Polyurethane anticorrosion coating crosslinking agent

Polyurethane anticorrosion coating crosslinking agent,Polyurethane anti-corrosion paint variety, can be suitable for a variety of purposes. Two-component pu coating, room temperature crosslinking hydroxyl are the main varieties of polyurethane anti-corrosion paint. With outstanding weathering resistance and oil resistance. Epoxy coal tar anti-corrosion paint is made of epoxy resin, coal tar pitch, pigments, additives, made from modified amine.

Products with a fast drying, adhesion, flexibility good, two-component packaging, construction is convenient. With adjustable excellent comprehensive performance, can form a rigid, also can form elastic coatings. There are good toughness, wear resistance and low temperature crosslinking.

Formula of wide adaptability, as well as with various resins, additives, improve performance, and for various environmental protection coating.

Due to the coating of isocyanate group (NCO) components of volatile and reactivity, in coating processing, transportation, storage and construction should take note. The composition of polyurethane anti-corrosion paint polyurethane is refers to the molecular structure of polymer containing amino formic acid ester bond. Carbamate bond formed by isocyanate and hydroxyl reaction.

Therefore, the polyurethane resin monomer is much isocyanate and polyol. Isocyanate with aromatic and aliphatic. Because the former is relatively cheap, room temperature reactivity is bigger, so the most used in anti-corrosion paint the former and rarely USES the latter, the latter only if there is a requirement for decorative outdoor coating surface QiZhongCai adopt, in order to improve the storage, construction and coating film performance, often make more isocyanate monomer containing swim divorced cyanate based polyurethane prepolymer or adduct.

In addition to the available polyol crosslinking isocyanate, more other compounds containing active hydrogen can response, including water and amine as important, because can occur under normal temperature and low temperature crosslinking reaction, but the reaction to form instead of urea. The adaptability of polyurethane anti-corrosion paint and comprehensive performance is good, can adapt to the complex working conditions.




Chinese name: Diethyl toluene diamine(DETDA)

Diethyltoluenediamine Raw material ：

TDA industrial, Sichuan production

Ethylene (Et) polymer grade, Shanghai production

TEA industrial imports

A reagent grade additives


Polyurethane rubber has the very high tensile strength (typically to 28 ~ 42 mpa, up to 70 mpa) and tear strength; Elasticity is wonderful, even in high hardness, also has the high elasticity; Elongation at failure is very big, generally can reach 400% ~? 600%, the biggest can reach 1000%; Has the very wide range of hardness, the lowest for Shao Er (A) 10, mostly Shao Er (A)? 45 ~ 95. When the hardness is higher than Shao Er 70 (A), the tensile strength and stretch stress is higher than that of natural rubber, when the hardness reaches Shao Er (A) 80 ~ 90, the tensile strength, tear strength and stretch stress is also very high.

Polyurethane rubber with good oil resistance, at room temperature, for most of the oil and solvent resistance of patience is better than NBR; Has excellent wear resistance, its wear resistance than natural rubber high 9 times, more than 3 times the styrene-butadiene rubber; With good air tightness, when hardness is higher, the air tightness is close to butyl rubber; It has good resistance to oxygen, ozone and ultraviolet radiation resistant ability; Also has good cold resistant performance.

However, due to the effect of secondary crosslinking of the polyurethane rubber at high temperature are destroyed, so the tensile strength, tear strength, oil resistance are obviously decline along with the rise of temperature. The rubber for a long time continuous working temperature scope generally is 80-90 ℃, and short time using temperature is 120 ℃.

Rigid polyurethane has excellent thermal performance, its coefficient of thermal conductivity coefficient of thermal conductivity is lower than air (polyurethane heat conduction coefficient 0.023 W/m.K / 25 ℃ or less; air thermal conductivity coefficient of 0.025 W/m.K / 25 ℃ or less), are the commonly used thermal insulation materials engineering can't match with them. 50 mm thickness of PU rigid foam insulation effect is equivalent to 80 mm thick EPS, 90 mm thick mineral wool, 100 mm thick cork, 280 mm thick boards or 760 mm thick concrete.

So if made from rigid polyurethane insulation materials, wall insulation layer will become thinner, buildings will lighten the weight, the living area of the building will also increase.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

Diethyl toluene diamine(DETDA)  http://www.yaruichem.com