Formulary

Emulsifier-Free Sunscreen Milk with SPF 15

February 1, 2011


Phase A
Sylvaclear PA1200V (Arizona Chemical) (Polyamide-3)
4.00
Propylene glycol
5.00
Parsol MCX (Roche) (Ethylhexyl methoxycinnamate (octinoxate)
7.50
Finsolv TN (Innospec) (C12-15 alkyl benzoate)
5.00
DC 200 350 cSt (Dow Corning) (Dimethicone)
7.00
Carbopol ETD 2020 (Noveon) (Acrylates/C 10-30 alkyl acrylate crosspolymer)
0.30
Jeecide Cap-4 (Jeen) (Phenoxyethanol, caprylyl glycol)
1.30

Phase B
TTO-S-4 (Kobo) (Titanium dioxide, aluminium hydroxide stearic acid)
4.00

Phase C
Water
62.70

Phase D
BPD- 500 (Kobo) (HDI trimethylol hexyllactone crosspolymer, silica)
2.00

Phase E
Sodium Hydroxide (Sol. 10%) (Sodium hydroxide, water)
1.20

Procedure
Heat phase A to 95°C until uniform. Premix phase B and add to phase A. Heat phase C to 75°C while stirring. Add phase C to phase A+B and mix with high agitation. Mixture will look non-homogeneous until phase inversion. Add phase D to phase A+B+C and mix until uniform. Cool to room temperature and adjust the pH with phase E until desired range. Note: Phase inversion will occur between 45-55°C and lotion will become smooth and uniform. SPF 15 based on BASF Sunscreen Simulator.

Properties
pHu20146.75-7.50; Viscosity Rangeu20143000-7000 cPs (Brookfield DV-II+ Pro, Spindle 5 @ 20rpm, 1 min - 20°C); Stabilityu20143 months at RT and 42°C, 1 month at 50°C.

More Information
Arizona Chemical, Tel: 904-928-8884, Fax: 904-928-8779, Email: tom.fontana@azchem.com, Website:u2002www.arizonachemical.com

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