Ultraviolet absorbent Pamsorb-328 | Polymate Additives Co., Limited| Tinuvin 328 (Ciba SC) /Lowilite 28 (Chemtura)/ Uvinul-3028 (BASF)

Polymate Additives Co. |Limited

Add: 206Shi, 101Dong, Huaqiaocheng

Pukou, Nanjing, China, 210031

Tel: +86 (0)25 570 11575

Fax: +86 (0)25 570 16494

Email: polymateadditives@gmail.com

Web: www.PolymateAdditives.com

	Products

.		Antioxidants
		Phenolic Antioxidants
		Plaox-1010, Plaox-1076, Plaox-1098 Plaox-1024, Plaox-3114
		Organophosphite Antioxidants
		Plaox-168, Plaox-626
		Amine Antioxidants
		Plaox-BODPA, Plaox-DNDPA Plaox-DODPA, Plaox-DCDPA
		Thioester Antioxidants
		Plaox-DLTDP, Plaox-DSTDP
		Blended Antioxidants
		Plaox-B215, Plaox-B225

		Heat stabilizers
		Organophosphites
		Pherst-TPP, Pherst-ODPP

.		Light stabilizers
		HALS (hindered amine light stabilizers)
		Palst-770, Palst-622, Palst-944 Palst-783, Palst-791 Palst-3346, Palst-3529
		UVA (Ultraviolet absorbents)
		Pamsorb-531, Pamsorb-P Pamsorb-234, Pamsorb-326 Pamsorb-327, Pamsorb-328 Pamsorb-1164, Pamsorb-1577

.		Flame retardants
		Brominated Flame retardants
		Plamtar-TBBA, Plamtar-BDDP Plamtar-TBSBPE Plamtar-DBDPE, Plamtar-BTBPOE Plamtar-BTBPIE Plamtar-HBCD, Plamtar-TTBPC Plamtar-TBC
		Halogen free Flame retardants
		Plamtar-RDP, Plamtar-BDP Plamtar-DOPO, Plamtar-DOPO-HQ

About us | Products | Service | Contact us

Light stabilizers

Ultraviolet absorbents

__________________________________________________________________________

Ultraviolet absorbent Pamsorb-328

Chemical name: 2-(2'-Hydroxy-3',5'-di-tert-amylphenyl) benzotriazole Equivalent: Tinuvin 328 ( Ciba SC ) /Lowilite 28 (Chemtura)/ Uvinul-3028 (BASF) Molecular formula: C₂₂H₂₉N₃O Molecular weight: 351.5 CAS No.: 25973-55-1 Structural formula:

Physical properties
Appearance: Slightly yellow powders Melting range: 79 ~ 87 °C	Flash point: Not available Specific gravity (g/cm³), @20 °C:0.91
Solubility (g/ 100g solvent), @20 °C
Water: Insoluble Xylene: 44 Mineral spirits:14	Methyl ethyl ketone:24 Ethtylacetate: 20 n-Butylacetate: 28

Specifications
Appearance: Slightly yellow powders Assay: 99.0% min Melting point: 80.0 °C min Ash: 0.05% max	Volatile: 0.5% max Transmittance (460nm): 97.0% min Transmittance (500nm): 98.0% min

Applications
Pamsorb-328 is a UV absorbent for the UV between 270 nm and 380 nm. It is a high effective light stabilizer for a variety of plastics and other organic substrates. It is recommended as the stabilization of styrene home and copolymers, acrylic polymers, unsaturated polyesters, PVC, polyolefins, polyruethanes polyacetals, polyvinylbutyral, elastomers and adhesives. The product can be used alone or in combination with other additives such as HALS, antioxidants and other functional stabilizers and additives. The use levels of Pamsorb-328 range between 0.10 ~ 1.0%, depending on substrate and performance requirements of the final application.

Packing
25kg/bag

__________________________________________________________________________
HALS (hindered amine light stablizers)
Palst-770 \| Palst-622 \| Palst-944 \| Palst-783 \| Palst-791 \| Palst-3346 \| Palst-3529