Surface-hydrophobicized cellulose nanofibers for oily thickener, oily thickener composition containing same, cosmetics and hydrophobicized cellulose nanofiber complex for oily thickener containing same, oily thickener composition containing same, and cosmetics containing same
AssigneeChuetsu Pulp & Paper Co., Ltd
InventorsTsubasa Tsuji, Takashi Nogita
Life of this patent
Estimating the term…
Abstract
An oil thickener including surface-hydrophobicized CNFs which are cellulose nanofibers having an average thickness of 3 to 200 nm and an average length of 0.1 μm or larger, and a 1 wt. % aqueous dispersion of which has a viscosity of 700 to 2100 mPa·s, and hydroxyl groups in cellobiose units of which are esterified with vinyl esters and/or organic acid esters in a substitution degree of 0.2 to 0.8.
Claims19
An oil thickener, comprising:
- surface-hydrophobicized cellulose nanofibers (CNFs),
- wherein the CNFs prior to being surface hydrophobicized have an average thickness of 3 to 200 nm and an average length of 0.1 μm or larger,
- wherein a 1 wt. % aqueous dispersion of the CNFs prior to being surface hydrophobicized have a viscosity of 700 to 2100 mPa·s measured at 25° C. using a B-type viscometer and a rotor No. M3 or M4 at a rotation speed of 12 rpm, and
- wherein hydroxyl groups in cellobiose units of the surface-hydrophobicized CNFs are esterified with vinyl esters and/or organic acid esters in a substitution degree of 0.2 to 0.8.
An oil thickener, comprising:
- surface-hydrophobicized cellulose nanofibers (CNFs),
- wherein the CNFs prior to being surface hydrophobicized have an average thickness of 3 to 200 nm and an average length of 0.1 μm or larger,
- wherein a 1 wt. % aqueous dispersion of the CNFs prior to being surface hydrophobicized have a viscosity of 300 to 10000 mPa·s measured at 25° C. using a B-type viscometer and a rotor No. M3 or M4 at a rotation speed of 12 rpm, and
- wherein hydroxyl groups in cellobiose units of the surface-hydrophobicized CNFs are esterified with vinyl esters and/or organic acid esters in a substitution degree of 0.2 to 0.8.
A hydrophobicized CNF complex, comprising:
- cellulose nanofibers (CNFs) which, prior to being surface hydrophobicized, have an average thickness of 3 to 200 nm and an average length of 0.1 μm or larger,
- wherein a 1 wt. % aqueous dispersion of the CNFs prior to being surface hydrophobicized have a viscosity of 300 to 10000 mPa·s measured at 25° C. using a B-type viscometer and a rotor No. M3 or M4 at a rotation speed of 12 rpm,
- wherein hydroxyl groups in cellobiose units of the surface-hydrophobicized CNFs are esterified with vinyl esters and/or organic acid vinyl esters, and the esterified CNFs are cross-linked together via a polyhydric alcohol and/or a polyalkylene glycol to form a complex, and/or the CNFs are bonded to part of the esterified CNFs to form a complex.
A hydrophobicized CNF complex obtained in a process comprising such steps that water-containing CNFs having an average thickness of 3 to 200 nm, which are obtained in such a manner that pulp having α-cellulose content of 60 to 99 wt. % is used as a polysaccharide, and a 0.5 to 10 wt. % aqueous mixture of the polysaccharide is jetted from a plurality of positions under a high pressure of 50 to 400 MPa to cause the plurality of jets to collide with each other to effect fibrillation, are added into an organic solvent together with potassium carbonate, and a polyhydric alcohol and/or a polyalkylene glycol, a cross-linking agent and a vinyl ester and/or an organic acid vinyl ester are added thereto, and the resulting mixture is allowed to react, and reaction product thus obtained is collected.
A hydrophobicized CNF complex for an oil thickener obtained in a process comprising such steps that water-containing CNFs having an average thickness of 3 to 200 nm, which are obtained in such a manner that pulp having α-cellulose content of 60 to 99 wt. % is used as a polysaccharide, and a 0.5 to 10 wt. % aqueous mixture of the polysaccharide is jetted from a plurality of positions under a high pressure of 50 to 400 MPa to cause the plurality of jets to collide with each other to effect fibrillation, are added into an organic solvent together with potassium carbonate, and a polyhydric alcohol and/or a polyalkylene glycol, a cross-linking agent and a vinyl ester and/or an organic acid vinyl ester are added thereto, and the resulting mixture is allowed to react, and reaction product thus obtained is collected.
Dependencies are inferred from the claim text.