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Polymeric pigment systems and methods

A technology of polyurethane polymers and pigments, applied in the field of pigment systems, can solve problems such as nozzle clogging, polymers that are not soluble in printing, and difficulties

Inactive Publication Date: 2015-06-10
CABOT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as emulsion polymers, these polymers are not soluble and tend to cause difficulties in printing, especially nozzle clogging

Method used

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  • Polymeric pigment systems and methods
  • Polymeric pigment systems and methods
  • Polymeric pigment systems and methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-

[0090] 1(a) – Manufacture of polyurethane prepolymers

[0091] Fill 93.55g of Polyol 220-056N (polyether polyol having an average molecular weight of 2000 available from Dow Chemical), 9.55 g of dimethylpropionic acid (DMPA) and 19.11 g of NMP. The mixture was stirred with two PTFE stirrers under 1 mm vacuum. Then, the reactor was purged with nitrogen and heated to 100 °C to produce a clear pale yellow solution. The solution was heated under vacuum for 20 minutes using a dry ice-IPA trap (trap). The vessel was then backflushed with dry nitrogen and cooled to 60°C. Slowly add 21.78 g of TDI using a 60 mL plastic syringe at 59°C (available from Bayer's TD-80). The temperature initially dropped to 57°C, followed by a rapid exotherm requiring cooling air to keep the temperature below 70°C. Then, the remaining TDI was added to the mixture where the temperature was raised to about 73°C. Add 8 drops of tin catalyst (dibutyltin dilaurate) and set the temperature to 80°C. Mix...

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Abstract

Compositions for use as inkjet inks and methods of making the compositions are described. The composition includes a pigment and a polymer and the polymer may include polyurethane. The compositions exhibit properties that make them useful in thermal and pressure inkjet applications.

Description

technical field [0001] The present invention relates to pigment systems, and in particular to pigment systems useful as inkjet inks. Background technique [0002] Inkjet ink compositions generally consist of a vehicle that functions as a carrier, and a colorant such as a dye or pigment. Additives and / or co-solvents may also be introduced to adjust the inkjet ink to achieve the desired overall performance properties. [0003] Generally, individual pigments are not easily dispersed in liquid vehicles. Various techniques have been developed to provide stable pigment dispersions that can be used in inkjet printing. For example, a dispersant may be added to the pigment to improve the dispersibility of the pigment in a particular medium. Examples of dispersants include water-soluble polymers and surfactants. Typically, these polymeric dispersants have a molecular weight of less than 20,000 g / mol in order to maintain solubility and thus pigment stability. [0004] Modified pig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/326B41M1/00
CPCC09D11/326B41M1/00C09D11/102
Inventor H.E.克拉克
Owner CABOT CORP
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