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Resin composition, and method for producing the same

A technology of resin composition and polymer, which is applied in the field of preparing the resin composition and poly-3-hydroxybutyrate polymer resin composition, can solve the problems of poor heat resistance and no impact resistance

Inactive Publication Date: 2006-05-17
TOSOH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the method of mixing different types of polymers proposed in the above patent application, the composition thus obtained does not have sufficient impact resistance and is poor in heat resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0044] The preparation method of the resin composition of the present invention can use any method and apparatus as long as the PHB polymer and the core-shell latex rubber or thermoplastic polyurethane can be mixed. Among these methods, from the viewpoint of obtaining a composition having good moldability, a method prepared using a kneader in which the temperature of the molten resin discharged from the die of the extruder is set at 160 to 185° C. is preferably employed. The kneader used is not particularly limited, and examples of the kneader include co-rotating twin-screw extruders, counter-rotating twin-screw extruders such as conical twin-screw extruders, batch type mixers such as Banbury mixers, or pressure kneaders kneader and roll kneader. From the viewpoint of obtaining a composition exhibiting excellent impact resistance and heat resistance, it is preferable to use, among them, a counter-rotating twin-screw extruder equipped with a strong kneading type screw such as a...

Embodiment 1

[0084] Melt extrusion with a counter-rotating twin-screw extruder (trade name: LABOPLASTMILL, product of Toyo Seiki Seisakusho, resin temperature: 178° C., number of revolution: 100 rpm, using a strong kneading type screw) equipped with a circular die Press-mix 70% by weight of poly-3-hydroxybutyrate (trade name: Biocycle 1000, product of PHB Industrial S / A) which has been predried in an oven at 80° C. for 4 hours and 30% by weight of polyformaldehyde-containing A core-shell latex rubber (trade name: METABLENW-450A, product of Mitsubishi Rayon Co.) of methyl acrylate as a shell component and acrylic rubber as a core component. The resulting extruded tape was cured in a heat bath set at 60°C. The resulting solid tape was pelletized with a tape cutter to obtain a pellet-shaped resin composition.

[0085] The crystallization temperature, crystal melting temperature, and average molecular weight of chloroform-soluble components of the resulting resin composition were measured. I...

Embodiment 2

[0089] A pellet-shaped resin composition was obtained in the same manner as in Example 1 above, except that 70% by weight of poly-3-hydroxybutyrate and 30% by weight of core-shell used in Example 1 were added to 100 parts by weight of To the latex rubber mixture was added 10 parts by weight of di-2-ethylhexyl phthalate (DOP).

[0090] The crystallization temperature, crystal melting temperature, and average molecular weight of chloroform-soluble components of the resulting resin composition were measured. In addition, Izod impact strength and Vicat softening temperature were measured using injection molded test pieces. In addition, the number of core-shell latex rubber aggregates with a diameter exceeding 1 μm present on an arbitrarily selected 10 μm×10 μm field of view was counted by observation through a transmission electron microscope using a compression-molded sample. The results obtained are shown in Table 1 below.

[0091] In addition, dynamic viscoelasticity was meas...

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PUM

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Abstract

The present invention discloses a resin composition having excellent impact resistance and heat resistance, which comprises poly-3-hydroxybutyrate and core-shell latex rubber or specific thermoplastic polyurethane, the core-shell latex rubber Contains acrylic rubber and / or silicone-acrylic rubber copolymer as core component and polymethyl methacrylate as shell component. The resin composition meets the following requirements (c) and (d): (c) when heated from room temperature to 180° C. at a rate of 80° C. / min by a differential scanning calorimeter, kept at 180° C. for 1 minute, and then When cooled at a cooling rate of 10°C / min, the crystallization temperature is 110 to 170°C; and (d) when the chloroform-soluble content is measured by gel permeation chromatography, the weight average molecular weight (Mw) in terms of polystyrene is 100,000 -3,000,000.

Description

technical field [0001] The present invention relates to a resin composition comprising a poly-3-hydroxybutyrate polymer and a core-shell latex rubber or thermoplastic polyurethane, and a method for preparing the resin composition. More particularly, the present invention relates to a poly-3-hydroxybutyrate polymer resin composition having excellent impact resistance and heat resistance, and a method for preparing the resin composition. Background technique [0002] Since poly-3-hydroxybutyrate polymers are obtained using plants as raw materials, this polymer has recently attracted attention as a material with little environmental load. However. Poly-3-hydroxybutyrate polymers suffer from poor impact resistance. [0003] In order to overcome this problem, as described in, for example, JP-A-9-194281 and JP-A-11-323141, methods of mixing polycaprolactone or polybutylene succinate resins have been proposed. [0004] However, in the method of mixing different types of polymers...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L33/12
Inventor 山口政之
Owner TOSOH CORP
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