Injection resin composition for home appliance and refrigerator using the same

Patent metadata

Field	Value
Publication number	US-12241675-B2
Application number	US-202217956292-A
Country	US
Kind code	B2
Filing date	Sep 29, 2022
Priority date	Dec 27, 2021
Publication date	Mar 4, 2025
Grant date	Mar 4, 2025

Abstract

An injection resin composition for a home appliance having high flowability, high tensile strength, and excellent chemical resistance and a refrigerator using the same. A refrigerator according to an embodiment of the present disclosure includes: a cabinet frame defining an external appearance of the refrigerator; a liner separating an inside of the refrigerator from an insulation material while the insulation material is provided between the cabinet frame and the liner, wherein the liner includes a high impact polystyrene (HIPS) injection material or an acrylonitrile butadiene styrene (ABS) ALLOY injection material.

First claim

What is claimed is:

1. A refrigerator comprising:
a cabinet frame defining an external appearance of the refrigerator;
a liner separating an inside of the refrigerator from an insulation material while the insulation material is between the cabinet frame and the liner,
wherein the liner includes:
a high impact polystyrene (HIPS) injection material that, based on 100 parts by weight of the HIPS injection material, includes 45 to 65 parts by weight of a chemical-resistant HIPS material and 35 to 55 parts by weight of a highly flowable HIPS material.

2. The refrigerator according to claim 1 , wherein
the liner includes a top side, a right side, a left side, a back side, and a bottom side,
the top side, the right side, the left side, and the back side of the liner include the HIPS injection material, and
the bottom side of the liner includes an acrylonitrile butadiene styrene (ABS) ALLOY injection material.

3. The refrigerator according to claim 1 , wherein the liner has a thickness of 1 to 2.5 mm.

4. The refrigerator according to claim 1 , wherein
the chemical-resistant HIPS material includes 9.5 to 12 wt % of a rubber, and a balance of polystyrene (PS), and
an average particle diameter of the rubber is from 6.0 to 8.5 μm.

5. The refrigerator according to claim 4 , wherein
the highly flowable HIPS material includes 7.0 to 9.0 wt % of a rubber, and a balance of polystyrene (PS), and
an average particle diameter of the rubber is from 1.2 to 1.8 μm.

6. The refrigerator according to claim 1 , wherein
the highly flowable HIPS material includes 7.0 to 9.0 wt % of a rubber, and a balance of polystyrene (PS), and
an average particle diameter of the rubber is from 1.2 to 1.8 μm.

7. The refrigerator according to claim 1 , wherein the HIPS injection material has a melt index (MI) of 6.0 to 9.5 g/10 min.

8. The refrigerator according to claim 1 , wherein the liner further includes:
an acrylonitrile butadiene styrene (ABS) ALLOY injection material that, based on 100 parts by weight of the ABS ALLOY injection material, includes:
65 to 85 parts by weight of a styrene-acrylonitrile (SAN) resin,
10 to 20 parts by weight of an acrylonitrile-polybutyl acrylic acid-styrene copolymer resin (g-AAS),
5 to 15 parts by weight of an acrylonitrile-butadiene-styrene copolymer resin (g-ABS), and
3 to 6 parts by weight of ethylene/alkyl(meth)acrylate.

9. The refrigerator according to claim 8 , wherein
the SAN resin includes 25 to 29 wt % of acrylonitrile, and a balance of polystyrene (PS), and has a weight average molecular weight of 120,000 to 160,000.

10. The refrigerator according to claim 8 , wherein
the g-AAS and g-ABS have a core-shell structure and include 50 to 60 wt % of a rubber material and a balance of the SAN resin.

11. The refrigerator according to claim 8 , wherein the ethylene/alkyl(meth)acrylat e is represented by a formula as follows:

wherein R1 is hydrogen or a methyl group,
R2 is a C1-C12 alkyl group, hydrogen, a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, a sec-butyl group, a t-butyl group, or an isobutyl group,
m and n are degrees of polymerization, and
a ratio of m to n is from 300:1 to 10:90.

12. The refrigerator according to claim 1 , wherein the liner further includes an acrylonitrile butadiene styrene (ABS) ALLOY injection material having a melt index (MI) of 4.5 to 8.0 g/10 min.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Park Nohcheol
• Kim Miran
• Koh Youngdeog
• Kim Kwangjoo
• Choi Jongun

Classifications

• C08F112/08

  Styrene · CPC title

• B32B2307/546

  Flexural strength; Flexion stiffness · CPC title

• B32B2307/54

  Yield strength; Tensile strength · CPC title

• B32B2307/714

  Inert, i.e. inert to chemical degradation, corrosion · CPC title

• B32B2307/558

  Impact strength, toughness · CPC title