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Title:
N-VINYL LACTAM-BASED CROSSLINKED POLYMER, COSMETIC, ABSORBENT AGENT FOR INK, AND ABSORBENT COMPOSITE
Document Type and Number:
WIPO Patent Application WO/2018/008759
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a cross-linked polymer which has excellent moisture retention, excellent ethanol absorption capability, and which, when applied to the skin as a cosmetic, has excellent adhesion to the skin and a high active component concentration. This N-vinyl lactam-based crosslinked polymer has N-vinyl lactam-derived structural units and cross-linking agent-derived structural units, and is characterized by having an ethanol absorption capability of 3-40g per 1g of the N-vinyl lactam-based crosslinked polymer, and in that the ratio of particles with an aspect ratio, calculated with the method below, of 1.15-10 is 10-100% (by number) of the total number of N-vinyl lactam-based crosslinked polymer, and the water-soluble portion is less than or equal to 35 mass% per 100 mass% of the entire polymer. The major axis and minor axis of primary particles of the N-vinyl lactam-based crosslinked polymer is measured with an optical or electron microscope, and the aspect ratio is calculated as the quotient of the long axis divided by the short axis.

Inventors:
IKEMOTO, Yui (5-8, Nishiotabicho, Suita-sh, Osaka 34, 〒5640034, JP)
OKAMURA, Kazuhiro (5-8, Nishiotabicho, Suita-sh, Osaka 34, 〒5640034, JP)
Application Number:
JP2017/025038
Publication Date:
January 11, 2018
Filing Date:
July 07, 2017
Export Citation:
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Assignee:
NIPPON SHOKUBAI CO., LTD. (1-1 Koraibashi 4-chome, Chuo-ku Osaka-sh, Osaka 43, 〒5410043, JP)
International Classes:
C08F26/06; A61K8/81; A61L9/01; A61Q19/00
Foreign References:
JP2012072277A2012-04-12
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JPH105582A1998-01-13
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JP2000239342A2000-09-05
JP2006272734A2006-10-12
Attorney, Agent or Firm:
YASUTOMI & ASSOCIATES (5-36, Miyahara 3-chome Yodogawa-ku, Osaka-sh, Osaka 03, 〒5320003, JP)
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