Light Stabilizer UV-622

Chemical Name		Butanedioic acid, polymer with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol
Formula		H[C₁₅H₂₅O₄N]_nOCH₃
Structure
CAS NO.		70198-29-7
Molecular Weight		>2500
Specifications	Appreance	White powder or light yellow granules
	Melting Point	50-70 ^oC
	Ash	≤0.1%
	Loss On Drying	≤0.5%
	Transmittance	425 nm≥95% 500 nm≥97%
Advantage and Application		Polymerized HALS with high molecular weight, low volatility, low degradation,hardly extractable(by water) or bleachable (bygas),and fine heat stability,working well with AO and UVA;Widely used in PP, PE, PS, ABS, PU, POM, TPE etc.
Solubility (20^oC:g/100g Solvent)		Water	Ethyl acetate	N-hexane	Methanol	Aceton
		<0.01	>50	41	3	>50
Package		25 KG cartons or drums