow rate of less than 40 cubic centimeters per 10 minutes when measured at 250°

C. at a shear load of 5.0 kg, dwell 300 seconds, in accordance with ASTM 1238.

2. The composition of claim 1, wherein the composition is embossable at a temperature that is at least 5°

C. lower than the same composition further comprising an unbranched bisphenol A homopolycarbonate, when measured at a line speed of 0.5 meters per minute.

3. The composition of claim 1, wherein the composition has:

a notched Izod impact strength of greater than 750 Joules per meter when measured on a sample bar molded from the composition and having a thickness of 3.2 millimeters, in accordance with ASTM D256,

a tensile modulus of elasticity of greater than 2,000 megapascals when measured in accordance with ASTM D638,

a tensile stress at yield of greater than 50 megapascals when measured in accordance with ASTM D638,

a tensile elongation at break of greater than 80% when measured in accordance with ASTM D638, and

a heat deflection temperature of greater than or equal to 108°

C., when measured on a sample bar molded from the composition and having a thickness of 3.2 millimeters in accordance with ASTM D648.

4. The composition of claim 1, wherein

a weight average molecular weight of the first poly(aliphatic ester-carbonate) is 50,000 to 80,000 grams per mole when measured by gel permeation chromatography using bisphenol A homopolycarbonate standards, and

a weight average molecular weight of the second poly(aliphatic ester-carbonate) is 30,000 to 50,000 grams per mole when measured by gel permeation chromatography using bisphenol A homopolycarbonate standards.

5. The composition of claim 4, wherein

aliphatic ester units in the first and the second poly(aliphatic ester-carbonate) are each derived from sebacic acid, and are present in each poly(aliphatic ester-carbonate) independently in an amount of 5 to 10 mole percent, based on 100 mole percent of each poly(aliphatic ester-carbonate), and

the carbonate units are derived from bisphenol A.

6. The composition of claim 1, wherein the mold release agent is glycerol monostearate, pentaerythritol tetrastearate, or a combination thereof.

7. The composition of claim 1, further comprising:

10 to 30 weight percent of a branched homopolycarbonate;

or

10 to 30 weight percent of a polycarbonate-polysiloxane copolymer.

8. The composition of claim 1, comprisingto 80 weight percent of the first poly(aliphatic ester-carbonate);

10 to 80 weight percent of the second poly(aliphatic ester-carbonate);

0 to 50 weight percent of a branched bisphenol A homopolycarbonate;

0.01 to 0.5 weight percent of the mold release agent; and

0.01 to 8 weight percent of a light stabilizer,

wherein the composition has an average melt volume flow rate of less than 15 cubic centimeters per 10 minutes when measured at 300°

C. at a shear load of 1.2 kg, dwell 300 seconds, in accordance with ASTM 1238.

9. The composition of claim 1, comprisingto 35 weight percent of the first poly(aliphatic ester-carbonate);

40 to 75 weight percent of the second poly(aliphatic ester-carbonate);

10 to 30 weight percent of a branched bisphenol A homopolycarbonate;

0.1 to 0.5 weight percent of the mold release agent; and

0.01 to 8 weight percent of a light stabilizer,

wherein the composition has an average melt volume flow rate of less than 15 cubic centimeters per 10 minutes when measured at 300°

C. at a shear load of 1.2 kg, dwell 300 seconds, in accordance with ASTM 1238.

10. The composition of claim 1, comprisingto 90 weight percent of the first poly(aliphatic ester-carbonate);

10 to 40 weight percent of the second poly(aliphatic ester-carbonate);

0.01 to 0.5 weight percent of the mold release agent; and

0.01 to 8 weight percent of a light stabilizer,

wherein the composition has an average melt volume flow rate of less than 10 cubic centimeters per 10 minutes when measured at 300°

C. at a shear load of 1.2 kg, 360 seconds, in accordance with ASTM 1238.

12. A method for the manufacture of a layer comprising the composition of claim 1, the method comprising:

melt blending the first poly(aliphatic ester-carbonate), the second poly(aliphatic ester-carbonate), the mold release agent, the thermal stabilizer, and the chain extender to provide the composition; and

extruding the composition to form the layer.

13. The method of claim 12, wherein the layer has a thickness of 2 to 5,000 micrometers.

14. The method of claim 12, further comprising thermally embossing the layer at a line speed line speed of 0.45 meters per minute to 0.7 meters per minute, at 235°

C. to 255°

C.

15. An article comprising the composition of claim 1.

16. The article of claim 15, wherein the article is an embossed layer.

17. The composition of claim 1, comprisingto 80 weight percent of the first poly(aliphatic ester-carbonate) having a weight average molecular weight of 60,000 to 80,000 grams per mole, when measured by gel permeation chromatography using bisphenol A homopolycarbonate standards;

20 to 65 weight percent of the second poly(aliphatic ester-carbonate) having a weight average molecular weight of 35,000 to 50,000 grams per mole, when measured by gel permeation chromatography using bisphenol A homopolycarbonate standards; and

0.05 to 0.3 weight percent of glycerol monostearate.

18. The composition of claim 1, comprisingto 60 weight percent of the first poly(aliphatic ester-carbonate) having a weight average molecular weight of 60,000 to 80,000 grams per mole, when measured by gel permeation chromatography using bisphenol A homopolycarbonate standards;

40 to 70 weight percent of the second poly(aliphatic ester-carbonate) having a weight average molecular weight of 35,000 to 50,000 grams per mole, when measured by gel permeation chromatography using bisphenol A homopolycarbonate standards; and

10 to 40 weight percent of a branched bisphenol A homopolycarbonate.

19. The composition of claim 1, comprisingto 60 weight percent of the first poly(aliphatic ester-carbonate) having a weight average molecular weight of 60,000 to 80,000 grams per mole, when measured by gel permeation chromatography using bisphenol A homopolycarbonate standards;

40 to 70 weight percent of the second poly(aliphatic ester-carbonate) having a weight average molecular weight of 35,000 to 50,000 grams per mole, when measured by gel permeation chromatography using bisphenol A homopolycarbonate standards; and

10 to 40 weight percent of a polycarbonate-polysiloxane copolymer.

20. The composition of claim 1, wherein the composition has:

a notched Izod impact strength of greater than 800 Joules per meter, when measured on a sample bar molded from the composition and having a thickness of 3.2 millimeters, in accordance with ASTM D256,

a tensile modulus of elasticity of greater than 2,100 megapascals, when measured in accordance with ASTM D638,

a tensile stress at yield of greater than 55 megapascals, when measured in accordance with ASTM D638,

a tensile elongation at break of greater than 90%, when measured in accordance with ASTM D638, and

a heat deflection temperature of greater than or equal to 110°

C., when measured on a sample bar molded from the composition and having a thickness of 3.2 millimeters in accordance with ASTM D648.

11. (canceled)