CS256475B1 - Writing colored liquid in writing instruments - Google Patents

Abstract

Writing ink fluid based on 0.05 to 30.00 parts by weight of dye, 5.00 to 30.00 parts by weight of monoethylene glycol and/or diethylene glycol and/or triethylene glycol and/or glycerin, the remainder up to 100.00 parts being distilled and/or deionized water containing by weight, based on the weight of the fluid as oil, 0.001 to 0.50 parts by weight of sodium and/or potassium and/or ammonium dialkyl sulfosuccinate with a number of carbon atoms in the alkyl from 8 to 18

Description

The invention provides a writing colored fluid for writing instruments called markers or markers.

The writing fluids known so far are made up of a solution of dyes in a solvent consisting of a mixture of distilled or deionized water with alcohols, especially with polyhydric alcohols, especially with ethylene glycol, diethylene glycol, triethylene glycol, propylene glycols and/or with glycerin, or various mixtures of these substances are used. Writing fluids also contain surface-active substances, which are used to reduce their surface tension. The use of oxyethylated nonylphenols is widespread, a mixture of sodium alkyl sulfate with sodium dodecylbenzene sulfonate and with alkyl polyglycol ether is also used, and surfactants based on ammonium alkyl sulfate, sodium alkyl sulfate and substances based on triethanolamine salt of linear sodium dodecylbenzene sulfonate are also used.

A disadvantage of the writing fluids known to date is that the surfactants used to date do not provide a sufficient reduction in surface tension and perfect wetting of the fiber reservoirs of the writing fluids and the writing tips of markers and markers is not achieved. This results in problems in the production of writing instruments and in their use.

The above disadvantages are eliminated by the writing fluid according to the invention.

258,475

The essence of the invention lies in the fact that the writing fluid consists of 0.05 to 30.00 parts by weight of a dye, 5.00 to 30.00 parts of monoethylene glycol and/or diethylene glycol and/or triethylene glycol and/or glycerin, the remainder up to 100.00 parts being distilled and/or deionized water and a wetting agent, and the writing fluid further contains by weight, based on the weight of the fluid as a whole, 0.001 to 0.50 parts by weight of sodium and/or potassium and/or ammonium dialkyl sulfosuccinate with a number of carbon atoms in the alkyl chain of 8 to 18 or a mixture thereof.

As for the dye, it is possible to use practically any natural or synthetic dye, the guide in its choice is primarily the resulting color shade and solubility in the specified solvent. In particular, the use of azo dyes, diarylmethane and triarylmethane dyes and xanthene dyes has proven to be effective. In the case of requirements for lightfastness of the resulting font, the use of pigments has proven to be effective, preferably in the form of their aqueous pastes.

The writing fluid according to the invention brings a number of advantages. Perfect wettability of the fiber reservoirs of writing fluids and writing tips is achieved, thereby achieving productive production of markers and markers and ensuring their reliable function.

The invention is illustrated in more detail by the following examples of its embodiments. Parts are always by weight, unless otherwise stated.

Example_i - red dog's fluid

xanthene dye - 3.00 parts bis - /2-ethylhexyl/sulfo- sodium succinate - 0.05 parts diethylene glycol - 20.00 parts water - 76.95 parts

256,475

- 3 PÉÍ^lad_2 - purple writing fluid triphenylmethane dye bis /2-octyldecyl/ potassium sulfosuccinate •triethylene glycol water

2,000 parts

0.001 parts 35,000 parts 62,999 parts

Add "yellow writing fluid"

azo dye - 4.00 parts bis /2-hexyldecyl/ sulfo- ammonium succinate - 0.50 parts glycerin - 10.00 parts ethylene glycol - 10.00 parts water - 75.50 parts

Exemplary - green writing fluid

triphenylmethane dye - 3.50 parts bis /2-dodecyl/ sulfo- sodium succinate - .0.25 parts monopropylene glycol - 20.00 parts diethylene glycol - 10.00 parts water - 66.25 parts

Example_5 - black writing fluid

azo dye - 8.00 parts bis /2-hexyldecyl/ sulfo- potassium sulfite - 0.40 parts ethylene glycol - 15.00 parts diethylene glycol - 15.00 parts water - 61.60 parts

OBJECT OF THE FINDING

Claims (1)

SUBJECT OF THE INVENTION 256 475 Writing ink color based on 0.05 to 30.00 parts by weight of dye, 5.00 to 30.00 parts of monoethylene glycol and / or diethylene glycol and / or triethylene glycol and / or glycerine, the remainder up to 100.00 parts being distilled and / or deionized water and a surfactant, characterized in that it comprises by weight _(based on the weight of the fluid as a whole _of 0.001 to 0.50 parts of sodium dialkyl sulfosuccinates, and / or potassium and / or ammonium with the number of carbon atoms in the alkyl lu 8 to 18