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Aqueous copolyester hot melt adhesive and preparation method thereof

A copolyester, hot-melt technology, used in adhesives and other directions, can solve the problems of slow crystallization rate of hot-melt polyester, environmental pollution of solvent-based polyester, insufficient initial tack strength, etc. Good initial adhesion strength, good adhesive strength

Inactive Publication Date: 2011-11-23
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

[0003] The purpose of the present invention is to provide a water-based copolyester hot-melt adhesive, which solves the problem of slow crystallization rate of hot-melt polyester in the prior art, insufficient initial bonding strength and easy brittleness; Environmental pollution and other issues

Method used

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  • Aqueous copolyester hot melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～7

[0023] The preparation of embodiment 1~7 aqueous copolyester hot-melt type adhesive and conventional adhesive

[0024] Table 1 is that embodiment 1~6 is the specific formula that the present invention prepares water-based copolyester hot-melt adhesive, and preparation process is roughly the same, but raw material component has change, and embodiment 7 is a comparative example, wherein does not adopt polyester Polycondensation of caprolactone.

[0025] The formula of the hot-melt adhesive of table 1 embodiment 1~7 and the performance parameter of measurement

[0026]

[0027] Process steps:

Embodiment 1

[0028] Example 1 is prepared in this way: 1.25mol of terephthalic acid, 0.19mol of sebacic acid, 0.16mol of sodium isophthalic acid-5-sulfonate, 0.8mol of ethylene glycol and 1.4mol of butanediol are put into the reaction In the still, and add manganese acetate 0.28g, in the nitrogen atmosphere environment, heat up to 250 ℃ and keep warm to carry out reaction for about 3 hours, when the by-product amount reaches nearly 99% of the theoretical amount, finish the reaction. Cool down to 200°C, add 0.1g of antimony acetate, 0.1g of tetrabutyl titanate, 0.15g of triphenyl phosphate, 0.12g of sodium acetate and 40g of polycaprolactone, continue to raise the temperature and slowly depressurize to 100Pa , the temperature is controlled between 265 ~ 275 ℃, and the polycondensation reaction is carried out. Sampling analysis, when the viscosity of the polymer reaches the expected value, the stirring is stopped, the vacuum is eliminated, and the product is discharged to obtain a water-solu...

Embodiment 8

[0032] Embodiment 8 Preparation of water-based copolyester hot-melt adhesive and conventional adhesive

[0033] Put 1.30mol of dimethyl terephthalate, 0.11mol of sebacic acid, 0.19mol of sodium isophthalic acid-5-sulfonate, 0.85mol of ethylene glycol and 1.5mol of butanediol into the reaction kettle, and add Zinc acetate 0.2g, in nitrogen atmosphere environment, heat up to 210 ℃ and keep it warm for reaction for about 1 hour, then heat up to 230 and react for about 2 hours, when the amount of by-products reaches 99% of the theoretical amount, the reaction ends. Cool down to 200°C, add 0.09g of antimony acetate, 0.12g of tetrabutyl titanate, 0.17g of triphenyl phosphate, 0.15g of sodium acetate and 65g of polycaprolactone, continue to raise the temperature and slowly reduce the pressure to 100Pa , the temperature is controlled between 270 and 275°C for polycondensation reaction. Sampling analysis, when the viscosity of the polymer reaches the expected value, the stirring is st...

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Abstract

The invention discloses an aqueous copolyester hot melt adhesive, which is characterized in that: the adhesive is prepared by using dicarboxylic acid / dicarboxylic acid ester, m-benzene sulfonate and diol as raw materials and by first performing esterification or ester exchange and then adding polycaprolactone to perform polycondensation, wherein the glass transition temperature of the water soluble copolyester is between -10 and 20 DEG C; and at 35 DEG C, o-chlorophenol is used as a solvent, and the inherent viscosity of the copolyester is not less than 0.25 dL / g. The obtained adhesive has high water dispersibility, can crystallize and cure quickly and is environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of polymer adhesives, in particular to a method for preparing a water-based copolyester hot-melt adhesive Background technique [0002] Polyester has excellent properties such as heat resistance, cold resistance, and thermal stability, so it is widely used in the adhesive industry. Its varieties mainly include solvent type, water soluble type and hot melt type. The use of solvent-based products is restricted to a certain extent because of their VOC emissions. Hot-melt products do not require a fluid carrier and are not soluble in water. In actual application, the apparent viscosity is high and the construction requirements are high. It is difficult to obtain a thin and uniform adhesive coating, and the bonded objects are also difficult to recycle and separate. Patent CN1416456A proposes a water-dispersible hot-melt adhesive containing branched sulfonated copolyester, which is applied to disposable diapers,...

Claims

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Application Information

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IPC IPC(8): C09J167/02C09J167/04C08G63/688C08G63/78
Inventor 金旭宁珅贾林黄志远
Owner 苏州瀚海化学有限公司
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