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IPDI coating crosslinking agent for isophorone diisocyanate
2017-8-20 23:51:37
IPDI coating crosslinking agent for isophorone diisocyanate
The polyisocyanate crosslinking agent suitable for producing polyurethane powder coatings is an internal closed IPDI, which is made in alkaline medium through self - condensation process.
The polyisocyanate crosslinking agent suitable for producing polyurethane powder coatings is an internal closed IPDI, which is made in alkaline medium through self - condensation process.
The content of the free NCO group was extremely low (less than 1%) and the total NCO content was 15.4%. The melting point is within 105-115 range.
The most obvious advantage of the IPDI crosslinking agent and the closed isocyanate is the absence of the byproducts during the crosslinking. Therefore, from a technical point of view, BF1540 crosslinked polyurethane is the best substitute for TGIC powder coatings.
However, BF1540 has been commercialized for more than 15 years, but has not created a satisfied fixed market. This can be attributed to the reaction activity of BF1540 (too) and poor solvent and chemical resistance (due to its functional degree < 2).
IPDI is a colorless or light yellow liquid with camphor, which is completely miscible with ester, ketone, ether, aromatic hydrocarbon and fatty hydrocarbon.
IPDI is aliphatic isocyanate, isophorone diisocyanate IPDI is also a kind of alicyclic isocyanate, isophorone diisocyanate IPDI reactivity is lower than aromatic isocyanate, vapour pressure is low. Isophorone diisocyanate IPDI molecules in two different reactivity, NCO groups, because "NCO IPDI molecules in cyclohexane ring and a - instead of methyl steric effect, makes even in cyclohexane para reactivity of NCO group was 1.3 2.5 times higher than" NCO; The reaction rate of IPDI and hydroxyl is four to five times faster than that of HDI and hydroxyl.
Isophorone diisocyanate IPDI crosslinking agent made of polyurethane resin with excellent light stability and resistance to chemicals, isophorone diisocyanate IPDI commonly used in the manufacture of high-grade polyurethane resin, such as polyurethane coating corrosion resistance, abrasion resistance hydrolysis resistance of polyurethane elastomer, isophorone diisocyanate IPDI also can be used to make not yellowing of microcellular polyurethane foam plastics.
IPDI, or IPDI, is the crosslinking agent for polypropylene glycol (polypropylene glycol). It is widely used in plastics, adhesives, medicine and spices.
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
Flash Point°C161.1°C
It is the fatty group constant yellow isocyanate, with hydroxy, amine and other active hydrogen reaction, but the reaction activity is lower than aromatic isocyanate. It is made from acetone through cyclization, and then by nitrification, ammonification and photogasification. It is mainly used for preparing non-yellowing polyurethane coatings and elastomers.
The industrial products of isopolone diisocyanate IPDI are 75% and trans-isomer 25%, which are invariant yellow fatty isocyanate, and the activity is lower than that of aromatic isocyanate, and the vapor pressure is low. The polyurethane adhesive made from isopolone diisocyanate IPDI has excellent anti-optical stability and chemical resistance, which is used in the manufacture of high-grade polyurethane adhesive. It is a crosslinking agent for polypropylene glycol (polypropylene glycol) for polyurethane adhesive.
Operation precautions: close operation, provide adequate local exhaust. Prevent steam from escaping into the workplace air. Operators must be specially trained to strictly observe the operating procedures. It is recommended that operators wear self-priming filter gas mask (full cover), wear rubber cloth and wear rubber gloves. Stay away from fire and heat sources, smoking is forbidden in the workplace. Use explosion-proof ventilation systems and equipment. No welding, cutting and other operations can be done before removal of liquid and steam. Avoid smoke. Avoid contact with oxidants, alkaloids, alcohols and amines. In particular, avoid contact with water. Equipped with corresponding varieties and quantities of fire fighting equipment and leakage emergency treatment equipment. Empty containers may be harmful.
Storage precautions: stored in a cool, dry, well-ventilated warehouse. Stay away from fire and heat. Prevent direct sunlight. Keep the container sealed, no contact with air. It should be stored separately from oxidants, alkaloids, alcohols and amines. Equipped with corresponding varieties and quantities of fire equipment. The storage area shall be equipped with leakage emergency treatment equipment and suitable shelter materials.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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