Skip to main content
padlock icon - secure page this page is secure

Development of a water-resistant and detergent-washable powder coated with a stimuli-responsive polymer and its application to suncare products

Buy Article:

$52.00 + tax (Refund Policy)

IFSCC Magazines, 12 (2009) (1) 3–7

It is generally well known that the surface of an inorganic UV-protective powder used in a sunscreen formula is treated with a fatty acid or other hydrophobic chemicals to obtain a high water resistance. Due to the resulting strongly hydrophobic surface, the treatment has a clear drawback in that it allows the sunscreen to leave its base components on the skin after washing with regular soap. Therefore, in this study to develop an intelligent sunscreen formula that has a high water resistance and can be washed away easily with regular soap, we focused on a pH-responsive polymer as the surface-treatment agent for a UV-protective powder. Numerous experiments led to the synthesis of the 2-acrylamido-2-methyl-1-propanesulfonic acid/11-methacrylamidoundecanoic acid (AMPS/MAU) copolymer, which is hydrophobic in acidic to neutral solution and hydrophilic in basic solution. Titanium dioxide subjected to surface treatment was treated with the AMPS/MAU copolymer showed a high pH-responsiveness that was similar to that of the polymer. A W/O-type sunscreen containing the pH-responsive titanium dioxide showed a high water resistance as well as a high washability with regular soap. Keywords: 

Detergent-washable, pH-responsive polymer, pH-responsive powder, sun care product, water-resistant
No References
No Citations
No Supplementary Data
No Article Media
No Metrics

Document Type: Abstract

Affiliations: 1: Shiseido Research Center, 2-2, Hayabuchi, Tsuzuki-ku, Yokohama-shi, 224-8558, Japan 2: Department of Food Science, Faculty of Dairy Science, Rakuno Gakuen University, 582, Bunkyodai Midorimachi, Ebetsu, Hokkaido, 069-8501, Japan 3: Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo, 2167, Shosha, Himeji, 671-2280, Japan

Publication date: December 1, 2009

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more