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Benzophenones Based Ultraviolet Absorbers

PowerSorb™ 3000

2,4-Dihydroxybenzophenone.
Chemical Structure
Introduction / Features
PowerSorb™ 3000 is a UV absorber that is effective in the 280 – 320 nm range. It is soluble in common organic solvents and readily compatible with many polymers.
Physical Properties
Chemical Name: 2,4-Dihydroxybenzophenone
CAS No.: 131-56-6
EINECS No.: 205-029-4
Formula: C13H10O3
Molecular Weight: 214
Gardner color value(2% in methanol): 3
Melting Point: 140-143°C
Gardner color: Max.5
Appearance: Off-white powder
Content of active substance: 100%

Solubility (20°C) % w/w
Acetone: >10
Ethyl acetate: 25
Methanol: 40
Ethanol: 40
Methyl ethyl ketone: 40
Methyl methacrylate: 5
N-Methylpyrrolidone: >20
Styrene: 0.5
Toluene: <1
Water: <0.01

Applications
Polystyrene: prevention of yellowing.
Polymethacrylates: improvement of optical and mechanical properties(eg, of transparent extruded sheet).
Rubber-based adhesives: stabilization of adhesive properties.
Alkyd and phenolic resins: improvement of fastness to weathering. Epoxy resin/unsaturated polyesters: retardation of aging.
Packings
PowerSorb™ 3000 is supplied in 25Kg plastic drum
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