PROBLEM TO BE SOLVED: To provide a hair cosmetic capable of imparting smoothness and gloss to the hair and improving the combing properties of the hair.SOLUTION: There is provided a hair cosmetic containing 1 wt.ppm or more of a collagen-like synthetic polypeptide represented by the following formula (I). H-X-OH (I) [wherein, X contains a repeating unit A and a repeating unit Z the repeating unit A is a residue of a peptide chain having an amino acid sequence represented by the following formulas (a), (b) and (c): Pro-Y-Gly (a), Y-Gly-Pro (b) and Gly-Pro-Y (c) in the formulas (a), (b) and (c), Y is Pro or Hyp, the repeating unit Z is an amino acid residue such as glycine and the value of m/n which is the ratio between the number m of the repeating units A and the number n of the repeating units Z is 100/0 to 10/90.]SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】毛髪になめらかさ、および光沢を与えるとともに、櫛通り性の改善を可能にする毛髪用化粧料を提供する。【解決手段】 下記式(I)で表されるコラーゲン様合成ポリペプチドを1重量ppm以上含む毛髪用化粧料により、本課題を解決した。 H-X-OH (I)[式(I)中、Xは、繰り返し単位Aおよび繰り返し単位Zを含み、 繰り返し単位Aは下記式(a)、(b)または(c)で表されるアミノ酸配列を有するペプチド鎖の残基であり、 Pro-Y-Gly (a) Y-Gly―Pro (b) Gly-Pro-Y (c)式(a)、(b)、(c)中、YはProまたはHypであり、 繰り返し単位Zは、グリシン等のアミノ酸残基であり、 繰り返し単位Aの単位数mと、繰り返し単位Zの単位数nとの比であるm/nの値が100/0~10/90である]【選択図】なし
