Polymer composition, molded article, and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-2017190914-A1
Application number	US-201515314293-A
Country	US
Kind code	A1
Filing date	Mar 26, 2015
Priority date	May 26, 2014
Publication date	Jul 6, 2017
Grant date	—

Abstract

Provided are: a polymer composition, as an eco-friendly material, comprising a post consumer material (PCM) resin and a bio-based resin; a molded article; and a method for manufacturing the same. The polymer composition according to an embodiment comprises a thermoplastic resin containing polycarbonate, a post consumer material (PCM) resin, a bio-based resin, and a core-shell type elastomer.

First claim

1 . A polymer composition comprising:
a thermoplastic resin comprising polycarbonate; a post-consumer material (PCM) resin; a bio-based resin; and a core-shell type elastomer.

2 . The polymer composition according to claim 1 , wherein the bio-based resin comprises at least one selected from the group consisting of poly(cyclohexylene dimethylene terephthalate) glycol (PCTG) and poly(ethylene terephthalate) glycol (PETG).

3 . The polymer composition according to claim 1 , wherein the PCM resin comprises a PCM polycarbonate.

4 . The polymer composition according to claim 1 , wherein the core-shell type elastomer comprises:
a core comprising at least one selected from the group consisting of butadiene and a butylacrylate-styrene copolymer; and a shell comprising polymethylmethacrylate (PMMA).

5 . The polymer composition according to claim 1 , wherein the thermoplastic resin comprises at least one selected from the group consisting of a low molecular weight polycarbonate and a high molecular weight polycarbonate.

6 . The polymer composition according to claim 5 , wherein the high molecular weight polycarbonate has a melt index of 45 g/10 min or less (300° C., 1.2 kg), and the molecular weight polycarbonate has a melt index greater than 45 g/10 min (300° C., 1.2 kg).

7 . The polymer composition according to claim 1 , wherein the polymer composition comprises 45 to 60% by weight of the thermoplastic resin, 1 to 20% by weight of the PCM resin, 1 to 20% by weight of the bio-based resin, and 5 to 15% by weight of the core-shell type elastomer.

8 . The polymer composition according to claim 7 , wherein the 45 to 60% by weight of the thermoplastic resin comprises 45 to 55% by weight of the high molecular weight polycarbonate and 0 to 5% by weight of the low molecular weight polycarbonate.

9 . The polymer composition according to claim 1 , wherein the polymer composition has an elongation of 110% or greater.

10 . The polymer composition according to claim 1 , wherein the polymer composition has a flame retardancy level of V2 under the Underwriters Laboratory (UL) 94 standard.

11 . The polymer composition according to claim 1 , wherein the polymer composition has a melt index of 15 g/10 min or greater (300° C., 1.2 kg).

12 . The polymer composition according to claim 1 , wherein the polymer composition has an Izod notched impact strength of 60 kgfcm/cm or greater.

13 . The polymer composition according to claim 1 , wherein the polymer composition has a heat distortion temperature (HDT) of 100° C. or greater.

14 . The polymer composition according to claim 1 , wherein the polymer composition further comprises an additive.

15 . The polymer composition according to claim 14 , wherein the additive comprises at least one selected from the group consisting of a wax, a wax type master batch, a heat stabilizer, a UV stabilizer, an antioxidant stabilizer, a deodorant, and a surface stabilizer.

16 . A method of manufacturing a molded article, the method comprising:
preparing a polymer composition comprising a thermoplastic resin comprising polycarbonate, a post-consumer material (PCM) resin, a bio-based resin, and a core-shell type elastomer by an extruder; and injection-molding the polymer composition by feeding the polymer composition into an injection-molding apparatus.

17 . The method according to claim 16 , wherein the preparing of the polymer composition comprises extruding a composition comprising the thermoplastic resin comprising polycarbonate, the PCM resin, the bio-based resin, and the core-shell type elastomer.

18 . The method according to claim 17 , wherein the extruding of the composition comprises:
melting the composition; and dispersing the composition by applying a shear stress to the composition.

19 . The method according to claim 16 , wherein the extruder comprises at least one selected from the group consisting of a continuous flow single screw extruder and a continuous flow twin screw extruder.

20 . A molded article comprising a polymer composition comprising a thermoplastic resin comprising polycarbonate, a post-consumer material (PCM) resin, a bio-based resin, and a core-shell type elastomer.

21 . The molded article according to claim 20 , wherein the article is molded in the shape of film, sheet, pellet, or fiber.

22 . The molded article according to claim 20 , wherein the molded article comprises an interior material or exterior material of an electronic device.

23 . The molded article according to claim 22 , wherein the electronic device comprises a smart device,
the interior material comprises a rear cover of the smart device, and the exterior material comprises at least one selected from the group consisting of a front cover, a front decoration, a home key, a side key, and a battery cover of the smart device.

24 . The molded article according to claim 20 , wherein the electronic device comprises at least one selected from the group consisting of a display apparatus, a computer, a tablet PC, a printer, a multifunctional apparatus, a refrigerator, a washing machine, an air conditioner, a camera, an E-BOOK, E-Paper, 3D glasses, and a battery charger.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim In
• Hyun Song Won
• Kim Seon Yeong

Classifications

• C08L69/00 Primary

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

• B29B17/00

  Recovery of plastics or other constituents of waste material containing plastics; ({volume reduction of waste plastics, e.g. by mechanical compacting or melting disposal of solid waste B09B;} chemical recovery C08J11/00) · CPC title

• B29C48/00

  Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor (extrusion blow-moulding B29C49/04) · CPC title

• C08L101/16 Primary

  the macromolecular compounds being biodegradable · CPC title

• B29C45/0001 Primary

  characterised by the choice of material · CPC title