Photosetting ferrofluid compositions

Details Photosetting ferrofluid compositions Photosetting ferrofluid compositions

1988-03-25

1990-08-07

Russel, Jeffrey E.

Compositions

Magnetic

Flaw detection or magnetic clutch

252 6254, G01N 2784

Patent

active

049466135

ABSTRACT:
Photosetting ferrofluid compositions of this type comprises three manners of structural feature.
A first type of the compositions to solve the problems mentioned above is a photosetting type ferrofluid which is prepared by admixing photosetting resin with ferrofluid in which ferromagnetic particles having adsorbed a surfactant(s) are dispersed into a carrier.
An improved photosetting type ferrofluid is also proposed as a second type of composition, in which the carrier itself is composed of at least a photosetting resin.
A further improved photosetting type ferrofluid having higher sensitivity than that of the second embodiment is also prepared as a type of composition, with an intention to obtain higher sharp microphotograph image, and this sensitive photosetting type ferrofluid is prepared by admixing a ferrofluid, consisting of a carrier of low viscosity, ferromagnetic particles, a surfactant or surfactants for dispersing the ferromagnetic particles in said carrier and further added with photosetting resin at least 25% by volume of the carrier.

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