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Polyether ester hot-melt adhesive and preparation method thereof

A polyester hot-melt adhesive and hot-melt adhesive technology, used in adhesives and other directions, can solve the problems of easy thermal oxygen aging, hot melt adhesive bubbles, polyether easy to absorb water, etc., and achieve thermal oxygen aging low temperature flexibility, good low temperature flexibility Effect

Inactive Publication Date: 2016-06-15
上海理日化工新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the above patented technology, since the polyether ester contains a large amount of ether bond components, it is easy to thermal oxygen aging, and the polyether is easy to absorb water, and the hot melt adhesive will be hydrolyzed due to the action of water during storage and use. Causes the hot melt adhesive to produce a large number of bubbles during heating and use, which affects the use

Method used

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  • Polyether ester hot-melt adhesive and preparation method thereof
  • Polyether ester hot-melt adhesive and preparation method thereof
  • Polyether ester hot-melt adhesive and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0046]The preparation method of the polyester hot melt adhesive of the present invention: the above-mentioned dibasic acid and dibasic alcohol are subjected to esterification reaction together under the action of a catalyst, and the reaction temperature ranges from 120 to 250°C, preferably from 180 to 220°C. In order to improve the reaction conversion rate and achieve the above-mentioned ratio of the total molar number of dicarboxylic acid copolymerized units to the total molar number of dibasic alcohol copolymerized units, the chemical reaction of dibasic alcohols (especially aliphatic dibasic alcohols) is generally used in the reaction raw materials. Meter slightly overdose. Therefore, in a particularly preferred embodiment, the total molar ratio of the above-mentioned dibasic acid and dibasic alcohol in the reaction raw materials of the polyester hot melt adhesive of the present invention is 1:(1.1~2.2), preferably 1:(1.6~ 1.9).

[0047] Conventional catalysts in the art c...

Embodiment

[0057] The following examples are used to further illustrate the present invention, but it should be understood that these examples cannot be used to limit the protection scope of the present invention.

[0058] The polyether ester hot-melt adhesive prepared in each embodiment or comparative example tests various properties according to the following methods:

[0059] Melt viscosity test: the melt viscosity of the sample at 232° C. was tested with a Brookfield DV-E rotational viscometer.

[0060] Increased viscosity test: According to the national standard GB / T1632-93, use the Ubbelohde viscometer method to perform the increased viscosity test to characterize its molecular weight. The solvent used is phenol-tetrachloroethane (weight ratio: 1:1) , the measured synthetic viscosity is greater than 0.37

[0061] Melting point and glass transition temperature test: DSC method test, after eliminating the heat history, increase the temperature at a heating rate of 20°C / min, and test...

Embodiment 1

[0074] Add 242g terephthalic acid, 12g isophthalic acid, 1,4-butanediol 300g, polyethylene glycol (reagent, Molecular weight 2000) 40g, dimer acid (CrodaPripol1013) 152g, hydroxyalkyl-terminated organosilicon compound (Tech-2120 of Shanghai Tiger Polymer Co., Ltd., molecular weight 2000) 4g, n-butyl titanate 0.23g, phosphorous acid Triphenyl ester 0.2g. Stir and heat to raise the temperature. When the temperature in the kettle reaches 180-190°C, the esterification starts, and slowly raise the temperature in the kettle to 220°C, keep the distillation temperature at 95-100°C, collect the distilled water to 64g, and the esterification ends , add 5g of antioxidant IRGONAX1010 and raise the temperature to 250°C, turn on the vacuum pump, carry out the polycondensation reaction under the vacuum of 100pa in the kettle, discharge the material after the reaction, the measured specific viscosity is 0.39, the weight average molecular weight is 31000, and the melt viscosity is 21500cps, T...

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Abstract

The invention relates to a polyether ester hot-melt adhesive and a preparation method thereof. The polyether ester hot-melt adhesive contains a dicarboxylic acid copolymerization unit and a diol copolymerization unit, wherein the dicarboxylic acid copolymerization unit contains a phthalic acid copolymerization unit, a C2-C12 aliphatic dicarboxylic acid copolymerization unit and a C32-40 dimeric acid copolymerization unit, and the diol copolymerization unit contains a C2-C10 aliphatic diol copolymerization unit, a polyether diol copolymerization unit and a hydroxyalkyl modified organosilicon compound copolymerization unit. The polyether ester hot-melt adhesive disclosed by the invention has the advantages of low viscosity and excellent hydrolysis resistance, thermo-oxidative aging resistance and low-temperature flexibility, is particularly applicable to the adhered sealing of paper filter elements of automobile filters and the preparation of hot-melt adhesive films and can also be applied to the aspect of adhering of textiles.

Description

technical field [0001] The invention relates to a hot-melt adhesive and a preparation method thereof, in particular to a polyether ester hot-melt adhesive and a preparation method thereof. Background technique [0002] In the prior art, polyether esters are mostly used in the fields of fiber materials and engineering plastics, but they are also used in the field of hot-melt adhesives, such as patent CN96104247.8 (polyether esters used for textile bonding). Polyalkylene ether glycol is added into the polyether ester hot melt adhesive system to copolymerize polyether ester, although this patent solves the heat and oxygen aging resistance of polyether ester by adding additives; as in patent CN201110388483.3 (a kind of polyether ester for textile adhesive bonding), this patent also adopts adding polyalkylene ether glycol to obtain polyether ester in the traditional polyether ester hot-melt adhesive formula, and the polyether of gained Esters are less vulnerable to processing an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J167/02C08G63/695C08G63/85
Inventor 顾庆锋
Owner 上海理日化工新材料有限公司
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