Kingsfield Inc. - Uvanone 3C

Uvanone 3C

Chemical and physical characteristics(*)

Chemical Name	2-hydroxy-4-n octyloxy benzophenone
CAS Number	1843-05-6
EINECS Number	217-42-12
Formula	C₂₁H₂₆O₃
Molecular weight	326.4
Appearance	yellow powder
Melting Point (°C)	48
Bulk Density (g/cc)	0.50
TGA(air 20°C/min)
1% loss	210
2% loss	224
10% loss	256
TGA (N2 20°C/min)
1% loss	209
2% loss	223
10% loss	256
Solubility (g/100ml 25°C)
Acetone	>50
Methanol	2
Water	0.0
Ethanol	2.5
Methylethylketone
Diethylhexyl phathalate	25
Benzene	70

(*)Typical values not qualified for quality control purpose

Properties

Uvanone 3C is an UV absorber, belonging to benzophenone derivatives; its absorption capacity ranges from 260 to 350 nm with two maxima of absorbance at 288 and 328 nm. Uvanone 3C does not absorb in the visible region (Figure 1). Uvanone 3C has an excellent solubility in aromatic solvents and in some polar solvents, e.g. ketone. It has a good solubility in plasticizers, it is slightly soluble in alcohols whereas is practically insoluble in water.

Uvanone 3C is compatible with different polymeric materials, particularly with polyolefins, it is thermally stable and is compatible with a broad range of additives, normally used in polymer formulations.

Uvanone 3C shows relevant synergistic effects in combination with Hals and Ni quenchers.

Applications

Uvanone 3C is recommended for the UV Stabilization of:

· Low and high density Polyethylene

· Polypropylene

· Olefin copolymers (EP, EPDM, EPR, EVA)

· Rigid and elastic PVC

· Polystyrene and styrenic copolymers

· Polyesters

· Epoxy resins

Use

The concentration of Uvanone 3C depends on the required service life of the article, on the thickness, presence of pigments, etc. In general we recommend addition level ranging from 0.1 to 1% of Uvanone 3C.

Uvanone 3C is particularly recommended to protect polyolefins from UV effect either in thin or thick articles. Both pigmented and unpigmented plastics can be protected by Uvanone 3C. The best stabilization system is achieved by a combination of Uvanone 3C with a Hals (e.g. Uvasorb HA88) or with a Ni-quencher (i.e. Uvasorb Ni). The combination of Uvanone 3C with Uvasorb HA88 or Uvasorb Ni offers not only a synergistic effect, but improves the cost performance ratio.

Dosage for thin sections

In LDPE,LLDPE,EVA films the use of Uvanone 3C or its synergistic combination with a polymeric Hals or quencher for the stabilization of agricultural greenhouse is strongly suggested. Below we report some typical formulations evaluated in a temperate climate.

Expected Outdoor resistance: 10-13 months

Irradiance (KLy)	Film Thickness (mm)	UVASORB HA 88 FD + UVANONE 3C (% weight)
	100	-	-
<100	150	0.15-0.20	0.15-0.20
	200	0.10-0.15	0.10-0.15

	100	-	-
100-130	150	0.15-0.20	0.15-0.20
	200	0.10-0.15	0.10-0.15

	100	-	-
130-160	150	0.20-0.30	0.20-0.30
	200	0.15-0.25	0.15-0.25

Expected Outdoor resistance: 18-21 months

Irradiance (KLy)	Film Thickness (mm)	UVASORB HA 88 FD + UVANONE 3C (% weight)
	100	-	-
<100	150	0.30-0.40	0.25-0.35
	200	0.20-0.30	0.20-0.30
		N.A.
	100	-	-
100-130	150	0.50-0.70	0.30-0.40
	200	0.40-0.60	0.20-0.30
		N.A:
	100	-	-
130-160	150	0.60-0.80	0.30-0.40
	200	0.50-0.70	0.25-0.35

Expected Outdoor resistance: 10-13 months

Irradiance (KLy)	Film Thickness (mm)	UVASORB Ni + UVANONE 3C (% weight)
	100	-	-
<100	150	0.15-0.30	0.15-0.30
	200	0.10-0.20	0.10-0.20

	100	-	-
100-130	150	0.20-0.30	0.20-0.30
	200	0.15-0.20	0.15-0.20

	100	-	-
130-160	150	0.25-0.35	0.25-0.35
	200	0.20-0.30	0.20-0.30

Expected Outdoor resistance: 18-21 months

Irradiance (KLy)	Film Thickness (mm)	UVASORB Ni + UVANONE 3C (% weight)
	100	-	-
<100	150	0.40-0.50	0.40-0.45
	200	0.35-0.40	0.30-0.40
		N.A.
	100	-	-
100-130	150	0.60-0.70	0.40-0.50
	200	0.45-0.50	0.35-0.45
		N.A:
	100	-	-