UV absorber-928

Bezeichnung:UV absorber-928

CAS-Nr73936-91-1

Englisch Name:UV absorber-928

CBNumberCB6291367

SummenformelC29H35N3O

Molgewicht441.61

MOL-Datei73936-91-1.mol

UV absorber-928 physikalisch-chemischer Eigenschaften

Schmelzpunkt	112 °C
Siedepunkt	555.5±60.0 °C(Predicted)
Dichte	1.07
Löslichkeit	soluble in Toluene
Aggregatzustand	powder to crystal
pka	8.05±0.50(Predicted)
Farbe	White to Orange to Green
InChI	InChI=1S/C29H35N3O/c1-27(2,3)19-28(4,5)21-17-22(29(6,7)20-13-9-8-10-14-20)26(33)25(18-21)32-30-23-15-11-12-16-24(23)31-32/h8-18,33H,19H2,1-7H3
InChIKey	UZUNCLSDTUBVCN-UHFFFAOYSA-N
SMILES	C1(O)=C(C(C)(C2=CC=CC=C2)C)C=C(C(C)(C)CC(C)(C)C)C=C1N1N=C2C=CC=CC2=N1
EPA chemische Informationen	Phenol, 2-(2H-benzotriazol-2-yl)-6-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)- (73936-91-1)

Sicherheit

HS Code

2933.99.8290

UV absorber-928 Chemische Eigenschaften,Einsatz,Produktion Methoden

Chemische Eigenschaften
light yellow crystalline powder
Application
UV absorber-928(Tinuvin 928) is a UV absorber of the hydroxyphenyl benzotriazole class developed specially for high performance coating applications. Its characteristic broadband absorption provides efficient protection to coatings and light sensitive substrates. Its excellent solubility and high thermal and environmental permanence makes it particularly suitable for coatings exposed to high temperature curing processes, such as powder and coil coatings, or high environmental stress. Tinuvin 928 is recommended for applications such as:
automotive coatings
powder and coil coatings
hot melt adhesives
exterior construction coatings (roofing, etc.)
construction adhesives and sealants
Application
UV-928 has broad absorption properties which can effectively protect coating and other photosensitive materials.The product has high solubility, high temperature resistant and good environmental durability and so on..It is suitable for high performance coatings, especially suitable for powder coating and industrial and automotive coatings. UV-928 can be enhanced when used in combination with a HALS stabilizer such as UV-292 or UV-123.
Flammability and Explosibility
Not classified
Synthese

In a dry argon atmosphere 0.150 g of oxime 5, 0.070 g of 1,2-phenylene diamine 1 and 0.150 ml triethyl-borate are dissolved in 4 ml dry THF and heated for 24 h at 60°C. After a TLC shows consumption of starting oxime the mixture is evaporated to dryness and the resulting residue purified by column chromatography (eluent: hexane - ethyl acetate: 10-1 vol/vol) to give 0.171 g (92 %) of the diazo-amine intermediate 6. Replacing the B(OEt)3 by 2.5 g of basic AI2O3 and the THF by 2 ml of xylene and heating this mixture to 140°C for 48 h gives after the usual work-up 0.089 mg of diazo compound 6 and 0.300 g of starting oxime 5. According the procedure given for the preparation of compound 4 in example 1, triazole 7 is obtained from 0.007 g (0.016 mmol) of intermediate amine 6 and 0.020 g (0.122 mmol) CuSO4 in 100% (0.007 g). In this comparative example, 7.73 equivalents of copper salt are used.

UV absorber-928 Upstream-Materialien And Downstream Produkte

UV absorber-928 Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

73936-91-1, UV absorber-928 Verwandte Suche:

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