Nanocellulose/surfactant composite
AssigneeSumitomo Rubber Industries, Ltd.
InventorsSumiko Miyazaki, Daisuke Sato
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Abstract
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.
Claims8
A method for producing a rubber composition, comprising a nanocellulose/surfactant composite, and at least one rubber selected from the group consisting of isoprene-based rubber, polybutadiene rubber and styrene-butadiene rubber,
- wherein the nanocellulose/surfactant composite comprises a nanocellulose and a surfactant, and has a moisture content of lower than 10%, and wherein the surfactant comprises an ionic surfactant having a weight average molecular weight of 3000 or more,
- the method comprising:
- a first step of mixing the ionic surfactant with a dispersion of the nanocellulose to prepare a liquid mixture;
- a second step of drying the liquid mixture to prepare a dried nanocellulose/surfactant composite;
- a third step of redispersing in water the dried nanocellulose/surfactant composite obtained in the second step to form a redispersion, and mixing the redispersion with a latex of the at least one rubber to prepare a compounded latex;
- and
- a fourth step of coagulating the compounded latex to form the rubber composition.
Dependencies are inferred from the claim text.