57834-33-0 Usage
Description
UV-1 is highly effective for the light stabilization of PUR in a wide range of applications, including microellular foams and integral skin foams for
footwear, conventional rigid and flexible foams, fabric coatings for artificial leather, adhesives, sealants, and elastomers (spray, RIM, etc.). lItis
conveniently added to PUR systems as a solution in the polyol component (polyether- or polyester-based).
Physical properties
UV-1(Ethyl 4-[[(methylphenylamino)methylene]amino]benzoate) is a high efficient anti-ultraviolet additive. It is widely used in adhesives, polyurethane, foam and other materials. Because of its excellent absorption property, the ultraviolet radiation in 240-340nm is effectively absorbed and the ultraviolet radiation in the 300-330nm is nearly absorbed completely. Its anti-ultraviolet effect is 1.1-1.4 times as efficient as the UV absorbers of benzophenone or benzotriazole types.
Uses
UV-1(Ethyl 4-[[(methylphenylamino)methylene]amino]benzoate) has good effect on the polymer system and it has good compatibility with the resin. The anti-yellowing effect is excellent. Its effect is superior to the other UV agent for PU. It is widely used in PU foaming, PU coating, PU leather, PU board and resins etc.
Industrial uses
UV absorber UV-1 is a liquid formamidine type ultraviolet absorber, it has a very strong UV absorption spectrum peak between 300-330nm, in this region polyurethane is susceptible to radiation degradation. So it has excellent light stability to microporous polyurethane products such as foam, integral skin foam, traditional foam, semi-rigid, soft foam, fabric coating, some adhesives, sealants and elastomers.It is convenient to use and miscible with polyester polyol and polyether polyols, has high solubility in many solvents, and has good compatibility with isocyanates and other polyurethane additives(such as light stabilizer 292).In polyurethane,normal usage level range is 0.2-1.0%.In adhesives and sealant,concentration level normally range is 0.5-1.0%.
Synthesis
165 g (1 mol) of ethyl p-aminobenzoate, 117.7 g (1.1 mol) of N-methylaniline, 10 g of p-toluenesulfonic acid,200mL with toluene toluene added to the 1000mL reaction flask, stirred and warmed to 50-60 ° C, 2h dropwise 59.53g (1.1mol) formic acid(Content of 85%),Heating to reflux reaction, continue to separate the generated water, the reaction of about 5h to stop water when there is no water. The reaction solution was distilled off with atmospheric toluene recovery agent, toluene was recovered, the remaining vacuum distillation reaction solution,A pale yellow viscous liquid N- (4-ethoxycarbonylphenyl) -N'-methyl-N'-phenyl formamidine 262g, yield 93%, purity 99.4%.
Check Digit Verification of cas no
The CAS Registry Mumber 57834-33-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,8,3 and 4 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 57834-33:
(7*5)+(6*7)+(5*8)+(4*3)+(3*4)+(2*3)+(1*3)=150
150 % 10 = 0
So 57834-33-0 is a valid CAS Registry Number.
57834-33-0Relevant articles and documents
Novel preparation method of N-(4-ethoxycarbonyl phenyl)-N'-methyl-N'-phenyl formamidine
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Paragraph 0012-0017, (2020/12/29)
The invention discloses a preparation method of N-(4-ethoxycarbonyl phenyl)-N'-methyl-N'-phenyl formamidine. The method comprises the following steps: by taking ethyl p-aminobenzoate and N-methylformanilide as initial raw materials, continuously separating out water generated by reaction in the presence of a water-carrying agent, and carrying out one-step reaction to obtain the N-(4-ethoxycarbonylphenyl)-N'-methyl-N'-phenyl formamidine. The method is simple in process and convenient to operate, only water is generated as a byproduct, and the method is safe, environment-friendly and pollution-free.
Synthesis technology of N-(ethoxycarbonylphenyl)-N'-methyl-N'-phenyl amidine
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Paragraph 0027; 0033-0083, (2018/11/03)
The invention discloses a synthesis technology of N-(ethoxycarbonylphenyl)-N'-methyl-N'-phenyl amidine, and belongs to the technical field of chemical synthesis. The synthesis technology is one-step,that is, ethyl p-aminobenzoate, trialkyl orthoformate and N-methylaniline are added simultaneously, and N-(ethoxycarbonylphenyl)-N'-methyl-N'-phenyl amidine is synthesized from petroleum ether as a solvent and glacial acetic acid as a catalyst by one step. Besides, a water separator is arranged on a reaction vessel and pre-filled with frozen liquid. The solvent can be recycled after refining, no toxic solvent is needed for post-treatment, the byproduct methanol can be discharged from the reaction system in time, and the yield is increased. The whole technological process has low reaction temperature and short reaction time, and the synthesis technology has the advantages of low energy consumption, low cost, low pollution and high yield.
Preparation method of N,(4-ethyoxyl carbonyl phenyl)-N'-methyl-N'-phenyl formamidine
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Paragraph 0014; 0015; 0017; 0018; 0020; 0021, (2017/04/03)
The invention discloses a preparation method of N,(4-ethyoxyl carbonyl phenyl)-N'-methyl-N'-phenyl formamidine. According to the method, ethyl p-aminobenzoate, orthoformic acid trialkyl ester and N-methylaniline are adopted as original raw materials, activated aluminum oxide is adopted as a catalyst, and N,(4-ethyoxyl carbonyl phenyl)-N'-methyl-N'-phenyl formamidine is prepared through a one-step reaction. The method is simple in process, convenient to operate, free of contamination and high in product purity, and the adopted catalyst aluminum oxide can be recycled.
