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Water-soluble copolyester and preparation method thereof

A copolyester, water-soluble technology, applied in the field of preparation of water-soluble copolyester, achieves the effects of good water-soluble stability and excellent water-solubility

Inactive Publication Date: 2012-10-31
苏州瀚海化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The preparation of water-soluble polyester in the prior art is mainly to provide hydrophilicity by adding the third monomer isobenzenesulfonate and other ionic groups. The acquisition and improvement of water solubility has always been an important topic in the research of water-soluble polyester. So far, most of the research is to add hydrophilic monomers on the existing basis, but there are few studies on dicarboxylic acids such as terephthalic acid

Method used

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  • Water-soluble copolyester and preparation method thereof
  • Water-soluble copolyester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Put 2.66kg of isophthalic acid, 4.74kg of dimethyl isophthalate-5-sodium sulfonate, 19.84kg of ethylene glycol and 19.97kg of furandicarboxylic acid into a 100L stainless steel reaction kettle, and add 30g of zinc acetate, 20g of tetrabutyl titanate, under nitrogen system, heat up to 180-200°C for 1.5 hours, then gradually raise the temperature to 220-240°C for 3.5 hours, when the amount of by-products collected reaches 5.9kg, the esterification reaction ends. Add 28g of antimony acetate and 13g of triphenyl phosphate, and gradually reduce the pressure to below 100Pa within 0.5 hours to carry out polycondensation reaction. The polymer product was obtained after 5 hours of reaction.

[0031] The product is analyzed by DSC, and the measured glass transition temperature (Tg) is 46°C; at 35°C, the intrinsic viscosity is 0.44dL / g;

Embodiment 2

[0033]Put 15.96kg of terephthalic acid, 2.66kg of isophthalic acid, 4.74kg of dimethyl isophthalate-5-sodium sulfonate, 14.88kg of ethylene glycol and 4.99kg of furandicarboxylic acid into a 100L stainless steel reaction kettle , and add 30g of zinc acetate and 20g of tetrabutyl titanate. Under nitrogen system, raise the temperature to 180-200°C for 1 hour, and then gradually raise the temperature to 220-240°C for 2.5 hours. When the amount of by-products collected reaches 5.9kg When the esterification reaction ends. Add 28g of antimony acetate and 13g of triphenyl phosphate, and gradually reduce the pressure to below 100Pa within 0.5 hours to carry out polycondensation reaction. The polymer product was obtained after 4 hours of reaction.

[0034] The product is analyzed by DSC, and the measured glass transition temperature (Tg) is 50°C; at 35°C, the intrinsic viscosity is 0.39dL / g;

Embodiment 3

[0036] Put 10.64kg of terephthalic acid, 2.66kg of isophthalic acid, 4.74kg of dimethyl isophthalate-5-sodium sulfonate, 14.88kg of ethylene glycol, 3.39kg of diethylene glycol and 9.98kg of furandicarboxylic acid into the In a 100L stainless steel reaction kettle, add 30g of zinc acetate and 20g of tetrabutyl titanate. Under a nitrogen system, raise the temperature to 180-200°C for 1.5 hours, then gradually raise the temperature to 220-240°C for 3 hours. When collected The esterification reaction ended when the by-product amount reached 5.9 kg. Add 28g of antimony acetate and 13g of triphenyl phosphate, and gradually reduce the pressure to below 100Pa within 0.5 hours to carry out polycondensation reaction. The polymer product was obtained after 4.5 hours of reaction.

[0037] The product is analyzed by DSC, and the measured glass transition temperature (Tg) is 43°C; at 35°C, the intrinsic viscosity is 0.42dL / g;

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Abstract

The invention discloses a water-soluble copolyester and a preparation method thereof. The invention is characterized in that the water-soluble copolyester is obtained by sequentially carrying out esterification or ester exchange reaction and polycondensation reaction on dicarboxylic acid or esters thereof, m-benzenesulfonate, 2,5-furyl-diformic acid and dibasic alcohol as raw materials; the glass transition temperature of the water-soluble copolyester is 30-60 DEG C; and under the condition of 35 DEG C and orthochlorophenol as a solvent, the intrinsic viscosity of the water-soluble copolyester is at least 0.25 dL / g. By partially or totally substituting terephthalic acid with biomass-base 2,5-furyl-diformic acid, the technique reduces the consumption of the fossil raw material, and the water-soluble polyester has better environment-friendly characteristic and sustainable development performance, and has higher water solubility.

Description

technical field [0001] The invention belongs to the field of polymer material synthesis, and in particular relates to the preparation of a water-soluble copolyester containing furandicarboxylic acid from biomass. Background technique [0002] Polyester is a polymer resin obtained by esterification or transesterification of polybasic acid or its ester and polyol components. Water-soluble polyester is to introduce hydrophilic groups into the polyester chain to make it hydrophilic. Water-based, has been widely used in many fields such as textile size, water-based paint and water-based baking varnish. [0003] The main raw material for the preparation of water-soluble polyester in the prior art is terephthalic acid. Although the current production of terephthalic acid is large and can meet the demand, it is a product from fossil resources, and the production process will generate a large amount of carbon emissions. , with the depletion of petroleum resources and the continuous ...

Claims

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Application Information

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IPC IPC(8): C08G63/688C08G63/78
Inventor 金旭叶同奇黄志远曲晓飞许峰
Owner 苏州瀚海化学有限公司
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