Experts teach you how to identify waterproof coati

2022-07-22
  • Detail

The commonly used waterproof materials for decoration are petroleum asphalt polyurethane waterproof coating, environmental friendly polyurethane waterproof coating and polymer cement waterproof coating

the commonly used waterproof materials for decoration are petroleum asphalt polyurethane waterproof coating, environmental friendly polyurethane waterproof coating and polymer cement waterproof coating

polyurethane waterproof coating has been widely used in waterproof engineering because of its excellent physical and chemical properties. Among them, tar polyurethane is the most widely used. However, with the development of society and the improvement of people's living standards, people began to pay more attention to environmental protection and their own health. Coal tar contains a lot of aliphatic and aromatic compounds, which have a strong pungent smell. Anthracene, naphthalene and other components are very harmful to human body. People pay more and more attention to the pollution of tar polyurethane to the environment. In 1997, the Beijing Municipal Construction Committee put forward the hope that the production enterprises would develop environmental friendly polyurethane waterproof coatings. At the end of 1998, the "on limiting and eliminating tar based polyurethane waterproof coatings" was issued

the Beijing Municipal Construction Commission also encourages development Six kinds of environmental friendly polyurethane waterproof coatings are recommended:

(1) one component polyurethane waterproof coating

(2) color polyurethane waterproof coating

(3) inorganic filler polyurethane waterproof coating

(4) water curing polyurethane waterproof coating

(5) petroleum asphalt based polyurethane waterproof coating

(6) petroleum resin polyurethane waterproof coating

the first four kinds are not widely used in the market because of their high cost, The latter two have become the development direction of enterprises and have been applied in the market. Now we advocate the promotion of non tar polyurethane waterproof coating, mainly based on environmental protection requirements

difference between tar type and non tar type polyurethane waterproof coating

1 smell

tar type: there is a serious irritant smell, and the film has a bad smell

non tar type: only slight odor or tasteless, and the coating has no obvious odor

2 coating combustion method

tar type: it has pungent smell, produces thick black smoke and contains black flocs, and burns rapidly

non tar type: it has pine flavor or slight smell, produces a small amount of black smoke, burns slowly, and does not burn when leaving the fire source

3 mixing method

tar type: the viscosity increases at the initial stage of mixing, that is, there is thickening during mixing

non tar type: the viscosity is basically unchanged during mixing, and there is no thickening phenomenon

through the above three methods, we can basically qualitatively judge the tar type and non tar type polyurethane waterproof coatings, so as to prevent the tar type polyurethane coatings from counterfeiting the non tar type into the market

中山男科医院

长春牛皮癣医院

上海耳鼻喉医院

Copyright © 2011 JIN SHI