CN86100089B - Composition of erasable printing ink - Google Patents
Composition of erasable printing ink Download PDFInfo
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- CN86100089B CN86100089B CN86100089A CN86100089A CN86100089B CN 86100089 B CN86100089 B CN 86100089B CN 86100089 A CN86100089 A CN 86100089A CN 86100089 A CN86100089 A CN 86100089A CN 86100089 B CN86100089 B CN 86100089B
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Abstract
The present invention relates to erasable writing ink which is prepared from rubber (or a mixture of rubber and resin), pigment, a lubricating agent, a solvent with a low boiling point and a dispersion medium with a high boiling point, wherein the rubber (or containing resin) is from 10% to 18% of the total weight of the writing ink; the pigment is from 5% to 12% of the total weight of the writing ink; the lubricating agent is from 2% to 10% of the total weight of the writing ink; the weight proportion of the rubber to the solvent with a low boiling point is 0.2 to 0.6: 1; the weight proportion of the dispersion medium with a high boiling point to the pigment is 2 to 4: 1; the lubricating agent is lead stearate; the dispersion medium is neopentyl polyol ester or diisooctyl phthalate or a mixture of the neopentyl polyol ester and the diisooctyl phthalate; and the solvent with a low boiling point is petroleum hydrocarbon with a temperature of 60 to 150 DEG C. The writing ink prepared from the materials can write smoothly, and is suitable for writing, drawing and other applications.
Description
The present invention relates to a kind of composition of erasable printing ink.
The prescription of known preparation erasable printing ink, as introducing in the United States Patent (USP) 4097290: natural rubber is plasticated, make its molecular weight and molecular weight to 40 ten thousand to 750,000, and this rubber is dissolved in the solvent that boiling point is lower than 180 ℃, form the very high liquation of viscosity, and in this solution, add the thickness suspensoid that contains 30～45% pigment and as the dimixo-octyl phthalate of high boiling solvent.
The erasability ball pen ink of introducing in Japan JP-A-5736173 and the JP-A-58208358 number application, its composition comprises rubber, low boiling point solvent, pigment, lubricant and high boiling modulator etc.Owing to selected suitable proportioning for use and made lubricant, improved the writability and the erasability of existing writing ink in the past with metallic soap.Used metallic soap is respectively lithium stearate and aluminum stearate.But lithium stearate is very responsive to the variation of printing ink to manufacture processing condition, and aluminum stearate is an amphoteric substance, forms complexity, causes the manufacturing conditions of printing ink to become harsh and be difficult for obtaining stay-in-grade product.
The objective of the invention is to obtain a kind of have satisfied writability and erasability, denseness is soft, and storage stability is good, and makes easy writing ink.
The composition of printing ink of the present invention comprises rubber (or mixture of rubber and resin), pigment lubrication agent, lower boiling rubber solvent and high boiling point dispersion medium.Wherein, rubber be printing ink total 10～18%; Pigment 5～12%; Lubricant 2～10%; Be preferably 2-6%; Rubber is 0.2～0.6: 1 with the ratio of boiling point solvent weight; High boiling point dispersion medium and pigment weight be 2～4: 1.
Characteristics of the present invention are: the employing lead stearate is a lubricant, boiling point is lower than the hydrocarbon-type oil of 150 ℃ (being 90～120 ℃ well) and makes rubber solvent, and is higher than all very good neopentyl polyol ester of 300 ℃, lubricant nature energy, viscosity temperature characteristic and low-temperature performance or the mixture of neopentyl polyol ester and dimixo-octyl phthalate is a dispersion medium with boiling point.
As previously mentioned, metallic soaps such as employing lithium stearate and aluminum stearate are that the lubricant of writing ink is a technique known, but do not see report on the document as yet with lead stearate, and lead stearate compares to above-mentioned two kinds of metallic soaps as the printing ink lubricant obvious superiority is arranged.This be because: the lead stearate lubricity is better than lithium soap and aluminium soap, and good with other component such as hydro carbons consistency in printing ink, consumption can be bigger, helps increasing the stability of printing ink, thereby improves the storage stability of printing ink.Simultaneously, not harsh because the lead stearate composition is single to the manufacturing conditions requirement of printing ink, make and make easily, the quality product that obtains at last is also more stable.In printing ink of the present invention was formed, the consumption of lead stearate was 2-10%, is preferably 2～6%.Consumption too hour, ink stability reduces; When consumption is too big, unfavorable to writing.
Adopt lead stearate to make lubricant, can not add or add less nonionic surfactant.
Another characteristics of printing ink of the present invention are: the low boilers that adopts boiling point to be lower than 150 ℃ is a rubber solvent.Usually with 60～120 ℃ hydrocarbon-type oil, as industrial naptha, sherwood oil etc.90～120 ℃ sherwood oil preferably.These hydrocarbon-type oils are nontoxic, obtain easily, and cheap, the consumption of its consumption and rubber adapts.In ink formulations of the present invention, rubber and low boiling point solvent weight ratio are 0.2～0.6: 1, and promptly low boiling point solvent accounts for 40～60% of printing ink gross weight.
It is modulator greater than Dormant oils more than 300 ℃ or diester that printing ink in the past adopts boiling point more.And printing ink employing neopentyl polyol ester of the present invention is modulator (being dispersion medium).This is an important feature of printing ink of the present invention.
Neopentyl polyol ester is a kind of good synthetic lubricant, not only lubricity, thermal oxidation stability can be better than Dormant oils and diester, anti-hydrolysis ability also is better than diester, and these performances for the writability of erasable printing ink, stability and even storage stability under wet environment all be very favourable.In addition, because good viscosity temperature characteristic and the low-temperature performance of neopentyl polyol ester, thereby can guarantee that printing ink all has good writing quality and erasable performance in hot summer and severe winter.The available neopentyl polyol ester is trihydroxymethylpropanyl ester, pentaerythritol ester, ditrimethylolpropane ester and bis(pentaerythritolester) etc.The lipid acid of synthetic ester is C
4～C
18Straight chain fatty acid.The viscosity of suitable ester is preferably in 10
-5m
2Below/the S, but greater than 10
-5m
2The polyol ester of/S also can use.The consumption of ester is 15～30% of a printing ink gross weight, and 19～25% is better.
During printing ink of the present invention is formed, the polynary ester of dispersion medium neo-pentyl can use separately, also can mix use with dimixo-octyl phthalate, both can the arbitrary proportion fusion, but its total amount shared ratio in printing ink is identical when using neopentyl polyol ester separately.
When using separately neopentyl polyol ester or using the mixture of two kinds of esters to make dispersion medium, for example lauric acid, tert butyl phenolic resin etc. can not add or add less some other component in the printing ink.
The another kind of scheme that printing ink of the present invention is formed is when adopting lead stearate to make lubricant, the employing dimixo-octyl phthalate is a dispersion medium, other component is identical with first scheme, but will mix tert butyl phenolic resin this moment in the polyisoprene rubber component, otherwise effect is not good enough.The ratio of total amount in the printing ink gross weight of rubber and resin is identical when using rubber separately.Both ratios of self are 1～4: 1.
When adopting neopentyl polyol ester and/or dimixo-octyl phthalate to be dispersion medium, can be lubricant also, but be best with lead stearate with aluminum stearate, lithium stearate, calcium stearate or other metallic soap.
As the rubber of membrane-forming agent, can be natural rubber in printing ink of the present invention is formed, also can be synthetic rubber.Suitable membrane-forming agent is that molecular weight is 40～800,000 the polyisoprene rubber or the mixture of polyisoprene rubber and tert butyl phenolic resin.The content of rubber or rubber and resin is 10～18%, is preferably 13～16%.
The said pigment of printing ink of the present invention can be carbon black, natural graphite, mineral dye such as deep blue.Also can adopt pigment dyestuffs such as azo, anthraquinone.The consumption of pigment is the better below 5～12%, 10% of printing ink gross weight.The granularity of pigment should be less than 5 * 10
-6M.
In the composition of printing ink of the present invention, be pigment if adopt carbon black, with compatibilities such as lead stearate, neopentyl polyol ester or dimixo-octyl phthalate, the polyisoprene rubber mixture of tert butyl phenolic resin (or be added with), sherwood oil, better effects if.
The preparation method of the said printing ink of the present invention is:
At first the mixture with rubber or rubber and resin is dissolved in the low boiling point solvent, makes the heavy-gravity high polymeric solution.
Secondly, pigment and metallic soap are mixed with dispersion medium, heating furnishing pasty state, temperature is 70～100 ℃.Be as cold as room temperature again, place on the three-roller and grind, get the homodisperse thing.
At last, disperse thing to mix high polymeric solution and colloid, promptly make erasable printing ink.
Below be embodiments of the invention, wherein example the 1,2,4, the 5th, most preferred embodiment.
Example 1
Add 18 gram polyisoprene rubbers in 60 milliliters of sherwood oils, heating is fully dissolved rubber, and the control Heating temperature is lost and is advisable to keep the unlikely volatilization of sherwood oil.
With carbon black 10 grams, lead stearate 4 restrains C in addition
4～C
10The trihydroxymethylpropanyl ester 20 gram thorough mixing of mixed fatty acid, heating furnishing pasty state, temperature remains between 70～100 ℃.Be chilled to room temperature then, grind on three-roller, it is uniformly dispersed, last and rubber solutions mixes, and promptly gets the black erasable printing ink.
Following example is implemented by the method identical with example 1.
Example 2
90 milliliters of sherwood oils
Polyisoprene rubber 27 grams
Carbon black 15 grams
Lead stearate 6 grams
Pentaerythritol ester 30 grams
Example 3
Polyisoprene rubber 15 grams
60 milliliters of sherwood oils
Carbon black 7 grams
Lead stearate 4 grams
Dimixo-octyl phthalate 22 grams
Example 4
Polyisoprene rubber 28 grams
Tert butyl phenolic resin 12 grams
140 milliliters of sherwood oils
Carbon black 12 grams
Lead stearate 8 grams
Dimixo-octyl phthalate 40 grams
Example 5
Polyisoprene rubber 28 grams
120 milliliters of sherwood oils
Carbon black 12 grams
Lead stearate 8 grams
Dimixo-octyl phthalate 5 grams
Trihydroxymethylpropanyl ester 35 grams
The ink product of above-mentioned each routine gained is poured in ten garden pearl pen cores, on the general handwriting test machine of country, evaluate, allly do not stop up, do not break, continuous writing one km is above for passing through.And according to writability, erasability and the stability (notes) of prior regulation, mark, the result is as shown in the table:
Claims (10)
1, a kind of erasability printing ink of being made up of rubber, pigment, lubricant, low boiling point solvent, high boiling point dispersion medium is characterized in that:
Lubricant is a lead stearate, and consumption is 2～10% of a total weight;
Pigment is carbon ink, and consumption is 5～12% of a total weight;
Membrane-forming agent is polyisoprene rubber or polyisoprene rubber and tert-butyl phenol aldehyde mixture, and consumption is 10～18% of a total weight;
The high boiling point dispersion medium is the mixture or the dimixo-octyl phthalate of neopentyl polyol ester or neopentyl polyol ester and dimixo-octyl phthalate, and its boiling point is higher than 300 ℃, and consumption is 2～4: 1 with the ratio of pigment;
Low boiling point solvent is a hydrocarbon-type oil, and its boiling point is 60～120 ℃, and consumption is 40～60% of a total weight.
2, according to the described printing ink of claim 1, it is characterized in that neopentyl polyol ester wherein comprises trihydroxymethylpropanyl ester, pentaerythritol ester, its viscosity is preferably in 10
-5m
2Below/the s, consumption is 15～30% of a total weight.
3, according to the described printing ink of claim 1, it is characterized in that wherein neopentyl polyol ester mixes with dimixo-octyl phthalate when using can the arbitrary proportion fusion, and its consumption is 15～30% of a total weight.
4, according to the described printing ink of claim 1, when it is characterized in that being dispersion medium, need in the polyisoprene rubber to add tert butyl phenolic resin with dimixo-octyl phthalate, the two ratio is 1～4: 1, consumption is 10～18% of a total weight.
5, according to the described printing ink of claim 1, the consumption that it is characterized in that lubricant wherein preferably 2～6%, the consumption of neopentyl polyol ester preferably 19～25%, the amount of mixture of polyisoprene rubber or polyisoprene rubber and tert butyl phenolic resin preferably 13～16%, low boiling point solvent is 90～120 ℃ of sherwood oils preferably.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86100089A CN86100089B (en) | 1986-01-09 | 1986-01-09 | Composition of erasable printing ink |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86100089A CN86100089B (en) | 1986-01-09 | 1986-01-09 | Composition of erasable printing ink |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86100089A CN86100089A (en) | 1987-07-22 |
| CN86100089B true CN86100089B (en) | 1988-09-28 |
Family
ID=4800882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86100089A Expired CN86100089B (en) | 1986-01-09 | 1986-01-09 | Composition of erasable printing ink |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86100089B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100580039C (en) * | 2007-09-13 | 2010-01-13 | 山西大学 | Dry-wiping white board marker ink |
| CN107033667A (en) * | 2017-05-04 | 2017-08-11 | 胡永辉 | A kind of erasable ball pen ink of oiliness |
| JP6974263B2 (en) * | 2018-06-29 | 2021-12-01 | 株式会社パイロットコーポレーション | Ballpoint pen |
| WO2020065429A1 (en) * | 2018-09-24 | 2020-04-02 | Flooring Industries Limited, Sarl | Ceramic ink for inkjet digital printing |
-
1986
- 1986-01-09 CN CN86100089A patent/CN86100089B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN86100089A (en) | 1987-07-22 |
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