Patent application EP20176253A (EP), filed 2020-05-25
Publication number: EP3757159A1
Title: NANOCELLULOSE/SURFACTANT COMPOSITE
Abstract: [0001]    The present invention provides nanocellulose/surfactant composites having excellent redispersibility in water and related compositions and methods, including methods for producing the composites. Included is a nanocellulose/surfactant composite containing a nanocellulose and a surfactant, the nanocellulose/surfactant composite having a moisture content of lower than 10%, the surfactant including an ionic surfactant having a weight average molecular weight of 3000 or more.
IPC codes: C08L   1/    02            A I
C08L   1/    04            A I
C08L   7/    00            A I
Claims: number: 1
text: A nanocellulose/surfactant composite, comprising a nanocellulose and a surfactant,
the nanocellulose/surfactant composite having a moisture content of lower than 10%,
the surfactant comprising an ionic surfactant having a weight average molecular weight of 3000 or more.
number: 2
text: The nanocellulose/surfactant composite according to claim 1,
wherein the nanocellulose comprises at least one of a microfibrillated cellulose or a cellulose nanocrystal.
number: 3
text: The nanocellulose/surfactant composite according to claim 2,
wherein the microfibrillated cellulose has an average fiber diameter of 2 to 50 nm, an average fiber length of 10 µm or less, and a degree of crystallinity of 60 to 90%.
number: 4
text: The nanocellulose/surfactant composite according to claim 2,
wherein the cellulose nanocrystal has an average fiber diameter of 2 to 50 nm, an average fiber length of 500 nm or less, and a degree of crystallinity of 70% or more.
number: 5
text: A method for producing the nanocellulose/surfactant composite according to any one of claims 1 to 4, the method comprising steps of:
mixing the ionic surfactant with a dispersion of the nanocellulose to prepare a liquid mixture, and
drying the liquid mixture.
number: 6
text: A rubber composition, comprising the nanocellulose/surfactant composite according to any one of claims 1 to 4.
Office action: search_report, dated 2020-12-30
Rejection reasons: novelty_epc_54
Prior art cited: ref_id: US4414370A
ref_type: patent
severity: background
ref_id: JPS596207A
ref_type: patent
severity: background
ref_id: JPH0558005B2
ref_type: patent
severity: background
ref_id: JPH01313522A
ref_type: patent
severity: background
ref_id: US5010166A
ref_type: patent
severity: background
ref_id: - "annual research report TREND", vol. 3, 2000, TOAGOSEI CO., LTD., pages: 42 - 45
ref_type: npl
severity: background
ref_id: JP2014141637A
ref_type: patent
severity: background
ref_id: JP2019156868A
ref_type: patent
severity: background
ref_id: CN111074675A
ref_type: patent
severity: background
ref_id: JP2016147996A
ref_type: patent
severity: background
ref_id: JP2014141637
ref_type: patent
severity: background
ref_id: JP2016147996
ref_type: patent
severity: background
ref_id: JP2019156868
ref_type: patent
severity: novelty_destroying
ref_id: CN111074675
ref_type: patent
severity: novelty_destroying
Final disposition: pending (2020-12-30)