Thermoplastic resin composition and molded product manufactured therefrom

Patent metadata

Field	Value
Publication number	US-12565583-B2
Application number	US-202017764645-A
Country	US
Kind code	B2
Filing date	Sep 29, 2020
Priority date	Sep 30, 2019
Publication date	Mar 3, 2026
Grant date	Mar 3, 2026

Abstract

Provided are a thermoplastic resin composition and a molded product manufactured therefrom, the thermoplastic resin composition including, based on 100 parts by weight of a base resin including (A) 75 to 85 wt % of a polycarbonate resin; (B) 7 to 15 wt % of an acrylic rubber-modified aromatic vinyl graft copolymer; and (C) 7 to 13 wt % of an aromatic vinyl-vinyl cyanide copolymer; (D) 0.7 to 5 parts by weight of zinc oxide (ZnO); and (E) 0.2 to 0.6 parts by weight of a phosphorus-based compound represented by Chemical Formula 1.

(RO) n P(═O)(OH) 3-n   [Chemical Formula 1]

In Chemical Formula 1,
n is an integer of 1 to 3, and R is selected from a substituted or unsubstituted C1 to C30 alkyl group, a C2 to C30 alkenyl group, a C2 to C30 alkynyl group, a substituted or unsubstituted C1 to C30 and a substituted or unsubstituted C3 to C30 heteroaryl group.

First claim

The invention claimed is:

1 . A thermoplastic resin composition, comprising
100 parts by weight of a base resin comprising: (A) 75 to 85 wt % of a polycarbonate resin, wherein the (A) polycarbonate resin has a melt flow index of 5 to 40 g/10 min, which is measured under the condition of 250° C. and a 10 kg load according to the ASTM D1238 standard; (B) 7 to 15 wt % of an acrylic rubber-modified aromatic vinyl graft copolymer; and (C) 7 to 13 wt % of an aromatic vinyl-vinyl cyanide copolymer; (D) 0.7 to 5 parts by weight of zinc oxide (ZnO); and (E) 0.2 to 0.6 parts by weight of a phosphorus-based compound represented by Chemical Formula 1:
(RO) n P(═O)(OH) 3-n   [Chemical Formula 1]

wherein, in Chemical Formula 1, n is an integer of 1 to 3, and R is selected from a substituted or unsubstituted C1 to C30 alkyl group, a C2 to C30 alkenyl group, a C2 to C30 alkynyl group, a substituted or unsubstituted C1 to C30 cycloalkyl group, a substituted or unsubstituted C6 to C30 aryl group, and a substituted or unsubstituted C3 to C30 heteroaryl group, wherein the (D) zinc oxide has:
an average particle diameter (D50) of 0.5 to 3 μm;
a peak position 20 value obtained by X-ray diffraction (XRD) analysis of 35° to 37° and a crystallite size value according to Equation 1 of 1,000 to 2,000 Å:

Crystallite
⁢

size
(
D
)

=

k
⁢
λ

β
⁢
cos
⁢
θ

[

Equation
⁢

1

]

wherein, in Equation 1, k is a shape factor, λ is an X-ray wavelength, β is a FWHM value (degree) of an X-ray diffraction peak, and θ is a peak position value (degree); and
a size ratio (B/A) of a peak A in a 370 to 390 nm region to a peak B in a 450 to 600 nm region of 0.01 to 1 when measuring photoluminescence.

2 . The thermoplastic resin composition of claim 1 , wherein the (D) zinc oxide has a BET specific surface area of 1 to 10 m 2 /g.

3 . The thermoplastic resin composition of claim 1 , wherein
the (B) acrylic rubber-modified aromatic vinyl graft copolymer comprises an acrylic rubbery polymer having an average particle diameter of 100 to 500 nm.

4 . The thermoplastic resin composition of claim 1 , wherein
the (B) acrylic rubber-modified aromatic vinyl graft copolymer is obtained by graft polymerization of a monomer mixture including an aromatic vinyl compound and a vinyl cyanide compound to 40 to 60 wt % of an acrylic rubbery polymer.

5 . The thermoplastic resin composition of claim 1 , wherein
the (B) acrylic rubber-modified aromatic vinyl graft copolymer is an acrylonitrile-styrene-acrylate graft copolymer.

6 . The thermoplastic resin composition of claim 1 , wherein
the (C) aromatic vinyl-vinyl cyanide copolymer is a copolymer of a monomer mixture including 60 to 85 wt % of an aromatic vinyl compound and 15 to 40 wt % of a vinyl cyanide-compound.

7 . The thermoplastic resin composition of claim 1 , wherein
the (C) aromatic vinyl-vinyl cyanide copolymer has a melt flow index of 1 to 10 g/10 min measured under the condition of 200° C. and a 5 kg load according to ASTM D1238 standard.

8 . The thermoplastic resin composition of claim 1 , wherein
the (C) aromatic vinyl-vinyl cyanide copolymer is a styrene-acrylonitrile copolymer.

9 . The thermoplastic resin composition of claim 1 , wherein
the thermoplastic resin composition further comprises at least one additive selected from a flame retardant, a nucleating agent, a coupling agent, a filler, a plasticizer, an impact modifier, a lubricant, a release agent, a heat stabilizer, an antioxidant, an inorganic material additive, an ultraviolet (UV) stabilizer, an antistatic agent, a pigment, and a dye.

10 . A molded product manufactured from the thermoplastic resin composition of claim 1 .

11 . The molded product of claim 10 , wherein
the molded product has a notched Izod impact strength of a ⅛″-thick specimen ranging from 30 to 100 kgf·cm/cm according to ASTM D256.

12 . The molded product of claim 10 , wherein
the molded product has each antibacterial activity value of 2 to 7 which is obtained by inoculating samples with Staphylococcus aureus and Escherichia coli , and measuring after 24 hours of incubation under the condition of 35° C. and RH of 90% according to the JIS Z 2801 antibacterial evaluation method.

13 . The molded product of claim 10 , wherein
the molded product has a color change (ΔE) of the specimen of greater than 0 and less than 0.4, which is measured at 89° C., RH of 50%, 84 MJ/m 2 , and a lamp wavelength of 300 to 400 nm by a xenon arc test method specified in SAE J 1885.

14 . The molded product of claim 10 , wherein
the molded product has a heat deflection temperature (HDT) of the specimen of 110 to 200° C., which is measured under a 18.56 kg load according to ASTM D648.

Assignees

• Lotte Chemical Corp

Inventors

• Kim Doo Young
• Ryoo Heekyoung
• Kwon Keehae
• Hong Jaekeun

Classifications

• C08K3/22 Primary

  of metals · CPC title

• C08K2003/2296

  of zinc · CPC title

• C08K5/521

  Esters of phosphoric acids, e.g. of H3PO4 · CPC title

• C08L2205/03

  containing three or more polymers in a blend · CPC title

• C08K2201/003

  Additives being defined by their diameter · CPC title