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This paper presented the polyurea protective project of Beijing-Shanghai High Speed Railway. It also reviewed the polyurea history in China, introduced research and development of polyurea in Qingdao Technological University. The analysis and discussion on the application problems exposed in the Beijing-Shanghai High Speed Railway project were performed in this paper.
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For years, people have relied upon a variety of industry accelerated testing methods in order to predict how long a coating / lining system may be useful in service. This type of testing would include heat aging, Atlas Cell immersion testing for lining products and accelerated weatherometer testing for coating systems, just to name a few. Polyurea spray applied elastomeric materials have been no exception to this type of testing. One of the most important testing evaluations has been accelerated weatherometer exposure for products used in outdoor application areas.
The paper will outline the following: 1. Process from when a customer approaches the polyurea supplier with a set of problems they need to overcome and the important issue of understanding what the customer and the job requirements really are. 2. How to evaluate and determine if the products you have available are suitable or not. 3. The process of having the customer write specifications based on what the applicator can realistically deliver and accomplish.
Polyurethane coating systems on parking structures are designed to prevent leaks, protect the concrete from deterioration, and prevent corrosion in the reinforcing steel
The Occupational Safety and Health Act of 1970 (OSH Act) was passed to protect workers from death or serious harm and requires employers to provide their employees with working conditions that are free of known dangers. The Act created the Occupational Safety and Health Administration (OSHA), which sets and enforces protective workplace safety and health standards.
Polyurethane technologies have demonstrated their applications in a variety of seamless polymer flooring systems. Aliphatic polyurethanes are widely used as topcoats since they provide combinations of good color stability, gloss retention, abrasion resistance, chemical resistance, and weathering resistance. Recent development in polyaspartic chemistry offers more options in coating thickness, curing temperatures, and solids content.
Spray applied polyurea was introduced to the construction industry in the late 1980 s. By the 1990 s, polyurea floor systems were being installed using early formulations of polyurea, and spray equipment adapted from the polyurethane foam industry. Advancement in raw materials, polyurea formulations, specialized equipment and contractor expertise in recent years has provided increased opportunities for this technology to be used in a wide variety of concrete flooring applications.
This project is to evolve, with the developer of a portable, sponge media blasting system, an alternative to power tool corrosion removal. This is a NAVSEA project managed by the National Surface Treatment Center (NST Center).
Portable plural component low-pressure equipment Utilizing Synergistic Chemistry addresses untapped niche market proves to be provides added growth to the industry.
In today’s protective coating industry, there is a growing demand to proportion and spray 100% solids coatings that are high viscosity and composed of materials that make them compressible during processing. Epoxy intumescent fireproofing is one such material that starts as compressible in the pail and becomes more compressible when heated and agitated under air pressure.
New high-solids compounds for two-component (2K) topcoats based on polyurethane, polyurea and polysiloxane binders are examined with respect to their competitive potential in Europe. Against the backdrop of EU-wide VOC legislation, the relevant market for OEM topcoats applied in stationary facilities is currently estimated at 20,000 t with a material value of a good EUR 100 million.
Potential measurements are often referred to as the ‘language’ of corrosion. They are the most fundamental process in the field of corrosion control. The purpose of potential measurements is to obtain a general idea of the ‘health’ of the cathodic protection system.