The new national standard of polyurethane waterproof coating promotes the industry to accelerate the transformation and upgrading

 

Global Coatings Network News:

The reporter learned from relevant departments that the revised "Polyurethane Waterproof Coatings" national standard has been formally implemented recently.
Industry insiders said that with the continuous development of polyurethane waterproof coating technology, its performance is becoming more and more environmentally friendly, and the market prospects are broader.

In 1993, my country began to implement the industry standard for polyurethane waterproof coatings and building materials, and it was revised in 2003.
After more than 10 years of development, the production and application of polyurethane waterproof coatings in my country have undergone great changes.
In order to meet the requirements of the new development and application situation, the relevant state departments once again organized the revision of the national standard of "Polyurethane Waterproof Coatings".

 

 

 

(National high-speed rail construction will drive the demand for polyurethane waterproof coatings)

 

 

New changes give birth to new standards

"Polyurethane coatings are known as'liquid rubber' and are currently one of the best comprehensive performance waterproof coatings.
They can be used for waterproofing and anti-seepage of long-term soaked parts.
" The relevant person in charge of Beijing Dongfang Yuhong Waterproof Technology Co.
, Ltd.
said.

Since the implementation of the national standard of "Polyurethane Waterproof Coatings" revised in 2003, the production and application of polyurethane water-proof coatings have undergone great changes.

In terms of enterprise production scale, after recent years of development, the annual output of Beijing Dongfang Yuhong Waterproof Technology Co.
, Ltd.
, Guangdong Keshun Chemical Industry Co.
, Ltd.
, Wuhan Zhuobao Technology Co.
, Ltd.
, and Sichuan Shuyang Waterproof Material Co.
, Ltd.
From a few thousand tons to more than ten thousand tons at present, the output of other small and medium-sized enterprises has also increased to varying degrees.

In terms of product variety and performance, at the beginning of this century, most companies mainly produced two-component polyurethane waterproof coatings.
Only a few companies such as Beijing Carlisle and Yizhong (Qingdao) produced one-component polyurethane waterproof coatings.
However, in recent years, There are more and more companies producing single-component products, and many companies can also produce single-component and double-component (multi-component) polyurethane waterproof coatings according to engineering needs.
In the past, most companies could only produce Type I polyurethane waterproof coatings with lower tensile properties, and few companies could produce Type II products.
At present, a considerable number of companies can produce both types of products to meet the needs of different projects.

In the field of product application, polyurethane waterproof coatings were initially only used for waterproofing of roofs, kitchens and bathrooms, etc.
, and have now been expanded to be used for waterproofing of underground projects, high-speed railways, urban rail transit, bridges and other projects.

In addition, after recent years of development, the environmental performance of polyurethane waterproof coatings has also been greatly improved.
According to industry insiders, the polyurethane waterproof coatings produced in my country in the early days were all tar-modified, and the production and construction process seriously endangered human health.
In 1999, the state banned the production of tar-modified polyurethane waterproof coatings.
In 2008, the National Development and Reform Commission issued the mandatory industry standard "Limits of Harmful Substances in Building Waterproof Coatings", which improved the environmental performance of products.

The improvement of product quality, the increase of product varieties, the improvement of product performance, and the expansion of product application range made the industry standard of "Polyurethane Waterproof Coatings" revised in 2003 more and more unsuitable to the development of the situation.
New polyurethane waterproof coatings were formulated and implemented.
National standards have become a top priority.
Compared with the standard revised in 2003, the new "Polyurethane Waterproof Coatings" revised the technical requirements, divided the performance into basic performance and optional performance, increased items; increased the limit of harmful substances; modified and increased the test method; increased An informative appendix for the application of materials.

New demand breeds new technology

In the entire coatings market, industrial coatings, including automotive coatings, marine coatings, highway and railway coatings, account for about 70% of the market.
With the continuous development of my country's transportation, the application of polyurethane waterproof coatings continues to increase.
Among them, my country's new high-speed rail projects in recent years have played an important role in stimulating the domestic market for waterproof coatings.

According to the State Council’s “Medium and Long-term Railway Network Planning”, in order to meet the rapid growth of passenger transportation demand, my country will establish fast passenger transport corridors between provincial capital cities and large and medium-sized cities, plan “four vertical and four horizontal” railway fast passenger transport corridors and three inter-city Fast passenger transportation system.
It is estimated that by 2020, my country's high-speed railway construction mileage of 200 kilometers and above will exceed 18,000 kilometers, which will account for more than half of the world's total high-speed railway mileage.
The construction of high-speed railways provides a broad demand for high-performance materials, including the demand for waterproof coatings, especially high-performance polyurethane waterproof coatings .
The high-speed railway plan will greatly accelerate the development of China's waterproof coatings market.
Take the Beijing-Shanghai high-speed railway as an example.
The total length of the Beijing-Shanghai high-speed railway is 1,318 kilometers, with a total waterproofing project of 2 billion yuan.

New application fields also urge companies to continuously improve their technology to adapt to market needs.
Spraying polyurea elastomer technology is a new solvent-free and pollution-free green spraying technology after high-solid coatings, water-based coatings, UV-curing coatings, and powder coatings.
It is an important new coating technology.
In recent years, domestic polyurea spraying technology has developed rapidly, and it has been able to meet the requirements of important projects such as high-speed rail.
In the construction of Beijing-Shanghai high-speed rail projects, some domestic excellent waterproof technology companies such as Guangzhou Supper and Dongfang Yuhong have won the bid.

In addition, under the circumstance that the demand in the international market is generally not strong, enterprises have turned more attention to the domestic demand market.
Under the influence of various factors, my country's polyurethane waterproof coatings have developed rapidly, with more diversified products, higher technological content, and increasing demand.
According to Jia Fanghua, School of Petrochemical Engineering, Liaoning University of Petroleum and Chemical Technology, the state attaches great importance to the building materials industry and has increased the research and development of polyurethane waterproof coatings.
At present, the gap between the level of production technology of polyurethane waterproof coatings in my country and developed countries is gradually narrowing, and the output is also year by year.
It is believed that with the continuous maturity of polyurethane waterproof technology and the continuous emergence of new varieties, its performance will become more and more environmentally friendly.

Cost reduction is the key

Because it is closely related to people's lives, polyurethane waterproof coatings have attracted much attention in the field of construction.
According to the person in charge of Guangzhou Leibangshi Chemical Building Materials Co.
, Ltd.
, polyurethane waterproof coating and polymer cement-based waterproof coating are the two most commonly used waterproof materials in the construction field.
But in contrast, the price of polyurethane waterproof coatings is higher, and because the thickness of the waterproof layer of polyurethane waterproof coatings is a little thicker than that of polymer cement-based waterproof coatings, the amount of materials is naturally larger.
Therefore, the use of polyurethane waterproofing The cost of paint is higher.

Luo Shuiling, the relevant person in charge of the West Railway Company of China Railway Electrification Group Corporation, said that in my country, the price of raw materials used in polyurethane waterproof coatings is much higher than that of other products, which has affected the market share.
One-component polyurethane waterproof coatings (and one-component polyurethane paints), which are currently being studied very hotly, are known as products that can be painted by themselves because of their convenient construction and simple operation.
However, compared with two-component polyurethane waterproof coatings, since the single-component does not have the lower price of the second component and the packaging requirements are high, the price is generally much higher than that of the two-component, which is inconsistent with the economic strength of most regions in my country.
, It is difficult to be widely accepted.

"Reducing the production cost of polyurethane waterproof coatings is still a big problem faced by various manufacturers.
" Luo Shuiling said that currently on the market bituminous polyurethane waterproof coatings have superior performance and lower prices, and are more favored by users, so modified bitumen polyurethane It is still the main direction of scientific research.
At the same time, in accordance with the provisions of the International Environmental Protection Law and the 4E principles for the development of the coating industry based on economy, efficiency, ecology, and energy, the development of water-based, powder-based, high-curing, and low-volatile organic compound (VOC) content environmentally friendly polyurethane waterproofing Coatings will be the future development direction of the industry.
(Source: Global Coatings Network) (For more information, please log in: Global Coatings Network http:// class="info_page">