STABILITÄTSVERBESSERUNGEN VON DISPERSIONEN AMORPHER TEILCHEN
摘要
An object of the invention is to overcome disadvantages of prior practices. A further object of the invention is to provide a process for providing particles that result in improved UV absorption in photographic products. An additional object is to provide lower cost polymer particle dispersions. The invention is generally accomplished by mechanically grinding a crystalline material to a desired particle size in a liquid that is not a solvent for the material, heating said crystalline particles dispersed in said liquid to above their melting temperature, and cooling the melted particles in said liquid to form amorphous particles. In preferred forms of the invention, the material is a photographically useful material, such as ultraviolet light absorber or coupler.
申请公布号
DE69122232(T2)
申请公布日期
1997.01.30
申请号
DE1991622232T
申请日期
1991.12.06
申请人
EASTMAN KODAK CO., ROCHESTER, N.Y., US
发明人
CZEKAI, DAVID, ALAN, HONEOYE FALLS, NY 14472, US;BISHOP, JOHN, FRANCIS, ROCHESTER, NY 14625, US