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Super-strength polyurethane waterproof coating and preparation method thereof

A polyurethane waterproof and ultra-high-strength technology, applied in the field of building waterproof materials, can solve the problems of insufficient physical indicators such as wear resistance and impact resistance, and poor performance of polyurethane waterproof coatings.

Inactive Publication Date: 2012-05-02
BEIJING LIGAO WATERPROOF ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the progress of society, the rapid development of the construction industry, the continuous improvement of people's living standards and the emergence of various new waterproof materials, the performance of existing polyurethane waterproof coatings seems a bit inferior, especially the tensile strength, which is currently used by ordinary waterproof coatings. The tensile strength of polyurethane waterproof coating is only 2.45MPa, and the tensile strength of high-strength polyurethane waterproof coating for railway is only 6.0MPa
In addition, physical indicators such as wear resistance and impact resistance are also insufficient.
Therefore, it is not suitable for some important engineering use

Method used

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  • Super-strength polyurethane waterproof coating and preparation method thereof
  • Super-strength polyurethane waterproof coating and preparation method thereof
  • Super-strength polyurethane waterproof coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] 1. Raw material composition

[0088] Group A is divided into:

[0089] Polyether N220 60.0 parts by weight

[0090] Polyether Dl2000 15.0 parts by weight

[0091] MDI-100 25.0 parts by weight

[0092] Group B is divided into:

[0093]

[0094]

[0095] 2. Preparation method

[0096] The preparation method of polyurethane waterproof coating of the present invention carries out according to the following steps:

[0097] a. First, spray the reactor with solvent twice and then dry it for later use;

[0098] b. Check the tightness of the joints of the reactor and the suitability of the vacuum pump to ensure that the vacuum in the reactor can meet the production requirements of the product;

[0099] c. Start the vacuum pump, open the vacuum valve and the suction valve, and draw the quantitative ratio of polyether in the formula into the reaction kettle. Then, close the vacuum valve;

[0100] d. Turn on the high-speed mixer, and at the same time open the steam va...

Embodiment 2

[0107] 1. Raw material composition

[0108] Group A is divided into:

[0109] Polyether EP2000 65.0 parts by weight

[0110] Polyether Dl2000D 20.0 parts by weight

[0111] MDI-50 15.0 parts by weight

[0112] Group B is divided into:

[0113]

[0114]

[0115] 2. Preparation method

[0116] The preparation method of polyurethane waterproof coating of the present invention carries out according to the following steps:

[0117] a. First, spray the reactor with solvent twice and then dry it for later use;

[0118] b. Check the tightness of the joints of the reactor and the suitability of the vacuum pump to ensure that the vacuum in the reactor can meet the production requirements of the product;

[0119] c. Start the vacuum pump, open the vacuum valve and the suction valve, and draw the quantitative ratio of polyether in the formula into the reaction kettle. Then, close the vacuum valve;

[0120] d. Turn on the high-speed mixer, and at the same time open the steam ...

Embodiment 3

[0127] 1. Raw material composition

[0128] Group A is divided into:

[0129]

[0130]

[0131] Group B is divided into:

[0132]

[0133] 2. Preparation method

[0134] The preparation method of polyurethane waterproof coating of the present invention carries out according to the following steps:

[0135] a. First, spray the reactor with solvent twice and then dry it for later use;

[0136] b. Check the tightness of the joints of the reactor and the suitability of the vacuum pump to ensure that the vacuum in the reactor can meet the production requirements of the product;

[0137] c. Start the vacuum pump, open the vacuum valve and the suction valve, and draw the quantitative ratio of polyether in the formula into the reaction kettle. Then, close the vacuum valve;

[0138] d. Turn on the high-speed mixer, and at the same time open the steam valve that supplies heat to the reactor, and start to heat up. When the temperature rises to 80°C, turn on the vacuum pump ...

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Abstract

The invention relates to a super-strength two-component polyurethane waterproof coating which is made of petroleum resin. The polyurethane waterproof coating is prepared by the following method. The raw materials of the polyurethane waterproof coating comprise a component A and a component B, wherein the component A contains 60.0-70.0 parts of polyether diol, 10.0-20.0 parts of polyether polyol and 15.0-25.0 parts of chain extender by weight; and the component B contains 30.0-35.0 parts of chlorinated paraffin, 20.0-25.0 parts of vulcanizing agent, 5.0-10.0 parts of polyether polyol, 10.0-15.0 parts of petroleum resin, 15.0-20.0 parts of filler, 0.03-0.1 parts of assistant and 5.0-10.0 parts of solvent by weight. Since the petroleum resin is added into the raw materials of the super-strength two-component polyurethane waterproof coating and has unsaturated bonds which can be bonded with polyurethane in the generation process of the polyurethane to increase the length of molecular chains, the tensile strength and the elongation at break of the coating film are greatly improved and the mechanical properties are better than that of the product in which the petroleum resin is not added. At the same time, since the price of the petroleum resin is low, the material is convenient to obtain, the cost of the two-component polyurethane waterproof coating product is low and the economic benefit is greater.

Description

technical field [0001] The invention relates to a building waterproof material, in particular to a two-component polyurethane waterproof coating with super high tensile strength prepared by using ordinary petroleum resin as an auxiliary material. Background technique [0002] At present, the polyurethane waterproof coating supplied on the market in my country has two specifications of one-component polyurethane waterproof coating and two-component polyurethane waterproof coating. The two-component polyurethane waterproof coating is divided into two groups of ordinary strength according to the level of tensile strength. One-component polyurethane waterproof coating and high-strength two-component polyurethane waterproof coating. After several years of practical application, polyurethane waterproof coating has many advantages, such as: [0003] 1. The coating film has excellent low temperature resistance. It can be used in alpine regions below -40°C, which greatly expands the...

Claims

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Application Information

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IPC IPC(8): C09D175/02C09D175/08C09D157/02C08G18/32C08G18/48
Inventor 王政昌房文静段霓华赵文龙周择东
Owner BEIJING LIGAO WATERPROOF ENG CO LTD
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