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Broad Spectrum SPF ~17 Sunscreen Cream



Published May 1, 2010
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1. HallBrite OS USP (HallStar) (Ethylhexyl salicylate [octisalate])
5.00
2. HallBrite BHB (HallStar) (Butyloctyl salicylate)
3.00
3. HallStar GC (HallStar) (Caprylic/capric triglyceride)
2.25
4. SolaStay S1 (HallStar) (Ethylhexyl methoxycrylene)
2.50
5. Polycrylene (HallStar) (Polyester-8)
3.00
6. Benzyl alcohol (Alfa Aesar) (Benzyl alcohol, ACS, 99+%, )
0.50
7. Neo Heliopan BB (Symrise) (Benzophenone-3)
0.49
8. Parsol 1789 (DSM) (Butyl methoxydibenzoylmethane [avobenzone])*
3.00
9. Brij S721 (Croda) (Steareth-21)
1.00
10. Brij S2 (Croda) (Steareth-2)
0.35
11. HallStar TA-1618 (HallStar) (Cetearyl alcohol)
0.35
12. Performa V 1608 LM (New Phase Technologies) (C30-38 olefin/isopropyl maleate/MA copolymer)
0.80
13. Emulsiphos (Symrise) (Potassium cetyl phosphate, hydrogenated palm glycerides)
3.00
14. Water (Deionized)
55.52
15. Versene NA (Dow Chemical) (Disodium EDTA)
0.10
16. Tris Amino (Dow/Angus) (Tromethamine )
0.04
17. 1,3-Butylene Glycol (Celanese) (Butylene glycol)
2.00
18. Superol K (P&G Chemicals) (Glycerine 99.7% USP/FCC Kosher)
3.00
19. CoSept PEP (HallStar) (Phenoxyethanol, methylparaben, ethylparaben, butylparaben, propylparaben, isobutylparaben)
0.60
20. Simulgel 600 (Seppic) (Acrylamide/sodium acryloyldimethyltaurate copolymer, isohexadecane, polysorbate 80)
2.50
21. SF 1202 (Momentive) (Cyclopentasiloxane)
4.00
22. Velvesil 125 (Momentive) (Cyclopentasiloxane, C30-45 alkyl cetearyl dimethicone crosspolymer)
4.50
23. Dry-Flo PC (AkzoNobel) (Alum. starch octenylsuccinate)
2.50
*No substitution permitted

Procedure
In secondary vessel combine 1-6, start mixing, add 7 and 8, and heat this oil phase to 90°C. Add 9-13 in order. To the main vessel add 14, start mixing, add 15 and, when dissolved, add 16. Heat to 90°C. In a separate vessel premix 17-19 and add to this water phase just prior to combining phases. When oil and water phases are uniform and at the defined temperatures, add the oil phase to the water phase with strong mixing without aeration. After 10 minutes, start homogenizing and start cooling.  When the batch is at 55°C, stop homogenizing and resume sweep mixing. When the batch is at 50°C add 20. In a separate vessel dilute 22 in 21 and, when uniform, add to batch. When the batch is again uniform add 23. Continue stirring until a smooth, homogeneous lotion.  Perform final quality assurance checks.

Properties
(25°C): Appearance—Yellow cream; pH—5.9; Viscosity (RV, T-D, 5, 20 & 100 rpm; cP)—106800, 29000, 8400.

More Information
The HallStar Company, Tel: (877) 427-4255; Email: customerservice@hallstar.com;
Website: www.hallstar.com


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