Water-soluble polyester for textile size and preparation method of water-soluble polyester

A water-soluble polyester, textile pulp technology, applied in textiles, papermaking, fiber processing, etc., can solve problems such as inability to meet production needs, incomplete desizing, and low glass transition temperature.

Inactive Publication Date: 2012-07-25
山东巨业精细化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the water-soluble polyester for sizing still has the following problems: (1) the low glass transition temperature of the product causes the product to cause adhesion due to friction and heat during the pulverization stage of production, which cannot meet the needs of production; The fiber absorbs moisture and sticks again in the humid environment in summer, so the content of hydrophilic groups needs to be reduced, resulting in incomplete desizing and affecting the use of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] With 1000kg terephthalic acid (PTA), 500kg ethylene glycol (EG), 0.7kg sodium acetate, 0.5kg of ethylene glycol solution containing 10wt% 80nm nano-barium sulfate, polymerization catalyst antimony trioxide 0.35kg, stabilizer Put 0.20kg of trimethyl phosphate into the beating kettle for beating, and after beating evenly, move it into the esterification reaction kettle for esterification under normal pressure at a temperature of 250-260°C, and the reaction is completed with 215kg of esterification effluent. Move into the polymerization reactor, add the ethylene glycol solution (SIPE weight content 40% in the solution, hereinafter referred to as SIPE40) of the isophthalic acid-5-sodium sulfonate ethylene glycol ester (SIPE) of 800kg, stir 60 minutes, add 100kg Polyethylene glycol (PEG1000) with an average molecular weight of 1000, stirred for 30 minutes, pre-condensed at a low vacuum of 4000-500Pa at a temperature of 260-270°C, then polymerized at a high vacuum of 500-200Pa...

Embodiment 2

[0042] Embodiment 2: As in embodiment 1, the difference is to add 650kg of SIPE40. The results are shown in Table 1.

Embodiment 3

[0043] Embodiment 3: As in embodiment 1, the difference is that adding 100 kg of polyethylene glycol (PEG1500) with an average molecular weight of 1500. The results are shown in Table 1.

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Abstract

The invention relates to a water-soluble polyester for textile size and a preparation method of the water-soluble polyester. The water-soluble polyester disclosed by the invention uses terephthalic acid and ethylene glycol to constitute a main repeating unit, namely ethylene terephthalate, and contains phthalate-5-sulphonate or a derivative thereof accounting for 8-20% of the mole number of the terephthalic acid, and calculated by the weight of the terephthalic acid, 3-20% of polyethylene glycol, 0.03-0.3% of acetate and 0.001-0.03% of inorganic nanoparticles are added. The intrinsic viscosity of the water-soluble polyester is 0.25-52dL/g, and the glass transition temperature is 35-55 DEG C. The water-soluble polyester can prevent adhesion during crushing and meet the requirements of continuous production; and the obtained product can be sized under moist environmental conditions in summer, and sized fiber fabric can be desized thoroughly.

Description

technical field [0001] The invention relates to a water-soluble polyester and a preparation method thereof, in particular to a water-soluble polyester suitable for textile sizing and a preparation method thereof, and belongs to the technical field of polymer materials. Background technique [0002] At present, the sizing materials for sizing polyester and polyester-cotton staple fibers in the textile industry are mainly modified starch, polyvinyl alcohol (PVA), and polyacrylates. Polyester is a hydrophobic highly oriented crystalline polymer, and its physical and chemical properties are quite different from those of existing textile sizes. Starch sizing is a natural polysaccharide polymer, which has little adhesion to polyester fibers and poor sizing effect; PVA has good sizing effect on polyester fibers, but environmental pollution has become a major problem. Because PVA is difficult to biodegrade, some countries in Europe have banned the use of PVA sizing, which is called...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/688C08G63/78C08K3/30C08K3/36C08K3/34C08K5/56D06M15/507D06M11/79D06M11/56
Inventor 高鑫王国德
Owner 山东巨业精细化工有限公司
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