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Biodegradable resin composition and molded article produced from the same

A resin composition, biodegradable technology, applied in the field of biodegradable resin composition and its molded body, can solve the problem of large drape, easy generation of burrs, biodegradable aliphatic polyester resin copolymer, etc. problems, achieve the effect of reducing burrs and improving formability

Active Publication Date: 2008-04-30
KANEKA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the physical properties of the resin composition, especially impact resistance or transparency are insufficient
[0007] In addition, poly(3-hydroxyalkanoate) copolymers, which are biodegradable aliphatic polyester resins, have relatively low drawdown during melt processing in extrusion molding or vacuum molding. Large, easy to produce burrs in injection molding, these problems must be improved
[0008] In addition, although it is described in Patent Document 3 that adding an acrylic compound to a thermoplastic polymer polyester can improve molding processability such as vacuum molding and pressure molding, biodegradable aliphatic polyester resins are not mentioned as polyesters. (3-Hydroxyalkanoate) copolymer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0106] The resins or additives used in this example are as follows.

[0107]A-1: PHBH

[0108] Poly[(3-hydroxybutyrate)-co-(3-hydroxyhexanoate)] (HH rate=12mol%, Mw=500,000)

[0109] B-2: PHBH

[0110] Poly[(3-hydroxybutyrate)-co-(3-hydroxyhexanoate)] (HH ratio=7mol%, Mw=500,000)

[0111] B-1: Acrylic modifier (manufactured by KANEKA, Kane Ace PA10, Mw=800,000)

[0112] B-3: Acrylic modifier (manufactured by Kaneka, Kane Ace PA40, Mw=6 million)

[0113] B-4: Acrylic modifier (manufactured by KANEKA, Kane Ace PA60, Mw=8 million)

[0114] C-1: nucleating agent behenic acid amide (manufactured by CRODA JAPAN, Incroslip B)

[0115] D-1: Hindered phenolic antioxidant (Irganox (Irganox)-1010, manufactured by Ciba Specialty Chemicals (Chiba Specialty Chemicals))

[0116] Furthermore, the PHBH used was Alcaligenes eutrophus obtained by introducing a PHA (polyhydroxyalkanoate) synthase gene derived from Aeromonas caviae into Alcaligenes eutrophus. Bacteria (Alcaligenes eutrophus...

Embodiment 1～12

[0132] Using the compounding ratio shown in Table 1, poly[(3-hydroxybutyrate)-co-( 3-hydroxyhexanoic acid ester)] (PHBH), the mixture of acrylic modifier, nucleating agent and antioxidant is melt-kneaded to obtain composition granules.

[0133] The obtained compositions were evaluated for drawability, tensile properties during vacuum molding, and burr properties during injection molding. The results are shown in Table 1.

Embodiment 13～15

[0166] The PHBH used was Alcaligenes eutrophus AC32 (J. Bacteriol., 179, 4821 (1997)) as microorganisms, PHBH produced by properly adjusting raw materials and culture conditions; HH rate is 12 mol%; Mw (weight average molecular weight) is about 500,000.

[0167] Other raw materials are used in conjunction with the raw materials and parts shown in tables 3 and 4.

[0168] With the compounding ratio shown in Table 3, (3-hydroxybutyrate)-(3- Hydroxyhexanoate) copolymer (PHBH), core-shell graft copolymer and / or acrylic modifier, nucleating agent and antioxidant mixture are melt-kneaded to obtain masterbatch 1-3 granules.

[0169] [table 3]

[0170] Combination of masterbatch

[0171]

[0172] (3-Hydroxybutyrate)-(3 -Hydroxycaproate) copolymer (PHBH), the obtained master batch, the mixture of nucleating agent and antioxidant are melt-kneaded to obtain the pellets of the resin composition.

[0173]For the pellets of the obtained composition, a single-screw extruder te...

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Abstract

Disclosed is a resin composition excellent in molding processability which comprises a plant-derived biodegradable plastic produced by actively fixing carbon dioxide present in the earth. A resin composition excellent in molding processability, comprising (A) a biodegradable (3-hydroxyalkanoate) copolymer having a repeated unit represented by the formula (1): [-CHR-CH2-CO-O-] (wherein R represents an alkyl group represented by the formula CnH2n+1 and n is an integer of 1 to 15) and (B) 0.1 to 100 parts by weight, based on 100 parts by weight of the biodegradable (3-hydroxyalkanoate) copolymer (A), of an acrylic modifier having a weight average molecular weight (Mw) of 500,000 to 10,000,000.

Description

technical field [0001] The present invention relates to a composition containing a plant-derived biodegradable polymer that can actively fix carbon dioxide on the earth and can be expected to prevent global warming, and a molded article obtained using the composition. More specifically, it relates to a composition and a molded article that contain a biodegradable aliphatic polyester resin (3-hydroxyalkanoate) copolymer and an acrylic additive and are excellent in moldability and the like. Background technique [0002] In the past, although plastic has the characteristics of processability and ease of use, on the other hand, it is difficult to recycle and has problems in hygiene, etc., and it is discarded after use. However, as plastics are used and discarded in large quantities, the problems caused by landfill or incineration are becoming more and more urgent. The impact on the ecosystem caused by the shortage of landfills and non-degradable plastics remaining in the environ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K5/053C08K5/20C08K5/21C08L33/08C08L51/06C08L101/16
CPCC08K5/20C08K5/1345C08L33/08C08K5/0008C08L51/00C08L67/04C08L33/06C08L2666/02C08L2666/04
Inventor 中村信雄青山泰三桥本芳彦铃木纪之
Owner KANEKA CORP
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