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- Nachgewiesen in: USPTO Patent Grants
- Sprachen: English
- Patent Number: 11535,717
- Publication Date: December 27, 2022
- Appl. No: 16/776524
- Application Filed: January 30, 2020
- Assignees: JNC CORPORATION (Tokyo, JP), NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY (Tokyo, JP)
- Claim: 1. An ionic composite material comprising lignin sulfonic acid, its derivatives, or its salts, and ε-polylysine, its derivatives, or its salts, wherein a proportion of a total amount of lignin sulfonic acid, its derivatives or its salts and ε-polylysine, its derivatives or its salts in the entire ionic composite material is 50 to 97 weight %, and the content of water is 3 to 50 weight % of the entire ionic composite material.
- Claim: 2. The ionic composite material according to claim 1 , wherein the ionic composite material has elasticity.
- Claim: 3. The ionic composite material according to claim 1 , wherein the ionic composite material has a self-healing ability.
- Claim: 4. The ionic composite material according to claim 1 , wherein a salt of lignin sulfonic acid or a derivative thereof is a metal salt.
- Claim: 5. The ionic composite material according to claim 4 , wherein the metal salt is selected from the group consisting of sodium salts, calcium salts, and magnesium salts.
- Claim: 6. The ionic composite material according to claim 1 , wherein the ε-polylysine has a weight average molecular weight of 500 to 1,000,000.
- Claim: 7. The ionic composite material according to claim 1 , wherein the ionic composite material has a sheet form with a thickness of 1 to 10 mm.
- Claim: 8. A method of producing the ionic composite material according to claim 1 , the method comprising: a process of mixing lignin sulfonic acid, its derivatives, or its salts, and ε-polylysine, its derivatives, or its salts into a solvent to form an ionic complex in the solvent; and a process of removing the solvent from a solution or suspension containing the ionic complex.
- Claim: 9. The method according to claim 8 , wherein the process of forming the ionic complex is performed by mixing a solution containing lignin sulfonic acid, its derivatives, or its salts and a solution containing ε-polylysine, its derivatives, or its salts.
- Claim: 10. The method according to claim 8 , wherein the process of removing the solvent is performed by volatilizing the solvent from the solution or suspension containing the ionic complex.
- Claim: 11. The method according to claim 8 , wherein the solvent is water.
- Claim: 12. The method according to claim 11 , wherein the process of removing the solvent is performed by introducing the solution or suspension containing the ionic complex into an organic solvent.
- Patent References Cited: 20080226565 September 2008 Huybrechts ; 20140005129 January 2014 Gu ; 20190225808 July 2019 Naskar ; 107950538 April 2018 ; H11152410 June 1999 ; 2006133299 May 2006 ; 2018159064 October 2018 ; 2019112526 July 2019 ; 2013133705 September 2013 ; WO-2020016730 January 2020
- Other References: English-language machine translation of CN-107950538-A, obtained from Espacenet on Sep. 3, 2021, 12 pages. cited by examiner ; Xiaoping Shen, et al., “Preparation and comparison of bulk and membrane hydrogels based on Kraft- and ionic-liquid-isolated lignins,” Green Chemistry, Jul. 2016, pp. 5607-5620. cited by applicant ; Stéphanie Laurichesse, et al., “Chemical modification of lignins: Towards biobased polymers,” Progress in Polymer Science, vol. 39, Nov. 2013, pp. 1266-1290. cited by applicant ; Youhua Tao, et al., “New chemosynthetic route to linear ϵ-poly-lysine,” Chemical Science, Jul. 2015, pp. 6385-6391. cited by applicant ; Office Action of Japan Counterpart Application, with English translation thereof, dated Jun. 14, 2022, pp. 1-8. cited by applicant
- Primary Examiner: Heincer, Liam J
- Attorney, Agent or Firm: JCIPRNET
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