Polyamide resin, polyamide resin composition containing same, preparation method therefor, and molded product including same

Patent metadata

Field	Value
Publication number	US-10385166-B2
Application number	US-201615547856-A
Country	US
Kind code	B2
Filing date	Apr 8, 2016
Priority date	Apr 29, 2015
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

The polyamide resin of the present invention is a polymer of a monomer mixture including a dicarboxylic acid and an amine-based compound, wherein the amine-based compound comprises diamine and triamine and a branching rate measured using 1 H-NMR is approximately 1% to approximately 8%.

First claim

The invention claimed is:

1. A polyamide resin composition comprising:
a polyamide resin which is a polymer of a monomer mixture comprising a dicarboxylic acid and an amine compound comprising a diamine and a triamine, wherein the polyamide resin has a branch rate of about 1% to about 8%, as measured using 1 H-NMR; and
about 10 to about 50 parts by weight of a fiber-reinforcing agent relative to 3 parts by weight of the polyamide resin,
wherein the polyamide resin composition has a ⅛″ notched Izod impact strength of about 8.0 kgf·cm/cm to about 12 kgf·cm/cm, as measured on a specimen in accordance with ASTM D256.

2. The polyamide resin composition according to claim 1 , wherein the polyamide resin composition has a 1,000-hour tensile strength retention rate of about 80% or more, as measured on a specimen at 170° C. in accordance with ASTM D638.

3. The polyamide resin composition according to claim 1 , further comprising:
a flame retardant, a surfactant, a nucleating agent, a coupling agent, a filler, a plasticizer, an impact modifier, a lubricant, an antibiotic agent, a release agent, a heat stabilizer, an antioxidant, a photostabilizer, a compatibilizer, an inorganic additive, a colorant, a lubricating agent, an antistatic agent, a pigment, a dye, and/or a flame proofing agent.

4. The polyamide resin composition according to claim 1 , wherein the triamine is represented by Formula (1):

wherein R 1 and R 2 are each independently a C 1 to C 15 alkylene group, a C 2 to C 15 branched alkylene group, or a C 3 to C 15 cycloalkylene group.

5. The polyamide resin composition according to claim 1 , wherein the dicarboxylic acid comprises a C 8 to C 20 aromatic dicarboxylic acid and/or a C 3 to C 20 aliphatic dicarboxylic acid.

6. The polyamide resin composition according to claim 1 , wherein the diamine comprises a C 6 to C 20 aromatic diamine and/or a C 2 to C 20 aliphatic diamine.

7. The polyamide resin composition according to claim 1 , wherein the triamine is present in an amount of about 1 mol % to about 8 mol % based on 100 mol % of the amine compound.

8. The polyamide resin composition according to claim 1 , wherein the dicarboxylic acid and the amine compound are present in a mole ratio of about 1:0.98 to about 1:1.15.

9. The polyamide resin composition according to claim 1 , wherein the polyamide resin has a difference of about 50° C. or more between melting temperature (Tm) and crystallization temperature (Tc) thereof.

10. A molded product formed from a polyamide resin composition comprising:
a polyamide resin which is a polymer of a monomer mixture comprising a dicarboxylic acid and an amine compound comprising a diamine and a triamine, wherein the polyamide resin has a branch rate of about 1% to about 8%, as measured using 1 H-NMR; and
about 10 to about 50 parts by weight of a fiber-reinforcing agent relative to 3 parts by weight of the polyamide resin,
wherein the polyamide resin composition has a ⅛″ notched Izod impact strength of about 8.0 kgf·cm/cm to about 12 kgf·cm/cm, as measured on a specimen in accordance with ASTM D256.

Assignees

• Lotte Advanced Mat Co Ltd

Inventors

• Kwon So Young
• Kim Joon Sung
• Kim Jin Kyu
• Im Sang Kyun
• Kwon Il Kyoung
• Son Ki Chul
• Jin Young Sub
• Choi Sung Chul

Classifications

• C08G73/028

  Polyamidoamines · CPC title

• C08L77/06 Primary

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

• C08K5/00

  Use of organic ingredients · CPC title

• C08K3/00

  Use of inorganic substances as compounding ingredients · CPC title

• C08G69/26 Primary

  derived from polyamines and polycarboxylic acids · CPC title