Colored minute particles

Details Colored minute particles Colored minute particles

1997-08-05

1999-10-26

Szekely, Peter A.

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...

524458, 524459, 524460, 524461, 524764, 430106, 430109, 430137, 526201, C08F 220, C08F 218, C08L 9304, G03C 900

Patent

active

059730544

ABSTRACT:
A method which produces colored minute particles by suspending in an aqueous suspending medium a polymerizable monomer composition obtained by dispersing a coloring agent at least in a polymerizable monomer and polymerizing the resultant suspension is characterized in that the dispersion of the coloring agent in the polymerizable monomer is performed in the presence of a dispersing agent, the polymerizable monomer composition exhibits a viscosity of not more than 300 cP, and the suspension of the polymerizable monomer composition in the aqueous suspending medium exhibits a viscosity of not more than 100 cP. The dispersing agent is at least one resin selected from the group consisting of rosin derivatives, aromatic petroleum resins, pinene type resins, epoxy type resins, cumdrone resins, and styrene-acryl type resins.

REFERENCES:
patent: 3959153 (1976-05-01), Sadamatsu et al.
patent: 4592990 (1986-06-01), Takagi et al.
Astenal Laboratories, Incorporated v. Nobilium Processing Company of Chicago et al. 115 USPQ44 (DCNILL), Jun. 1957.
Petrolite Corporation v. Watson, Comr Pats. 113 USPQ 248 (DC DC), Mar. 1957 .

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