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Sulfonated aliphatic-aromatic copolyesters and shaped articles produced therefrom

A technology of sulfonated grease and copolyester, which is applied in the field of formed articles, and can solve the problems of low heat performance and insufficiency

Inactive Publication Date: 2009-11-11
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been found that such materials typically have insufficient or lower thermal properties than desired for some applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0160] experiment method

[0161] Unless otherwise specified, the following test methods were used in the following Examples and Comparative Examples.

[0162] Differential scanning calorimetry (DSC) was performed on a TA Instruments Model Number 2920 machine. The sample was heated to 300°C at a rate of 20°C / min under a nitrogen atmosphere, cooled back to room temperature at a rate of 20°C / min, and then heated to 300°C at a rate of 20°C / min. The glass transition temperature (Tg) and crystalline melting temperature (Tm) of the samples observed below are from the second heating.

[0163] Inherent viscosity (IV) is defined in "Preparative Methods of Polymer Chemistry", W.R. Sorenson and T.W. Camp Dell, 1961, p.35. It is determined by the Goodyear R-103B method at room temperature at a concentration of 0.5 g / 100 mL of a 50:50 wt% trifluoroacetic acid-dichloromethane acid solvent system.

[0164] Laboratory relative viscosity (LRV) is the ratio of the viscosity of a solution o...

Embodiment 1

[0180] To a 250 mL glass flask was added bis(2-hydroxyethyl) terephthalate (88.35 g), ethylene glycol (6.52 g), dimethyl-3-sodium isophthalate (0.74 g), Dimethyl glutarate (24.03 g), manganese (II) acetate tetrahydrate (0.042 g), and antimony (III) trioxide (0.034 g). The reaction mixture was stirred and heated to 180°C under a slow nitrogen purge. After reaching 180°C, the reaction mixture was heated to 275°C over 3.5 hours with stirring under a slow nitrogen purge. The resulting reaction mixture was stirred at 275° C. for 1 hour under a slight nitrogen purge. 8.5 g of colorless distillate were collected during this heating cycle. The reaction mixture was then evacuated to full vacuum in stages with stirring at 275°C. The resulting reaction mixture was stirred under full vacuum (pressure less than 100 mtorr) for 2.2 hours. The vacuum was then released with nitrogen and the reaction mass was allowed to cool to room temperature. An additional 12.3 g of distillate was recov...

Embodiment 2

[0184] To a 250 mL glass flask was added bis(2-hydroxyethyl) terephthalate (88.86 g), ethylene glycol (6.27 g), dimethyl-3-sodium isophthalate (0.15 g), Dimethyl glutarate (24.03 g), manganese (II) acetate tetrahydrate (0.042 g), and antimony (III) trioxide (0.034 g). The reaction mixture was stirred and heated to 180°C under a slow nitrogen purge. After reaching 180°C, the reaction mixture was heated to 275°C over 3.6 hours with stirring under a slow nitrogen purge. The resulting reaction mixture was stirred at 275° C. for 1 hour under a slight nitrogen purge. 12.8 g of colorless distillate were collected during this heating cycle. The reaction mixture was then evacuated to full vacuum in stages with stirring at 275°C. The resulting reaction mixture was stirred under full vacuum (pressure less than 100 mtorr) for 2.4 hours. The vacuum was then released with nitrogen and the reaction mass was allowed to cool to room temperature. An additional 7.0 g of distillate was recov...

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PUM

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Abstract

Sulfonated aliphatic-aromatic copolyesters are provided. The copolyester is produced from a mixture of aromatic dicarboxylic acids, aliphatic dicarboxylic acids, ethylene glycol, other diols, and components containing alkali metal or alkaline earth metal sulfo groups such as metal 5-sulfo Phthalic acid derivatives. The copolyesters have lower sulfonation than known sulfonated polyesters and provide advantageous thermal properties for some end uses. The sulfonated aliphatic-aromatic copolyesters are useful for forming coatings or films on various substrates, and for packaging. Some compositions comprising the sulfonated aliphatic-aromatic copolyesters are biodegradable, as are some sulfonated aromatic-aromatic copolyesters.

Description

technical field [0001] This invention relates to sulfonated aliphatic-aromatic copolyesters and shaped articles produced therefrom. Background technique [0002] The combination of inadequate treatment of municipal solid waste sent to landfills and increasing non-degradable materials, including plastics, in the municipal solid waste stream is dramatically reducing the number of available landfills and increasing municipal solid waste. Waste disposal costs. While recycling of reusable components of the waste stream is desirable in many instances, the cost of recycling and the infrastructure required to recycle the materials can sometimes be prohibitively expensive. Furthermore, there are some products that cannot be easily incorporated into a recycling framework. Composting of non-recyclable solid waste is a recognized and growing method of reducing solid waste landfill volume and / or making useful products from waste to improve the fertility of fields and gardens. One of t...

Claims

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Application Information

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IPC IPC(8): C08G63/688B32B27/36C08K3/00C08K13/04C08L67/02D01F6/84D01F8/14D21H19/28D21H19/62D21H27/10
CPCD01F8/14D21H19/28C08K13/04Y10T428/2949D21H19/62C08L67/02D21H27/10Y10T428/249921C08K3/0033B32B27/36Y10T428/31786D01F6/84C08G63/6886C08K3/013C08L2666/02
Inventor R·A·海斯
Owner EI DU PONT DE NEMOURS & CO
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