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Method for preparing two-component polyurethane corner sealant

A two-component polyurethane and corner glue technology, applied in polyurea/polyurethane adhesives, chemical instruments and methods, adhesives, etc., can solve problems such as slow curing of corner glue, leakage of doors and windows, and proper foaming , to achieve good thixotropy and operability, high bonding and sealing effect, and excellent weather resistance

Active Publication Date: 2012-11-21
BEIJING COMENS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on the problems existing in the above-mentioned prior art, the embodiment of the present invention provides a method for preparing a two-component polyurethane corner glue. The two-component polyurethane corner glue prepared by this method has an extremely fast curing speed. The bonding effect can be achieved within tens of minutes, which can solve the shortcoming of slow curing of ordinary corner glue; at the same time, the two-component product has stronger bonding force, which can improve the overall strength of doors and windows; proper foaming during the curing process, effective filling gaps, to solve the problems of leakage, deformation and corner cracking of doors and windows

Method used

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  • Method for preparing two-component polyurethane corner sealant
  • Method for preparing two-component polyurethane corner sealant
  • Method for preparing two-component polyurethane corner sealant

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Experimental program
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preparation example Construction

[0018] The preparation method of two-component polyurethane corner glue, its preferred embodiment comprises steps:

[0019] Prepare the first component:

[0020] Each raw material for preparing the first component is calculated in parts by mass, including:

[0021] Medium molecular weight trifunctional polyether polyol 25~35 parts, small molecular weight trifunctional polyether polyol 3~8 parts, medium molecular weight difunctional polyether polyol 5~10 parts, small molecular weight diol 1~ 3 parts, 50-65 parts of inorganic filler, 2-5 parts of thixotropic agent, 1-3 parts of dehumidifier, 2-5 parts of whitening agent, 1-3 parts of silicone adhesion promoter, 0.01-0.03 parts of catalyst ;

[0022] The above medium molecular weight trifunctional polyether polyol, small molecular weight trifunctional polyether polyol, small molecular weight diol, medium molecular weight difunctional polyether polyol, inorganic filler, thixotropic agent, dehumidifier, whitening After the agent...

Embodiment 1

[0047] The first embodiment provides a method for preparing a two-component polyurethane corner glue. The prepared two-component polyurethane corner glue has the characteristics of fast curing speed, excellent bonding performance, and good sealing performance. It is used for heat insulation (broken bridge) corner joints and corner joints of aluminum alloy doors and windows. The preparation method specifically includes:

[0048] Prepare the first component:

[0049] Get raw materials according to the following ratio:

[0050]

[0051] The molecular weight of 30 mass parts is the polyoxypropylene trihydric alcohol of 800, the molecular weight of 3 mass parts is the polyoxypropylene trihydric alcohol of 450, the molecular weight of 5 mass parts is the polyoxypropylene glycol of 2000, 2 mass parts of Molecular weight is the polyoxypropylene glycol of 400, the nanometer calcium carbonate of 20 mass parts, the 400 order ground calcium carbonate of 33 mass parts, the fumed silic...

Embodiment 2

[0058] The second embodiment provides a method for preparing a two-component polyurethane corner glue. The prepared two-component polyurethane corner glue has the characteristics of fast curing speed, excellent bonding performance, and good sealing performance. It is used for heat insulation (broken bridge) corner joints and corner joints of aluminum alloy doors and windows. The preparation method specifically includes:

[0059] Prepare the first component:

[0060] Get raw materials according to the following ratio:

[0061]

[0062] The molecular weight of 25 mass parts is the polyoxypropylene trihydric alcohol of 1500, the molecular weight of 6 mass parts is the polyoxypropylene trihydric alcohol of 450, the molecular weight of 5 mass parts is the polyoxypropylene glycol of 2000, 3 mass parts of Molecular weight is 90 small molecular glycols, 10 mass parts of nano calcium carbonate, 44 mass parts of 800 mesh heavy calcium carbonate, 2 mass parts of fumed silica, 2 mass...

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Abstract

The invention discloses a method for preparing a two-component polyurethane corner sealant. Polyether polyol of two functionality of various molecular weights, polyether polyol of three functionality of various molecular weights, polyether polyol of multi-functionality of various molecular weights, an inorganic filler, a dehumidizer, a thixotropic agent, a whitening agent, an organic silicon adhesion promoter and a catalyst are kneaded, a first component of the two-component polyurethane corner sealant is obtained, polyisocyanates, the inorganic filler and the thixotropic agent serve as a second component of the two-component polyurethane corner sealant, the two components are compounded in accordance with the ratio, and the two-component polyurethane corner sealant is obtained. Through the selection of the polyether polyol and the matching of the inorganic filler, the thixotropic agent and the catalyst are added, so that the prepared two-component polyurethane corner sealant has the advantages of being high in curing speed, good in bonding strength and flexility, proper in foaming ratio, good in sealing function and the like. The two-component polyurethane corner sealant can be used for sealing and bonding corner seam portions and corners of aluminum alloy doors and windows, is environment-friendly, is free from toxin and has a good weather resisting property.

Description

technical field [0001] The invention relates to the preparation technology of structural sealant, in particular to a preparation method of two-component polyurethane corner glue. Background technique [0002] The pace of domestic infrastructure construction is accelerating, and the quality of projects is also improving. Heat insulation (broken bridge) aluminum alloy doors and windows are used more and more widely in construction as a high-end door and window design. As a rigid structure, aluminum alloy doors and windows need to be bonded and sealed at the corner joints and corners to improve the overall strength and air tightness. [0003] The sealants currently on the market for this purpose are relatively complicated. There are epoxy adhesives. Although epoxy adhesives have high strength, epoxy has poor low-temperature toughness. For doors and windows exposed to the outside for a long time, the cold and heat shrinkage is relatively large, and epoxy adhesives are very pro...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J11/04C09K3/10
Inventor 刘滨罗善国
Owner BEIJING COMENS NEW MATERIALS
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