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Polyester resin resulting from copolymerisation of lactic acid and isosorbide, and production method therefor

A technology of polyester resin and isosorbide, applied in the field of polyester resin and its preparation, can solve problems such as difficulty in enhancing heat resistance, and achieve good heat resistance, color, and environment-friendly effects

Active Publication Date: 2013-12-18
SK CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for this co-polymerized polyester, it is difficult to enhance its heat resistance through stretching or crystallization process

Method used

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  • Polyester resin resulting from copolymerisation of lactic acid and isosorbide, and production method therefor
  • Polyester resin resulting from copolymerisation of lactic acid and isosorbide, and production method therefor

Examples

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preparation example Construction

[0020] The preparation method of the polyester resin of the present invention will be described in detail below. First (a) polymerization reaction, including at a pressure of 0.1 to 3.0kgf / cm 2, at a temperature of 200-300°C to make (i) dibasic acid components including terephthalic acid, and if necessary, aromatic and aliphatic dicarboxylic acid compounds; Glycol component 1-60mol% of isosorbide and 1-90mol% of ethylene glycol, if necessary, other glycol compounds, and (iii) the weight content of 1-50 wt% of lactic acid or lactic acid derivatives in the total resin polymerization reactant undergo esterification reaction or transesterification reaction, and the average reaction time is 100 minutes to 10 hours. Then, (b) subject the esterification reaction or transesterification reaction product to polycondensation reaction (polycondensation) under the conditions of pressure reduced to 400 to 0.1mmHg and temperature of 240 to 300°C to produce the polyester resin of the present...

Embodiment 1～6

[0030] Embodiment 1~6: Preparation of polyester resin

[0031] Except for the different contents of the reactants shown in Table 1, the preparation method of the polyester resin in the examples is exactly the same as that in the comparative examples. The biomass content (%), intrinsic viscosity, heat resistance (Tg), color L (color L), and color b (color b) of the prepared polyester resin were measured, and the data are shown in Table 1.

[0032] [Table 1]

[0033]

[0034] In Table 1, all dibasic acids and diols were used in the preparation of polyesters. As shown in Table 1, compared with conventional polyester resins, the polyester resins containing lactic acid or lactic acid derivatives of the present invention have a high biomass content while having the same or higher heat resistance. In particular, the polyester resins in Comparative Examples 1 to 3 prepared using isosorbide are high heat-resistant resins, their Tg and biomass content are high, but the color L and...

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Abstract

Disclosed is: a polyester resin which results from the copolymerisation of lactic acid or a compound derived therefrom and isosorbide, and the polyester resin not only has a high content of compounds derived from biomass but also has outstanding heat resistance and colouration. Also provided is a production method for the polyester resin. The polyester resin is prepared from the copolymerisation of: a dicarboxylic acid component comprising terephthalic acid; a diol component comprising isosorbide in an amount of between 1 and 60 mol% and ethylene glycol in an amount of between 1 and 90 mol% with respect to the overall diol content; and lactic acid or a compound derived therefrom in an amount of between 1 and 50 wt.% with respect to the overall resin polymerisation reaction product. The polyester resin has a structure involving the repetition of a dicarboxylic acid moiety derived from the dicarboxylic acid component, a diol moiety derived from the diol component, and a hydroxy monocarboxylic acid moiety derived from the lactic acid or the compound derived therefrom.

Description

technical field [0001] The present invention relates to a kind of polyester resin and its preparation method, especially a kind of polyester resin with good heat resistance and color and its preparation method, due to the copolymerization of lactic acid or lactic acid derivative and isosorbide, the polyester The resin has a high content of compounds of biomass origin. Background technique [0002] Commonly used resins such as polyester, polycarbonate, polystyrene, polyethylene, polypropylene, styrene acrylic copolymer are all derived from fossil energy sources such as petroleum. Recently, efforts are being made to reduce the use of fossil energy in order to cope with the consumption of fossil energy, the increase in the concentration of carbon dioxide in the atmosphere due to the massive use of petroleum energy, and global warming. For example, when resins derived from plants are used, carbon dioxide is emitted into the atmosphere during plant growth, and carbon dioxide cir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/08C08G63/183C08G63/78C08L67/04
CPCC08G63/66C08G63/60C08G63/08C08G63/18C08G63/181C08G63/183C08G63/78C08J5/18C08L67/02C08L67/04
Inventor 金东鎭金钟亮
Owner SK CHEM CO LTD