Odorless polyurethane waterproof coating and preparation method thereof

A polyurethane waterproofing and coating technology, used in polyurea/polyurethane coatings, coatings, devices for coating liquids on surfaces, etc. Effects of adsorption, excellent mechanical properties and chemical resistance

Inactive Publication Date: 2020-08-28
ANHUI SKSHU PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The air at the construction site contains a large amount of toluene, xylene, gasoline or ketone solvents, resulting in a serious excess of toxic and harmful gases in the construction environment, resulting in the death or injury of construction workers. Such incidents are not uncommon.
[0004] In particular, harmful substances such as free TDI and solvents and their irritating odors in the confined semi-airtight space have seriously damaged the health of construction workers. If they stay in such an environment for a long time, they will damage the liver, kidneys, brain and nervous system. , and may even cause convulsions, coma, memory loss, and serious consequences
It also adversely affects and damages the supervision of the later owner or unit and the health of the personnel using the unit
At present, there are no products on the market that are suitable for use in confined semi-airtight spaces

Method used

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  • Odorless polyurethane waterproof coating and preparation method thereof
  • Odorless polyurethane waterproof coating and preparation method thereof
  • Odorless polyurethane waterproof coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Odor-free polyurethane waterproof coating is a constant temperature one-component polyurethane product.

[0045]

[0046] The preparation method is as follows:

[0047] Add polyether polyols, plasticizers, and antioxidants into the reactor, set the stirring speed to 200 rpm, and heat the reactor. When the temperature of the reactor rises to 70°C, add titanium dioxide and talcum powder in sequence , heavy calcium, calcined kaolin, diatomaceous earth and photocatalyst, when the temperature of the reactor rises to between 115°C, turn on the vacuum pump connected to the reactor to evacuate the reactor, and make the reactor at a vacuum degree of -0.095 Continue vacuuming between Mpa for 5 hours, then turn off the vacuum pump;

[0048] After the dehydration is completed, close the vacuum valve and set the temperature to 50°C. After the temperature is cooled to 50°C, add TDI to keep the temperature for 1 hour;

[0049] Then the temperature was raised to 60°C for 1 hour at...

Embodiment 2

[0058] Odor-free polyurethane waterproof coating is a constant temperature one-component polyurethane product

[0059] The prescription components are:

[0060]

[0061] Preparation:

[0062] Add polyether polyols and plasticizers into the reactor, set the stirring speed to 600 rpm, and heat the reactor. When the temperature of the reactor rises to 80°C, add titanium dioxide, talcum powder, heavy calcium, Calcined kaolin, diatomaceous earth and photocatalyst, when the temperature of the reactor rose to 125°C, turn on the vacuum pump connected to the reactor to evacuate the reactor, and keep the reactor vacuum at -0.1Mpa for 2 hours , then turn off the vacuum pump;

[0063] After the dehydration is completed, close the vacuum valve and set the temperature to 45°C. After the temperature cools down to 45°C, add TDI to keep the temperature for 1-2 hours;

[0064] Then the temperature was raised to 55° C. for 2 hours at a constant temperature;

[0065] Heat up to 65°C for 2 ...

Embodiment 3

[0073] Odor-free polyurethane waterproof coating is a constant temperature one-component polyurethane product

[0074] The prescription components are:

[0075]

[0076] Production Process:

[0077] Add polyether polyols and plasticizers into the reactor, set the stirring speed to 300 rpm, and heat the reactor. When the temperature of the reactor rises to 72°C, add titanium dioxide, talcum powder, heavy calcium, Calcining kaolin, diatomaceous earth and photocatalyst, when the temperature of the reactor rises to 118°C, turn on the vacuum pump connected to the reactor to evacuate the reactor, and keep the reactor at a vacuum degree of -0.096Mpa Vacuumize for 2.5 hours, then turn off the vacuum pump;

[0078] After the dehydration is completed, close the vacuum valve and set the temperature to 55°C, and add TDI to keep the temperature for 1 hour after the temperature is cooled to 55°C;

[0079] Then the temperature was raised to 55° C. for 1 hour at a constant temperature; ...

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Abstract

The invention relates to an odorless polyurethane waterproof coating. The composition is prepared from the following components in parts by weight: 5.7 to 10.6 parts of isocyanate, 35.0 to 50.0 partsof polyether polyol, 8.0 to 12.0 parts of a plasticizer, 3.0 to 5.0 parts of titanium dioxide, 16.0 to 25.0 parts of talcum powder, 3.0 to 10.0 parts of heavy calcium carbonate, 2.0 to 7.0 parts of calcined kaolin, 1.0 to 3.0 parts of diatomite, 0.1 to 0.5 part of photocatalyst powder, 0.05 to 0.3 part of catalyst, 0.8 to 1.5 parts of latent curing agent, and 0.05 to 0.15 part of stabilizer. The coating disclosed by the invention has the advantages of proper viscosity, high solid content, low viscosity, no diluent, no free TDI detection, no volatile organic compound (VOC) of less than or equalto 10 g/L, no benzene and benzene series, no soluble heavy metal detection, excellent mechanical property and chemical resistance.

Description

technical field [0001] The invention relates to a one-component polyurethane waterproof coating, in particular to an odor-cleaning one-component polyurethane waterproof coating and a preparation method thereof. Background technique [0002] It has been more than 50 years since the successful research and development of polyurethane waterproof coatings in my country in the 1970s. The market share and consumption of polyurethane waterproof coatings have also increased year by year. According to statistics in 2018, the total output of building waterproof materials is expected to reach 2.212 billion square meters. Coatings accounted for 27.78%, 614.5 million square meters. Polyurethane waterproof coatings accounted for 30.76% of the total waterproof coatings, about 189 million square meters. The growth rate of waterproof coatings in 2019 is expected to increase by 9.4% year-on-year. Polyurethane is expected to reach 205.7 million square meters. [0003] Polyurethane waterproof...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D7/61C09D7/63B05D3/00B05D5/00B05D7/24
CPCB05D3/002B05D3/007B05D5/00B05D7/24C08K2003/2241C08K2003/265C09D175/08C09D7/61C09D7/63C09D7/70C08K13/04C08K5/12C08K3/22C08K3/34C08K3/26C08K3/346C08K7/26
Inventor 张志功周章华徐江山
Owner ANHUI SKSHU PAINT CO LTD
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