Vinyltoluene and styrene copolymers as resins for liquid electrostatic toners
AssigneeDX Imaging
InventorThomas C. Felder
Life of this patent
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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.
Claims17
A liquid electrostatic developer consisting essentially of:
- (a) a non-polar liquid having a kauri-butanol value of less than 30;
- (b) thermoplastic resin particles comprising a mixture of (1) a polyethylene homopolymer or a copolymer of (i) ethylene and (ii) acrylic acid, methacrylic acid or the alkyl esters thereof, wherein (ii) comprises about 0.1-20 weight percent of said copolymer and (2) a random copolymer of (iii) a monomer selected from the group consisting of vinyltoluene and styrene and (iv) a monomer selected from the group consisting of butadiene and acrylate, wherein said thermoplastic resin particles are dispersed in said non-polar liquid;
- and
- (c) an ionic or zwitterionic charge director compound which is soluble in said non-polar liquid.
A liquid electrostatic developer comprising:
- (a) a non-polar liquid having a kauri-butanol value of less than 30;
- (b) thermoplastic resin particles comprising a mixture of (1) a polyethylene-methacrylic acid copolymer, wherein the methacrylic acid comprises about 0.1-20 weight percent of said copolymer and (2) a random copolymer of vinyltoluene and acrylate, wherein said thermoplastic resin particles are dispersed in said non-polar liquid;
- and
- (c) an ionic or zwitterionic charge director compound which is soluble in said non-polar liquid.
A liquid electrostatic developer comprising:
- (a) a non-polar liquid having a kauri-butanol value of less than 30;
- (b) thermoplastic resin particles comprising a mixture of (1) a polyethylene homopolymer or a copolymer of (i) ethylene and (ii) acrylic acid, methacrylic acid or the alkyl esters thereof, wherein (ii) comprises about 0.1-20 weight percent of said copolymer and (2) a random copolymer of vinyltoluene and acrylate wherein said thermoplastic resin particles are dispersed in said non-polar liquid;
- and
- (c) an ionic or zwitterionic charge director compound which is soluble in said non-polar liquid.
Dependencies are inferred from the claim text.