-
公开(公告)号:US09796849B2
公开(公告)日:2017-10-24
申请号:US14894052
申请日:2014-05-22
Applicant: Celluforce Inc.
Inventor: Richard Berry , Alain Granger
CPC classification number: C08L75/08 , C08G18/4081 , C08G18/4829 , C08G18/4841 , C08G18/6484 , C08G18/7621 , C08G18/7671 , C08G2101/0008 , C08G2101/0066 , C08G2190/00 , C08G2350/00 , C08G2380/00 , C08K2201/011 , C08L1/02
Abstract: A process for preparing polyurethane composites includes (i) providing a dispersion of nanocrystalline cellulose in (a) one or more polyols, (b) one or more isocyanates, or (c) one or more polyols and one or more isocyanate, mixed together; wherein the amount of water in the nanocrystalline cellulose is less than about 1% w/w; (ii) mixing the dispersion of (i)(a) with an isocyanate or (i)(b) with a polyol and a catalyst to allow polymerization; or mixing the dispersion of (i)(c) and a catalyst to allow polymerization; and (iii) isolating the polyurethane composite. A method for improving properties of polyurethanes includes dispersing nanocrystalline cellulose into one or both parts of a two part polyol/isocyanate precursors prior to allowing polymerization of the precursors, wherein the amount of water in the nanocrystalline cellulose is less than about 1% w/w; mixing the dispersion with a catalyst; and polymerizing the precursors to provide the polyurethane.