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Double-component polyurethane adhesive used in construction, and preparation method thereof

A two-component polyurethane technology for construction, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive additives, etc., can solve the problem of low bond strength and low shear strength between rock wool and fiber cement boards. Low bond strength and other problems, to achieve the effect of increasing strength, improving bond strength, and high bond strength

Active Publication Date: 2018-01-09
保光(天津)汽车零部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are generally two shortcomings in existing polyurethane adhesives: one is that the bond strength of existing polyurethane adhesives is generally low, and most of the shear strength is not high; When bonding rock wool, the adhesive cannot penetrate into the rock wool with low body strength, which eventually leads to low bond strength between rock wool and fiber cement board

Method used

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  • Double-component polyurethane adhesive used in construction, and preparation method thereof
  • Double-component polyurethane adhesive used in construction, and preparation method thereof
  • Double-component polyurethane adhesive used in construction, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] This embodiment provides a two-component polyurethane adhesive for construction, which is composed of component A and component B in a mass ratio of 5:1; component B is polymerized MDI, and component A includes the following components in mass percentage:

[0027]

[0028] Preparation:

[0029] (1) Add trifunctional polyether polyol, difunctional diethylene glycol, polyacid dispersant, dibutyltin dilaurate catalyst, modified urea solution and water into the reaction kettle in proportion, and stir for 5-10min to a uniform slurry to obtain a slurry;

[0030] (2) Add heavy calcium carbonate, talcum powder and nano-calcium carbonate to the slurry obtained in step (1), stir for 40-60min to a uniform paste, and obtain the A component;

[0031] (3) The components A and B are uniformly mixed in proportion to obtain the finished two-component polyurethane adhesive for construction.

Embodiment 2

[0033] This embodiment provides a two-component polyurethane adhesive for construction, which is composed of component A and component B in a mass ratio of 5:1; component B is polymerized MDI, and component A includes the following components in mass percentage:

[0034]

[0035]

[0036] Preparation:

[0037] (1) Add trifunctional polyether polyol, difunctional diethylene glycol, polyacid dispersant, dibutyltin dilaurate catalyst, modified urea solution and water into the reaction kettle in proportion, and stir for 5-10min to a uniform slurry to obtain a slurry;

[0038] (2) Add heavy calcium carbonate and nano-calcium carbonate to the slurry obtained in step (1), stir for 40-60min to a uniform paste, and obtain the A component;

[0039] (3) The components A and B are uniformly mixed in proportion to obtain the finished two-component polyurethane adhesive for construction.

Embodiment 3

[0041] This embodiment provides a two-component polyurethane adhesive for construction, which is composed of component A and component B in a mass ratio of 5:1; component B is polymerized MDI, and component A includes the following components in mass percentage:

[0042]

[0043] Preparation:

[0044] (1) Add liquid components (difunctional polyether polyol, multifunctional small molecule alcohol chain extender, polyacid dispersant, catalyst, anti-settling agent, water) into the reaction kettle, and stir for 5-10min to a uniform slurry to obtain a slurry;

[0045] (2) Add mica powder and heavy calcium carbonate to the slurry obtained in step (1), and stir for 40-60min to a uniform paste;

[0046] (3) Mix the A component and the B component obtained above according to the mass ratio of 5:1 to obtain the finished two-component polyurethane adhesive for construction.

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Abstract

The invention discloses a double-component polyurethane adhesive used in construction, and a preparation method thereof. The double-component polyurethane adhesive used in construction is composed ofa component A and a component B at a weight ratio of 5:1; the component B is polymeric MDI; the component A comprises, by mass, 30 to 45% of a polyether polyol, 2 to 5% of a chain extender, 0.6 to 1.2% of a dispersant, 0.05 to 0.1% of a catalyst, 0.5 to 1.5% of an anti-sedimentation agent, 0.05 to 0.1% of water, and 50 to 65% of water. According to the preparation method, the polyether polyol andthe chain extender of the component A are combined, so that a three-dimensional net structure with higher crosslinking degree is formed in solidification, the content of hard segments in the three-dimensional net structure is increased, and the bonding strength of the double-component polyurethane adhesive is increased; a foaming structure is formed via reaction of water with isocyanate, so that apart of the double-component polyurethane adhesive penetrates into rock wool for solidification reaction, the strength of rock wool main body is increased, and the bonding strength of cement boards with rock wool is increased.

Description

technical field [0001] The application relates to an adhesive, in particular to a two-component polyurethane adhesive for construction and a preparation method thereof. Background technique [0002] The two-component polyurethane adhesive is composed of two components, A and B. The component A (main agent) contains a hydroxyl component, and the component B (curing agent) contains an isocyanate component. After mixing components A and B in an appropriate proportion, polyurethane with a cross-linked structure can be obtained after curing at room temperature or by heating. There are generally two shortcomings in existing polyurethane adhesives: one is that the bond strength of existing polyurethane adhesives is generally low, and most of the shear strength is not high; When bonding rock wool, the adhesive cannot penetrate into the rock wool with low body strength, which eventually leads to low bond strength between rock wool and fiber cement board. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J11/04C08G18/66C08G18/48C08G18/32
Inventor 樊国强孙凤海
Owner 保光(天津)汽车零部件有限公司
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