 Catalysts for the polymerization of olefins |
| We claim: 1. A catalyst-forming component for use in preparing catalysts for the polymerization of ... |
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| Catalyst for polymerizing an olefin and method for producing an olefin polymer |
| We claim: 1. A catalyst for polymerizing an olefin which consists essentially of a product obtained ... |
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| Process for preparing biaxially oriented polypropylene film suitable for twist wrapping |
| It is therefore an object of the instant invention to provide a multilayered, coextruded, highly ... |
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| Process for the production of a biaxially highly oriented polypropylene film |
| The propylene polymer of the base ply (or single ply, if there are no top plies) is preferably ... |
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| Process for making a drag shield for a power mower |
| With the problems of the prior art in mind, the present invention includes two opposing and spaced ... |
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| Process for producing a chloromethylated polymer |
| We claim: 1. A process for producing a chloromethylated polymer by reacting styrene polymer ... |
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| Method of polymerizing vinyl halide with olefin polymers and copolymers and compositions thereof |
| What is claimed is: 1. In a process for the preparation of a vinyl chloride polymer comprising ... |
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| Method of preparing vinyl halide polymers and copolymers with polyolefins |
| OF THE INVENTION AND PREFERRED EMBODIMENTS THEREOF Except for the above-defined improvements of ... |
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Recording liquid, printed product and ink jet recording method
| Details |
Inventors: Hirasa, Takashi; Sasaki, Ken-ichiro; Murayama, Tetsuo;
Assignee: Mitsubishi Chemical Corporation (Tokyo, JP)
Primary Examiner: Klemanski; Helene
Assistant Examiner:
Attorney, Agent or Firm: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
A recording liquid characterized in that when it is printed with 100% duty and with a resolution of 600.times.300 dpi on an electrophotographic paper having a S.A.D (Surface Area Difference) of from 6.0 to 9.0 and a pH of from 6 to 8, the S.A.D. of the printed portion is at least 59.5. |
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DETAILED DESCRIPTION What is claimed is: 1.
A recording liquid comprising: carbon black having a DBP oil absorption of at least 140 ml/100 g and an average particle size of from 0.
01 to 0.
4 .
mu.
m and having a pH value in a range of from 6 to 9; 5 to 15 wt.
% of a dispersant based on said carbon black; and an aqueous medium, wherein the dispersant is a polymeric dispersant.
2.
The recording liquid according to claim 1, wherein the S.
A.
D.
of the printed portion is within a range of from 60.
0 to 90.
0.
3.
The recording liquid according to claim 1, wherein the primary particle size of the carbon black is at most 20 nm.
Description:
The present invention relates to a recording liquid employing an aqueous medium.
Particularly, it relates to a recording liquid for writing or ink jet printing, especially a recording liquid suitable for ink jet printing.
Heretofore, a water-color ink containing an acid dye or a direct dye dissolved in an aqueous medium, or a solvent-type ink containing an oil-soluble dye dissolved in an organic solvent, has been used as a recording liquid for ink jet printing.
The solvent type ink contains a solvent and thus has a problem from the viewpoint of environmental safety, and it is not suitable for use in offices.
On the other hand, the water-color ink containing a water-soluble dye, has a problem that the record will be poor in water resistance, when recording is made on a pulp paper.
The record with the ink also has a poor light resistance.
The same problems are also found in the recording liquid for writing.
To solve such problems, it has been proposed to use an aqueous dispersion ink employing a water-insoluble pigment with excellent water resistance and light resistance as a coloring material.
However, with the conventional aqueous dispersion ink of a water-insoluble pigment, its storage stability and the recording density of the record were inadequate, and it was difficult to satisfy the properties of the record such as improvement of the printing density, prevention of printing irregularities, etc
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Adhesives and Rubbers 
