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Micro-expansion hydrophobic polyurethane cement mortar composition and preparation method thereof

A cement mortar and hydrophobic technology, which is applied in the field of building materials, can solve problems such as poor compatibility, and achieve the effects of good hydrophobic performance, convenient construction, and strong environmental protection

Active Publication Date: 2015-04-29
JIANGSU SOBUTE NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oily castor oil used in this water-based polyurethane mortar composition still has disadvantages such as poor compatibility with aggregate materials.

Method used

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  • Micro-expansion hydrophobic polyurethane cement mortar composition and preparation method thereof
  • Micro-expansion hydrophobic polyurethane cement mortar composition and preparation method thereof
  • Micro-expansion hydrophobic polyurethane cement mortar composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 2 parts of water-dispersible polyol resin (PEG200, commercially available) to 10 parts of water in a high-speed dispersion environment of 1000r / min, and heat up to 35°C for dissolution; water-emulsifiable castor oil polyol resin heated to 35°C (Ito Oil Co., Ltd., H-306) 18 parts were successively added to the dispersion system, and continued to emulsify and disperse at a high speed of 1000r / min for 20 minutes to obtain a composite polyol emulsion system; add 20 parts of isocyanate curing agent (PAPI, Bayer 44V20), Stir for 2 minutes, add 62 parts of water-hardening mortar aggregate system (32.5 white Portland cement: 0.35-0.5mm sand: 0.25-0.5mm sand: 0.1-0.25mm sand = 25:10:50:15) successively, Stir for 5 minutes to obtain polyurethane cement mortar.

Embodiment 2

[0035] Add 3 parts of water-dispersed bifunctional polyol resin (PEG2000, commercially available), 2 parts of tetrafunctional polyol resin (N403, Jiangsu Zhongshan Chemical Industry) into 13 parts of water in a high-speed dispersion environment of 3000r / min, and heat up to 55 ℃; add 8 parts of water-emulsifiable castor oil polyol resin heated to 55℃ (Ito Oil Co., Ltd., HF-1300) into the dispersion system successively, and continue emulsifying and dispersing at 2000r / min for 40min at a high speed to obtain a composite Polyol emulsion system; add 15 parts of isocyanate curing agent (PAPI, Bayer 44V20), stir for 3 minutes, mix 70 parts of water-hardening mortar aggregate system (32.5 white Portland cement: 0.35~0.5mm sand: 0.25~~0.5mm sand : 0.1 ~ 0.25mm sand = 35:5:55:5) added successively, stirred for 10 minutes, and the obtained polyurethane cement mortar.

Embodiment 3

[0037]Add 4 parts of water-dispersed polyol resin (EO / PO=4:6, bifunctionality, molecular weight 2000, Nanjing Bote New Material Co., Ltd.) to 7 parts of water in a high-speed dispersion environment of 5000r / min, and heat up to 70 ℃; add 12 parts of water-emulsifiable castor oil polyol resin heated to 70℃ (Ito Oil Co., Ltd., HM-306) into the dispersion system successively, and continue to emulsify and disperse at 5000r / min for 50min at a high speed to obtain a composite Polyol emulsion system; add 13 parts of isocyanate curing agent (PAPI, Wanhua PM200), stir for 5 minutes, mix 78 parts of water-hardening mortar aggregate system (32.5 white Portland cement: 0.35~0.5mm sand: 0.25~~0.5mm Sand: 0.1 ~ 0.25mm sand = 35:5:55:5) add in succession, stir for 8 minutes, and obtain polyurethane cement mortar.

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Abstract

The invention provides a micro-expansion hydrophobic polyurethane cement mortar composition which comprises the following components in parts by weight: 50-90 parts of a water hardened mortar aggregate system, 1-5 parts of water-dispersed polyol resin, 5-20 parts of water emulsified castor oil polyol resin, 5-25 parts of an isocyanate curing agent, and 5-15 parts of water. The invention further provides a preparation method of the micro-expansive hydrophobic polyurethane cement mortar composition. The micro-expansion hydrophobic polyurethane cement mortar composition is simple in preparation process, and is convenient to construct, and after curing molding, the micro-expansion hydrophobic polyurethane cement mortar composition has high micro-expansion performance and favorable hydrophobicity, and has a self compacting ability, shock resistance, wear resistance and hydrophobic and waterproof properties at the same time.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a micro-expansion hydrophobic polyurethane cement mortar composition and a preparation method thereof. Background technique [0002] Ordinary mortar composed of cement, sand, mineral powder and other materials has large drying shrinkage and deformation, poor impermeability, crack resistance, and corrosion resistance, which are greatly restricted in practical applications; and acrylic series emulsion, epoxy resin, Polymer mortars modified by materials such as polyurethane have emerged as the times require, and have also shown excellent performance in practical engineering applications. Polymer mortar modified by acrylic series emulsion has excellent waterproof performance. However, due to the low strength of acrylic emulsion itself, the strength of the obtained specimen is low; polymer mortar prepared with epoxy resin or water-based epoxy can meet the requirements of reinforced m...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B24/28C08G18/67C08G18/48C08G18/42
Inventor 冉千平孙德文万赟杨冲尹浩刘玉亭李波
Owner JIANGSU SOBUTE NEW MATERIALS
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