Resin composition

Patent metadata

Field	Value
Publication number	US-9745446-B2
Application number	US-201414768811-A
Country	US
Kind code	B2
Filing date	Mar 20, 2014
Priority date	Mar 25, 2013
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

Provided are a resin composition controlled such that after keeping under a severe environment as in high-temperature hot water or in hot water under chemically severe condition, such as an acidic or basic condition, etc., for a fixed period of time, it is quickly decomposed; and a structure thereof.

First claim

The invention claimed is:

1. A resin composition including an aliphatic polyester mainly derived from water-soluble monomers (component C) and a hydrolysis regulator having reactivity with an acidic group in a 15% hydrochloric acid aqueous solution at 100° C. of 30% or more (component D), the resin composition satisfying any one of the following J1 to J2:
J1: In the 15% hydrochloric acid aqueous solution at 100° C., after 6 hours, a weight average molecular weight retention rate of the resin composition is 50% or more, and after 24 hours, a weight of a water-insoluble matter of the resin composition is 50% or less; and
J2: In the 15% hydrochloric acid aqueous solution at 120° C., after 1 hour, a weight average molecular weight retention rate of the resin composition is 50% or more, and after 24 hours, a weight of a water-insoluble matter of the resin composition is 50% or less;
wherein the hydrolysis regulator (component D) comprises 3,4-epoxycyclohexenylmethyl-3′,4′-epoxycyclohexene carboxylate.

2. The resin composition according to claim 1 , wherein after 72 hours, the weight of the water-insoluble matter of the resin composition is 1% or less.

3. The resin composition according to claim 1 , wherein a main chain of the aliphatic polyester is composed mainly of a lactic acid unit represented by the following formula (1):

4. A molded article comprising the resin composition according to claim 1 .

5. The resin composition according to claim 2 , wherein a main chain of the component A is composed mainly of a lactic acid unit represented by the following formula (1):

Assignees

• Teijin Ltd

Inventors

• Shoji Shinichiro
• Iwai Masahiro
• Kanematsu Shunsuke
• Ono Yuhei

Classifications

• D01F6/625

  derived from hydroxy-carboxylic acids, e.g. lactones · CPC title

• C08K5/29 Primary

  Compounds containing {one or more} carbon-to-nitrogen double bonds · CPC title

• C08L101/16

  the macromolecular compounds being biodegradable · CPC title

• C08K2201/014

  Additives containing two or more different additives of the same subgroup in C08K · CPC title

• C08L67/04

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