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Water-proof coating with mono component high elasticity water polyurethane for construction and preparation process thereof

A building waterproof and water-based polyurethane technology, applied in polyurea/polyurethane coatings, anti-fouling/underwater coatings, coatings, etc., can solve the problems of high tensile strength, elongation at break, low performance of waterproof coatings, etc., and achieve excellent performance Effect

Inactive Publication Date: 2005-03-23
SHANGHAI COLLODIN MATERIAL TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The purpose of the present invention is to overcome the shortcomings of the low performance of the current preparation of polymer emulsion waterproof coatings, to provide a high tensile strength, high elongation at break, ultra-low temperature flexible single-component high-elasticity water-based polyurethane architectural waterproof coating and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 0.7 parts of dispersant 5060, 0.9 parts of benzyl alcohol, 0.1 part of defoamer NXZ, 3 parts of dioctyl phthalate, 2 parts of pH stabilizer, and one part of UV absorber into 10 parts of water and stir for 20 minutes, then Add 20 parts of titanium dioxide, talcum powder, kaolin, and disperse the color paste for 30 minutes at high speed, then add 60 parts of polyurethane emulsion under low speed stirring, mix for 20 minutes, add 0.2 parts of leveling agent RM-2020, 0.1 part of defoamer NXZ, 0.75 parts of thickener TH-80, mixed for 20 minutes to obtain a one-component high-elastic water-based polyurethane waterproof coating for buildings.

Embodiment 2

[0024] Add 0.8 parts of dispersant 1124, 0.8 parts of coalescent Texanol, 0.15 parts of antifoaming agent Nopco, 4 parts of dibutyl phthalate, 1.5 parts of PH stabilizer, 0.5 parts of UV absorber in 11 parts of water and stir for 20 Minutes, then add 18 parts of titanium dioxide, mica powder, heavy calcium carbonate and disperse at high speed for 30 minutes, then add 50 parts of polyurethane emulsion under low speed stirring, mix for 20 minutes, add 0.18 parts of leveling agent RM-2020, 0.7 parts of thickening Agent 481HEC, mixed for 20 minutes to obtain a one-component high-elasticity waterborne polyurethane architectural waterproof coating.

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PUM

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Abstract

The invention discloses a single-component highly-elastic water-borne polyurethane building water proof coating, and its formula in weight percent: polyurethane emulsion 40-80, color filler 10-40, dispersant 0.3-1.0, film forming auxiliary 0.8-1.2, flow agent 0.1-0.4, defoaming agent 0.1-0.3, plasticizer 0.1-10, thickening agent 0.1-1.0, pH stabilizer 0.1-7.0, UV light absorbent 0.5-1.0 and water 1-15. Its preparing steps: blending dispersant, film forming auxiliary, defoaming agent, plasticizer and pH stabilizer according to the above formula in the water for 20 minutes, adding in color filler to make high-speed dispersion for 30 minutes, then pouring slowly polyurethane emulsion in to blending at low speed for 20 minutes, then adding in flow agent, defoaming agent, and thickening agent to continue low-speed blending for 20 minutes, and obtaining it. By detected, its tensile strength is 3.4 MPa, its rupture elongation is 580%, its low-temperature flexibility is -30 deg.C.

Description

Background technique [0001] At present, the polymer emulsions for preparing polymer emulsion waterproof coatings are limited to polyacrylate (pure acrylic) emulsions, EVA emulsions, styrene-acrylic emulsions, and styrene-butadiene emulsions. It only basically complies with the standard of polymer emulsion waterproof coating (JC / T864-2000) that the tensile strength is ≥1.5MPa, the elongation at break is ≥300%, and the low temperature flexibility is about -20°C. Contents of the invention [0002] The purpose of the present invention is to overcome the shortcomings of the low performance of the current preparation of polymer emulsion waterproof coatings, to provide a high tensile strength, high elongation at break, ultra-low temperature flexible single-component high-elasticity water-based polyurethane architectural waterproof coating and its preparation method . [0003] The technical scheme of the present invention is: a kind of one-component highly elastic waterborne polyur...

Claims

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Application Information

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IPC IPC(8): C09D5/16C09D175/04
Inventor 吴蓁郭青
Owner SHANGHAI COLLODIN MATERIAL TECH DEV CO LTD
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