Composite resin composition with excellent dimensional stability

Patent metadata

Field	Value
Publication number	US-2022025177-A1
Application number	US-202017103077-A
Country	US
Kind code	A1
Filing date	Nov 24, 2020
Priority date	Jul 22, 2020
Publication date	Jan 27, 2022
Grant date	—

Abstract

Disclosed are a composite resin composition and an article containing the same. The composite resin composition may include semicrystalline polyamide; amorphous polyamide; an acrylonitrile-butadiene-styrene (ABS) resin; a compatibilizer; and a strength-reinforcing agent. The article may exhibit superior rigidity equivalent to or greater than that of conventional long-fiber thermoplastics and remarkably excellent dimensional stability. In addition, the composite resin composition and the molded article including the same may be used in replacement of steel parts so as to reduce the weight by about 30%.

First claim

What is claimed is:

1 . A composite resin composition comprising:
semicrystalline polyamide; amorphous polyamide; an acrylonitrile-butadiene-styrene (ABS) resin; a compatibilizer; and a strength-reinforcing agent.

2 . The composite resin composition according to claim 1 , wherein the composite resin composition comprises:
an amount of 30 to 59% by weight of the semicrystalline polyamide; an amount of 5 to 20% by weight of the amorphous polyamide; an amount of 5 to 30% by weight of the acrylonitrile-butadiene-styrene (ABS) resin; an amount of 0.5 to 5% by weight of the compatibilizer; and an amount of 30 to 50% by weight of the strength-reinforcing agent, all the % by weight based on the total weight of the composite resin composition.

3 . The composite resin composition according to claim 1 , further comprising:
an amount of 0.1 to 10% by weight of an additive comprising one or more selected from the group consisting of light-resistant stabilizers, heat-resistant stabilizers, antioxidants, dispersants, lubricants, nucleating agents, releasing agents, metal ion stabilizers, flame retardants, dyes, and pigments.

4 . The composite resin composition according to claim 1 , wherein the semicrystalline polyamide has a relative viscosity, measured in a 98% sulfuric acid solvent, of 2.0 to 2.7.

5 . The composite resin composition according to claim 1 , wherein the semicrystalline polyamide comprises one or more selected from the group consisting of polyamide 3, polyamide 4, polyamide 6, polyamide 8, polyamide 9, polyamide 11, polyamide 12, polyamide 6,6, polyamide 6,10, and polyamide 6,12.

6 . The composite resin composition according to claim 1 , wherein the amorphous polyamide has a relative viscosity, measured in a 98% sulfuric acid solvent, of 1.7 to 2.4.

7 . The composite resin composition according to claim 1 , wherein the ABS resin has a melt flow index of 15 to 40 g/min under a load of 10 kg at a temperature of 220° C.

8 . The composite resin composition according to claim 1 , wherein the compatibilizer comprises a styrene-N-phenylmaleimide copolymer.

9 . The composite resin composition according to claim 1 , wherein the strength-reinforcing agent comprises a flat glass fiber.

10 . The composite resin composition according to claim 9 , wherein a cross section of the flat glass fiber has an aspect ratio (width/length) of 2:1 to 4:1.

11 . The composite resin composition according to claim 9 , wherein the flat glass fiber comprises one or more selected from the group consisting of SiO 2 and AlO 2 .

12 . The composite resin composition according to claim 1 , wherein the strength-reinforcing agent further comprises a coupling agent.

13 . A molded article produced from a composite resin composition according to claim 1 .

14 . The molded article according to claim 13 , wherein the molded article is an automobile panorama sunroof frame.

15 . A vehicle comprising a molded article according to claim 13 .

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp
• Hyundai Advanced Mat Co Ltd

Inventors

• Park Sang Sun
• Lee Han Sol
• Seo Kyeong Bae
• Seo Min Sik
• Kang In Seok
• Noh Wan Ki
• Park Jae Han
• Kim Dong Hyun
• Kim Hea Lin
• Lee Hyung Joo
• Hong Seung Soo
• Lee Dong Chang
• Lee Hyeung Min

Classifications

• C08L2205/035

  containing four or more polymers in a blend · CPC title

• C08L2205/02

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

• C08L77/02 Primary

  Polyamides derived from omega-amino carboxylic acids or from lactams thereof (C08L77/10 takes precedence) · CPC title

• C08K2201/003

  Additives being defined by their diameter · CPC title

• C08K2201/004

  Additives being defined by their length · CPC title