Polyester resin composition containing amino-triazine derivative

Patent metadata

Field	Value
Publication number	US-10899720-B2
Application number	US-201816169469-A
Country	US
Kind code	B2
Filing date	Oct 24, 2018
Priority date	Mar 22, 2013
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

A polyester resin composition containing 100 parts by mass of a polyester resin and 0.01 to 10 parts by mass of a 2-amino-1,3,5-triazine derivative of Formula [1]:

a polyester resin molded body obtained by the composition, and a crystal nucleating agent including the triazine derivative. A polyester resin composition containing a crystal nucleating agent that makes it possible to produce, with high productivity, a polyester resin molded product that promotes polyester resin crystallization and maintains high transparency after crystallization and is applicable for a wide variety of uses can be provided.

First claim

The invention claimed is:

1. A method for crystallizing a polyester resin, comprising:
heating the polyester resin in the presence of a crystal nucleating agent containing 0.01 to 2 parts by mass of a 2-amino-1,3,5-triazine derivative of formula [1] relative to 100 parts by mass of the polyester resin to crystallize the polyester resin:

where:
both of R 1 and R 2 are —C(═O)R 10 ,
each R 10 is a C 1-20 alkyl group,
each of R 3 and R 4 is independently a hydrogen atom, a C 1-6 alkyl group, —C(═O)R 5 , —C(═O)OR 6 , —C(═O)NR 7 R 8 , or —SO 2 R 9 ,
each of R 5 , R 6 , and R 9 is independently a C 1-20 alkyl group or a phenyl group optionally substituted with a C 1-6 alkyl group, and
each of R 7 and R 8 is independently a hydrogen atom, a C 1-20 alkyl group, or a phenyl group optionally substituted with a C 1-6 alkyl group.

2. The method according to claim 1 , wherein R 3 and R 4 are each a hydrogen atom.

3. The method according to claim 1 , wherein R 10 is a C 1-8 alkyl group.

4. The method according to claim 3 , wherein R 10 is an ethyl group or a propyl group.

5. The method according to claim 1 , wherein the 2-amino-1,3,5-triazine derivative is N,N′-(6-amino-1,3,5-triazine-2,4-diyl) dipropionamide of Formula [2]:

6. The method according to claim 1 , wherein the polyester resin is a poly(lactic acid) resin.

7. The method according to claim 1 , further comprising mixing the polyester resin with the crystal nucleating agent to form a polyester resin composition.

8. The method according to claim 1 , wherein the polyester resin is heated at a temperature equal to or greater than a glass transition temperature of the polyester resin.

9. The method according to claim 8 , wherein the polyester resin is heated at a temperature that is less than a melting point of the polyester resin.

10. The method according to claim 1 , further comprising forming a polyester resin molded body.

11. The method according to claim 6 , wherein the poly(lactic acid) resin is heated at a temperature in a range of from 60 to 170° C.

12. The method according to claim 1 , wherein the polyester resin is heated during a molding process in which the polyester resin is formed into a specific shape.

Assignees

• Nissan Chemical Ind Ltd

Inventors

• Nagahama Takuma
• Suwa Takeshi

Classifications

• C08K5/0083

  Nucleating agents promoting the crystallisation of the polymer matrix · CPC title

• C08L67/00

  Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain (of polyester-amides C08L77/12; of polyester-imides C08L79/08); Compositions of derivatives of such polymers · CPC title

• C08K5/34922

  Melamine; Derivatives thereof · CPC title

• C07D251/70 Primary

  Other substituted melamines · CPC title