Aliphatic polyester resin composition and molded article containing this resin composition

Patent metadata

Field	Value
Publication number	US-9340659-B2
Application number	US-201314439512-A
Country	US
Kind code	B2
Filing date	Oct 28, 2013
Priority date	Oct 29, 2012
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

The present invention provides a resin composition that improves slow crystallization, which is a drawback of polyhydroxyalkanoates, and is excellent in molding processability and productivity. The resin composition is an aliphatic polyester resin composition comprising a polyhydroxyalkanoate (A), an amide bond-containing compound (B), and pentaerythritol (C), wherein the amide bond-containing compound (B) is represented by any one of the following general formulas: R 1 —C(O)N(R 2 ) 2 , R 1 —C(O)NH—(R 3 )—NHC(O)—R 1 , R 1 —NHC(O)NH—(R 3 )—NHC(O)NH—R 1 , R 1 —NHC(O)—R 2 , R 1 —NHC(O)—(R 3 )—C(O)NH—R 1 , R 1 —C(O)NH—(R 3 )—C(O)NH—R 1 , R 1 —NHC(O)NH—(R 3 )—C(O)NH—R 1 , and R 1 —NHC(O)NH—(R 3 )—NHC(O)—R 1 .

First claim

The invention claimed is:

1. An aliphatic polyester resin composition comprising a polyhydroxyalkanoate (A), an amide bond-containing compound (B), and pentaerythritol (C), wherein
the amide bond-containing compound (B) is any one of compounds represented by the following general formulas:
R 1 —C(O)N(R 2 ) 2 , R 1 —C(O)NH—(R 3 )—NHC(O)—R 1 , R 1 —NHC(O)NH—(R 3 )—NHC(O)NH—R 1 , R 1 —NHC(O)—R 2 , R 1 —NHC(O)—(R 3 )—C(O)NH—R 1 , R 1 —C(O)NH—(R 3 )—C(O)NH—R 1 , R 1 —NHC(O)NH—(R 3 )—C(O)NH—R 1 , and R 1 —NHC(O)NH—(R 3 )—NHC(O)—R 1 , or a combination of two or more of the compounds, and in the formulas,
R 1 s are each independently a C 6 to C 30 alkyl,
R 2 s are each independently H or a C 1 to C 20 alkyl, and
R 3 s are each independently a C 2 to C 10 alkylene.

2. The aliphatic polyester resin composition according to claim 1 , wherein the amide bond-containing compound (B) is one or more selected from lauramide, myristamide, stearamide, behenamide, and erucamide.

3. The aliphatic polyester resin composition according to claim 1 , wherein an amount of the pentaerythritol (C) is 0.05 to 12 parts by weight with respect to 100 parts by weight of an amount of the polyhydroxyalkanoate (A).

4. The aliphatic polyester resin composition according to claim 1 , wherein the polyhydroxyalkanoate (A) contains a repeating unit represented by the following general formula (1)
[—CHR—CH 2 —CO—O—]  (1)

wherein R is an alkyl group represented by C n H 2n+1 and n is an integer of 1 or more and 15 or less.

5. The aliphatic polyester resin composition according to claim 1 , wherein the polyhydroxyalkanoate (A) is one or more selected from a poly(3-hydroxybutyrate) homopolymer resin, a poly(3-hydroxybutyrate-co-3-hydroxyvalerate) copolymer resin, a poly(3-hydroxybutyrate-co-3-hydroxyvalerate-co-3-hydroxyhexanoate) copolymer resin, a poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) copolymer resin, and a poly(3-hydroxybutyrate-co-4-hydroxybutyrate) copolymer resin.

6. A polyester resin molded article obtained by molding the aliphatic polyester resin composition according to claim 1 .

Assignees

• Kaneka Corp

Inventors

• Suzuki Noriyuki
• Minami Tetsuya

Classifications

• C08K5/20 Primary

  Carboxylic acid amides · CPC title

• C08K5/053

  Polyhydroxylic alcohols · CPC title

• C08L101/16

  the macromolecular compounds being biodegradable · CPC title

• C08L67/04

  Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C08L67/06 takes precedence) · CPC title