CYASORB UV-3638 Chemical Properties

Melting point:

315-317 °C

Boiling point:

522.8±20.0 °C(Predicted)

Density 

1.41±0.1 g/cm3(Predicted)

vapor pressure 

0-0Pa at 20-25℃

storage temp. 

2-8°C

form 

powder to crystal

pka

1.98±0.20(Predicted)

color 

White to Orange to Green

Water Solubility 

112μg/L at 20℃

InChI

InChI=1S/C22H12N2O4/c25-21-15-5-1-3-7-17(15)23-19(27-21)13-9-11-14(12-10-13)20-24-18-8-4-2-6-16(18)22(26)28-20/h1-12H

InChIKey

BBITXNWQALLODC-UHFFFAOYSA-N

SMILES

C1(C2OC(=O)C3=CC=CC=C3N=2)=CC=C(C2OC(=O)C3=CC=CC=C3N=2)C=C1

LogP

4.7 at 22℃

CAS DataBase Reference

18600-59-4(CAS DataBase Reference)

EPA Substance Registry System

4H-3,1-Benzoxazin-4-one, 2,2'-(1,4-phenylene)bis- (18600-59-4)

Safety Information

Hazard Codes 

Xi

Risk Statements 

43-53

Safety Statements 

24-37-61

HS Code 

2934.99.4400

CYASORB UV-3638 Usage And Synthesis

Description

CYASORB UV-3638 is a highly efficient and non-staining UV absorber, which is distinguishied by its superiorly low volatility, and its strong & broad range of UV light absorption together with no color contribution & excellent stabilization for polymers. White UV-3638 is designed to meet the demanding high temperature requirements for processing engineering plastics such as Nylon, PC,PET,PBT and PPO. UV-3638 is also highly effective in other poymers such as polyamides, polyacetals, polyolefins fibers, styrenics, elastomers where long term permanet UV light stability is required.

Chemical Properties

white to off-white crystalline powder.

Uses

Cyasorb 3638 offers very strong and broad UV absorption with no color contribution. Possesses very good stabilization for polyesters(PET) and polycarbonates(PC).3638 is based on a benzoxaxinone structure which delivers a short-term heat stability up to 350 °C and a long term heat stability up to 160 °C.
UV 3638 is ideal for film/sheet/plate applications such as solar cell, window film, etc.

Application

UV-3638 can be readily incorporated in the polymers within the dosage range of 0.1-10% by weight through conventional techniquire such as powder, solution, or melt blending(e.g. extrusion compounding). It can be used alone or in a variety of blends and combinations with antioxidants, phosphites and other light stabilizers where often a synergistic performance is observed. Basically, the dosage level for UV-3638 can be expectd to be 1/3 of the exsited benzotriazole type UV absorbers with the nearly same efficency of UV screenning.
Engineering plastics (Nylone/plycarbonate/PET/PBT/PPO/PPS..etc)
Because of it's superior heat resistance, so its volatility is extremely low during the processing of engineering plastics at temperatures above 300°C. Also, it offering a very strong & broad UV absorption with no color contribution and exllent stabilzation. so it will allow the recycling or reworking of scrap without significant lowss of the UV light stability. UV-3638 meets the stringent requirement of applications where light transmission and optical properties are critical.
Other polymers
Because of its high absorptivity in the range of 300-360nm, plus its extremely low volatility, assures maximal resistance to UV light degradation even during long term indoor and out door exposure.

CYASORB UV-3638(18600-59-4)Related Product Information

• Bisoctrizole
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• 2,2'-Thiobis(4-tert-octylphenolato)-n-butylamine nickel(II)
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• 2,2-Dimethoxy-2-phenylacetophenone
• (1R)-(-)-10-Camphorsulfonic acid
• Light Stabilizer 770
• Fluorescent Brightener 367
• Fluorescent Brightener 378
• UV-329
• 2-(2'-Hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole