Thermosensitive friction decoloration solid ink

Abstract

The thermosensitive friction decoloration solid ink is prepared from the following raw materials in parts by weight: 20 to 60 parts of thermosensitive friction microcapsule decoloration color paste, 10 to 50 parts of framework, 0 to 10 parts of filler, 5 to 30 parts of humectant, 0 to 10 parts of adhesive, 0.005 to 0.1 part of preservative and 0.005 to 0.1 part of antioxidant, the thermosensitive friction microcapsule decoloration color paste is prepared from a pigment leuco body, a color developing agent and a temperature control agent through an interfacial polymerization method. Through the combination of the skeleton and the thermosensitive friction microcapsule decoloration color paste, the obtained solid ink does not fade after being stored for a long time, and has a thermosensitive friction decoloration function.

Description

Technical Field

[0001] The invention belongs to the technical field of solid ink, and in particular relates to a heat-sensitive friction-erasable solid ink. Background Art

[0002] A new type of product developed for the market where there are only heat-sensitive friction-erasable gel pen inks and fountain pen inks, but no heat-sensitive friction-erasable solid inks.

[0003] Traditional solid inks on the market, such as crayons and color sticks, do not have the thermal friction erasability function. When consumers use traditional solid inks, if they make a mistake or graffiti is misplaced, there is no way to completely remove the color and they have to start over.

[0004] Chinese Patent No. 201510365354.0 discloses a "reversible thermochromic solid ink composition," comprising the following components: 5-15 parts by weight of a reversible thermochromic microcapsule pigment; 30-95 parts by weight of a long-chain fatty soap with a melting point between 45°C and 300°C, serving as a carrier for the reversible thermochromic microcapsule pigment; 1-10 parts by weight of a water-soluble organic solvent as a humectant; and 1-10 parts by weight of an alkali-soluble comb-shaped organic polymer as a flexibility modifier. This reversible thermochromic solid ink composition, particularly when formulated into a recording pen, can be used for writing, marking, and coloring. Because it is reversible, it is easier to modify without leaving a trace, compared to traditional solid pens.

[0005] Chinese patent 202111547904.2 discloses a kind of microcapsule pigment particles specially used for thermosensitive erasable fountain pen ink and a preparation method thereof. The average particle size D50 of the microcapsule pigment particles is 0.22-0.25 μm. The microcapsule pigment particles are made of the following raw materials in parts by weight: 100-300 parts of methyl vinyl ether / maleic acid copolymer, 20-100 parts of sodium hydroxide, 10-50 parts of crystal violet lactone, 10-100 parts of bisphenol AF, 300-800 parts of 4-benzyloxyphenylethyl caprate, 80-200 parts of formaldehyde, 80-200 parts of melamine, 5-10 parts of EDTA, 1150-3300 parts of deionized water, and appropriate amounts of sulfuric acid and triethanolamine. The microcapsule pigment particles are small in size and concentrated in distribution, which can meet the special requirements of fountain pen ink for pigment particle size. The fountain pen ink produced using this special microcapsule pigment particles has good anti-stratification performance and smooth writing. It uses the principle of heat generated by eraser friction to eliminate color without affecting secondary writing.

[0006] Although there are already erasable liquid inks in the prior art, research has found that a problem in the process of preparing liquid inks into solid inks is that the solid inks will naturally fade after writing and cannot meet writing requirements. Summary of the Invention

[0007] The purpose of the present invention is to provide a heat-sensitive friction-erasable solid ink, which can be kept for a long time without fading. The place written with the solid ink can be rubbed by a special friction piece (similar to an eraser) to eliminate the writing traces.

[0008] To achieve the above object, the technical solution of the present invention is: A heat-sensitive friction-erasable solid ink, comprising the following raw materials in parts by weight: 20-60 parts of heat-sensitive friction microcapsule-erasable color paste, 10-50 parts of a skeleton, 0-10 parts of a filler, 5-30 parts of a moisturizing agent, 0-10 parts of a binder, 0.005-0.1 parts of a preservative, and 0.005-0.1 parts of an antioxidant; The skeleton is one or more of behenic acid, arachidic acid, stearic acid, palmitic acid, myristic acid, lauric acid, capric acid, sodium behenate, potassium behenate, sodium arachidate, sodium stearate, potassium stearate, sodium palmitate, sodium myristate, sodium laurate, sodium caprate, fatty acid ester, methyl stearate, ethyl stearate, methyl palmitate, methyl myristate, methyl laurate, and methyl caprate; The heat-sensitive friction microcapsule decolorizing paste is prepared from a leuco pigment, a developer and a temperature control agent through an interfacial polymerization method.

[0009] Preferably, the pigment leuco body includes 7-[4-(diethylamino)-2-ethoxyphenyl]-7-(2-methyl-1-octyl-1H-indol-3-yl)furo[3,4-b]pyridin-5(7H)-one; 6-dimethylamino-3,3-bis(4-dimethylaminophenyl)phthalide; tris(4-methylaminophenyl)methane; 3-[4-(diethylamino)phenyl]-3-(1-ethyl-2-methyl-1H-indol-3-yl)-1(3H)-isobenzofuranone; 4-(4-diethylamino-2-ethyl 2-(1,2-Dimethyl-3-indolyl)-3-[4-diethylamino-2-methylphenyl]phthalide; 2-(2-(2-4-dimethylamino)-3-methyl-6-diethylaminofluoran; 3-anilino-3-methyl-6-dibutylaminofluoran; 2-anilino-3-methyl-6-diethylaminofluoran; 3,3-bis(N-octyl-2-methylindole)phthalide; N,N-dimethyl-4-[2- [2-(Octyloxy)phenyl]-6-phenyl-4-pyridyl]-aniline; 6'-(diethylamino)-1',3'-dimethylfluoran; 6'-(diethylamino)-3-oxo-spiro[isobenzofuran-1(3H); 9'-[9H]xanthen-2'-carboxylic acid ethyl ester; 6-[ethyl(4-methylphenyl)amino]-2-methyl-spiro[isobenzofuran-1(3H),9-(9H)xanthen]-3-one; 3-diethylamino-6-methyl-7-chlorofluoran; 3,3-bis(4-diethylamino-2-ethoxyphenyl)-4-azaphthalide; 2'-(dibenzylamino)-6'-(diethylamino)fluoran; 9-(diethylamino)spiro[12H-benzo[A]xanthen-12,1'(3'H)] -isobenzofuran]-3'-one; 3-(4-dimethylaminophenyl)-3-(1-butyl-2-methyl-indol-3-yl)-6-dimethylaminophthalide; 4-N-isopentyl-N-ethylamino-6-methyl-7-phenylaminofluoran; 3,6-dimethoxyfluoran; 4,4'-[(9-butyl-9-hydro-carbazole-3-)methylene]bis[N-methyl-N-phenyl]aniline; 4-N-isopentyl-N-ethylamino-6-methyl-7-phenylaminofluoran; 10-[ethyl(3-methylbutyl)amino]-spiro[12H-benzo[a]xanthene-12,1'(3'H)-isobenzofuran]-3; one of 4-N-isopentyl-N-ethylamino-6-methyl-7-phenylaminofluoran.

[0010] Preferably, the developer is an inorganic acid, an aromatic carboxylic acid and its anhydride or its metal salt, an organic sulfonic acid, an organic acid and a phenolic compound.

[0011] Preferably, the developer is 4,4'-(2-ethylhexylene)bisphenol, 2,2-bis-(4-hydroxy-3-methylphenyl)propane, 2,2-bis-(4-hydroxy-3-methylphenyl)propane, 4-hexyl-1,3-dihydroxybenzene, 4,4'-(hexafluoroisopropylidene)diphenol, 4,4'-(1-phenylethylidene)bisphenol, 2,2'-dihydroxybiphenyl, 4,4'-octylenebisphenol, 4,4'-hexylenebisphenol, 4,4'-(1-methyl-heptylene)bisphenol, 4,4'-(1,2-dimethylbutylene)bisphenol, 4,4'-(1,5-dimethylhexylene)bisphenol, 4 , 4'-(l-ethyl-3-methylpentylene)bisphenol, 4,4'-(l-methyl-4-methylheptylene)bisphenol, 4,4'-(1-ethyl-hexylene)-bisphenol, 4,4'-(1-ethyl-pentylene)bisphenol and 4,4'-(1-ethyl-octylene)bisphenol, α,α,α'-tris(4-hydroxyphenyl)-1-ethyl-4-isopropylbenzene, 4-hydroxy-4'-isopropoxydiphenyl sulfone, tert-butylphenol, pentylphenol, octylphenol, cumylphenol, salicylic acid, zinc salicylate, zinc salicylate polymer, zinc salicylate polymer metal salt, phenolic resin, phenolic resin metal salt, acidic white clay or one or more.

[0012] Preferably, the temperature control agent is one or more of lauryl alcohol, tetradecanol, hexadecanol, stearyl alcohol, eicosyl alcohol, behenyl alcohol, lauramide, stearamide, benzyloxyphenethyl laurate, benzyloxyphenethyl decanoate, benzyloxyphenethyl octanoate, ethyl acetate, butyl acetate, methyl stearate, ethyl stearate, isopropyl stearate, methyl palmitate, ethyl palmitate, isopropyl palmitate, methyl myristate, ethyl myristate, isopropyl myristate, methyl laurate, ethyl laurate, and isopropyl laurate.

[0013] Preferably, the filler is one or more of kaolin, calcium carbonate, and silicon dioxide.

[0014] Preferably, the moisturizing agent is one or more of ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, glycerol, butylene glycol, monoethanolamine, diethanolamine, triethanolamine, thioethylene glycol, and polyethylene glycol.

[0015] Preferably, the binder is a water-soluble cellulose derivative, preferably one or more of carboxymethyl cellulose, methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl methyl cellulose, and hydroxypropyl methyl cellulose.

[0016] Preferably, the preservative is IPBC and / or Brobul.

[0017] Preferably, the antioxidant is antioxidant 1010 and / or BHT.

[0018] By selecting a suitable skeleton raw material and combining it with a heat-sensitive friction-erasable microcapsule color paste prepared by interfacial polymerization, the present invention produces a water-washable, heat-sensitive friction-erasable solid ink. This new solid ink, produced using a heat-sensitive friction-erasable color paste, can be rubbed with a dedicated friction piece (similar to an eraser) over the area where corrections are needed. This heats up the area, erasing the writing in the area in question. This allows the corrected writing to be rewritten in the area, eliminating the need for restarting the process and reducing the inconvenience for consumers.

[0019] The solid ink of the present invention can use some special raw materials to make it have super water-washing function. When the solid ink is written on interior and exterior walls, clothes, bed sheets, desktops and other places containing latex paint, the writing can be easily wiped (washed) off with a wet cloth (wet wipes) or with water.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention utilizes a novel solid ink made from a special skeleton material and a heat-sensitive friction microcapsule decolorizing paste prepared by interfacial polymerization. This solid ink allows the area to be rubbed with a special friction element (similar to an eraser) where corrections are needed. This heats up the area, erasing the writing in the desired area. This eliminates the need to rewrite the corrected area, eliminating the need to start over and reducing the inconvenience for consumers. Conventional solid inks, however, lack decolorization.

[0021] 2. Since children are the primary users of solid ink, this invention utilizes water-based colorants, water-based additives, and water-based auxiliaries, making this water-based solid ink highly washable. Writing on latex-painted interior and exterior walls, clothing, bed sheets, tabletops, and other surfaces can be easily wiped off with a damp cloth (wet wipes) or water. This solid ink does not use organic solvents, and its raw materials avoid those containing formaldehyde or those that generate formaldehyde during use and storage. This truly formaldehyde-free product reduces the harmful effects of formaldehyde on the human body and is particularly suitable for children. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the embodiments.

[0023] Example 1 Heat-sensitive friction microcapsule decolorizing paste: Mix the colorless dye 6-dimethylamino-3,3-bis(4-dimethylaminophenyl)phthalide, the color developer 4,4'-(hexafluoroisopropylidene)diphenol, and the temperature control agent benzyloxyphenylethanol laurate evenly, heat and melt, mix evenly, add to a system consisting of water, emulsifier, and surfactant, emulsify into fine particles with a high-shear emulsifier, cure at high temperature, and prepare microcapsule paste by interfacial polymerization. This paste turns blue after freezing; 10 parts of stearic acid, 20 parts of sodium palmitate, 10 parts of water, 20 parts of ethylene glycol, 2 parts of calcium carbonate, 3 parts of hydroxyethyl cellulose, 0.02 parts of preservatives, and 0.02 parts of antioxidants are heated, melted, and stirred evenly. The mixture is added to 35 parts of the above-prepared heat-sensitive friction microcapsule decolorizing paste, heated, stirred, and mixed evenly. The mixture is poured into a specific mold, cooled and formed, and then frozen. The pen displays blue. The mixture is then loaded into the pen accessories to form a blue water-based formaldehyde-free heat-sensitive friction decolorizing solid ink.

[0024] Example 2 Heat-sensitive friction microcapsule decolorizing paste: Mix the colorless dye 2-phenylamino-3-methyl-6-dibutylaminofluoran, the color developer 4-hydroxy-4'-isopropoxydiphenyl sulfone, and the temperature control agent benzyloxyphenylethanol decanoate evenly, heat and melt, mix evenly, add to a system consisting of water, emulsifier, and surfactant, emulsify into fine particles with a high-shear emulsifier, cure at high temperature, and prepare microcapsule paste by interfacial polymerization. This paste appears black after freezing; 25 parts of sodium stearate, 5 parts of myristic acid, 14 parts of water, 20 parts of propylene glycol, 2 parts of calcium carbonate, 4 parts of hydroxyethyl cellulose, 0.02 parts of preservatives, and 0.02 parts of antioxidants are heated, melted, and stirred evenly. The mixture is added to 30 parts of the above-mentioned heat-sensitive friction microcapsule decolorizing paste, heated, stirred, and mixed evenly. The mixture is poured into a specific mold, cooled and formed, and then frozen. The pen displays black. The mixture is then loaded into the pen accessories to form a black water-based formaldehyde-free heat-sensitive friction decolorizing solid ink.

[0025] Example 3 Heat-sensitive friction microcapsule decolorizing paste: The colorless dye 2-phenylamino-3-methyl-6-dibutylaminofluoran, the color developer 4-hydroxy-4'-isopropoxydiphenyl sulfone, and the temperature control agent benzyloxyphenylethanol decanoate are uniformly mixed, heated to melt, and mixed uniformly. The mixture is then added to a system consisting of water, an emulsifier, and a surfactant. The mixture is emulsified into fine particles using a high-shear emulsifier, cured at high temperature, and prepared into a microcapsule paste using an interfacial polymerization method. The paste appears black after freezing (same as in Example 2); 25 parts of sodium stearate, 5 parts of myristic acid, 10 parts of water, 15 parts of propylene glycol, 2 parts of calcium carbonate, 3 parts of hydroxyethyl cellulose, 0.02 parts of preservatives, 0.02 parts of antioxidants, heat and melt and stir evenly, add them to 40 parts of the above-mentioned heat-sensitive friction microcapsule decolorizing paste, heat and stir and mix evenly, pour into a specific mold, cool and shape, and then freeze. The pen will show black, and it is loaded into the pen accessories to form a black water-based formaldehyde-free heat-sensitive friction decolorizing solid ink. Comparative Example 1 Heat-sensitive friction microcapsule decolorizing paste: a colorless dye 6-dimethylamino-3,3-bis(4-dimethylaminophenyl)phthalide, a color developer 4,4'-(hexafluoroisopropylidene)diphenol, and a temperature control agent benzyloxyphenethyl laurate are mixed in a certain ratio, heated to melt, and mixed evenly. The mixture is then added to a system consisting of water, an emulsifier, and a surfactant. The mixture is emulsified into fine particles using a high-shear emulsifier, cured at high temperature, and prepared into a microcapsule paste using an in-situ polymerization method. The paste turns blue after freezing (same as in Example 1). 25 parts sodium stearate, 5 parts myristic acid, 14 parts water, 20 parts propylene glycol, 2 parts calcium carbonate, 4 parts hydroxyethyl cellulose, 0.02 part preservative, 0.02 part antioxidant, heated, melted, and stirred until uniform. 30 parts of the microcapsule color paste prepared by the in-situ method in Comparative Example 1 were heated, stirred, and mixed until uniform. The mixture was poured into a specific mold, cooled, formed, and then frozen. The pen displayed black color and was then loaded into the pen accessories to form a black water-based, heat-sensitive, friction-erasable solid ink.

[0026] Comparative Example 2 Heat-sensitive friction microcapsule decolorizing paste: 2-phenylamino-3-methyl-6-dibutylaminofluoran, a color developer 4-hydroxy-4'-isopropoxydiphenyl sulfone, and a temperature control agent benzyloxyphenylethanol decanoate are mixed in a certain ratio, heated to melt, and mixed evenly. The mixture is then added to a system consisting of water, an emulsifier, and a surfactant. The mixture is emulsified into fine particles using a high-shear emulsifier, cured at high temperature, and prepared into a microcapsule paste using an interfacial polymerization method. The paste appears black after freezing (same as in Example 2). 25 parts of sodium stearate, 5 parts of soap base, 14 parts of water, 20 parts of propylene glycol, 2 parts of calcium carbonate, 4 parts of hydroxyethyl cellulose, 0.02 parts of preservative, 0.02 parts of antioxidant, heat and melt and stir evenly, add to 30 parts of the above-mentioned heat-sensitive friction microcapsule decolorizing paste, heat and stir and mix evenly, pour into a specific mold, cool and shape, and then freeze. The pen will show black, and it is loaded into the pen accessories to form a black water-based heat-sensitive friction decolorizing solid ink. Comparative Example 3 25 parts sodium palmitate, 5 parts myristic acid, 14 parts water, 20 parts propylene glycol, 2 parts calcium carbonate, 4 parts hydroxyethyl cellulose, 0.01 part preservative, 0.02 part antioxidant, heat and melt, stir evenly, add 30 parts of commercially available ordinary color paste (HostafineBlack T 30), heat and stir and mix evenly. Pour into a specific mold, cool and shape, and then freeze. The pen will appear black. Put it into the pen accessories to form a black water-based solid ink. The raw materials used in the solid ink of the embodiment of the present invention are shown in Table 1.

[0027] The raw materials and preparation methods of the heat-sensitive friction microcapsule decolorizing paste used in the present invention and comparative example 1 are shown in Table 2. The heat-sensitive friction microcapsule decolorizing paste of the present invention is prepared by interfacial polymerization using a leuco pigment, a developer, and a temperature control agent.

[0028] Color: Visual inspection Frozen color restoration: Store in a freezer at -25 degrees for 24 hours, take out, and place at room temperature for 24 hours. Visually observe the color change Superior washability: Five "★"s were painted on a wall with a latex roller. A week later, the wall was gently wiped clean with a damp paper towel without damaging the latex paint. This was rated "Good." The wall had slight visible marks, rated "Fair." The wall had deep, clearly visible "★" patterns, rated "Poor."

[0029] Formaldehyde: Detected using GB / T32606-2016 "Determination of free formaldehyde in stationery products - Acetylacetone spectrophotometry".

[0030] The performance of the products of the embodiments of the present invention and the comparative examples are shown in Table 3.

[0031] The difference between Comparative Example 1 and Example 1 of the present invention is that the heat-sensitive friction microcapsule decolorizing paste is prepared by an in-situ polymerization method, and the obtained solid ink gradually fades after long-term storage.

[0032] The difference between Comparative Example 2 and Example 2 of the present invention is that the skeletons used are soap base and sodium stearate, the selected skeleton materials are inappropriate, and the color of the obtained solid ink gradually fades after long-term storage.

[0033] The difference between Comparative Example 3 and Example 2 of the present invention is that a commercially available common black color paste is used. The solid ink obtained cannot be removed by washing or rubbing.

[0034] Table 1 Unit: parts by weight Table 2 Table 3

Claims

1. A thermally sensitive friction-erasable solid ink, characterized in that: The invention comprises the following raw materials in parts by weight: 20-60 parts of heat-sensitive friction microcapsule decolorizing paste, 10-50 parts of skeleton, 0-10 parts of filler, 5-30 parts of moisturizing agent, 0-10 parts of adhesive, 0.005-0.1 parts of preservative and 0.005-0.1 parts of antioxidant; The skeleton is one or more of behenic acid, arachidic acid, stearic acid, palmitic acid, myristic acid, lauric acid, capric acid, sodium behenate, potassium behenate, sodium arachidate, sodium stearate, potassium stearate, sodium palmitate, sodium myristate, sodium laurate, sodium caprate, fatty acid ester, methyl stearate, ethyl stearate, methyl palmitate, methyl myristate, methyl laurate, and methyl caprate; The heat-sensitive friction microcapsule decolorizing paste is prepared from a leuco pigment, a developer and a temperature control agent through an interfacial polymerization method.

2. The heat-sensitive friction-erasable solid ink according to claim 1, wherein: The pigment leuco body includes 7-[4-(diethylamino)-2-ethoxyphenyl]-7-(2-methyl-1-octyl-1H-indol-3-yl)furo[3,4-b]pyridin-5(7H)-one; 6-dimethylamino-3,3-bis(4-dimethylaminophenyl)phthalide; tris(4-methylaminophenyl)methane; 3-[4-(diethylamino)phenyl]-3-(1-ethyl-2-methyl-1H-indol-3-yl)-1(3H)-isobenzofuranone; 4-(4-diethylamino-2-ethoxyphenyl) phenyl)-3-(1-ethyl-2-methylindol-3-yl)-4-aza-2-benzo[C]furanone; 3-(1,2-dimethyl-3-indolyl)-3-[4-diethylamino-2-methylphenyl]phthalide; 2-(2-4-dimethylamino)-3-methyl-6-diethylaminofluoran; 3-phenylamino-3-methyl-6-dibutylaminofluoran; 2-phenylamino-3-methyl-6-diethylaminofluoran; 3,3-bis(N-octyl-2-methylindolyl)phthalide; N,N-dimethyl-4-[2- [2-(Octyloxy)phenyl]-6-phenyl-4-pyridyl]-aniline; 6'-(diethylamino)-1',3'-dimethylfluoran; 6'-(diethylamino)-3-oxo-spiro[isobenzofuran-1(3H); 9'-[9H]xanthen-2'-carboxylic acid ethyl ester; 6-[ethyl(4-methylphenyl)amino]-2-methyl-spiro[isobenzofuran-1(3H),9-(9H)xanthen]-3-one; 3-diethylamino-6-methyl-7-chlorofluoran; 3,3-bis(4-diethylamino-2-ethoxyphenyl)-4-azaphthalide; 2'-(dibenzylamino)-6'-(diethylamino)fluoran; 9-(diethylamino)spiro[12H-benzo[A]xanthen-12,1'(3'H)] -isobenzofuran]-3'-one; 3-(4-dimethylaminophenyl)-3-(1-butyl-2-methyl-indol-3-yl)-6-dimethylaminophthalide; 4-N-isopentyl-N-ethylamino-6-methyl-7-phenylaminofluoran; 3,6-dimethoxyfluoran; 4,4'-[(9-butyl-9-hydro-carbazole-3-)methylene]bis[N-methyl-N-phenyl]aniline; 4-N-isopentyl-N-ethylamino-6-methyl-7-phenylaminofluoran; 10-[ethyl(3-methylbutyl)amino]-spiro[12H-benzo[a]xanthene-12,1'(3'H)-isobenzofuran]-3; one of 4-N-isopentyl-N-ethylamino-6-methyl-7-phenylaminofluoran.

3. The heat-sensitive friction-erasable solid ink according to claim 1, wherein: The developer is one or more of inorganic acid, aromatic carboxylic acid and its anhydride or metal salt thereof, organic sulfonic acid, organic acid and phenolic compound.

4. The heat-sensitive friction-erasable solid ink according to claim 1 or 3, characterized in that: The color developer is 4,4'-(2-ethylhexylene)bisphenol, 2,2-bis-(4-hydroxy-3-methylphenyl)propane, 2,2-bis-(4-hydroxy-3-methylphenyl)propane, 4-hexyl-1,3-dihydroxybenzene, 4,4'-(hexafluoroisopropylidene)diphenol, 4,4'-(1-phenylethylidene)bisphenol, 2,2'-dihydroxybiphenyl, 4,4'-octylenebisphenol, 4,4'-hexylenebisphenol, 4,4'-(1-methyl-heptylene)bisphenol, 4,4'-(1,2-dimethylbutylene)bisphenol, 4,4'-(1,5-dimethylhexylene)bisphenol, 4,4'-(l-ethyl-3-methylpentylene)bisphenol, 4,4 One or more of '-(l-methyl-4-methylheptylene)bisphenol, 4,4'-(1-ethyl-hexylene)bisphenol, 4,4'-(1-ethyl-pentylene)bisphenol and 4,4'-(1-ethyl-octylene)bisphenol, α,α,α'-tris(4-hydroxyphenyl)-1-ethyl-4-isopropylbenzene, 4-hydroxy-4'-isopropoxydiphenyl sulfone, tert-butylphenol, amylphenol, octylphenol, cumylphenol, salicylic acid, zinc salicylate, zinc salicylate polymer, zinc salicylate polymer metal salt, phenolic resin, phenolic resin metal salt, and acidic clay.

5. The heat-sensitive friction-erasable solid ink according to claim 1, wherein: The temperature control agent is one or more of lauryl alcohol, tetradecanol, hexadecanol, stearyl alcohol, eicosyl alcohol, behenyl alcohol, lauramide, stearamide, benzyloxyphenethyl laurate, benzyloxyphenethyl decanoate, benzyloxyphenethyl octanoate, ethyl acetate, butyl acetate, methyl stearate, ethyl stearate, isopropyl stearate, methyl palmitate, ethyl palmitate, isopropyl palmitate, methyl myristate, ethyl myristate, isopropyl myristate, methyl laurate, ethyl laurate, and isopropyl laurate.

6. The heat-sensitive friction-erasable solid ink according to claim 1, wherein: The filler is one or more of kaolin, calcium carbonate and silicon dioxide.

7. The heat-sensitive friction-erasable solid ink according to claim 1, wherein: The moisturizing agent is one or more of ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, glycerol, butylene glycol, monoethanolamine, diethanolamine, triethanolamine, thioethylene glycol, and polyethylene glycol.

8. The heat-sensitive friction-erasable solid ink according to claim 1, wherein: The binder is a water-soluble cellulose derivative, preferably one or more of carboxymethyl cellulose, methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl methyl cellulose, and hydroxypropyl methyl cellulose.

9. The heat-sensitive friction-erasable solid ink according to claim 1, wherein: The preservatives are IPBC and / or Brombul.

10. The heat-sensitive friction-erasable solid ink according to claim 1, wherein: The antioxidant is antioxidant 1010 and / or BHT.

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