High-elongation waterborne polyurethane waterproof coating and preparation method

A water-based polyurethane and waterproof coating technology, applied in the field of high-extension water-based polyurethane waterproof coating and preparation, high-stretch water-based polyurethane waterproof coating, can solve the problems of low elongation at break, high hard segment content, brittle polyurethane, etc., and achieve short production cycle. , improve the overall performance, the effect of improving production efficiency

Inactive Publication Date: 2018-03-30
山东鑫达鲁鑫防水材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved in the present invention is to provide a high-extensibility water-based polyurethane waterproof coating and a preparation method for the deficiencies in the prior art. , the polyurethane obtained is very brittle, has poor low-temperature bendability and low elongation at break, and provides a method for preparing a water-based polyurethane waterproof coating with high elongation at room temperature 15-35°C

Method used

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  • High-elongation waterborne polyurethane waterproof coating and preparation method
  • High-elongation waterborne polyurethane waterproof coating and preparation method
  • High-elongation waterborne polyurethane waterproof coating and preparation method

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Embodiment 1

[0046] The preparation of water-based polyurethane waterproof coating, the proportion is as follows:

[0047]

[0048] The preparation method of the waterborne polyurethane waterproof coating described in embodiment 1, comprises the following steps:

[0049] Step 1: Accurately weigh the resin and emulsion in the formula and add them to the three-necked bottle, start stirring at a speed of 800r / min, and stir and pre-mix for 1 hour to obtain the first intermediate;

[0050] Step 2: Add a thickener, defoamer, dispersant, and film-forming aid to the first intermediate obtained in step 1, at a speed of 800 r / min, and stir and pre-mix for 1 hour to obtain the second intermediate;

[0051] Step 3: Add filler to the second intermediate obtained in Step 2 and disperse with high-speed stirring at a speed of 2000r / min, and stir for 2 hours to obtain a water-based polyurethane waterproof coating.

Embodiment 2

[0053] The preparation of water-based polyurethane waterproof coating, the proportion is as follows:

[0054]

[0055] The preparation method of the waterborne polyurethane waterproof coating described in embodiment 2, comprises the following steps:

[0056]Step 1: Accurately weigh the resin and emulsion in the formula and add them to the three-necked bottle, start stirring at a speed of 800r / min, and stir and pre-mix for 0.5h to obtain the first intermediate;

[0057] Step 2: Add a thickener, defoamer, dispersant, and film-forming aid to the first intermediate obtained in Step 1, at a speed of 800 r / min, and stir and pre-mix for 0.5 h to obtain the second intermediate;

[0058] Step 3: Add filler to the second intermediate obtained in Step 2 and disperse with high-speed stirring at a speed of 2000 r / min, and stir for 2.5 hours to obtain a water-based polyurethane waterproof coating.

Embodiment 3

[0060] The 1000 order heavy calcium 55g in embodiment 1 is changed into 1000 order light calcium 40g and 1000 order talcum powder 25g, other conditions are unchanged.

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Abstract

The invention provides a high-elongation waterborne polyurethane waterproof coating which is prepared from the following components in percentage by mass: 15-60% of waterborne resin component, 10-55%of waterborne emulsion component, 0.5-4% of coalescing agent, 0.1-3% of antifoaming agent, 0.5-4% of thickening agent, 0.5-4% of dispersing agent and 10-40% of filler. The invention solves the problemof the prior art that a large amount of diisocyanate is applied and consequently the hard segment content is excessively high and the obtained polyurethane is very crisp and has poor low-temperaturebending property and low elongation at break, and provides a preparation method for preparing a high-elongation waterborne polyurethane waterproof coating at a room temperature of 15-35 DEG C.

Description

technical field [0001] The invention relates to the field of polyurethane waterproof coatings, in particular to a high-extension water-based polyurethane waterproof coating, in particular to a high-extension water-based polyurethane waterproof coating and a preparation method thereof. Background technique [0002] As an emerging polymer material, polyurethane is widely used in coatings, foaming and other fields due to its excellent performance, and is known as the "fifth largest plastic". [0003] Traditional polyurethanes contain a large amount of solvents, which seriously pollute the environment, especially the residual isocyanate monomers in solvent-based two-component polyurethanes, which are extremely toxic. With the increasing emphasis on the environment and the restrictions on the discharge of volatile organic solvents in various countries, water-based coatings represented by water-based coatings have developed rapidly, and water-based polyurethane coatings are one of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D125/14C09D131/04C09D133/04C09D7/61C09D7/65
CPCC09D175/04C08K2003/265C08K2201/014C08L2205/025C08L2205/035C08L25/14C08L83/04C08K3/26C08L71/02C08L1/286C08L33/04C08L31/04C08K3/34C08L75/04
Inventor 李军伟刘军光孙美峰季静静刘鹏张风莉
Owner 山东鑫达鲁鑫防水材料有限公司
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