Ionizing-radiation-resistant polycarbonate resin composition, and molded product comprising same

Patent metadata

Field	Value
Publication number	US-10557034-B2
Application number	US-201615754753-A
Country	US
Kind code	B2
Filing date	Aug 30, 2016
Priority date	Aug 31, 2015
Publication date	Feb 11, 2020
Grant date	Feb 11, 2020

Abstract

A polycarbonate resin composition of the present invention comprises: a polycarbonate resin; a polyalkylene glycol; an epoxy ester compound containing an ester group and an epoxy group; and a halogenated polycarbonate oligomer. The polycarbonate resin composition has excellent discoloration resistance, color, hydrolysis resistance, flame retardancy and the like even after being irradiated with ionizing radiation.

First claim

The invention claimed is:

1. A polycarbonate resin composition comprising:
about 100 parts by weight of a polycarbonate resin;
about 0.001 to about 5 parts by weight of a polyalkylene glycol;
about 0.001 to about 3 parts by weight of an epoxy ester compound containing an ester group and an epoxy group; and
about 0.01 to about 5 parts by weight of a halogenated polycarbonate oligomer.

2. The polycarbonate resin composition according to claim 1 , wherein the epoxy ester compound containing an ester group and an epoxy group is a compound represented by Formula 1:

where R 1 and R 3 are each independently a C 1 to C 10 hydrocarbon group; R 2 and R 4 are each independently a hydrogen atom or C 1 to C 10 hydrocarbon group; m and n are 0 or 1; and m+n is 1 or 2, wherein R 1 and R 2 and/or R 3 and R 4 are optionally connected to form a ring.

3. The polycarbonate resin composition according to claim 1 , wherein the halogenated polycarbonate oligomer comprises a repeat unit represented by Formula 2:

where A is a single bond, a C 1 to C 20 hydrocarbon group, —CO—, —S— or —SO 2 —; and X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 and X 8 are each independently a halogen atom, a hydrogen atom, or a C 1 to C 10 hydrocarbon group, with the proviso that at least one of X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 and X 8 is a halogen atom.

4. The polycarbonate resin composition according to claim 1 , wherein the halogenated polycarbonate oligomer has a weight average molecular weight of about 600 g/mol to about 10,000 g/mol.

5. The polycarbonate resin composition according to claim 1 , wherein the halogenated polycarbonate oligomer comprises about 20 wt % to about 60 wt % of a halogen based on 100 wt % of the halogenated polycarbonate oligomer.

6. The polycarbonate resin composition according to claim 1 , wherein the content of the polyalkylene glycol is about 2 to about 20 times the content of the epoxy ester compound containing an ester group and an epoxy group.

7. The polycarbonate resin composition according to claim 1 , wherein the polyalkylene glycol and the epoxy ester compound are present in a total amount of about 0.002 to about 5 parts by weight relative to about 100 parts by weight of the polycarbonate resin.

8. The polycarbonate resin composition according to claim 1 , wherein the content of the halogenated polycarbonate oligomer is about 2 to about 15 times the content of the epoxy ester compound containing an ester group and an epoxy group.

9. The polycarbonate resin composition according to claim 1 , wherein the polycarbonate resin composition has a yellow index difference (ΔYI) of about 5 or less, as measured on an about 3.2 mm thick specimen and calculated according to Equation 1:
ΔYI=YI 1 −YI 0

where YI 0 is a yellow index (YI) of the specimen, as measured in accordance with ASTM D1925 before irradiation with γ-rays, and YI 1 is a yellow index (YI) of the specimen, as measured in accordance with ASTM D1925 after irradiation with γ-rays at about 25 kGy and leaving the specimen for about 7 days.

10. The polycarbonate resin composition according to claim 1 , wherein the polycarbonate resin composition has a brightness (L*) of about 80 or more, as measured on an about 3.2 mm thick specimen in accordance with ASTM D2244 after irradiation with γ-rays at about 25 kGy and leaving the specimen for about 7 days.

11. The polycarbonate resin composition according to claim 1 , wherein the polycarbonate resin composition has a weight average molecular weight difference of about 2,000 g/mol or less, as measured on an about 3.2 mm thick specimen after steam treatment at about 120° C. and about 2 bar for about 16 hours.

12. The polycarbonate resin composition according to claim 1 , wherein the polycarbonate resin composition has a flame retardancy of V-1 or more, as measured on an about 2.5 mm thick specimen in accordance with the UL-94 vertical test method.

13. A molded product formed of the polycarbonate resin composition according to claim 1 .

14. The molded product according to claim 13 , wherein the molded product is an ionizing radiation-resistant medical appliance.

Assignees

• Lotte Advanced Mat Co Ltd

Inventors

• Chei Woo Suk
• Jang Hyun Hye
• Lee Jung Jae
• Chi Jun Ho
• Hur Jong Chan
• Kwon O Sung

Classifications

• C08L2205/03

  containing three or more polymers in a blend · CPC title

• C08L2205/02

  containing two or more polymers of the same C08L -group · CPC title

• C08L2201/08

  Stabilised against heat, light or radiation or oxydation · CPC title

• C08L69/00 Primary

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

• C08K5/10

  Esters; Ether-esters · CPC title