Polyphenylene sulfide resin composition and molded articles for automobiles manufactured using the same

Patent metadata

Field	Value
Publication number	US-12180367-B2
Application number	US-202218079284-A
Country	US
Kind code	B2
Filing date	Dec 12, 2022
Priority date	Jun 30, 2022
Publication date	Dec 31, 2024
Grant date	Dec 31, 2024

Abstract

Disclosed is a polyphenylene sulfide resin composition for an automobile part that includes 30 to 40 parts by weight of a glass fiber, 10 to 20 parts by weight of glass bead, and 5 to 10 parts by weight of a polyolefin resin for each 100 parts by weight of a polyphenylene sulfide resin.

First claim

What is claimed is:

1. A polyphenylene sulfide resin composition for an automobile part, comprising:
30 to 40 parts by weight of a glass fiber;
10 to 20 parts by weight of glass bead;
5 to 10 parts by weight of a polyolefin resin, for each 100 parts by weight of a polyphenylene sulfide resin; and
at least one additive selected from a group consisting of ultraviolet (UV) stabilizers and compatibilizers,
wherein the polyolefin resin includes at least one selected from a group consisting of polybutene, polyoctene or polyisoprene, ethylene methylacrylate, and an ethylene-methylacrylate-glycidyl-methacrylate-terpolymer, and
wherein a weight average molecular weight of the polyolefin resin ranges from 25,000 to 200,000.

2. The polyphenylene sulfide resin composition of claim 1 , wherein the polyphenylene sulfide resin has a melt index in a range of 20 to 30 g/min, corresponding to a measurement of the melt index in accordance with an ISO 1133 Standard at 300° C./5 Kg.

3. The polyphenylene sulfide resin composition of claim 1 , wherein the glass fiber has an average diameter of 10 to 11 μm and a length of 3 to 4 mm.

4. The polyphenylene sulfide resin composition of claim 1 , wherein the glass bead has an average diameter of 1 to 45 μm.

5. The polyphenylene sulfide resin composition of claim 1 , wherein at least one of the glass fiber and the glass bead is surface-treated with a silane coupling agent having at least one of an epoxy group and a glycidyl group.

6. The polyphenylene sulfide resin composition of claim 5 , wherein the silane coupling agent includes at least one selected from a group consisting of
3-glycidoxypropyltrimethoxysilane,
3-glycidoxypropylmethyldiethoxysilane,
2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, and
3-glycidoxypropyltriethoxysilane.

7. The polyphenylene sulfide resin composition of claim 5 , wherein the polyolefin resin comprises a reactive group that binds to the surface-treated at least one of the glass fiber and the glass bead.

8. The polyphenylene sulfide resin composition of claim 7 , wherein the reactive group of the polyolefin resin is an epoxy group or glycidyl methacrylate.

9. A molded article for an automobile, manufactured by melt-extruding the polyphenylene sulfide resin composition of claim 1 .

10. The molded article of claim 9 , wherein the molded article has a tensile strength in a range of 148 to 160 MPa and a weld strength in a range of 47 to 60 MPa, corresponding to respective measurements of the tensile strength and the weld strength in accordance with an ISO 527 Standard test method at 5 mm/min.

11. The molded article of claim 9 , wherein the molded article has a dielectric breakdown strength in a range of 16 to 20 kV/mm, corresponding to a measurement of the dielectric breakdown strength in accordance with an IEC 60243-1 Standard test method.

12. The molded article of claim 9 , wherein the molded article has a comparative tracking index (CTI) of grades 3 to 4, corresponding to a measurement of the CTI in accordance with an IEC 60112 Standard test method.

13. The molded article of claim 9 , wherein the molded article has an elongation of 1.6 to 2%, corresponding to a measurement of the elongation in accordance with an ISO 527 Standard test method.

14. The molded article of claim 9 , wherein the molded article has an Izod notched impact strength in a range of 7.5 to 10.0 KJ/m 2 , corresponding to a measurement of the Izod notched impact strength in accordance with an ISO 180 Standard test method at 23° C.

15. The molded article of claim 9 , wherein the molded article has a high-speed surface impact peak force of 190 to 270 N and a break energy in a range of 1.4 to 3.0 J, corresponding to respective measurements of the high-speed surface impact peak force and the break energy in accordance with an ISO 6603 test method.

16. The molded article of claim 9 , wherein the molded article is a terminal assembly of a driving motor.

Assignees

• Hyundai Mobis Co Ltd
• Hyundai Advanced Mat Co Ltd

Inventors

• Kang Hyoung Taek
• Lee Eun Chang
• Lee Sang Gil
• Koo Kwon Mo
• Hwang Sang Woon
• Kim Dong Ju

Classifications

• C08K5/5435

  containing oxygen in a ring · CPC title

• C08K3/40

  Glass · CPC title

• C08K7/14

  Glass · CPC title

• C08K9/06

  with silicon-containing compounds · CPC title

• C08L101/00

  Compositions of unspecified macromolecular compounds · CPC title