| abstract |
The present invention provides a crystalline acetonitrile solvate of 6,6' - [ [3,3',5,5' -tetra-tert-butyl- [1,1' -biphenyl ] -2,2' -diyl ] bis (oxy) ] bisdibenzo [ d, f ] [1,3,2] -dioxaphosphepin having an X-ray powder diffraction pattern with a diffraction peak at 2 Θ, said 2 Θ being selected from at least five of the following: 7.36 +/-0.20 degrees, 7.69 +/-0.20 degrees, 10.08 +/-0.20 degrees, 10.56 +/-0.20 degrees, 11.36 +/-0.20 degrees, 12.40 +/-0.20 degrees, 15.98 +/-0.20 degrees, 18.56 +/-0.20 degrees, 18.84 +/-0.20 degrees and 20.41 +/-0.20 degrees. Compared with an amorphous compound, the compound has the advantages of periodically and repeatedly arranged internal molecules in a three-dimensional space, long-range order, regular crystal structure, easier dispersion, low viscosity and difficult agglomeration, and is very suitable for industrial production and application. |