Title:
FILM COMPOSITION CONTAINING TANNIC ACID DERIVATIVE AND METHOD FOR PRODUCING SAID FILM COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2017/204359
Kind Code:
A1
Abstract:
[Problem] To provide a self-supporting multifunctional film that is mainly composed of a natural polyphenol such as tannic acid.
[Solution] A self-supporting film composition according to the present invention contains a tannic acid derivative wherein 12% to 24% of hydroxyl groups in tannic acid are bonded via urethane bonds that are formed through a reaction with cyanate groups. It is preferable that this self-supporting film composition additionally contains a precursor polymer so that 45-65% by mass of the tannic acid and 55-35% by mass of the precursor polymer are contained therein. Preferably, the precursor polymer has a structure wherein second linear hydrocarbon compounds are bonded to both ends of a first linear hydrocarbon compound via urethane bonds; and more preferably, the precursor polymer has a diisocyanate group that has oligoethylene glycol as a spacer. It is preferable that the ratio of the urethane bonds contained in the precursor polymer to the hydroxyl groups contained in the tannic acid is from (12:88) to (24:76) (inclusive) in terms of a molar ratio.
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Inventors:
NAITO MASANOBU (JP)
BANSAL JOGINDER (JP)
PAYRA DEBABRATA (JP)
BANSAL JOGINDER (JP)
PAYRA DEBABRATA (JP)
Application Number:
PCT/JP2017/019811
Publication Date:
November 30, 2017
Filing Date:
May 26, 2017
Export Citation:
Assignee:
NAT INST MATERIALS SCIENCE (JP)
International Classes:
C08L75/08; C08G18/32; C08J5/18; C08K5/10
Foreign References:
| JP2015113411A | 2015-06-22 | |||
| JPS5840372A | 1983-03-09 | |||
| JP2017019238A | 2017-01-26 |
Other References:
GRASSINO S B ET AL.: "Photoactive films obtained from methacrylo-urethanes tannic acid-based with potential usage as coating materials: analytic and kinetic studies", PROG ORG COATING, vol. 37, no. 1/2, November 1999 (1999-11-01), pages 39 - 48, XP055442164, ISSN: 0300-9440
GOGOI SATYABRAT ET AL.: "Bio-based high-performance waterborne hyperbranched polyurethane thermoset", POLYM ADV TECHNOL, vol. 26, no. 6, June 2015 (2015-06-01), pages 589 - 596, XP055442169, ISSN: 1042-7147
GOGOI SATYABRAT ET AL.: "Bio-based high-performance waterborne hyperbranched polyurethane thermoset", POLYM ADV TECHNOL, vol. 26, no. 6, June 2015 (2015-06-01), pages 589 - 596, XP055442169, ISSN: 1042-7147
Attorney, Agent or Firm:
MATSUMOTO Satoru et al. (JP)
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