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Preparation method of single-component polyurethane corner adhesive

A technology of polyurethane and corner glue, which is applied in the direction of polyurea/polyurethane adhesives, adhesives, non-polymer adhesive additives, etc., and can solve the problems of unsatisfactory bond strength, cracking of doors, windows, furniture, and low temperature resistance Poor and other problems, to achieve the effect of adjustable curing speed, outstanding aging resistance, and improved bond strength

Inactive Publication Date: 2016-12-21
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although epoxy glue can meet the requirements of bonding strength, its low temperature resistance is poor, and doors, windows and furniture exposed to environments with large temperature differences for a long time are prone to cracking
Ordinary polyurethane adhesives either cannot meet the requirements of bonding strength, or have poor sealing performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) 32 mass parts polyoxypropylene-oxyethylene trihydric alcohol (molecular weight 4950, hydroxyl value 34mgKOH / g), 34 mass parts bisphenol A modified polyoxypropylene glycol (molecular weight 1557, hydroxyl value 72mgKOH / g ), 20 parts by mass of diphenylmethane diisocyanate, and 6.4 parts by mass of dioctyl phthalate are added to a reaction kettle equipped with a stirring device, a nitrogen inlet, and a thermometer, and the temperature is raised to 85° C., and reacted for a period of time to make the mass fraction of NCO Reduced to about 5.6%, to obtain product one.

[0023] (2) Add 7.2 parts by mass of white carbon black into the product 1 of step (1), and fully stir the mixed material evenly.

[0024] (3) Add 0.25 parts by mass of dibutyltin dilaurate and 0.15 parts by mass of bismorpholinyl diethyl ether to the mixed material in step (2), stir well, and vacuum defoam for half an hour to obtain a single-component polyurethane composition Corner glue.

[0025] Use: ...

Embodiment 2

[0027] (1) 29 mass parts of polyoxypropylene-oxyethylene trihydric alcohol (molecular weight 4950, hydroxyl value 34mgKOH / g), 29 mass parts of bisphenol A modified polyoxypropylene glycol (molecular weight 1997, hydroxyl value 56.18mgKOH / g) g), 26 parts by mass of diphenylmethane diisocyanate and 6 parts by mass of dioctyl phthalate are added to a reaction kettle equipped with a stirring device, a nitrogen inlet, and a thermometer, and the temperature is raised to 85° C., and reacted for a period of time to make the mass of NCO The fraction drops to around 7.5%, yielding product one.

[0028] (2) Add 9.4 parts by mass of white carbon black into the product 1 of step (1), and fully stir the mixed material evenly.

[0029] (3) Add 0.38 parts by mass of dibutyltin dilaurate and 0.22 parts by mass of bismorpholino diethyl ether to the mixed material in step (2), stir well, and vacuum defoam for half an hour to obtain a single-component polyurethane composition Corner glue.

[00...

Embodiment 3

[0032] (1) 57 parts by mass of bisphenol A modified polyoxypropylene diol (molecular weight 1557, hydroxyl value 56.18mgKOH / g), 26 parts by mass of diphenylmethane diisocyanate, and 5 parts by mass of dioctyl phthalate were added In a reaction kettle equipped with a stirring device, a nitrogen inlet, and a thermometer, the temperature was raised to 85° C., and the reaction was performed for a period of time, so that the mass fraction of NCO was reduced to about 6.43%, and the product 1 was obtained.

[0033] (2) Add 11.5 parts by mass of white carbon black into the product 1 of step (1), and fully stir the mixed material evenly.

[0034] (3) Add 0.34 parts by mass of dibutyltin dilaurate and 0.16 parts by mass of bismorpholinyl diethyl ether to the mixed material in step (2), stir well, and vacuum defoam for half an hour to obtain a single-component polyurethane composition Corner glue.

[0035] Use: The polyurethane corner glue prepared in this example is extruded through a ...

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Abstract

The invention belongs to the technical field of polyurethane sealant, and more specifically relates to a preparation method of a single-component polyurethane corner adhesive. The preparation method comprises following steps: tri-functionality and / or bi-functionality polyether polyols with different molecular weights, one or two ingredients selected from methylene diphenyl diisocyanate and polyaryl polymethylene isocyanate, and a plasticizer are reacted at a certain temperature; an obtained mixture is uniformly mixed with an inorganic filler and a catalyst; and an obtained mixed material is subjected to vacuum defoamation. The single-component polyurethane corner adhesive is capable of satisfying demands on both adhesive strength and sealing performance at the same time, increase the integral strength of doors and windows, and furniture effectively, realizing effective filling of gaps, and preventing leakage and corner cracking. The preparation method is simple; the single-component polyurethane corner adhesive is friendly to the environment, possesses no peculiar smell, and can be applied to assembling and bonding of door and window corner gaps and furniture; curing speed is adjustable; and aging resistance is excellent.

Description

technical field [0001] The invention relates to the technical field of polyurethane sealant, in particular to a method for preparing a single-component polyurethane corner sealant. Background technique [0002] With the continuous improvement of the economic level, the steady development of infrastructure, and the continuous improvement of project quality. In the construction industry, high-grade heat-insulating aluminum alloys, aluminum-wood doors and windows, and high-grade panel furniture are increasingly used. However, its quality problems are becoming more and more prominent. One of the manifestations is that the corner bonding strength is not enough, which cannot meet the requirements of building energy conservation. [0003] At present, there is a mixed bag of such adhesives on the market, such as epoxy glue and ordinary polyurethane glue, with varying quality. Although epoxy glue can meet the requirements of bonding strength, its low temperature resistance is poor,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J11/04C09J11/06C08G18/48C08G18/76C08K5/12C08K3/36
CPCC08G18/4812C08G18/4825C08G18/4833C08G18/485C08G18/7671C08K3/36C08K5/12C09J11/04C09J11/06C09J175/08Y02P20/141
Inventor 李剑锋孙兆任王玉杨凯周玉波
Owner SHANDONG INOV NEW MATERIALS CO LTD
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