Composite resin composition with excellent dimensional stability

Patent metadata

Field	Value
Publication number	US-11566131-B2
Application number	US-202017103077-A
Country	US
Kind code	B2
Filing date	Nov 24, 2020
Priority date	Jul 22, 2020
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

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:
an amount of 30 to 59% by weight of a semicrystalline polyamide;
an amount of 5 to 20% by weight of an amorphous polyamide;
an amount of 5 to 30% by weight of an acrylonitrile-butadiene-styrene (ABS) resin;
an amount of 0.5 to 5% by weight of a compatibilizer; and
an amount of 30 to 50% by weight of a strength-reinforcing agent,
all the % by weight based on the total weight of the composite resin composition,
wherein the compatibilizer comprises a styrene-N-phenylmaleimide copolymer; and
wherein the strength-reinforcing agent comprises a flat glass fiber,
wherein the semicrystalline polyamide has a relative viscosity, measured in a 98% sulfuric acid solvent, of 2.0 to 2.7,
wherein the amorphous polyamide has a relative viscosity, measured in a 98% sulfuric acid solvent, of 1.7 to 2.4,
wherein the amorphous polyamide has a glass transition temperature of 100 to 130° C.

2. The composite resin composition according to claim 1 , further comprising:
an amount of about 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.

3. 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.

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

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

6. The composite resin composition according to claim 1 , wherein the flat glass fiber comprises SiO 2 and AlO 2 .

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

8. The molded article according to claim 7 , wherein the molded article is an automobile panorama sunroof frame.

9. A vehicle comprising a molded article according to claim 7 .

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

• C08L2205/03

  containing three or more polymers in a blend · CPC title

• C08L77/06 Primary

  Polyamides derived from polyamines and polycarboxylic acids (C08L77/10 takes precedence) · CPC title

• C08L2205/02

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

• C08K2201/003

  Additives being defined by their diameter · CPC title

• C08L2205/035

  containing four or more polymers in a blend · CPC title