Nylon-based resin composite

Patent metadata

Field	Value
Publication number	US-9796845-B2
Application number	US-48686209-A
Country	US
Kind code	B2
Filing date	Jun 18, 2009
Priority date	Dec 18, 2006
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

Disclosed is a nylon-based resin composite that has a sufficiently low moisture absorption rate to substantially prevent the occurrence of deformation and can attain both low warpage and improved impact resistance. The nylon-based resin composite comprises about 100 parts by weight of a base resin and about 1 to about 30 parts by weight of an impact modifier wherein the base resin comprises about 20 to about 80% by weight of a modified nylon-based thermoplastic resin containing benzene rings in the main chain and about 20 to about 80% by weight of a flat reinforcing fiber having a cross-sectional aspect ratio of about 1.5 or more.

First claim

That which is claimed is:

1. A nylon-based resin composite consisting essentially of: about 100 parts by weight of a base resin, the base resin comprising about 50 to about 80% by weight of a modified nylon-based thermoplastic resin containing benzene rings in the main chain and about 20 to about 50% by weight of a reinforcing fiber having a cross-sectional aspect ratio of about 1.5 to 4, wherein said reinforcing fibers have a length of about 2 to about 13 mm;
about 2 to 3.6 parts by weight of an impact modifier consisting of an ethylene/octene rubber grafted with one or more reactive functional groups; and
optionally at least one additive selected from antioxidants, heat stabilizers, light stabilizers, flow enhancers, lubricants, antibacterial agents, release agents, nucleating agents, and combinations thereof,
wherein then nylon-based resin composite has a warpage of 0.3 to 0.7 mm measured using a mold square sample having a size of 6″×6″ and a thickness of 1/16″ prepared at 80° C., then allowing that the mold square sample is allowed to stand in a constant temperature/humidity room at 23° C. for 24 hours without applying any external force, assessed by fixing three bottom vertices of the square sample, and measuring the height of the remaining one vertex, which extends upward due to distortion of the sample.

2. The nylon-based resin composite according to claim 1 , wherein the reinforcing fiber comprises glass fibers, carbon fibers, aramid fibers, potassium titanate fibers, silicon carbide fibers, or a combination thereof.

3. The nylon-based resin composite according to claim 1 , wherein the reinforcing fiber is a glass fiber.

4. A pellet produced by extruding the nylon-based resin composite according to claim 1 .

5. The nylon-based resin composite according to claim 1 , wherein the nylon-based resin composite has a warpage of 0.3 to 0.5 mm.

6. The nylon-based resin composite according to claim 1 , wherein the nylon-based resin composite has a flexural modulus of 80,000 to 140,000 kgf/cm 2 measured in accordance with ASTM D-790.

7. The nylon-based resin composite according to claim 6 , wherein the nylon-based resin composite has a flexural modulus of 110,000 to 140,000 kgf/cm 2 measured in accordance with ASTM D-790.

8. The nylon-based resin composite according to claim 1 , wherein the nylon-based resin composite has a flexural strength of 2000 to 3000 kgf/cm 2 measured in accordance with ASTM D-790.

9. The nylon-based resin composite according to claim 8 , wherein the nylon-based resin composite has a flexural strength of 2600 to 3000 kgf/cm 2 measured in accordance with ASTM D-790.

10. The nylon-based resin composite according to claim 1 , wherein the nylon-based resin composite has a flexural modulus of 80,000 to 140,000 kgf/cm 2 measured in accordance with ASTM D-790; and a flexural strength of 2000 to 3000 measured in accordance with ASTM D-790.

11. The nylon-based resin composite according to claim 1 , wherein the nylon-based resin composite has a warpage of 0.3 to 0.5 mm; a flexural modulus of 110000 to 140,000 kgf/cm 2 measured in accordance with ASTM D-790; and a flexural strength of 2600 to 3000 kgf/cm 2 measured in accordance with ASTM D-790.

Assignees

• Park Jung Hoon
• Lee Young Jun
• Kim Tae Uk
• Youn Bum Seok
• Lotte Advanced Mat Co Ltd

Inventors

• Park Jung Hoon
• Lee Young Jun
• Kim Tae Uk
• Youn Bum Seok

Classifications

• C08L77/00 Primary

  Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain (of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08); Compositions of derivatives of such polymers · CPC title

• C08L23/08

  Copolymers of ethene (C08L23/16 takes precedence) · CPC title

• C08L51/085

  on to polysiloxanes · CPC title

• C08L2666/02

  Organic macromolecular compounds, natural resins, waxes or and bituminous materials · CPC title

• C08L51/04

  grafted on to rubbers · CPC title