Polymer composition, molded article, and method of manufacturing the molded article

Patent metadata

Field	Value
Publication number	US-10240036-B2
Application number	US-201514883739-A
Country	US
Kind code	B2
Filing date	Oct 15, 2015
Priority date	Apr 30, 2015
Publication date	Mar 26, 2019
Grant date	Mar 26, 2019

Abstract

An eco-friendly fire-retardant polymer composition, a molded article made from the composition, and a method of manufacturing the molded article. The composition includes: a thermoplastic resin containing polycarbonate; a bio-based resin containing polytrimethylene terephthalate extracted from a biomaterial; and an impact modifier containing a core-shell type elastomer.

First claim

What is claimed is:

1. A polymer composition comprising:
40 to 60 wt % with respect to the weight of the polymer composition, of polycarbonate resin having a Melt Index exceeding 10 g/10 min at 300° C. and 1.2 kg;
20 to 30 wt % with respect to the weight of the polymer composition, of polycarbonate having a Melt Index of 10 q/10 min or less at 300° C. and 1.2 kg;
5 to 20 wt % of a polysiloxane-polycarbonate resin with respect to the weight of the polymer composition;
3 to 15 parts of weight (wt %) of a bio-based resin with respect to the weight of the polymer composition, the bio-based resin containing polytrimethylene terephthalate produced from a biomaterial; and
an impact modifier containing a core-shell type elastomer.

2. The polymer composition according to claim 1 , wherein the biomaterial is extracted from a plant.

3. The polymer composition according to claim 1 , wherein the polytrimethylene terephthalate includes radiocarbon C14.

4. The polymer composition according to claim 1 , comprising:
3 to 10 wt % of the impact modifier with respect to the weight of the polymer composition.

5. The polymer composition according to claim 1 , wherein the polysiloxane-polycarbonate resin includes a siloxane block.

6. The polymer composition according to claim 1 , wherein the core of the core-shell type elastomer includes a silicon and acrylic copolymer, and a shell of the core-shell type elastomer includes polymethylmethacrylate.

7. The polymer composition according to claim 1 , having V2 grade or more defined in the Underwriter's Laboratory 94 , Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, Edition Number 6 .

8. The polymer composition according to claim 1 , having a Melt Index of 10 g/10 min or more at 300° C. and 1.2 kg.

9. The polymer composition according to claim 1 , having an Izod Notched Impact Strength of 70 kgfcm/cm or more.

10. A method of manufacturing a molded article, comprising:
mixing the polymer composition according to claim 1 ; extracting the polymer composition and
injection-molding the polymer composition to form the article.

11. The method according to claim 10 , further comprising extruding the polymer composition.

12. The method according to claim 11 , wherein the extruding of the polymer composition comprises:
melting the polymer composition; and
applying shear stress to the polymer composition to disperse the polymer composition.

13. The method according to claim 10 , wherein the method further comprises:
supplying a surface modifier containing siloxane copolyester to the polymer composition; and
separately supplying a stiffener containing a glass fiber to the polymer composition.

14. The method according to claim 13 , wherein the surface modifier is supplied via a front feeder, and the stiffener is supplied via a second feeder.

15. The polymer composition according to claim 1 , wherein the polymer composition comprises:
40 to 47 wt % with respect to the weight of the polymer composition, of polycarbonate resin having a Melt Index exceeding 10 g/10 min at 300° C. and 1.2 kg;
20 to 27 wt % with respect to the weight of the polymer composition, of polycarbonate having a Melt Index of 10 g/10 min or less at 300° C. and 1.2 kg; and
5 to 20 wt % of a polysiloxane-polycarbonate resin with respect to the weight of the polymer composition.

16. The polymer composition according to claim 1 , wherein the polymer composition comprises:
42 to 60 wt % with respect to the weight of the polymer composition, of polycarbonate resin having a Melt Index exceeding 10 g/10 min at 300° C. and 1.2 kg;
27 to 30 wt % with respect to the weight of the polymer composition, of polycarbonate having a Melt Index of 10 g/10 min or less at 300° C. and 1.2 kg; and
5 to 20 wt % of a polysiloxane-polycarbonate resin with respect to the weight of the polymer composition.

17. The polymer composition according to claim 1 , wherein the polymer composition comprises:
42 to 47 wt % with respect to the weight of the polymer composition, of polycarbonate resin having a Melt Index exceeding 10 g/10 min at 300° C. and 1.2 kg;
20 to 30 wt % with respect to the weight of the polymer composition, of polycarbonate having a Melt Index of 10 g/10 min or less at 300° C. and 1.2 kg; and
15 to 20 wt % of a polysiloxane-polycarbonate resin with respect to the weight of the polymer composition.

18. A molded article manufactured with a polymer composition, the polymer composition comprising:
40 to 60 wt % with respect to the weight of the polymer composition, of polycarbonate resin having a Melt Index exceeding 10 g/10 min at 300° C. and 1.2 kg,
20 to 30 wt % with respect to the weight of the polymer composition, of polycarbonate having a Melt Index of 10 g/10 min or less at 300° C. and 1.2 kg,
5 to 20 wt % of a polysiloxane-polycarbonate resin with respect to the weight of the polymer composition,
3 to 15 parts of weight (wt %) of a bio-based resin with respect to the weight of the polymer composition, the bio-based resin containing polytrimethylene terephthalate produced with a biomaterial, and
an impact modifier containing a core-shell type elastomer.

19. The molded article according to claim 18 , wherein
the polymer composition further comprises a stiffener containing a glass fiber, and
a surface modifier containing siloxane copolyester.

20. The molded article according to claim 18 , including materials of an electronic product.

21. The molded article according to claim 20 , wherein
the electronic product includes a smart device, and
the materials include a rear cover, a front cover, a front decoration, a home key, a side key, or a battery cover of the smart device.

22. The molded article according to claim 20 , wherein the electronic device includes a display apparatus, a computer, a tablet Personal Computer, a printer, a multifunction printer, a refrigerator, a washing machine, an air conditioner, a robot cleaner, a camera, an E-book, an E-paper, 3-dimensional glasses, or a charger.

23. The molded article according to claim 18 , wherein the polymer composition comprises:
40 to 47 wt % with respect to the weight of the polymer composition, of polycarbonate resin having a Melt Index exceeding 10 g/10 min at 300° C. and 1.2 kg;
20 to 27 wt % with respect to the weight of the polymer composition, of polycarbonate having a Melt Index of 10 g/10 min or less at 300° C. and 1.2 kg; and
5 to 20 wt % of a polysiloxane-polycarbonate resin with respect to the weight of the polymer composition.

24. The molded article according to claim 18 , wherein the polymer composition comprises:
42 to 60 wt % with respect to the weight of the polymer composition, of polycarbonate resin having a Melt Index exceeding 10 g/10 min at 300° C. and 1.2 kg;
27 to 30 wt % with respect to the weight of the polymer composition, of polycarbonate having a Melt Index of 10 g/10 min or less at 300° C. and 1.2 kg; and
5 to 20 wt % of a polysiloxane-polycarbonate resin with respect to the weight of the polymer composition.

25. The molded article according to claim 18 , wherein the polymer composition comprises:
42 to 47 wt % with respect to the weight of the polymer composition, of polycarbonate resin having a Melt Index exceeding 10 g/10 min at 300° C. and 1.2 kg;
20 to 30 wt % with respect to the weight of the polymer composition, of polycarbonate having a Melt Index of 10 g/10

Assignees

• Samsung Electronics Co Ltd

Inventors

• Hyun Song Won
• Kim In
• Pang Kyeong

Classifications

• B29C47/0011

  Operations & Transport · mapped topic

• B29K2105/06

  containing reinforcements, fillers or inserts · CPC title

• B29B7/42

  with screw or helix · CPC title

• B29C47/0801

  Operations & Transport · mapped topic

• B29B7/007

  for continuous mixing · CPC title