申请人:DAICEL CORPORATION
公开号:US10442870B2
公开(公告)日:2019-10-15
Provided is a novel cellulose derivative having excellent water resistance. This is a cellulose acylate oxoalkanoate which is a cellulose derivative corresponding to cellulose, except with substituents replacing part or all of hydrogen atoms in the hydroxy groups of the cellulose. The substituents includes a group represented by General Formula (1) and a group represented by General Formula (2). The cellulose acylate oxoalkanoate has a degree x of substitution with the group represented by General Formula (1), a degree y of substitution with the group represented by General Formula (2), and a degree z of unsubstitution, where x, y, and z meet conditions specified by Expressions (A), (B), and (C):
0.1≤x≤2.99 (A)
0.01≤y≤2.90 (B)
z=3−x−y (C)
本文提供了一种具有优异耐水性的新型纤维素衍生物。这是一种纤维素酰基氧化烷酸酯,它是一种与纤维素相对应的纤维素衍生物,只是用取代基取代了纤维素羟基中的部分或全部氢原子。取代基包括通式(1)代表的基团和通式(2)代表的基团。纤维素酰基氧化烷酸酯与通式(1)所代表的基团的取代度为 x,与通式(2)所代表的基团的取代度为 y,未取代度为 z,其中 x、y 和 z 满足表达式(A)、(B)和(C)规定的条件:
0.1≤x≤2.99 (A)
0.01≤y≤2.90 (B)
z=3-x-y (C)