Multi-color thermosensitive chromogenic material

Abstract

Disclosed in the present invention is a multi-color thermosensitive chromogenic material, comprising: a base material layer used for being coated with a thermosensitive coloring agent, wherein the base material layer is coated with a thermosensitive coloring layer after being subjected to a curing treatment; and the thermosensitive coloring layer, which comprises at least one thermosensitive coupler and a thermosensitive color-developing agent. The thermosensitive coupler comprises a low-temperature thermosensitive chromogenic coupler and / or a high-temperature thermosensitive chromogenic coupler. On the basis of the color matching principle, at least one thermosensitive coupler is used, and the color of the at least one thermosensitive coupler is displayed during thermosensitive printing; and thermosensitive couplers with different colors can also be used in combination, thereby producing chromogenic materials with different colors by using the limited thermosensitive couplers. At least one thermosensitive coupler is made into a polymer composite material or is wrapped inside a capsule made of a polymer material, such that heat is effectively isolated during thermosensitive printing, and color development requires higher temperatures. By means of the combined use of low-temperature and high-temperature thermosensitive chromogenic couplers, the chromogenic temperature of a printer is controlled during thermosensitive printing so as to produce two-color or multi-color prints.

Description

A multi-color thermosensitive color-emitting material Technical Field

[0001] This invention relates to a thermosensitive color-generating material, and more particularly to a multicolor thermosensitive color-generating material. Background Technology

[0002] Currently, thermal printing is widely used in many industries due to its ease of use.

[0003] Thermosensitive colorants are special compounds. Unlike traditional dyes, thermosensitive colorants themselves are colorless. They are coated or distributed onto various base materials, such as paper, plastic film, metal film, textiles, solvents, and other media. Under the influence of heat, pressure, and additives, they react chemically with thermosensitive color developers to generate colored compounds, thus achieving the purpose of color development. They are used in the production of thermal paper, pressure-sensitive paper, and color-changing coatings, and are widely used in labels, fax machines, tickets, documents, writing instruments, and other fields.

[0004] Thermosensitive color developers are another type of compound that reacts chemically with thermosensitive color-forming agents under heating conditions to produce compounds of different colors. The thermosensitive color developer itself does not affect the color of the color-forming compound.

[0005] Existing thermosensitive color-developing materials involve grinding colorants, developers, and sensitizers into fine particles and coating them onto the surface of paper or PP film. When heated by a thermal printer, the color develops. Because the colorants and developers have similar structures and their chemical reaction temperatures are not significantly different, they can usually only display a single color. If two-color thermal paper is required, pre-printing or post-printing methods must be used, which is very inconvenient.

[0006] In the prior art, CN115491924B discloses a dual-color thermal material technology. This technology synthesizes a composite material of a colorant and an organic polymer material, which provides limited heat insulation and raises the color development temperature. Thus, under the action of a thermal printer, thermal heads at different temperatures can display different colors. However, this technology uses a single colorant, and is affected by the difficulty and variety of colorant synthesis. Dark colors are used to cover light colors, especially black to cover red and yellow, resulting in unclear color distinction and limited color range, which cannot meet the personalized color needs of users.

[0007] Therefore, there is a particular need for a multi-color thermal printing material that can print all the colors required by the user, in order to solve the aforementioned existing problems. Summary of the Invention

[0008] The purpose of this invention is to provide a multi-color thermosensitive colorant material. In view of the shortcomings of the prior art, this invention uses the principle of color matching to mix one or more colorants, and prints out the desired different colors of thermosensitive material during thermosensitive printing.

[0009] The technical problem solved by this invention can be achieved by the following technical solutions:

[0010] A multi-color thermosensitive color-emitting material, comprising:

[0011] A substrate layer for coating a heat-sensitive dyeing agent, wherein a heat-sensitive dyeing layer that has undergone curing is coated on the substrate layer; the heat-sensitive dyeing agent includes at least one heat-sensitive colorant and a heat-sensitive color developer.

[0012] The thermosensitive colorant includes a low-temperature color-developing thermosensitive colorant and / or a high-temperature color-developing thermosensitive colorant;

[0013] The coating of the high-temperature color-developing thermosensitive colorant involves mixing and dispersing one or more thermosensitive colorants with thermosensitive sensitizers, dispersants, antioxidants, or ultraviolet absorbers in an aqueous solution, organic solvent, or polymer monomer, and then adding a polymer crosslinking agent to undergo a crosslinking reaction to obtain a polymer composite material or microcapsules with a particle size of 0.1-20.0 micrometers for coating.

[0014] The coating of the low-temperature color-developing thermosensitive colorant involves grinding a mixture of the thermosensitive colorant and dispersant into particles with a particle size of 0.05-20 micrometers using a ball mill, then adding a thermosensitive sensitizer, dispersant, antioxidant, or UV absorber, and reacting under stirring to obtain a polymer composite material with a particle size of 0.1-20 micrometers for coating. The thermosensitive colorant can be one or more types. When it is a single colorant, the color developed is the original color of the colorant. When several colorants are mixed, according to the color matching principle, the color developed is a mixture of the colors of all the colorants.

[0015] The mass ratio of the amount of the thermosensitive color developer to the amount of the thermosensitive color-forming agent used is 0.3-3.0:1;

[0016] The mass ratio of the amount of the polymer monomer or polymer compound used to the amount of the thermosensitive colorant used is 0.3-5.0:1;

[0017] The thermal colorant displays different colors based on different temperatures within an energy range of 50-300 degrees Celsius. When the printing temperature is within the low-temperature colorant coloring range, it displays a single color or a mixed color depending on the type of low-temperature colorant used. When the printing temperature is within the high-temperature colorant coloring range, it displays a mixed color of all the colorants used.

[0018] In a preferred embodiment of the present invention, the substrate layer is any one or more of the following materials: paper, BOPP material, PET material, PVC material, LDPE material, PA material, PP material, aluminized film, silver-plated PET material, silver-plated PE material, wash label, leather, cotton, chemical fiber cloth, polyester or acrylic fiber.

[0019] In a preferred embodiment of the present invention, the thermosensitive colorimetric agent is any one or a combination of commonly used thermosensitive colorimetric agents such as bisphenol A, bisphenol S, 3,3-diallylbisphenol S, 3-propoxybisphenol S, 2,4-benzenesulfonylphenol, and N-p-toluenesulfonyl-N'-3-(p-toluenesulfonyloxy)phenylurea.

[0020] In a preferred embodiment of the present invention, the polymer monomer or polymer compound includes any one or more combinations of acrylates, melamine, polyacrylates, isocyanates, polycarbonates, polyurethanes, phenolic resins, styrene-butadiene latex, styrene-acrylic rubber, modified starch, dextrin, or PVA. Diisocyanate compounds, such as TDI, MDI, HMDI, IPDI, and HDI, are preferred.

[0021] In a preferred embodiment of the present invention, the solvent includes: low-boiling-point organic solvents such as acetone and ethyl acetate, and high-temperature solvent oils such as diarylethane.

[0022] In a preferred embodiment of the present invention, the thermosensitive colorant comprises: blue crystal violet lactone, 4-4'-[(9-butyl-9-hydro-carbazole-3-)methylene]bis[N-methyl-N-phenyl]aniline or 7-(4-(diethylamino)-2-(ethoxy)phenyl)-7-(N-ethyl-2-methyl-indolyl)pyridinofuranone;

[0023] The following are black-colored: 3-diethylamino-6-methyl-7-phenylaminofluorane, 3-dibutylamino-6-methyl-7-phenylaminofluorane, 3-(N-ethyl-4-tolylamino)-6-methyl-7-phenylaminofluorane, 3-(N-ethyl-isopentanamino)-6-methyl-7-phenylaminofluorane, or 3-diethylamino-6-methyl-2,4-dimethylphenylaminofluorane;

[0024] The following are red-colored 3,3-bis(1-octyl-2-methylindole-3-yl)phthalide, 3,3-bis(1-butyl-2-methylindole-3-yl)phthalide, 3,3-bis(1-ethyl-2-methylindole-3-yl)phthalide, 3-diethylamino-7-methoxyfluorane, 3-diethylamino-7,8-benzofluorane, 3-(N-ethyl-N-tolylamino)-7-methoxyfluorane, or 3-diethylamino-6-methyl-7-chlorofluorane;

[0025] 3-Diethylamino-7-(diphenylmethylamino)fluorane or 3-diethylamino-7-(2-chlorophenylamino)fluorane, which are green in color;

[0026] 3-(4-dimethylaminophenyl)-3-(1-butyl-2-methyl-indole-3-yl)-6-dimethylaminophthalide, which appears purple;

[0027] Orange-colored 3-diethylamino-6,8-dimethylfluorane, 1,3-dimethyl-6-diethylaminofluorane, 3-diethylamino-7-ethoxycarboxyfluorane, or 3-dibutylamino-7-ethoxycarboxyfluorane; and

[0028] Any one or more combinations of yellow N,N-dimethyl-4-(2-(2-(octyloxy)phenyl)-6-phenylpyridin-4-yl)aniline and N,N-dimethyl-4-(2-(2-(butoxy)phenyl)-6-phenylpyridin-4-yl)aniline.

[0029] In a preferred embodiment of the present invention, the thermosensitive sensitizer includes any one or more combinations of 2-benzyloxynaphthalene, 1,2-diphenoxyethane, or 1,2-bis(3-methylphenoxy)ethane.

[0030] In a preferred embodiment of the present invention, the polymer crosslinking agent includes any one or more combinations of glyoxal, malondialdehyde, benzaldehyde, or aziridine.

[0031] In a preferred embodiment of the present invention, the antioxidant includes any one or more combinations of BHA, CA, p-tert-butylphenol or 2,4-di-tert-butylphenol.

[0032] In a preferred embodiment of the present invention, the ultraviolet absorber includes any one or a combination of benzophenone-based ultraviolet absorbers, benzotriazole-based ultraviolet absorbers, and triazine-based ultraviolet absorbers.

[0033] In a preferred embodiment of the present invention, the dispersant includes any one or more combinations of PVA, modified PVA, styrene-acrylic emulsion, styrene-butadiene emulsion, acrylic emulsion, or polyurethane emulsion.

[0034] The multi-color thermosensitive color-emitting material of the present invention, compared with the prior art, uses at least one thermosensitive colorant based on the color matching principle. During thermosensitive printing, the color of at least one thermosensitive colorant is displayed, thereby producing color-emitting materials of different colors using a limited number of thermosensitive colorants. The at least one thermosensitive colorant is made into a polymer composite material, which effectively isolates heat during thermosensitive printing. Higher temperatures are required for color emission. The combined use of low-temperature and high-temperature thermosensitive colorants allows for control of the printer's color emission temperature during thermosensitive printing to print two-color or multi-color materials, thus achieving the purpose of the present invention.

[0035] The features of the present invention can be clearly understood by referring to the following detailed description of preferred embodiments. Detailed Implementation

[0036] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific examples.

[0037] The multicolor thermosensitive color-developing material of the present invention includes: a substrate layer for coating a thermosensitive dyeing agent, wherein a thermosensitive dyeing layer after coating and curing treatment is applied to the substrate layer; the thermosensitive dyeing layer includes at least one thermosensitive colorant and a thermosensitive color developer; the thermosensitive colorant includes a low-temperature color-developing thermosensitive colorant and / or a high-temperature color-developing thermosensitive colorant.

[0038] Preparation of low-temperature color-developing thermosensitive colorant coating solution:

[0039] Blue low-temperature thermosensitive colorant: 20g crystal violet lactone, 20g 10% PVA solution, 40g water, mixed evenly, then ground with a ball mill to below Φ0.8μm, and 10g 30% styrene-butadiene emulsion is added to prepare a blue low-temperature thermosensitive colorant emulsion.

[0040] A red low-temperature thermosensitive colorant: 20g of 3-diethylamino-7,8-benzofluorane, 20g of 10% PVA solution, and 40g of water are mixed evenly and then ground with a ball mill to a diameter of less than 0.8μm. 10g of 30% styrene-butadiene emulsion is added to prepare a red low-temperature thermosensitive colorant emulsion.

[0041] A green low-temperature thermosensitive colorant: 20g of 3-diethylamino-7-(diphenylmethylamino)fluorane, 20g of 10% PVA solution, and 40g of water are mixed evenly and then ground with a ball mill to a diameter of less than 0.8μm. 10g of 30% styrene-butadiene emulsion is added to prepare a green low-temperature thermosensitive colorant emulsion.

[0042] Orange-colored low-temperature thermosensitive colorant: 20g of 6-diethylamino-2-ethoxyacrylfluorane, 20g of 10% PVA solution, and 40g of water are mixed evenly and then ground with a ball mill to a diameter of less than 0.8μm. 10g of 30% styrene-butadiene emulsion is added to prepare an orange-colored low-temperature thermosensitive colorant emulsion.

[0043] A yellow low-temperature thermosensitive colorant: 20g of N,N-dimethyl-4-(2-(2-(octyloxy)phenyl)-6-phenylpyridin-4-yl)aniline, 20g of 10% PVA solution, and 40g of water are mixed evenly and then ground with a ball mill to a diameter of less than 0.8μm. 10g of 30% styrene-butadiene emulsion is added to prepare a yellow low-temperature thermosensitive colorant emulsion.

[0044] Preparation of high-temperature color-developing thermosensitive colorant coating solution:

[0045] Blue high-temperature thermosensitive colorant: 20g crystal violet lactone, 3g UVP, 1g BHA, 30g isophorone diisocyanate, heated to 100℃ to dissolve, added to a mixed solution of 20g 10% PVA solution and 40g water under high-speed stirring, emulsified for 30 minutes after addition, 1g glyoxal was added, reacted at 100℃ for 6 hours, cooled to room temperature, to prepare a blue high-temperature thermosensitive colorant emulsion with a particle size of less than 1μm;

[0046] A black high-temperature thermosensitive colorant: 20g of 3-dibutylamino-6-methyl-7-phenylaminofluorane, 3g of UVP, and 1g of BHA were added to 30g of isophorone diisocyanate and heated to 100℃ to dissolve. The solution was then added to a mixed solution of 20g of 10% PVA solution and 40g of water under high-speed stirring. After emulsification for 30 minutes, 1g of glyoxal was added and the mixture was reacted at 100℃ for 6 hours. The mixture was then cooled to room temperature to prepare a black high-temperature thermosensitive colorant emulsion with a particle size of less than 1μm.

[0047] A red high-temperature thermosensitive colorant: 20g of 3-diethylamino-7-methoxyfluorane, 3g of UVP, and 1g of BHA are added to 30g of isophorone diisocyanate and heated to 100℃ to dissolve. Under high-speed stirring, the mixture is added to a mixed solution of 20g of 10% PVA solution and 40g of water. After emulsification for 30 minutes, 1g of glyoxal is added, and the mixture is reacted at 100℃ for 6 hours. After cooling to room temperature, a red high-temperature thermosensitive colorant emulsion with a particle size of less than 1μm is prepared.

[0048] A green high-temperature thermosensitive colorant: 20g of 3-diethylamino-7-(diphenylmethylamino)fluorane, 3g of UVP, and 1g of BHA were added to 30g of isophorone diisocyanate and heated to 100℃ to dissolve. The solution was then added to a mixed solution of 20g of 10% PVA solution and 40g of water under high-speed stirring. After emulsification for 30 minutes, 1g of glyoxal was added and the mixture was reacted at 100℃ for 6 hours. The mixture was then cooled to room temperature to prepare a green high-temperature thermosensitive colorant emulsion with a particle size of less than 1μm.

[0049] A purple-colored high-temperature thermosensitive colorant: 20g of 3-(4-dimethylaminophenyl)-3-(1-butyl-2-methyl-indole-3-yl)-6-dimethylaminophthalide, 3g of UVP, and 1g of BHA were added to 30g of isophorone diisocyanate and heated to 100℃ to dissolve. The solution was then added to a mixed solution of 20g of 10% PVA solution and 40g of water under high-speed stirring. After emulsification for 30 minutes, 1g of glyoxal was added and the mixture was reacted at 100℃ for 6 hours. The mixture was then cooled to room temperature to prepare a purple-colored high-temperature thermosensitive colorant emulsion with a particle size of less than 1μm.

[0050] Orange-colored high-temperature thermosensitive colorant: 20g of 6-diethylamino-2-ethoxyfluorane, 3g of UVP, and 1g of BHA were added to 30g of isophorone diisocyanate and heated to 100℃ to dissolve. The solution was then added to a mixture of 20g of 10% PVA solution and 40g of water under high-speed stirring. After emulsification for 30 minutes, 1g of glyoxal was added and the mixture was reacted at 100℃ for 6 hours. The mixture was then cooled to room temperature to prepare an orange-colored high-temperature thermosensitive colorant microcapsule emulsion with a particle size of less than 1μm.

[0051] A yellow, high-temperature thermosensitive colorant: 20g of N,N-dimethyl-4-(2-(2-(octyloxy)phenyl)-6-phenylpyridin-4-yl)aniline, 3g of UVP, and 1g of BHA were added to 30g of isophorone diisocyanate and heated to 100℃ to dissolve. The solution was then added to a mixture of 20g of 10% PVA solution and 40g of water under high-speed stirring. After emulsification for 30 minutes, 1g of glyoxal was added, and the mixture was reacted at 100℃ for 6 hours. The mixture was then cooled to room temperature to prepare a yellow, high-temperature thermosensitive colorant emulsion with a particle size of less than 1μm.

[0052] Mixed high-temperature thermosensitive colorant: 20g of 3-dibutylamino-6-methyl-7-phenylaminofluorane, 2g of 3-diethylamino-7-(diphenylmethylamino)fluorane, 3g of UVP, 1g of BHA were added to 20g of diarylethane solvent oil and 30g of isophorone, heated to 100℃ to dissolve, and added to a mixed solution of 20g of 10% PVA solution and 40g of water under high-speed stirring. After adding, emulsify for 30 minutes, add 1g of glyoxal, react at 100℃ for 6 hours, cool to room temperature, and a black high-temperature thermosensitive colorant emulsion with a particle size of less than 1μm was prepared.

[0053] Thermosensitive color developer coating emulsion:

[0054] Mix 10g of bisphenol S, 30g of 10% PVA solution, and 30g of water evenly, and grind them to a diameter of less than 1μm using a ball mill to prepare a thermosensitive colorimetric emulsion.

[0055] By combining the color development of low-temperature and high-temperature thermosensitive colorants, a third type of thermosensitive color material can be achieved.

[0056] A composite material consisting of a low-temperature thermosensitive colorant that appears blue and a high-temperature thermosensitive colorant that appears green and red can be printed in blue and black.

[0057] A composite material consisting of a low-temperature thermosensitive colorant that appears orange and a high-temperature thermosensitive colorant that appears green can be used to print orange and black dual colors.

[0058] A composite material consisting of a low-temperature thermosensitive colorant that appears red and a high-temperature thermosensitive colorant that appears green and purple can be used to print red and black dual colors.

[0059] A composite material consisting of a low-temperature thermosensitive colorant that appears yellow and a high-temperature thermosensitive colorant that appears green and purple can be used to print yellow and black dual colors.

[0060] A composite material consisting of a low-temperature thermosensitive colorant that appears green and a high-temperature thermosensitive colorant that appears red and orange can be printed in green and black.

[0061] A composite material of a low-temperature yellow thermosensitive colorant and a high-temperature thermosensitive colorant that produces blue can be printed in yellow and green.

[0062] A composite material of a low-temperature red thermosensitive colorant and a high-temperature thermosensitive colorant that produces blue can be printed in red and purple.

[0063] A composite material of a low-temperature blue thermosensitive colorant and a high-temperature thermosensitive colorant that produces orange color can be printed in both blue and black.

[0064] A low-temperature thermosensitive colorant that displays orange color, combined with a high-temperature thermosensitive colorant composite material, can be printed to produce orange and black dual-color printing.

[0065] Example 1

[0066] 30g of a low-temperature thermosensitive colorant that produces a blue color, 40g of a high-temperature thermosensitive colorant that produces an orange color, 60g of a thermosensitive color developer, and 40g of 30% styrene-butadiene emulsion are mixed evenly at a concentration of 6g / m³. 2 When the solid content is coated onto thermal paper and printed with a thermal printer, a two-color process with low-temperature blue and high-temperature black can be obtained.

[0067] Example 2

[0068] Mix 30g of a red-colored low-temperature thermosensitive colorant, 50g of a green-colored high-temperature thermosensitive colorant, 60g of a thermosensitive color developer, and 40g of 30% styrene-butadiene emulsion evenly at a concentration of 6g / m³. 2 When the solid content is coated onto thermal paper and printed with a thermal printer, a two-color process with low-temperature red and high-temperature black can be obtained.

[0069] Example 3

[0070] 30g of a green low-temperature thermosensitive colorant, 50g of a blue high-temperature thermosensitive colorant, 60g of a thermosensitive color developer, and 40g of 30% styrene-butadiene emulsion are mixed evenly at a concentration of 6g / m³. 2 When the solid content is coated onto thermal paper and printed with a thermal printer, a two-color process of low-temperature green and high-temperature black can be obtained.

[0071] Example 4

[0072] 30g of a low-temperature thermosensitive colorant that produces an orange color, 50g of a high-temperature thermosensitive colorant that produces a purple color, 60g of a thermosensitive color developer, and 40g of 30% styrene-butadiene emulsion are mixed evenly at a concentration of 6g / m³. 2When the solid content is coated onto thermal paper and printed with a thermal printer, a two-color process can be obtained: low-temperature yellow and high-temperature black.

[0073] Example 5

[0074] 30g of a low-temperature thermosensitive colorant that produces an orange color, 50g of a high-temperature thermosensitive colorant that produces a blue color, 60g of a thermosensitive color developer, and 40g of 30% styrene-butadiene emulsion are mixed evenly at a concentration of 6g / m³. 2 When the solid content is coated onto thermal paper and printed with a thermal printer, a two-color process with low-temperature orange and high-temperature black can be obtained.

[0075] Example 6

[0076] Mix 30g of a yellow low-temperature thermosensitive colorant, 50g of a red high-temperature thermosensitive colorant, 60g of a thermosensitive color developer, and 40g of 30% styrene-butadiene emulsion evenly at a concentration of 6g / m³. 2 When the solid content is coated onto thermal paper and printed with a thermal printer, a two-color result can be obtained: yellow at low temperatures and orange at high temperatures.

[0077] Example 7

[0078] 30g of a green low-temperature thermosensitive colorant, 30g of a blue high-temperature thermosensitive colorant, 10g of a black high-temperature thermosensitive colorant, 60g of a thermosensitive color developer, and 40g of 30% styrene-butadiene emulsion are mixed evenly at a concentration of 6g / m³. 2 When the solid content is coated onto thermal paper and printed with a thermal printer, a two-color process of low-temperature green and high-temperature black can be obtained.

[0079] Example 8

[0080] 30g of a blue low-temperature thermosensitive colorant, 2g of a red low-temperature thermosensitive colorant, 3g of a green high-temperature thermosensitive colorant, 20g of a black high-temperature thermosensitive colorant, 60g of a thermosensitive color developer, and 40g of 30% styrene-butadiene emulsion are mixed evenly at a concentration of 6g / m³. 2 When the solid content is coated onto thermal paper and printed with a thermal printer, a dual-color effect of low-temperature sapphire blue and high-temperature black can be obtained.

[0081] Example 9

[0082] 30g of a low-temperature thermosensitive colorant that produces an orange color, 50g of a high-temperature thermosensitive colorant, 60g of a thermosensitive color developer, and 40g of 30% styrene-butadiene emulsion are mixed evenly at a concentration of 6g / m³. 2 When the solid content is coated onto thermal paper and printed with a thermal printer, a two-color process with low-temperature orange and high-temperature black can be obtained.

[0083] Example 10

[0084] Mix 30g of a red low-temperature thermosensitive colorant, 50g of a blue high-temperature thermosensitive colorant, 60g of a thermosensitive color developer, and 40g of 30% styrene-butadiene emulsion evenly at a concentration of 6g / m³.2 When the solid content is coated onto thermal paper and printed with a thermal printer, a two-color process of low-temperature red and high-temperature purple can be obtained.

[0085] Example 11

[0086] Mix 30g of a yellow low-temperature thermosensitive colorant, 50g of a blue high-temperature thermosensitive colorant, 60g of a thermosensitive color developer, and 40g of 30% styrene-butadiene emulsion evenly at a concentration of 6g / m³. 2 When the solid content is coated onto thermal paper and printed with a thermal printer, a two-color result of low-temperature yellow and high-temperature green can be obtained.

[0087] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as defined by the appended claims and their equivalents.

Claims

1. A multicolor thermosensitive color-emitting material, characterized in that, include: A substrate layer for coating a heat-sensitive dyeing agent, wherein a heat-sensitive dyeing layer is coated on the substrate layer after curing treatment; the heat-sensitive dyeing layer includes at least one heat-sensitive colorant and a heat-sensitive color developer. The thermosensitive colorant includes a low-temperature color-developing thermosensitive colorant and / or a high-temperature color-developing thermosensitive colorant; The coating of the high-temperature color-developing thermosensitive colorant involves mixing and dispersing one or more thermosensitive colorants with thermosensitive sensitizers, dispersants, antioxidants, or ultraviolet absorbers in an aqueous solution, organic solvent, or polymer monomer, and then adding a polymer crosslinking agent to undergo a crosslinking reaction to obtain a polymer composite material or microcapsules with a particle size of 0.1-20.0 micrometers for coating. The coating of the low-temperature color-developing thermosensitive colorant involves grinding a mixture of thermosensitive colorant and dispersant into particles with a particle size of 0.05-20 micrometers using a ball mill, then adding a thermosensitive sensitizer, dispersant, antioxidant, or UV absorber, and reacting under stirring to obtain a polymer composite material with a particle size of 0.1-20 micrometers for coating. The mass ratio of the amount of the thermosensitive color developer to the amount of the thermosensitive color-forming agent used is 0.3-3.0:1; The mass ratio of the amount of the polymer monomer or polymer compound used to the amount of the thermosensitive colorant used is 0.3-5.0:1; The thermosensitive dye displays different colors based on different energy values ​​within a temperature range of 50-300 degrees Celsius.

2. The multicolor thermosensitive color-emitting material as described in claim 1, characterized in that, The substrate layer is any one or more of the following materials: paper, BOPP, PET, PVC, LDPE, PA, PP, aluminized film, silver-plated PET, silver-plated PE, wash label, leather, cotton, chemical fiber cloth, polyester, or acrylic.

3. The multicolor thermosensitive color-emitting material as described in claim 1, characterized in that, The thermosensitive colorimetric agent is any one or a combination of commonly used thermosensitive colorimetric agents such as bisphenol A, bisphenol S, 3,3-diallylbisphenol S, 3-propoxybisphenol S, 2,4-benzenesulfonylphenol, and N-p-toluenesulfonyl-N'-3-(p-toluenesulfonyloxy)phenylurea.

4. The multicolor thermosensitive color-emitting material as described in claim 1, characterized in that, The polymer monomers or polymer compounds include any one or more combinations of acrylates, polyacrylates, isocyanates, polycarbonates, polyurethanes, phenolic resins, styrene-butadiene latex, styrene-acrylic rubber, modified starch, dextrin, or PVA.

5. The multicolor thermosensitive color-emitting material as described in claim 1, characterized in that, The thermosensitive colorant includes: blue crystal violet lactone, 4-4'-[(9-butyl-9-hydro-carbazole-3-)methylene]bis[N-methyl-N-phenyl]aniline or 7-(4-(diethylamino)-2-(ethoxy)phenyl)-7-(N-ethyl-2-methyl-indolyl)pyridinofuranone; The following are black-colored: 3-diethylamino-6-methyl-7-phenylaminofluorane, 3-dibutylamino-6-methyl-7-phenylaminofluorane, 3-(N-ethyl-4-tolylamino)-6-methyl-7-phenylaminofluorane, 3-(N-ethyl-isopentanamino)-6-methyl-7-phenylaminofluorane, or 3-diethylamino-6-methyl-2,4-dimethylphenylaminofluorane; The following are red-colored 3,3-bis(1-octyl-2-methylindole-3-yl)phthalide, 3,3-bis(1-butyl-2-methylindole-3-yl)phthalide, 3,3-bis(1-ethyl-2-methylindole-3-yl)phthalide, 3-diethylamino-7-methoxyfluorane, 3-diethylamino-7,8-benzofluorane, 3-(N-ethyl-N-tolylamino)-7-methoxyfluorane, or 3-diethylamino-6-methyl-7-chlorofluorane; 3-Diethylamino-7-(diphenylmethylamino)fluorane or 3-diethylamino-7-(2-chlorophenylamino)fluorane, which are green in color; 3-(4-dimethylaminophenyl)-3-(1-butyl-2-methyl-indole-3-yl)-6-dimethylaminophthalide, which appears purple; Orange-colored 3-diethylamino-6,8-dimethylfluorane, 1,3-dimethyl-6-diethylaminofluorane, 3-diethylamino-7-ethoxycarboxyfluorane, or 3-dibutylamino-7-ethoxycarboxyfluorane; and Any one or more combinations of yellow N,N-dimethyl-4-(2-(2-(octyloxy)phenyl)-6-phenylpyridin-4-yl)aniline and N,N-dimethyl-4-(2-(2-(butoxy)phenyl)-6-phenylpyridin-4-yl)aniline.

6. The multicolor thermosensitive color-emitting material as described in claim 1, characterized in that, The thermosensitive sensitizer includes any one or more combinations of 2-benzyloxynaphthalene, 1,2-diphenoxyethane, or 1,2-bis(3-methylphenoxy)ethane.

7. The multicolor thermosensitive color-emitting material as described in claim 1, characterized in that, The polymer crosslinking agent includes any one or more combinations of glyoxal, malondialdehyde, benzaldehyde, or aziridine.

8. The multicolor thermosensitive color-emitting material as described in claim 1, characterized in that, The antioxidants include any one or more combinations of BHA, CA, p-tert-butylphenol, or 2,4-di-tert-butylphenol.

9. The multicolor thermosensitive color-emitting material as described in claim 1, characterized in that, The ultraviolet absorber includes any one or a combination of benzophenone-based ultraviolet absorbers, benzotriazole-based ultraviolet absorbers, and triazine-based ultraviolet absorbers.

10. The multicolor thermosensitive color-emitting material as described in claim 1, characterized in that, The dispersant includes any one or more combinations of PVA, modified PVA, styrene-acrylic emulsion, styrene-butadiene emulsion, acrylic emulsion, or polyurethane emulsion.