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Preparation method of transparent one-component polyurethane corner-combining adhesive

A technology of polyurethane and corner glue, applied in polyurea/polyurethane adhesives, chemical instruments and methods, adhesives, etc., can solve problems such as deformation, leakage of doors and windows, and achieve good transparency, high bonding and sealing, and good Effects of Thixotropy and Handling Properties

Active Publication Date: 2013-10-30
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 transparent one-component polyurethane corner glue, which can improve product performance and stability; the product has strong adhesive force and improves the overall strength of doors and windows , there is proper foaming during the curing process, effectively filling the gaps, and solving the problems of leakage, deformation and corner cracking of doors and windows; at the same time, it has high transparency, good thixotropy, fast curing speed, good toughness, aging resistance and other performance characteristics

Method used

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  • Preparation method of transparent one-component polyurethane corner-combining adhesive
  • Preparation method of transparent one-component polyurethane corner-combining adhesive
  • Preparation method of transparent one-component polyurethane corner-combining adhesive

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preparation example Construction

[0017] The preparation method of the transparent one-component polyurethane corner glue of the present invention, its preferred embodiment comprises steps:

[0018] Preparation of polyurethane prepolymer:

[0019] Prepare each raw material of polyurethane prepolymer by mass parts, comprise:

[0020] 5-10 parts of small molecular weight trifunctional polyols, 10-15 parts of small molecular weight difunctional polyether polyols, 20-30 parts of medium molecular weight difunctional polyether polyols, 10-15 parts of trifunctional polyether polyols 40-50 parts of diphenylmethane diisocyanate;

[0021] Add the small molecular weight trifunctional polyol, small molecular weight difunctional polyether polyol, medium molecular weight difunctional polyether polyol and trifunctional polyether polyol into the synthesis reaction kettle, heat up to 50°C, Add diphenylmethane diisocyanate, heat up to 60-80°C, react for 3 hours, the synthesis reaction is completed, and a polyurethane prepolym...

Embodiment 1

[0040] This embodiment 1 provides a preparation method of a transparent one-component polyurethane corner glue. The prepared transparent corner glue has the characteristics of good transparency, excellent bonding performance, good sealing performance, and fast curing speed. It is used for heat insulation (broken bridge) corner joints and corner joints of aluminum alloy doors and windows. The preparation method specifically includes:

[0041] Preparation of polyurethane prepolymer:

[0042] Get raw materials according to the following ratio:

[0043]

[0044] 5 parts by mass of small molecule trihydric alcohol, 12 parts by mass of polyoxypropylene diol (molecular weight of 400), 25 parts by mass of polyoxypropylene diol (molecular weight of 2000), 10 parts by mass of polyoxypropylene triol (Molecular weight is 4800) into the synthesis reaction kettle, heated up to 50°C, added 48 parts by mass of diphenylmethane diisocyanate, heated up to 60-80°C, reacted for 3 hours, the m...

Embodiment 2

[0049]The third embodiment provides a method for preparing a transparent single-component polyurethane corner glue. The prepared transparent corner glue has the characteristics of good transparency, excellent bonding performance, good sealing performance, and fast curing speed. It is used for heat insulation (broken bridge) corner joints and corner joints of aluminum alloy doors and windows. The preparation method specifically includes:

[0050] Preparation of polyurethane prepolymer:

[0051] Get raw materials according to the following ratio:

[0052]

[0053] 6 parts by mass of small molecule triol, 12 parts by mass of polyoxypropylene diol (molecular weight 400), 22 parts by mass of polyoxypropylene diol (molecular weight 4000), 15 parts by mass of polyoxypropylene triol (Molecular weight is 4800) into the synthesis reaction kettle, heated up to 50°C, added 45 parts by mass of diphenylmethane diisocyanate, heated up to 60-80°C, reacted for 3 hours, the measured viscos...

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Abstract

The invention discloses a preparation method of a transparent one-component polyurethane corner-combining adhesive. The preparation method comprises the following steps: firstly utilizing bifunctional and tri-functional polyether glycols and diphenyl-methane-diisocyanate which have different molecular weights to carry out synthetic reaction under certain conditions to obtain a polyurethane prepolymer; and then kneading the prepared prepolymer with a plasticizer, transparent fillers, an organosilicon adhesion promoter and catalysts to obtain the polyurethane corner-combining adhesive. The preparation method has the following beneficial effects: through structural design of the polyurethane prepolymer chain segment and reasonable regulation of the types and dosages of the transparent fillers, the prepared polyurethane corner-combining adhesive has the characteristics of high transparency, high bonding strength, high curing speed, good flexibility, appropriate foaming percentage and strong sealing function; the polyurethane corner-combining adhesive is used for bonding and sealing at the fillet positions and corners of the aluminium alloy doors and windows; and the corner-combining adhesive is completely environment-friendly and nontoxic and has excellent weather resistance.

Description

technical field [0001] The invention relates to the preparation technology of structural sealant, in particular to a preparation method of transparent one-component polyurethane corner glue. Background technique [0002] As the pace of infrastructure construction continues to accelerate, 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. 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 pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/08C09J11/04C09J11/06C08G18/76C08G18/66C08G18/48C09K3/10
Inventor 刘滨罗善国
Owner BEIJING COMENS NEW MATERIALS