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Aliphatic polyester resin composition

A technology of polyester resin and aliphatic polyester is applied to an aliphatic polyester resin composition with excellent flexibility and high heat resistance, and the field of aliphatic polyester resin composition can solve the problem of low crystallization rate. , for a long time, it is difficult to make molded products with flexibility and heat resistance, etc.

Inactive Publication Date: 2007-07-18
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low crystallization rate, polylactic acid has a problem in that it must maintain the temperature at which crystallization can proceed for a long period of time after being melted at a temperature higher than the melting point, so that the molding operation takes a long time
According to the prior art, it is difficult to make molded articles such as film, sheet, wire or container with flexibility and heat resistance from polylactate resin

Method used

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  • Aliphatic polyester resin composition
  • Aliphatic polyester resin composition
  • Aliphatic polyester resin composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] To 100 parts by weight of polylactic acid (LACTY9800, manufactured by Shimadzu Corp.) with a weight average molecular weight of 120,000 was added 30 parts by weight of polyethylene glycol with a weight average molecular weight of 200, and the mixture was heated at 150° C. at 30 rpm using a Brabender mixer. Knead. To 100 parts by weight of this mixed resin was added 20 parts by weight of hydrophilic amorphous silica particles ("AEROSIL 200", with an average primary particle diameter of 12 nm, manufactured by Japan Aerosil Ltd.), and the mixture was kneaded again. The composition thus obtained was formed into a film at 150°C, the elastic modulus was measured, and the temperature dependence of the elastic modulus was measured. Using Rheometric RSAII (manufactured by RheometricScience Inc.), the elastic modulus was measured in the tension mode at a frequency of 1 Hz in the range of -50°C to 130°C.

Embodiment 2

[0054] The composition was prepared and the modulus of elasticity was measured according to Example 1, but the amount of the hydrophilic amorphous silica particles was changed to 40 parts by weight.

Embodiment 3

[0063] The composition was prepared according to Example 1, formed into a film, and the elastic modulus was measured, but the polyethylene glycol with a weight average molecular weight of 200 was changed to polyethylene glycol with a weight average molecular weight of 1000.

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Abstract

The present invention provides an aliphatic polyester resin, a plasticizer and hydrophilic silica particles are added in the amount within a range from 10 to 100 parts by weight based on 100 parts by weight of the total amount of the aliphatic polyester resin and the plasticizer. The polyester resin compositions exhibit flexibility and high heat resistance.

Description

Background of the invention [0001] The present invention relates to an aliphatic polyester resin composition having excellent flexibility and high heat resistance. [0002] Plastics are used in various fields due to their excellent chemical stability and high durability. However, it is precisely because of its stability that plastics cause problems with post-use disposal. This is a social problem caused by landfilling and incineration of waste plastics. Plastic disposed of in landfill does not decompose over time; therefore, more landfill is required. The overheating of waste plastics incineration will damage the incinerator. Moreover, waste plastics produce harmful substances. [0003] To solve these problems, there are known biodegradable resins which are easily decomposed into water and carbon dioxide by microorganisms in soil or water. In particular, aliphatic polyester resin is an excellent biodegradable resin, and when used as a general-purpose resin, it is easy to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/36C08K5/00C08L67/02C08L67/04C08L67/00C08K7/00
CPCC08K5/0016C08K3/36C08L67/02C08L67/00
Inventor 小林光明鳥海尚之
Owner 3M INNOVATIVE PROPERTIES CO
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