Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1998-08-26
2000-10-24
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C08K 318
Patent
active
061369071
ABSTRACT:
There are provided a finely dispersed material of a functional compound such as pigment or the like in the state of its inherent average particle diameter and a process for producing a finely dispersed material of a functional compound into a binder resin, in which the compound is dispersed in the state of its inherent average particle diameter not more than 3 microns, in spite of using the functional compound having an apparently large average particle diameter by agglomeration in comparison with the inherent average particle diameter of the compound, wherein when the above compound before dispersion is apparently in the dry state, de-ionized water is added thereto to form a hydrous paste of the compound and then this hydrous paste is contacted with a substance having an ion-exchange function selected depending upon the properties of the impurity ions contained in the above functional compound in a mixed solvent composed of de-ionized water and an organic solvent miscible with water to remove the impurity ions, and the impurity ion-free hydrous paste thus obtained is thereafter dispersed in the binder resin, or when the above compound before dispersion is already in the form of a hydrous paste, this hydrous paste is directly contacted with the selected substance having ion-exchange function by the same method described in the case of the dry state, and the impurity ion-free hydrous paste thus obtained is thereafter dispersed in the binder resin.
REFERENCES:
patent: 4381349 (1983-04-01), Lee
patent: 4668719 (1987-05-01), Kato
patent: 4764539 (1988-08-01), Ladang
patent: 5529871 (1996-06-01), Ichimura et al.
Randolph, Jeffrey, K., CDR Pigments & Dispersion, "European Ink Maker", Polymers Paint Color Journal, Apr. 27, 1994, vol. 184, No. 4348, pp. S4-S5 .
Moriyama Takeo
Shingae Kiyoshi
Sunamori Takashi
Suzuki Shigekazu
Takiguchi Fujio
Michl Paul R.
Taisei Chemical Industries, Ltd.
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