Spraying polyurethane elastomer technology with 100% solid content was successfully developed in North America in the 1970s. At present, it has become one of the most widely used anti-corrosion coating technologies in North America, which represents the development direction of the coating industry in the 21st century and has a successful application history of more than 30 years all over the world. In 1997, Marine chemical researchers in China introduced key spraying equipment and developed SPUA technical formula and construction technology with independent intellectual property rights. After more than 20 years of development, spraying polyurethane technology has made great progress in China. The application scope of 100% solid content polyurethane anticorrosion coating covers many fields such as pipeline anticorrosion, chemical tank anticorrosion, drinking water and industrial sewage system, oil and gas industrial system, port and wharf facilities, etc. With the continuous expansion of application scope and the success of application practice, 100% solid polyurethane anticorrosive coating has been trusted by more and more customers.
Ⅱ. Advantages
Ø Fast curing, a few seconds gel, facade, surface continuous spray flow.
Ø insensitive to humidity/temperature, no foam, has a very wide temperature adaptability, can be in normal curing to 40℃ to 65℃.
Ø 100% solid content, no volatile organic compounds, no combustible materials, in line with the requirements of environmental protection, construction process safety is guaranteed.
Ø No amine, coal tar and other toxic substances, the construction process will not cause pollution to the environment, harmless to the human body.
Product Display
Ⅲ. Properties
1. The adhesion
Spraying polyurea material has good adhesion to metal, concrete, plastic, wood and other substrates. Through proper formula selection, a system with adhesion strength exceeding its own strength can be obtained. In the pipeline anticorrosion application, the pipeline anticorrosion material does not need the supporting primer, but can be directly sprayed on Sa2.5 grade sandblasted steel, with the adhesion greater than 15Mpa. As can be seen from the table, some substrates have been pulled out, which indicates that the adhesion between the sprayed polyurea material and the substrates is very good.
Adhesion of sprayed polyurethane to various substrates
substrate
Aromatic
aliphatic
Concrete(without primer)
2.8
2.8
concrete (with primer)
6.8
6.9
Steel (Sandblast to Sa2.5 level)
18
10
aluminum
13.7
---
plywood
1.7
1.7
2. Wear resistance
According to the laboratory to its abrasion performance determination, spray polyurethane anticorrosive coating wear resistance is 5 to 7 times of ordinary natural rubber, is 10 times more than carbon steel. The material not only has high strength, but also has good buffering and energy absorption performance. Spraying polyurethane anticorrosive coating has strong wear resistance, which determines that it can be widely used in the operation of rough stone belt, the external anticorrosion of pipeline crossing, high flow rate and high abrasion.
3. Media resistance
Spray polyurethane material compact, continuous, no joints, effectively prevent the invasion of external corrosion media, corrosion performance is very prominent. In addition to dimethyl formamide, methylene chloride, hydrofluoric acid, sulfuric acid, nitric acid and concentrated phosphoric acid strong dissolution, strong corrosive medium, for the most part it resists corrosion medium long-term immersion (25 ℃).
Dielectric resistance of spray polyurethane
Media
Soak result
Media
Soak result
acetic acid (10%)
good
ammonium nitrate
good
hydrochloric acid (10%)
good
gasoline
good
sulfuric acid (20%)
good
diesel
good
phosphoric acid(10%)
good
kerosene
good
citric acid
good
crude oil
good
lactic acid
Good Slight discoloration
hydraulic oil
good
sodium hydroxide(20%)
Good
antifreeze agent
good
Sodium hydroxide (50%)
Good Slight discoloration
xylene
Good Slight discoloration
potassium hydroxide (10%)
good
n-hexane
good
potassium hydroxide (20%)
Good, Slight discoloration
carisoprodol
good
ammonium hydroxide
good
4. Salt spray resistance
Common pipeline anticorrosive materials such as epoxy powder fused with salt spray resistance test generally do not exceed 500 hours, the actual service life of less than 20 years. As the coating of polyurethane material is dense, continuous and without joints, its salt spray resistance is very good. Spray polyurea material after 10,000 hours of salt spray test, the results show that: even the thinnest 1mm coating, there is no corrosion phenomenon, its buried service life can be up to 50 years.
5. Outdoor aging resistance
Spraying polyurethane material has excellent aging resistance. Although in the aromatic spray polyurethane material, there will be yellowing phenomenon, but not pulverization and cracking. Aromatic polyurethane spray materials after 50 ℃, 3871 hours of artificial accelerated ageing of the retention of physical properties such as before and after the experiment
Comparison of LD50 value polyurethane & amine cured epoxy resin
product
LD50(mg/kg)
polyurethane (PU)
polymeric MDI
5000-10000
polyhydric alcohols
2000-5000
amine cured epoxy resin
amine
500-4000
epoxy resin
≤2000
Company Information
Shanghai Cloud chemical co., LTD, Expert in PCM, is a company focusing on R&D and customization of high-end chemical industry. The company is located in Shanghai Zhangjiang high-tech park. Our PCM has been Widely used in textile, home appliances, construction, transportation, medical and other fields. At present our products have been exported to Europe and the United States, India, the industry has been praised.
Our Team
We have a group of positive enthusiasm, lovely and motivated team. We love our work, especially the green and energy-saving high-tech PCM field. When the customer has a goal, but the idea is not clear, we suggest the customer free design program, and we give the most professional energy saving and efficient program.
Cooperative Partner
Now our customers are almost all over the world, southeast Asia, Europe, the United States, South America, involving in the textile, construction, medical, transportation, home appliances, cosmetics, and other industries.
