Monocomponent high elastic aqueous polyurethane/acrylate waterproof paint and process for preparing same

A water-based polyurethane and acrylate technology, applied in polyurea/polyurethane coatings, coatings, latex paints, etc., can solve the problems of low performance of waterproof coatings and non-compliance with environmental protection requirements, and achieve excellent performance effects

Inactive Publication Date: 2005-09-21
SHANGHAI RES INST OF BUILDING SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] 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. The polymer emulsion waterproof coatings prepared from the above emulsions have low performance, such as their main properties It only basically complies with the standard of polymer emulsion waterproof coating (JC / T864-2000), the tensile strength is ≥1.5MPa, the elongation at break is ≥300%, and the low temperature flexibility is -10°C--20°C
Polyurethane architectural waterproof coatings contain toxic and harmful solvents and free isocyanate components, which do not meet environmental protection requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In 8 parts of water, add 0.8 parts of dispersant 5060, 0.8 parts of coalescent benzyl alcohol, 0.15 parts of defoamer NXZ, 3.5 parts of plasticizer dioctyl phthalate, 2.2 parts of pH stabilizer, 1.5 parts of ultraviolet light Absorbent, stir for 20 minutes, then add 21 parts of pigmented titanium dioxide, talcum powder, kaolin, disperse the color paste for 30 minutes at high speed, then add 55 parts of polyurethane / acrylate emulsion under low speed stirring, mix for 20 minutes, add 0.3 parts of fluid Leveling agent RM-2020, 0.15 parts of defoamer NXZ, 0.8 parts of thickener TH-80, mixed for 20 minutes to obtain a one-component high-elasticity waterborne polyurethane / acrylate waterproof coating for buildings.

Embodiment 2

[0035] In 14 parts of water, add 1.0 parts of dispersant 1124, 1.2 parts of coalescent TEXANOL, 0.28 parts of defoamer Nopco 8034, 7.8 parts of plasticizer dibutyl phthalate, 2 parts of PH stabilizer, 1 part of UV Absorbent, stir for 20 minutes, then add 25 parts of filler titanium dioxide, mica powder, heavy calcium carbonate and disperse at high speed for 40 minutes, then add 53 parts of polyurethane / acrylate emulsion under low speed stirring, mix for 20 minutes, add 0.2 parts of leveling Agent RM-2020, 0.75 parts of thickener 481HEC, mixed for 20 minutes to obtain a one-component high-elastic waterborne polyurethane / acrylate waterproof coating for buildings.

Embodiment 3

[0037] In 9 parts of water add 1 part of dispersant 5040, 1 part of coalescent TEXANOL, 0.23 parts of defoamer Nopco 8034, 3.6 parts of plasticizer dibutyl phthalate, 1.8 parts of PH stabilizer, 1 part of UV Absorbent, stir for 30 minutes, then add 16 parts of filler titanium dioxide, mica powder, heavy calcium carbonate and disperse at high speed for 30 minutes, then add 50 parts of polyurethane / acrylate emulsion under low speed stirring, mix for 20 minutes, add 0.2 parts of leveling Agent RM-2020, 0.70 parts of thickener 481HEC, mixed for 20 minutes to obtain a one-component highly elastic waterborne polyurethane / acrylate waterproof coating for buildings.

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Abstract

The invention discloses a monocomponent high elastic aqueous polyurethane/acrylate waterproof paint which comprises (by weight ratio) polyurethane / acrylic ester composite emulsion 30-90 parts, filling pigment 5-45 parts, dispersing agent 0.2-1.1 parts, film forming adjuvant 0.6-1.5 parts, levelling agent 0.05-0.35 part, defoaming agent 0.08-0.32 part, plasticizer 0.6-12 parts, thickening agent 0.01-1.0 part, pH stabilizing agent 0.01-5.0 parts, ultraviolet absorbent 0.5-1.0 part, water 1-15 parts. The preparation process is also disclosed.

Description

technical field [0001] The invention relates to a coating for building and a preparation method thereof, in particular to a highly elastic polyurethane / acrylate waterproof coating and a preparation method thereof. Background technique [0002] 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. The polymer emulsion waterproof coatings prepared from the above emulsions have low performance, such as their main properties It only basically meets the tensile strength ≥ 1.5MPa, elongation at break ≥ 300% specified in the polymer emulsion waterproof coating standard (JC / T864-2000), and the low temperature flexibility is -10°C-20°C. The polyurethane architectural waterproof coating contains toxic and harmful solvents and free isocyanate components, which do not meet environmental protection requirements. Contents of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/02C09D133/04C09D175/04
Inventor 郭青吴蓁
Owner SHANGHAI RES INST OF BUILDING SCI CO LTD
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