It is an elastomer waterproof coating produced by mixing and reacting the two components with isocyanate compounds (referred to as component A) and amine compounds (referred to as component B). The material is sprayed on site with highly reactive amino-terminated polyether and amine chain extender. It is a new type of two-component waterproof coating with no solvent, no volatile matter and high solid content.
According to the components, the products are divided into two types: JNC sprayed (pure) polyurea waterproof coating and JNJ sprayed polyurethane (urea) waterproof coating.
Products are classified into Type I and Type II according to their physical and mechanical properties.
●Excellent mechanical properties with high strength, high elongation, wear resistance and adjustable hardness;
●Strong impact resistance and anti-cracking ability, can withstand heavy construction and walking, ballast and coarse aggregate will not cause damage to the coating film;
●Excellent waterproof performance, the coating film is continuous, dense and seamless;
●Excellent adhesion, can bond firmly with concrete, steel and other substrates;
●Excellent anti-corrosion ability, can resist the erosion of various chemical media;
●Good aging resistance, high solid content, no volatile solvent, zero pollution, it is an environment-friendly product.
●The landscape performance is good, and it can be adjusted into various colors in harmony with the surrounding landscape as required.
●Good temperature adaptability, can be used for a long time in the environment of -50°C~150*C.
●Quick curing, 10 seconds to gel, 1 minute to get on people, no sagging on the facade, short construction period and high efficiency.
This product is widely used in railway, tunnel, bridge, subway engineering waterproofing; petroleum pipelines, chemical storage tanks, steel bridges, ship deck protection; workshop floors, sewage treatment pools, long-term flooding and chemical media erosion projects.
[Execution standard GB/T 23446-2009 "Spraying Polyurea Waterproof Coatings"]
Table 1 Basic performance
|| Solid content/% ≥
|| Gel time/s ≤
|| Surface dry time/s ≤
|| Tensile strength/MPa ≥
|| Elongation at break/%, ≥
|| Tear strength/N/mm ≥
|| Low temperature bendability/'℃ ≤
||0.4MPa 2h watertight
|| Bonding strength/Mpa ≥
|| Water absorption/% ≤
|| Heating stretch rate/%
|| Elongation ≤
| shorten ≤
Table 2 Special properties
|| Hardness (Shore A) ≥
|| Wear resistance / ( 750g/500r/mg) ≤
|| Impact resistance/ (kg. m) ≥