Polycarbonate resin composition and molded article manufactured therefrom

Patent metadata

Field	Value
Publication number	US-10100196-B2
Application number	US-201715403826-A
Country	US
Kind code	B2
Filing date	Jan 11, 2017
Priority date	Jan 14, 2016
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

Disclosed are a polycarbonate resin composition including 15 to 93% by weight of a polycarbonate-polyorganosiloxane copolymer; 0 to 70% by weight of a bisphenol-derived polycarbonate resin; 5 to 30% by weight of glass fiber surface-treated with epoxysilane; d) 1 to 5% by weight of a core-shell impact modifier; and e) 0.05 to 3% by weight of an epoxysilane additive and a polycarbonate resin composition, and a molded article manufactured therefrom.
In accordance with the present disclosure, a polycarbonate resin composition and a molded article manufactured therefrom, and more particularly to a polycarbonate resin composition suitable for satisfying demand for larger area and slimmer electronic products, etc. while providing superior rigidity, chemical resistance, and impact resistance and aesthetic appearance, and a molded article manufactured therefrom are provided.

First claim

The invention claimed is:

1. A polycarbonate resin composition, comprising:
a) 15 to 93% by weight of a polycarbonate-polyorganosiloxane copolymer;
b) 0 to 70% by weight of a bisphenol-derived polycarbonate resin;
c) 5 to 30% by weight of glass fiber surface-treated with epoxysilane;
d) 1 to 5% by weight of a core-shell impact modifier; and
e) 0.05 to 3% by weight of an epoxysilane additive which contains 1 to 15 epoxy groups and has a refractive index of 1.45 to 1.65,
wherein the polyorganosiloxane of the polycarbonate-polyorganosiloxane copolymer is one or more selected from the group consisting of compounds represented by Formulas 1 and 2:

wherein X 1 is each independently C 1-10 alkylene; R 5 is each independently hydrogen, C 1-5 alkyl unsubstituted or substituted with oxiranyl, oxiranyl-substitued C 1-10 alkoxy, or C 6-20 aryl, halogen, C 1-10 alkoxy, allyl, C 1-10 haloalkyl, or C 6-20 aryl; and n1 is an integer of 10 to 200,

wherein, X 2 is each independently C 1-10 alkylene; Y 1 is each independently hydrogen, C 1-6 alkyl, a halogen, hydroxy, C 1-6 alkoxy, or C 6-20 aryl; R 6 is each independently hydrogen, C 1-5 alkyl unsubstituted or substituted with oxiranyl, oxiranyl-substituted C 1-10 alkoxy, or C 6-20 aryl-substituted C 1-15 alkyl, halogen, C 1-10 alkoxy, allyl, C 1-10 haloalkyl, or C 6-20 aryl; and n2 is an integer of 10 to 200.

2. The polycarbonate resin composition according to claim 1 , wherein the polycarbonate resin composition comprises a) 15 to 50% by weight of the polycarbonate-polyorganosiloxane copolymer; b) 30 to 70% by weight of the bisphenol-derived polycarbonate resin; c) 5 to 30% by weight of the glass fiber surface-treated with epoxysilane; d) 1 to 5% by weight of the core-shell impact modifier; and e) 0.1 to 1% by weight of the epoxysilane additive.

3. The polycarbonate resin composition according to claim 1 , wherein a) the polycarbonate-polyorganosiloxane copolymer has a viscosity average molecular weight of 18,000 to 30,000 g/mol.

4. The polycarbonate resin composition according to claim 1 , wherein b) the bisphenol-derived polycarbonate resin has a melt index (300° C., 1.2 kg) of 3 to 20 g/10 minutes.

5. The polycarbonate resin composition according to claim 1 , wherein c) the glass fiber has an aspect ratio (δ) of 50 to 200 calculated by Equation 1 below:
δ= L/D   [Equation 1]

wherein L represents a length of glass fiber and D represents a width of glass fiber.

6. The polycarbonate resin composition according to claim 1 , wherein d) the core-shell impact modifier is a silicone-acrylic impact modifier.

7. The polycarbonate resin composition according to claim 1 , wherein a refractive index difference between c) the glass surface-treated with epoxysilane and a) the polycarbonate-polyorganosiloxane copolymer or a mixed resin comprising a) the polycarbonate-polyorganosiloxane copolymer and b) the bisphenol-derived polycarbonate resin is 0.002 or less, and gloss particles or a flame retardant aid or a combination thereof are further comprised as other additives.

8. The polycarbonate resin composition according to claim 1 , wherein the polycarbonate resin composition has a tensile strength of 600 to 1,250 kg/cm 2 .

9. The polycarbonate resin composition according to claim 1 , wherein the polycarbonate resin composition has a flexural strength of 1,000 to 1,800 kg/cm 2 .

10. The polycarbonate resin composition according to claim 1 , wherein the polycarbonate resin composition has a flexural modulus of 30,000 to 80,000 kg/cm 2 .

11. The polycarbonate resin composition according to claim 1 , wherein the polycarbonate resin composition has an impact strength (⅛″) of 15 to 25 kg·cm/cm.

12. A molded article manufactured from the polycarbonate resin composition according to claim 1 .

13. The molded article according to claim 12 , wherein the molded article is a cellular phone case.

Assignees

• Lg Chemical Ltd

Inventors

• Lee Su Kyoung
• Kim Min Ji
• Lee Jong Hyun
• Lee Ryul
• Ahn Sung Tae

Classifications

• C08K7/14

  Glass · CPC title

• H04B1/3888

  Arrangements for carrying or protecting transceivers · CPC title

• C08L2205/03

  containing three or more polymers in a blend · CPC title

• C08L51/085

  on to polysiloxanes · CPC title

• C08L83/10 Primary

  Block- or graft-copolymers containing polysiloxane sequences (obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C08L51/08, C08L53/00) · CPC title