News Details
Polyurethane coating agent with polyisocyanate coatings
2017-8-16 11:42:09
Polyurethane coating agent with polyisocyanate coatings
The synthesis, properties and application of diisocyanate monomer and polyurethane with polyisocyanate crosslinking agent, water dispersible polyisocyanate and closed-type polyisocyanate were introduced in this paper.
Polyurethane coating is a kind of coating technology that began to rise in the 1960s. It has been widely used in automobile original factory, repair paint, plastic paint, wood paint, industrial paint, fabric leather coating and printing ink industry.
As countries of volatile organic compounds (VOC) content of attention, in the 1990 s, aqueous polyisocyanate coating technology breakthrough, since then, add the polyurethane with polyisocyanate crosslinking agent of waterborne two-component polyurethane coatings for a wide range of applications.
The main techniques and applications of isocyanate monomer and polyurethane with polyisocyanate crosslinking agent, water dispersible polyisocyanate and closed-type polyisocyanate were described.
The type and properties of isocyanate monomer. The industrial production of diisocyanate is mainly fatty isocyanate and aromatic isocyanate. The fatty isocyanates are mainly six methyl-diisocyanate (HDI), isopolone diisocyanate (IPDI), dicyclohexyl methane diisocyanate (H12MDI). Aromatic isocyanates are mainly 2, 4 - and 2, 6 - toluene diisocyanates (TDI) and diphenylmethane - 4, 4 '- and/or -2, 4' -diisocyanate (MDI). Fatty isocyanate resistance to yellowing; Aromatic isocyanates are prone to yellowing in light.
Isocyanates are the general term for various esters of isocyanates. If the number of - NCO groups is classified, including monoisocyanate R - N = C = O and diisocyanate O = C = n-r-n = C = O and polyisocyanate, etc.
Chinese name: Diethyl toluene diamine(DETDA)
Chinese alias: aryl, aryl diethyl - aryl - methyl-p-phenylenediamine
English name: Benzenediamine, ar, ar-diethyl-ar-methyl-English aliases:Diethyltoluenediamine; ar, ar-Diethyl-ar-methylbenzenediamine;Diethylmethylbenzenediamine;
CAS No. :68479-98-1
EINECS No. :270 -877-4
Molecular formula: C11H18N2
Molecular Weight: 178.28
Boiling point: 310 ℃
Refractive index: 1.581
Flash Point: > 140 ℃
Inchi: InChI = 1/C11H18N2/c1-4-8-6-7 (3) 10 (12) 11 (13) 9 (8) 5-2/h6H ,4-5,12-13H2 ,1-3H3 density : 1.022
Risk Codes: R10; R35
RIDADR: UN 3082
Safety instructions: S2; S26; S39; S61
Packing Group: III
The synthesis, properties and application of diisocyanate monomer and polyurethane with polyisocyanate crosslinking agent, water dispersible polyisocyanate and closed-type polyisocyanate were introduced in this paper.
Polyurethane coating is a kind of coating technology that began to rise in the 1960s. It has been widely used in automobile original factory, repair paint, plastic paint, wood paint, industrial paint, fabric leather coating and printing ink industry.
As countries of volatile organic compounds (VOC) content of attention, in the 1990 s, aqueous polyisocyanate coating technology breakthrough, since then, add the polyurethane with polyisocyanate crosslinking agent of waterborne two-component polyurethane coatings for a wide range of applications.
The main techniques and applications of isocyanate monomer and polyurethane with polyisocyanate crosslinking agent, water dispersible polyisocyanate and closed-type polyisocyanate were described.
The type and properties of isocyanate monomer. The industrial production of diisocyanate is mainly fatty isocyanate and aromatic isocyanate. The fatty isocyanates are mainly six methyl-diisocyanate (HDI), isopolone diisocyanate (IPDI), dicyclohexyl methane diisocyanate (H12MDI). Aromatic isocyanates are mainly 2, 4 - and 2, 6 - toluene diisocyanates (TDI) and diphenylmethane - 4, 4 '- and/or -2, 4' -diisocyanate (MDI). Fatty isocyanate resistance to yellowing; Aromatic isocyanates are prone to yellowing in light.
Isocyanates are the general term for various esters of isocyanates. If the number of - NCO groups is classified, including monoisocyanate R - N = C = O and diisocyanate O = C = n-r-n = C = O and polyisocyanate, etc.
Chinese name: Diethyl toluene diamine(DETDA)
Chinese alias: aryl, aryl diethyl - aryl - methyl-p-phenylenediamine
English name: Benzenediamine, ar, ar-diethyl-ar-methyl-English aliases:Diethyltoluenediamine; ar, ar-Diethyl-ar-methylbenzenediamine;Diethylmethylbenzenediamine;
CAS No. :68479-98-1
EINECS No. :270 -877-4
Molecular formula: C11H18N2
Molecular Weight: 178.28
Boiling point: 310 ℃
Refractive index: 1.581
Flash Point: > 140 ℃
Inchi: InChI = 1/C11H18N2/c1-4-8-6-7 (3) 10 (12) 11 (13) 9 (8) 5-2/h6H ,4-5,12-13H2 ,1-3H3 density : 1.022
Risk Codes: R10; R35
RIDADR: UN 3082
Safety instructions: S2; S26; S39; S61
Packing Group: III
Hazard Class: 6.1
Monoisocyanate is an important intermediates of organic synthesis, which can be used to make a series of urethane insecticides, fungicides and herbicides, as well as to improve the water resistance of plastics, fabrics and leather. Functional groups and above isocyanates can be used to synthesize a series of excellent polyurethane foam plastics, rubber, elastic fibers, coatings, adhesives, synthetic leather, artificial wood and so on.
The largest and most widely used products are: Toluene Diisocyanate (TDI); Methylenediphenyl Diisocyanate (MDI).
Polyisocyanates are made from diisocyanate monomers of fatty and aromatic groups. Will diisocyanate addition polymerization as the cause of polyisocyanate, in addition to occupational health problems, and can improve the function of polyisocyanate after polymerization degree, after polymerization, polyisocyanate functionality is greater than 2, and the reactant (such as alcohol and amine) reaction can be obtained after the three-dimensional mesh crosslinking structure, the crosslinking density of the paint film is high, the paint film with high resistance and patience. In addition, the characteristics of isocyanate itself are still present in the polymer, such as fatty polymer has better resistance to yellowing properties than aromatic polymers. And aromatic polyisocyanate reaction produced paint film is harder.
Closed - type polyisocyanate: the NCO group of polyisocyanate can produce stable polymer at normal temperature. It is called closed - type polyisocyanate. The closed - type polyisocyanate and polyol resin can obtain stable coating at normal temperature. In the baking condition, the sealing agent dissolves at high temperature, releasing NCO group and crosslinking reaction with the component of polyol resin.
The advantages of the closed-type polyisocyanate are easy to operate and are insensitive to atmospheric humidity and can be prepared with a single component polyurethane coating with adequate storage stability. However, the advantages of easy operation also have the limitation that the closed type polyisocyanate is only used in high temperature baking system. Industrial products mainly include: butyl ketone oxime, dimethyl pyrazole (DMP), malonic ester and diisopropylamine, diisopropylamine/malonic ester, diisopropylamine/triazole, epsilon - caprolactam, cyclopentanone - 2 - carboxyl methyl ester (CPME), nonylphenol and so on.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Monoisocyanate is an important intermediates of organic synthesis, which can be used to make a series of urethane insecticides, fungicides and herbicides, as well as to improve the water resistance of plastics, fabrics and leather. Functional groups and above isocyanates can be used to synthesize a series of excellent polyurethane foam plastics, rubber, elastic fibers, coatings, adhesives, synthetic leather, artificial wood and so on.
The largest and most widely used products are: Toluene Diisocyanate (TDI); Methylenediphenyl Diisocyanate (MDI).
Polyisocyanates are made from diisocyanate monomers of fatty and aromatic groups. Will diisocyanate addition polymerization as the cause of polyisocyanate, in addition to occupational health problems, and can improve the function of polyisocyanate after polymerization degree, after polymerization, polyisocyanate functionality is greater than 2, and the reactant (such as alcohol and amine) reaction can be obtained after the three-dimensional mesh crosslinking structure, the crosslinking density of the paint film is high, the paint film with high resistance and patience. In addition, the characteristics of isocyanate itself are still present in the polymer, such as fatty polymer has better resistance to yellowing properties than aromatic polymers. And aromatic polyisocyanate reaction produced paint film is harder.
Closed - type polyisocyanate: the NCO group of polyisocyanate can produce stable polymer at normal temperature. It is called closed - type polyisocyanate. The closed - type polyisocyanate and polyol resin can obtain stable coating at normal temperature. In the baking condition, the sealing agent dissolves at high temperature, releasing NCO group and crosslinking reaction with the component of polyol resin.
The advantages of the closed-type polyisocyanate are easy to operate and are insensitive to atmospheric humidity and can be prepared with a single component polyurethane coating with adequate storage stability. However, the advantages of easy operation also have the limitation that the closed type polyisocyanate is only used in high temperature baking system. Industrial products mainly include: butyl ketone oxime, dimethyl pyrazole (DMP), malonic ester and diisopropylamine, diisopropylamine/malonic ester, diisopropylamine/triazole, epsilon - caprolactam, cyclopentanone - 2 - carboxyl methyl ester (CPME), nonylphenol and so on.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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