High heat polycarbonate compositions including recycled thermoplastic content

Patent metadata

Field	Value
Publication number	US-11912864-B2
Application number	US-202017423213-A
Country	US
Kind code	B2
Filing date	Jan 17, 2020
Priority date	Jan 17, 2019
Publication date	Feb 27, 2024
Grant date	Feb 27, 2024

Abstract

Thermoplastic compositions include: (a) from about 20 wt % to about 50 wt % post-consumer recycled polycarbonate (PCR-PC); (b) from about 5 wt % to about 25 wt % of a filler component; (c) from about 4 wt % to about 7 wt % of a phosphazene component; (d) from about 20 wt % to about 65 wt % of a polycarbonate copolymer component; and (e) from about 1 wt % to about 20 wt % one or more additional components. The polycarbonate copolymer component includes bisphenol-A and a monomer comprising one or more of 3,3-Bis(4-hydroxyphenyl)-2-phenyl-2,3-dihydro-isoindol-1-one (PPPBP), 4-4-(3-3-5 trimethylcyclohexane-1-ldiyl)diphenol (BPI), 4,4′-(1-Methyl Ethyl) 1-3-cyclohexandiyl) Bis-Phenol (BHPM), 1,1-Bis(4-hydroxy-3-methyl phenyl) cyclohexane (DMBPC); 4-[1-(4-hydroxyphenyl)cyclododecyl]phenol (Red Cross), bisphenol based on cyclooctadiene, bisphenol based on isophorone nitrile, and combinations thereof. The thermoplastic composition exhibits improved heat properties, including but not limited to heat deflection temperature.

First claim

The invention claimed is:

1. A thermoplastic composition comprising:
(a) from about 20 wt % to about 50 wt % post-consumer recycled polycarbonate (PCR-PC);
(b) from about 5 wt % to about 25 wt % of a filler component;
(c) from about 4 wt % to about 7 wt % of a phosphazene component;
(d) from about 20 wt % to about 65 wt % of a polycarbonate copolymer component comprising bisphenol-A and a monomer comprising one or more of 3,3-Bis(4-hydroxyphenyl)-2-phenyl-2,3-dihydro-isoindol-1-one (PPPBP), 4-4-(3-3-5 trimethylcyclohexane-1-1diyl)diphenol (BPI), 4,4′-(1-Methyl Ethyl) 1-3-cyclohexandiyl) Bis-Phenol (BHPM), 1,1-Bis(4-hydroxy-3-methyl phenyl) cyclohexane (DMBPC); 4-[1-(4-hydroxyphenyl)cyclododecyl]phenol (Red Cross), and combinations thereof; and
(e) from about 1 wt % to about 20 wt % one or more additional components.

2. The thermoplastic composition according to claim 1 , wherein the thermoplastic composition comprises a heat deflection temperature as measured in accordance with ASTM D648 using a 3.2 millimeter (mm) sample at a load of 0.45 megapascals (MPa) that is at least about 10 degrees Celsius (° C.) higher than that of a substantially identical thermoplastic composition that does not include the polycarbonate copolymer component.

3. The thermoplastic composition according to claim 1 , wherein the thermoplastic composition comprises a heat deflection temperature of at least about 130° C. as measured in accordance with ASTM D648 using a 3.2 mm sample at a load of 0.45 MPa.

4. The thermoplastic composition according to claim 1 , wherein the thermoplastic composition comprises a UL94 flammability rating of V0 when exposed to short-term conditioning conditions.

5. The thermoplastic composition according to claim 1 , wherein the filler component comprises glass fibers.

6. The thermoplastic composition according to claim 1 , wherein the composition comprises from about 10 wt % to about 20 wt % of the filler component.

7. The thermoplastic composition according to claim 1 , wherein the composition comprises about 5 wt % of the phosphazene component.

8. The thermoplastic composition according to claim 1 , wherein the one or more additional components comprise a polycarbonate-siloxane copolymer.

9. The thermoplastic composition according to claim 1 , wherein the one or more additional components comprise a transparent and flame resistant polycarbonate copolymer.

10. The thermoplastic composition according to claim 1 , wherein the one or more additional components comprise an anti-drip component.

11. The thermoplastic composition according to claim 1 , wherein the one or more additional components comprise an additional flame retardant component.

12. The thermoplastic composition according to claim 1 , wherein the one or more additional components is selected from the group consisting of: a pigment; a whitening agent; an optical brightener; a surfactant; a processing aid; a thermal stabilizer; a photochemical stabilizer; a mold-release agent; an antioxidant; and combinations thereof.

13. An article comprising the thermoplastic composition according to claim 1 .

14. The article according to claim 13 , wherein the article is a component of a consumer electronics device.

Assignees

• Shpp Global Tech Bv

Inventors

• Ziegler Christopher Ryan
• Vollenberg Peter

Classifications

• C08L69/00 Primary

  Compositions of polycarbonates; Compositions of derivatives of polycarbonates · CPC title

• C08K5/5399

  Phosphorus bound to nitrogen · CPC title

• C08K7/14

  Glass · CPC title

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title

• C08L2205/035

  containing four or more polymers in a blend · CPC title