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Sun Care with Reduced Fabric Staining Disclosure Number: IPCOM000250088D
Publication Date: 2017-May-30
Document File: 89 page(s) / 3M

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UV filter systems for sunscreen performance claims on Fabric staining reduction, Anti-sand adhesion, IR, Vis, long UVA protection

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Sun Care with Reduced Fabric Staining

Abbreviation & INCI of Uv filters cited in this document

EHS: ethylhexyl salicylate OCR: octocrylene EHT: ethylhexyl triazone DBT: Diethylhexyl butamido triazone TiO2: titanium dioxide (nano) BMDBM: Butyl Methoxydibenzoylmethane TDSA: Terephthalylidene dicamphor sulfonic acid DTS: Drometrizole trisiloxane BEMT: Bis-ethylhexyloxyphenol Methoxyphenyl Triazone DHHB: Diethylamino hydroxybenzoyl hexyl benzoate TBPT: Tris-Biphenyl Triazine (active of Tinosorb A2B) MBBT: Methylene bis-benzotriazolyl tetramethylbutylphenol (active of Tinosorb M) EHMC: Ethylhexyl Methoxycinnamate PBSA: Phenylbenzimidazol sulfonic acid

UV filter systems for sunscreen performance claims on

Fabric staining reduction Anti-sand adhesion IR, Vis, long UVA protection

Reduced fabric staining All sun care products which meet EC recommendation for UVA protection and contain oil soluble UVA filters such as Diethylamino hydroxybenzoyl hexyl benzoate (DHHB), Butyl Methoxydibenzoylmethane (BMDBM) or Bis- ethylhexyloxyphenol Methoxyphenyl Triazone (BEMT) cause fabric staining Most market products in Europe (independent from the UVA filter used) inform their customers about the risk of fabric staining when the sunscreen is in direct contact with fabric Stains caused by sunscreens can be removed by repeated washing, best with liquid detergent. Best effects are achieved combination with the use of a pre spotter containing solvents. In case this is no solution dry cleaning will remove stains completely. As the UVA regulation has been implemented in Europe years ago, the “staining issue” of sunscreens is known by consumers. Requests in this direction decreased significantly in the past years. Choice of the filter combination (i.e. incorporation of water dispersible UV filters with efficient UVA protection (i.e. Tris-Biphenyl Triazine and / or Methylene bis- benzotriazolyl tetramethylbutylphenol, Aqua, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Polymethyl Methacrylate, Sodium Laureth Sulfate, Aminomethyl Propanol -Tinosorb S Aqua), by reduction of oil soluble UVA filters will help.

Color measurement and staining Colorimetric principles

CIE L*a*b Method and whiteness according to Ganz / Griesser Equipment: Datacolor SF400 Mean value of 4 measurement spots

L*a*b*: Characterization with 3 parameters: L* (lightness), a* (red-green), b* (blue – yellow) Difference of color between stain and substrate:

)2 )2 )²) If stains are only yellow, E b* Visibility of stain is expressed by b*

I White


-a L"



l+a red



Color measurement and staining

Summary: Color measurement and staining

Application Dilution: 10% formulation in water or ethanol Best reproducibility with 300mg / stain = 15mg / cm² Number of stains / formulation: 2 (accept. stdv, efficient measurement cycles) Whiteness of fabric substrate: WG 170 ± 10, after washing WG 190 ± 10

Staining test method b* is measured as difference between

b* of stain and substrate (white fabric) b* = b*stain...