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Polyurethane putty for concrete surface treatment

A technology of polyurethane putty and low surface tension, which can be used in filling slurry, covering/lining, construction, etc., and can solve the problems of construction efficiency limitation and unsuitability

Inactive Publication Date: 2012-03-28
JIANGSU STEADY NEW ENERGY TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in terms of technology, it is not suitable for the use of large areas of concrete surface (such as high-speed railway bridge deck repair), so the construction efficiency is greatly limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Take 44 parts of commercially available 600-mesh talcum powder, dry at 400°C for 5 hours, add 6 parts of polyamide wax (Bentone EW) after cooling down to room temperature, and then knead in a kneader together with the aforementioned dehydrated polyol mixture After 1 hour, ensure that the mixture is uniform, and then use a three-roller grinder to grind the material until it becomes a fine and uniform white paste, and then the B component is obtained.

[0062] Embodiment 2 B component preparation method

[0063] Take 40 parts of N220 polyether polyol, 10 parts of Stepanpol PD-200LV polyester polyol, 10 parts of 1,4-butanediol, mix the above-mentioned polyols in the reactor and raise the temperature to 110°C. Dehydration under mPa. vacuum condition for 2 hours, control the moisture content below 0.005%.

Embodiment 2

[0064] Take 30 parts of commercially available 700-mesh kaolin, dry at 400°C for 5 hours, then add 10 parts of polyamide wax (Disparlon 6900-20X) after cooling down to room temperature, and then add it to the kneader together with the aforementioned dehydrated polyol mixture Knead for 1 hour to ensure uniform mixing, and then use a three-roller grinder to grind until a fine and uniform white paste material is obtained, and then component B is obtained.

[0065] Embodiment 3 B component preparation method

[0066] Take 35 parts of PEBA-1500 polyester polyol, 10 parts of Stepanpol PD-200LV polyester polyol, and 5 parts of diethylene glycol, mix the above polyols in the reactor and heat up to 110°C, then lower the temperature to -0.02mPa. Dehydrate under vacuum conditions for 2 hours, and control the moisture content below 0.005%.

Embodiment 3

[0067] Take 15 parts of commercially available 700 mesh talcum powder and 21 parts of kaolin, dry at 400°C for 5 hours, then add 14 parts of polyamide wax (Bentone EW) after cooling down to room temperature, and then add it together with the aforementioned dehydrated polyol mixture Add to a kneader and knead for 1 hour to ensure uniform mixing, and then use a three-roll mill to grind until a fine and uniform white paste material is obtained, and then component B is obtained.

[0068] Embodiment 4 B component preparation method

[0069] Take 35 parts of PDA-2000 polyester polyol, 10 parts of Stepanpol PD-90LV polyester polyol, and 5 parts of dipropylene glycol, mix the above polyols in the reactor and heat up to 110°C, then lower the temperature to -0.02mPa. Dehydrate under vacuum for 2 hours, and control the moisture content below 0.005%.

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PUM

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Abstract

The invention provides bi-component polyurethane putty special for concrete surface treatment, and belongs to the field of chemical materials. A polyurethane primer special for the concrete surface treatment is characterized in that: a bi-component polyurethane system, namely an isocyanate component A and a resin component B, is used. The invention has the advantages that: the bi-component low surface tension polyurethane putty is suitable for filling and repairing planar defects (such as pin holes, air holes, pits and the like) of the concrete surface.

Description

technical field [0001] The product of the invention relates to a two-component polyurethane putty specially used for concrete surface treatment, and belongs to the field of chemical materials. Background technique [0002] The waterproof, anti-corrosion and thermal insulation construction of the concrete building surface has become more and more important and common means of building protection and energy saving, and the two-component (or one-component) polyurethane elastomer and sprayed polyurea elastomer have become the important construction concrete surface. One of the best waterproof and anti-corrosion materials. Generally, the surface of concrete buildings contains a large number of defects, such as pores, pinholes, and pits. In addition, for new concrete buildings, there will be a loose mortar floating layer due to the solidification of the concrete grout liquid surface. [0003] Due to the existence of these defects, polyurethane or polyurea waterproof and anticorro...

Claims

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Application Information

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IPC IPC(8): C09D5/34E04F13/02
Inventor 郁维铭史卫国任少华侯东海
Owner JIANGSU STEADY NEW ENERGY TECH DEV
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