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Room-temperature rapid-curing polyurea adhesive and preparation method thereof

A technology of adhesive and polyurea, applied in the field of bonding solid buoyancy material modules

Inactive Publication Date: 2014-04-02
QINGDAO ADVANCED MARINE MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There is no report on the use of polyurea adhesives for the bonding of solid buoyancy material modules

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 100 grams of polytetrahydrofuran ether glycol PTMG-1000 and 30 grams of polyoxypropylene glycol voranol 2120 into a three-necked reaction flask equipped with a stirrer, a thermometer, and a vacuum straw, heat up to 110°C--120°C, and dehydrate , Degassing for 1 hour. Cool down to 60°C--70°C, add 60 grams of toluene diisocyanate TDI-80 / 20. Slowly raise the temperature to 80°C, react at 80°C±2°C for 2 hours, take a sample to measure the isocyanate content NCO%, when it is close to the theoretical value, discharge the material to obtain the semi-prepolymer component A. The isocyanate content NCO% is 10.5%.

Embodiment 2

[0024] Add 100 grams of polytetrahydrofuran ether glycol PTMG-2000 and 30 grams of polyoxypropylene glycol voranol 2120 into a three-necked reaction flask equipped with a stirrer, a thermometer, and a vacuum straw, heat up to 110°C--120°C, and dehydrate , Degassing for 1 hour. Cool down to 60°C--70°C, add 100 grams of diphenylmethane diisocyanate MDI-50. Slowly raise the temperature to 80°C, react at 80°C±2°C for 2 hours, take a sample to measure the isocyanate content NCO%, when it is close to the theoretical value, discharge the material to obtain the semi-prepolymer component A. The isocyanate content NCO% is 10.2%.

Embodiment 3

[0026] Add 100 grams of polytetrahydrofuran ether glycol PTMG-1000 and 30 grams of polyoxypropylene glycol voranol 2110 into a three-necked reaction flask equipped with a stirrer, a thermometer, and a vacuum straw, heat up to 110°C--120°C, and dehydrate , Degassing for 1 hour. Cool down to 60°C--70°C, add 70 grams of diphenylmethane diisocyanate MDI-100, and 25 grams of polyphenyl polymethyl polyisocyanate PAPI. Slowly raise the temperature to 80°C, react at 80°C±2°C for 2 hours, take a sample to measure the isocyanate content NCO%, when it is close to the theoretical value, discharge the material to obtain the semi-prepolymer component A. The isocyanate content NCO% is 11.5%.

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Abstract

The invention relates to a room-temperature rapid-curing polyurea adhesive and a preparation method thereof. The polyurea adhesive comprises A and R components, wherein the A component comprises polyether polyol and polyisocyanate; the R component comprises amino polyether and an amine chain extender. The polyurea adhesive is applied to the surface of bonded buoyancy material modules, has the effects of rapid curing and rapid tackifying, is higher in primary adhesive force and can reach the machining strength in the short time; the modules do not need to be clamped and fixed in splicing, bonding and curing processes and can be bonded on machining site, and the operation is convenient and reliable.

Description

technical field [0001] The invention relates to a bonding solid buoyancy material module, in particular to a room-temperature fast-curing polyurea adhesive and a manufacturing method thereof. Background technique [0002] The prefabricated solid buoyant material is prepared by molding process, and the rough blocks are spliced ​​with adhesives after mechanical roughing, bonded into a building block standard module, and then spliced ​​according to the design requirements of the drawing to form a solid buoyant material. The adhesives used are usually epoxy resins, acrylates, and polyurethanes. Although such adhesives can be cured at room temperature, it takes 24 hours or even more than a week to reach the maximum bond strength. [0003] Polyurea adhesives cure quickly at room temperature, can achieve high strength in a short time, and are widely used for their high adhesion, heavy-duty corrosion resistance, seawater corrosion resistance and good construction performance. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/02C08G18/66C08G18/50C08G18/48C08G18/32
Inventor 刘连河张树华郭威魏浩张茂伟王德威
Owner QINGDAO ADVANCED MARINE MATERIAL TECH
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