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Preparation method of polyester polyol for high-temperature resistant polyurethane adhesives, and adhesive prepared by using same

A polyurethane adhesive, polyester polyol technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of easy hydrolysis, poor heat resistance, etc., to broaden the scope of application , The effect of improving heat resistance stability and bonding strength, and prolonging service life

Inactive Publication Date: 2020-02-04
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, polyurethane adhesives are prone to hydrolysis, degumming and softening in high temperature environments, showing poor heat resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation method of described high temperature resistant polyurethane adhesive polyester polyol is as follows:

[0033] Put 1.15mol of 1,2-propanediol, 0.128mol of trimethylolpropane, 0.1mol of AA, 0.9mol of PTA, and 0.024mol of isophthalic acid-5-sodium sulfonate in a reactor, stir evenly, and Under a nitrogen atmosphere, the temperature of the system was programmed to rise at a rate of 10°C / h; when it reached 180°C, 0.01wt.% tetra-n-butyl titanate was added, and the temperature continued to rise for esterification and dehydration; when it reached 230°C, The water output of the system reaches 90% of the theoretical water output, and the system is vacuumed to carry out polycondensation dealcoholization reaction; after the reaction is completed, the temperature is lowered to 100°C and the material is discharged to obtain polyester polyol PE-1 for high-temperature resistant polyurethane adhesives.

Embodiment 2

[0035] The preparation method of described high temperature resistant polyurethane adhesive polyester polyol is as follows:

[0036] Put 1.1mol of 1,3-methylpropanediol, 0.08mol of trimethylolethane, 0.4mol of AA, 0.6mol of IPA, and 0.09mol of isophthalic acid-5-sodium sulfonate in a reactor, stirring Evenly, under a nitrogen atmosphere, program the temperature of the system to rise at a rate of 10°C / h; when it reaches 200°C, add 0.01wt.% tetraisopropyl titanate, continue to heat up, and carry out esterification and dehydration reaction; to 250°C ℃, the water output of the system reaches 95% of the theoretical water output, and the system is evacuated to carry out polycondensation dealcoholization reaction; after the reaction is completed, the temperature is lowered to 140 ℃ and the material is discharged to obtain polyester polyol PE-2 for high temperature resistant polyurethane adhesive. .

Embodiment 3

[0038] The preparation method of described high temperature resistant polyurethane adhesive polyester polyol is as follows:

[0039] Put 1.05mol of 1,3-methylpropanediol, 0.1mol of sodium dimethylol propionate, 0.03mol of trimethylolpropane, 0.3mol of AA, and 0.7mol of IPA in a reactor, stir evenly, and Under the atmosphere, the temperature of the system was programmed to rise at a rate of 10°C / h; when the temperature reached 190°C, 0.06 wt.% of diisopropyl bis(acetylacetonato)titanate was added, and the temperature was continued to rise to carry out the esterification and dehydration reaction; When the water output reaches 230°C, the water output of the system reaches 91% of the theoretical water output, and the system is vacuumed to carry out polycondensation dealcoholization reaction; after the reaction is completed, the temperature is lowered to 110°C and the material is discharged to obtain polyester polyol PE for high temperature resistant polyurethane adhesive. -3.

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PUM

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Abstract

The invention belongs to the technical field of polyurethane adhesive materials, and particularly relates to a preparation method of a polyester polyol for high-temperature resistant polyurethane adhesives, and an adhesive prepared by using the same. A small molecular polyol, a small molecular diacid, and a diacid containing an ionic group or a diol containing an ionic group are put into a reaction kettle, uniform stirring is performed, in a nitrogen atmosphere, when the temperature is raised to 180-200 DEG C, a catalyst is added, the temperature continues to be raised, and an esterification dehydration reaction is carried out; when the temperature is raised to 230-250 DEG C, the water output of the system reaches 90-95%, vacuum pumping is performed, and a polycondensation dealcoholizationreaction is carried out; and after the reaction is completed, the temperature is lowered to 100-140 DEG C, and a material is discharged to obtain the polyester polyol for high-temperature resistant polyurethane adhesives. An acid value of the polyester polyol for high-temperature resistant polyurethane adhesives is less than or equal to 1.0, and a number average molecular weight is 1000-5000. When the polyester polyol is used as a raw material for the polyurethane adhesive, heat-resistant stability and the bonding strength for materials of the polyurethane adhesive can be significantly improved.

Description

technical field [0001] The invention belongs to the technical field of polyurethane adhesive materials, and in particular relates to a preparation method of polyester polyol for high-temperature-resistant polyurethane adhesives and an adhesive prepared by using the polyester polyol. Background technique [0002] Polyurethane adhesives have high adhesion and bonding strength to various materials due to the structure containing more highly polar carbamate groups and more reactive isocyanate groups. At the same time, because its molecular structure is easy to be controlled through formula adjustment, the performance of the prepared polyurethane adhesive is adjustable, and has excellent properties such as wear resistance, oil resistance, solvent resistance, low temperature resistance, and ozone resistance. Polyurethane adhesives are widely used in the bonding of plastic, foam, wood, paper, leather, metal, glass and other materials. On the other hand, polyurethane adhesives are ...

Claims

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Application Information

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IPC IPC(8): C08G63/688C08G63/60C08G63/78C08G18/46C08G18/42C09J175/06
CPCC08G18/4286C08G18/4676C08G63/60C08G63/6886C08G63/78C09J175/06
Inventor 刘广臣张宾赵峰王刚
Owner SHANDONG INOV POLYURETHANE