Environment-friendly polyurethane waterproof coating and preparation method thereof

A polyurethane waterproof and coating technology, applied in the field of coatings, can solve problems such as aging resistance, poor mechanical properties, and environmental pollution, and achieve the effects of improving mechanical properties, simple preparation methods, and delaying UV aging chain breakage

Inactive Publication Date: 2017-12-08
HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems that existing polyurethane waterproof coatings mostly contain volatile components and organic solvents, causing serious environmental pollution, aging resistance and poor mechanical properties, the present invention provides an environmentally friendly polyurethane waterproof coating

Method used

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  • Environment-friendly polyurethane waterproof coating and preparation method thereof

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preparation example Construction

[0025] The present invention also provides a kind of preparation method of environment-friendly polyurethane waterproof coating, at least comprises the following steps:

[0026] The preparation method of the A component at least comprises the following steps:

[0027] Take each component according to the above-mentioned raw material proportioning;

[0028] mixing the polyether diol and polyether triol, heating, vacuum decompression, dehydration, and cooling to obtain the first mixture;

[0029] Add the first mixture, montmorillonite, and nano-silica to the reactor, add toluene-2,4-diisocyanate under stirring conditions, raise the temperature to 70°C-80°C, and carry out the reaction to prepare component A Polyurethane waterproof coating prepolymer;

[0030] The preparation method of the B component at least includes the following steps:

[0031] Take each component according to the above-mentioned raw material proportioning;

[0032] Add dispersant, petroleum distillate oil...

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Abstract

The invention relates to the technical field of coatings and in particular relates to an environment-friendly polyurethane waterproof coating and a preparation method thereof. The environment-friendly polyurethane waterproof coating comprises components A and B. The component A comprises the following substances in parts by weight: 20-30 parts of polyether glycol, 30-50 parts of polyether triol, 3-6 parts of montmorillonite, 3-6 parts of nano silicon dioxide and 4-7 parts of methylbenzene-2,4-diisocyanate; the component B comprises the following substances in parts by weight: 6-8 parts of water, 0.5-1 part of a dispersant, 8-12 parts of petroleum fraction oil, 3-6 parts of calcium hydroxide, 3-6 parts of talc powder, 3-6 parts of light calcium carbonate and 0.3-0.6 part of a plasticizer. By taking water or other diamines and polyhydric alcohol as a curing agent, the coating does not contain volatile organic compounds, so that the coating is harmless to the environment and has excellent mechanical properties and anti-ageing property.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to an environmentally friendly polyurethane waterproof coating and a preparation method thereof. Background technique [0002] Polyurethane waterproof coating is favored by domestic and foreign waterproofing circles for its excellent performance, and it is one of the key waterproof materials developed in my country. Most of the polyurethane waterproof coatings in my country contain volatile components and organic solvents, and the commonly used curing agents are suspected to be carcinogenic substances, which seriously pollute the environment. Moreover, polyurethane waterproof coatings usually use polyether as the basic raw material, which requires high moisture content of the base layer, poor heat and oxygen aging resistance, and poor UV aging resistance. Although ultraviolet absorbers and antioxidants can be added to improve its weather resistance, they cannot be fundamentally ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D7/12C08G18/76C08G18/48
CPCC09D175/08C08G18/4812C08G18/4825C08G18/4829C08G18/7614C08K3/34C08K3/346C08K3/36C08K13/02C08K2003/265C08K2201/011
Inventor 白培培胡中源董立志
Owner HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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