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Biodegradable polymer composition for the manufacture of articles having a high heat deflection temperature

A heat distortion temperature and biodegradation technology, applied in the field of heat distortion temperature products, can solve problems such as deformation, adverse effects on industrial processability, etc.

Active Publication Date: 2014-12-03
NOVAMONT SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, although this technique causes a significant increase in the heat deflection temperature of the article, it also causes its deformation
Therefore, special precautions have to be taken during the design and production phases of said articles, which has an adverse effect on their industrial processability

Method used

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  • Biodegradable polymer composition for the manufacture of articles having a high heat deflection temperature
  • Biodegradable polymer composition for the manufacture of articles having a high heat deflection temperature
  • Biodegradable polymer composition for the manufacture of articles having a high heat deflection temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] Table 1 - Compositions in Example 1

[0115]

[0116] Values ​​are expressed in parts when not explicitly indicated.

[0117] PLA = polylactic acid containing 98% L-lactic acid and 2% D-lactic acid, melting point Tm = 165°C, weight average molecular weight Mw = 166000, intrinsic viscosity = 0.97dl / g and shear viscosity = 120Pas, according to standard ASTM -D3835 at T=190℃, shear rate=1000s -1 Measured with capillary D=1 mm and L / D=10.

[0118] AAPE = poly(butylene sebacate-co-butylene terephthalate) (PBST) containing 56 mole % terephthalic acid relative to the total amount of aliphatic and aromatic diacids, And have MFI=14g / 10min (190 ℃ and 2.16kg), and shear viscosity η=570Pas, according to standard ASTM-D3835 at T=180 ℃, shear rate=104s -1 Measured with capillary D=1 mm and L / D=30.

[0119] Anti-caking agent = vegetable sourced oleamide

[0120] Nucleating agent = micronized talc (particle size = 2-10 microns)

[0121] Cellulose fiber = 100% pure cellulose fi...

Embodiment 2

[0142] The molded samples were then subjected to an annealing treatment in an unconfined environment in a Venti-Line VL115 model furnace with circulating air using the following operating conditions: temperature = 90°C, time = 60 minutes.

[0143] After cooling and further conditioning for 1 day at T=23° C. and 55% RH, the annealed specimens were then investigated to determine dimensional stability, mechanical properties and heat distortion temperature HDT.

[0144] The results of this characterization are shown in Tables 5-7.

Embodiment 3-5

[0146] The molded test pieces according to Example 1 were subjected to three different annealing treatments using the operating conditions shown in Table 3:

[0147] Table 3 - Annealing Conditions

[0148]

[0149] After cooling and reconditioning for 1 day at T=23°C and 55% RH, the annealed samples were studied to determine their dimensional stability (PDC) and heat deflection temperature (HDT) (Tables 6-7).

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Abstract

This invention relates to a biodegradable polymer composition which is particularly suitable for use in the manufacture of articles having a high heat deflection temperature (HDT) by injection moulding and thermoforming.

Description

technical field [0001] The present invention relates to biodegradable polymer compositions which are particularly suitable for the manufacture of articles having a high heat deflection temperature (HDT) by injection molding and thermoforming. [0002] The invention also relates to processes for the preparation of said compositions and articles obtained therefrom. Background technique [0003] Polylactic acid is a biodegradable thermoplastic polyester derived from renewable sources. Its mechanical properties make it an ideal candidate to replace conventional thermoplastic polymers, especially in applications where high rigidity is required, such as in the manufacture of disposable tableware, rigid containers or caps for beverage containers. [0004] Although polylactic acid can be used in standard machinery with minimal modifications, some of its properties have so far prevented its widespread and comprehensive use as a replacement for conventional thermoplastics. [0005] ...

Claims

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Application Information

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IPC IPC(8): C08L67/04
CPCC08L67/04C08L67/02B29C45/0001B29C51/002B29C51/42B29C71/02B29C2071/022B29K2067/046B29K2105/0005B29K2105/0085B29K2105/0088B29K2995/0016B29K2995/006C08L2201/06C08L2201/08C08L2203/30C08L2205/02C08L2205/03C08L2205/24C08L2207/04
Inventor N·马瑞尼A·拉里斯
Owner NOVAMONT SPA
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