SURFACE TREATMENT POWDER

• Main Authors: KUMEI TAKAYUKI, IWAMOTO CHIHIRO, WATANABE JUNJI
• Format: Patent
• Language: English; Japanese
• Published: 11.04.2016
• Subjects: ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; HUMAN NECESSITIES; HYGIENE; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MEDICAL OR VETERINARY SCIENCE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; PREPARATION OF CARBON BLACK; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES

PROBLEM TO BE SOLVED: To provide a surface treatment agent which is a cosmetic material, is hydrophobic during dry and achieves cosmetic maintaining and wash-off property when become hydrophilic by contacting with water.SOLUTION: There is provided a surface treatment powder where a surface of the powder is coated by a first block copolymer represented by the formula (1). (1), where Rand Rare each independently an alkyl group, a polyoxyalkylene group, an acyl group, a phenyl group and an aralkyl group, X is a C1 to 18 alkyl chain which may form ether by substituting not-neighboring carbon with oxygen, Y is a single bond or a bivalent connecting group, Zis H or a methyl group and n and m are polymerization degrees.SELECTED DRAWING: Figure 1 【課題】化粧料であって、乾燥時には疎水性であるが、水に接触すると親水性となることで、化粧もちと洗い流し性とを両立した表面処理粉体の提供。【解決手段】式（１）で表される第１のブロック共重合体ブロック共重合体で粉体表面が被覆されている表面処理粉体。（Ｒ１、Ｒ２は各々独立にアルキル基、ポリオキシアルキレン基、アシル基、フェニル基、アラルキル基；Ｘは隣接しない炭素が酸素に置換されてエーテルを形成してもよいＣ１〜１８のアルキル鎖；Ｙは単結合又は２価の連結基；Ｚ１はＨ、又はメチル基；ｎ及びｍは重合度）【選択図】図１