Vinyltoluene and styrene copolymers as resins for liquid electrostatic toners
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United States of America Patent
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May 28, 1991
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N/A
app pub date -
Jul 5, 1989
filing date -
Jul 5, 1989
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Abstract
A liquid electrostatic developer comprising: (a) a non-polar liquid having a kauributanol value of less than 30; (b) thermoplastic resin particles comprised of a mixture of (1) a polyethylene homopolymer or a copolymer of (i) polyethylene and (ii) acrylic acid, methacrylic acid or the alkyl esters thereof, wherein (ii) comprises 0.1-20 weight percent of said copolymer and (2) a random copolymer of (iii) selected from the group consisting of vinyltoluene and styrene and (iv) selected from the group consisting of butadiene and acrylate, wherein said thermoplastic resin particles are dispersed in said non-polar liquid form; and (c) an ionic or zwitterionic charge director compound which is soluble in said non-polar liquid.
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