A kind of two-component water-absorbing swelling cement and its application

A water-swelling, two-component technology, used in adhesives, polymer adhesive additives, non-polymer adhesive additives, etc., can solve the problems of long curing time, complicated steps, poor plasticity, etc.

Active Publication Date: 2021-03-19
中电保力(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In order to overcome the defects in the prior art that the waterproof material for the backwater surface of the basement cannot meet the requirements, has poor toughness, poor plasticity, poor bond strength, impermeability that cannot meet the waterproof and moisture-proof requirements, long curing time, and complicated steps in application, The invention provides a polymer cement based on epoxy resin modified polyurethane. For seams and repairs, the two-component product can be directly kneaded by hand according to a certain mass ratio

Method used

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  • A kind of two-component water-absorbing swelling cement and its application
  • A kind of two-component water-absorbing swelling cement and its application
  • A kind of two-component water-absorbing swelling cement and its application

Examples

Experimental program
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Effect test

preparation example 1

[0069] Take 20g of bentonite, soak it in 50mL of 65wt% HCl for 2 hours, take it out and wash it until neutral, dry it, add it to the ethanol solution of 5wt% KH-570, heat it to 80°C under stirring, react for 30 hours, and cool to room temperature. Suction filtration and drying to obtain bentonite modified by silane coupling agent.

preparation example 2

[0071]Take 20g of Kunlun 52# ​​paraffin and heat it above 60°C to liquefy the paraffin, put it into 50mL of 30wt% hydrogen peroxide, stir and react at 40°C for 15 minutes, then quickly transfer it to an ice-water bath to cool to room temperature, the paraffin is condensed into particles, filtered, and washed with water until medium Afterwards, put the surface hydroxyl-modified paraffin into a vacuum oven and dry at 25-30° C. to obtain modified paraffin 1. After testing, the number of hydroxyl groups on the surface of the obtained modified paraffin wax is 0.132 mmol / g.

preparation example 3

[0073] Other methods and conditions were the same as those in Preparation Example 2, except that the reaction time was 20 minutes to obtain modified paraffin wax 2, and the number of surface hydroxyl groups of the obtained modified stone 2 was 0.164 mmol / g.

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Abstract

The invention provides double-component water-swelling cement gum, which is composed of a component A and a component B. The component A comprises the following raw materials: polyether polyol, isocyanate, surface hydroxyl modified paraffin, epoxy resin, an epoxy diluent, a thickener and a solid filler. The component B is prepared from the following raw materials: polyether polyol, water-absorbentresin, a catalyst, a chain extender, surface hydroxyl modified paraffin, a thickener and a solid filler; wherein the solid filler comprises bentonite modified by a silane coupling agent. According tothe invention, paraffin with certain hydroxyl on the surface is introduced into the two components, so that certain surface lubricity is provided, and a product does not stick to hands of operators during kneading; good weather resistance is realized in various environments. The water-absorbent resin and the silane coupling agent modified bentonite synergistically play a role, so that the bondingstrength between the cement gum and a wall surface is enhanced, and a three-dimensional waterproof sealing effect is formed on a bonding interface, and waterproof and moistureproof effects are betterfacilitated.

Description

technical field [0001] The invention belongs to the field of polymer functional materials, and in particular relates to a two-component water-absorbing swelling cement and its application. Background technique [0002] In the field of construction, waterproof and leak-proof treatment is required for walls, especially in basements, or buildings with humid weather in the south. Since the concrete itself has interconnected capillary pores during construction, groundwater or moisture in the air will slowly penetrate into the interior of the building through these capillary pores, causing the surface of the wall to crack and fall off. In particular, the general power distribution room is generally located in the high-humidity and high-temperature environment of the basement, and water seepage and leakage often occur. For the protection of electrical components, higher requirements are put forward for waterproof materials. Moreover, the particularity of the waterproof material i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/08C09J11/04C09J11/08C10G73/38C08G18/64C08G18/48C08G18/58C08G18/24C08G18/18
CPCC08G18/10C08G18/18C08G18/242C08G18/48C09J11/04C09J11/08C09J175/08C10G73/38C08K13/06C08K9/06C08K9/02C08K3/346C08K7/26C08G18/58C08G18/64
Inventor 袁振王宏伟郭子慧王少华张海凤王宇川
Owner 中电保力(北京)科技有限公司
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