Biodegradable coating with high biomass content and preparation method thereof

Abstract

The invention discloses a biodegradable coating with high biomass content and a preparation method thereof. The biodegradable coating is prepared by the preparation method of the biodegradable coating with high biomass content, and the biodegradable coating comprises the following components in parts by weight: 100 parts of biodegradable high-biomass thermoplastic polyurethane resin and 5-80 parts of filler, the biodegradable high-biomass thermoplastic polyurethane resin comprises 5-60 parts of polyol, 30-70 parts of biomass oil, 20-60 parts of isocyanate and 5-15 parts of a chain extender or a cross-linking agent, the biomass oil can increase the biodegradable characteristic, and the filler can increase the functionality of a coating film, so that the biodegradable coating with the high biomass content can be biologically decomposed, and the biodegradable coating with the high biomass content can also be used for coating the coating film with the high biomass content. And the stacking storage stability can be improved in a high-temperature environment.

Description

Technical Field

[0001] The present invention relates to a biodegradable coating with high biomass content and a preparation method thereof, and in particular to a biodegradable coating with high biomass content and a preparation method thereof in the coating field. Background Art

[0002] Generally speaking, coatings are defined as a material that can be applied to the surface of an object to form a solid film that is firmly adhered and has a certain strength. The solid film can be in the form of a coating, a paint film or a coating. Among them, solid films are mostly anti-corrosive, waterproof, oil-proof, chemical-resistant, light-resistant, and temperature-resistant. This prevents metal rust, wood decay, and cement weathering after objects are corroded by oxygen, moisture, etc.

[0003] However, the coating is mainly composed of film-forming substances, pigments, solvents and additives, and the film-forming substances are the basis of the coating, wherein the film-forming substances are mainly composed of natural resins or synthetic resins. Therefore, traditional coatings are mostly based on polymer elastomers or thermoplastic resins as main components, and thermoplastic resins include alkyd resins, acrylic resins, chlorinated rubber resins, epoxy resins, etc., and the source of pigments is mainly composed of one of natural pigments or synthetic pigments, so that the coating is colorful, thereby playing a decorative and protective role, and the solvent provides the film-forming substances to dissolve or disperse into a uniform liquid state, so that the coating forms a liquid state for easy coating, wherein most of the solvents are added during the manufacture of the coating or during the construction of the coating. In addition, the function of the additive is to have a specific effect on the coating, and then different additives are selected according to different effects, and the additives include cross-linking agents, antioxidants, thickeners, leveling agents, defoaming agents, drying agents, plasticizers, fillers or other additives.

[0004] Furthermore, the components of the polymer elastomers or thermoplastic resins used in traditional coatings are mostly similar to those of traditional plastics. They cannot be naturally decomposed in the natural environment and will break into plastic particles over time and enter the ecological chain, thereby causing plastic pollution. This is not environmentally friendly and harms the natural environment. Summary of the invention

[0005] The main purpose of the present invention is to provide a biodegradable coating with a high biomass content, so that the biodegradable coating with a high biomass content can be biodegraded, thereby reducing environmental pollution.

[0006] A secondary purpose of the present invention is to provide a method for preparing a biodegradable coating with a high biomass content. By adding fillers in the coating preparation step, not only can the biodegradable coating with a high biomass content be formed into a thin film structure, but also the stability of the biodegradable coating with a high biomass content in stacking and storage under a high temperature environment can be enhanced.

[0007] To achieve the above-mentioned object, the present invention provides a biodegradable coating with a high biomass content and a method for preparing the biodegradable coating with a high biomass content.

[0008] A biodegradable coating with a high biomass content according to the present invention comprises:

[0009] A biodegradable high biomass thermoplastic polyurethane resin; and

[0010] a filler;

[0011] Wherein, the biodegradable high-biomass thermoplastic polyurethane resin comprises:

[0012] a polyol;

[0013] Life oil;

[0014] Monoisocyanate; and

[0015] A chain extender or a cross-linking agent.

[0016] Among them, preferably, in terms of weight proportion, the biodegradable coating with high biomass content comprises 100 parts of the biodegradable high biomass thermoplastic polyurethane resin and 5 to 80 parts of the filler, wherein the biodegradable high biomass thermoplastic polyurethane resin comprises 5 to 60 parts of the polyol, 30 to 70 parts of the bio-oil, 20 to 60 parts of the isocyanate and 5 to 15 parts of the chain extender or the cross-linking agent.

[0017] Preferably, the biodegradable coating further comprises a solvent, and the solvent is at least one of methyl isobutyl ketone, acetone, butanone, methanol, ethanol, isopropanol, propylene glycol, ethyl acetate, toluene or water.

[0018] Preferably, the biodegradable coating further comprises a catalyst, and the catalyst is at least one of tin metal, zinc metal, potassium metal, bismuth metal or amine.

[0019] Among them, preferably, the filler is at least one of talc, montmorillonite, kaolin, mica powder, calcium carbonate, clay, bentonite, bentonite, magnesium sulfate, silicon dioxide, titanium dioxide, polymer synthetic resin, rosin, starch, cellulose, beeswax, wool wax, palm wax, jojoba oil, wood wax, candelilla wax, rice bran wax, soybean wax, silane compounds and modified derivatives thereof.

[0020] Preferably, the polyol has a molecular weight of less than 6000 g / mol and has a functional group that reacts with the isocyanate.

[0021] Among them, preferably, the polyol is one of polyethers, polyesters or polyester polyether copolymers such as polyethylene glycol, polypropylene glycol, tetramethylene glycol, polycaprolactone, polycarbonate, polybutylene adipate diol, polybutylene succinate, polylactic acid polyol, etc.

[0022] Among them, preferably, the biooil contains one of glycerides or fatty acids, and the glyceride is one of triglycerides, diglycerides and monoglycerides, and the fatty acid is one of oleic acid, linoleic acid, linolenic acid, erucic acid, ricinoleic acid, celery acid, calendula acid, α-eleostearic acid, ximenynic acid, epoxidized oleic acid olive oil, soybean oil, and epoxidized soybean oil.

[0023] Among them, preferably, the isocyanate is at least one of 4,4-diisocyanate dicyclohexylmethane, hexamethylene diisocyanate, isophorone diisocyanate, 2,6-diisocyanatohexanoic acid, L-lysine triisocyanate and isocycloheximide.

[0024] Among them, preferably, the chain extender or the cross-linking agent is at least one of ethylene glycol, 1,4-butanediol, neopentyl glycol, 1,6-hexanediol, ethylenediamine, 2,2-dihydroxymethylpropionic acid, glycerol, 1,1,1-trimethylolpropane, pentaerythritol, polyetheramine or polypolyester alcohol.

[0025] Furthermore, the present invention also provides a method for preparing a biodegradable coating with a high biomass content, comprising:

[0026] A resin synthesis step: a biodegradable high biomass thermoplastic polyurethane resin undergoes a polymerization reaction; and

[0027] a coating preparation step: adding a filler into the biodegradable high-biomass thermoplastic polyurethane resin and mixing them evenly, thereby producing a biodegradable coating with a high biomass content;

[0028] The biodegradable high-biomass thermoplastic polyurethane resin comprises polyol, biomass oil, isocyanate, chain extender or cross-linking agent, catalyst and solvent.

[0029] Preferably, the polymerization reaction is firstly to mix the polyol, the bio-oil and the isocyanate in a first temperature range for reaction, and then to add one of the chain extender or the cross-linking agent for reaction, and finally to add the solvent for reaction in a second temperature range, thereby producing the biodegradable high biomass thermoplastic polyurethane resin uniformly dispersed in the solvent, and the biodegradable high biomass thermoplastic polyurethane resin is one of the segmented polyurethane resins.

[0030] Preferably, castor oil, isophorone diisocyanate and polyethylene glycol are first subjected to the polymerization reaction, and then neopentyl glycol is added, and the process is as follows:

[0031]

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] A biodegradable coating with a high biomass content of the present invention comprises a biodegradable high biomass thermoplastic polyurethane resin and a filler, wherein the biodegradable high biomass thermoplastic polyurethane resin comprises polyol, bio-oil, isocyanate, chain extender or cross-linking agent, wherein the biodegradable high biomass thermoplastic polyurethane resin has the characteristic of being easily hydrolyzed and the bio-oil has the characteristic of being biodegradable, thereby controlling the cross-linking degree of the biodegradable high biomass thermoplastic polyurethane resin, thereby affecting the physical properties of the biodegradable high biomass thermoplastic polyurethane resin, and in the coating preparation step after the resin synthesis step, the filler is mixed with the biodegradable high biomass thermoplastic polyurethane resin, which can not only increase the state of the biodegradable coating with a high biomass content being formed into a film structure, but also enhance the stability of the biodegradable coating with a high biomass content when stacked and stored in a high temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic diagram of a biodegradable coating with a high biomass content according to the present invention;

[0035] Figure 2 The present invention is a flowchart of the steps of preparing a biodegradable coating with a high biomass content;

[0036] Figure 3A and Figure 3B for Figure 2 Schematic diagram of the resin synthesis steps;

[0037] Figure 4 for Figure 2 A schematic diagram of the coating mixing steps in the first preferred embodiment;

[0038] Figure 5 for Figure 2 A schematic diagram of the resin synthesis steps in a third preferred embodiment;

[0039] Fig. 6A for Figure 2 A schematic diagram of the coating mixing steps in a fourth preferred embodiment;

[0040] Figure 6B is a schematic diagram of an emulsification process in a fourth preferred embodiment;

[0041] Figure 7The present invention is a flow chart of the steps of resin synthesis, coating preparation and heating and drying.

[0042] Explanation of the reference numerals: 1-biodegradable coating with high biomass content; 11-biodegradable high biomass thermoplastic polyurethane resin; 111-polyol; 112-biomass oil; 113-isocyanate; 113a-reactive diisocyanate; 114-chain extender; 114a-diol chain extender; 115-crosslinking agent; 116-catalyst; 117-solvent; 118-diamine chain extender solvent; 12-filler; 121-cellulose; 122-beeswax; 13-printing adhesion promoter; 14-oil and water repellent; 2-preparation method of biodegradable coating; 21-resin synthesis step; 211-polymerization reaction; 22-coating preparation step; 3-emulsification treatment step; 31-beaker; 32-oven; 33-heating plate; 34-magnet; 35-emulsifier; 36-aqueous solution; 4-heating and drying step. DETAILED DESCRIPTION

[0043] The present invention will be further described below in conjunction with specific embodiments and drawings, and the advantages and features of the present invention will become more apparent as the description proceeds.

[0044] See also Figure 1 and Figure 2 As shown, the biodegradable coating 1 with high biomass content of the present invention is prepared by a preparation method 2 of the biodegradable coating with high biomass content, so that the biodegradable coating 1 with high biomass content includes a biodegradable high biomass thermoplastic polyurethane resin 11 and a filler 12.

[0045] See also Figure 1 , Figure 3A and Figure 3B As shown, the biodegradable high-biomass thermoplastic polyurethane resin 11 includes a polyol 111, a bio-oil 112, an isocyanate 113, a chain extender 114 or a cross-linking agent 115, a catalyst 116 and a solvent 117. In addition, by weight, the biodegradable high-biomass thermoplastic polyurethane resin 11 is 100 parts, and the filler 12 is 5 to 80 parts, wherein the polyol 111 in the biodegradable high-biomass thermoplastic polyurethane resin 11 is 5 to 60 parts, the bio-oil 112 in the biodegradable high-biomass thermoplastic polyurethane resin 11 is 30 to 70 parts, the isocyanate 113 in the biodegradable high-biomass thermoplastic polyurethane resin 11 is 20 to 60 parts, and the chain extender 114 or the cross-linking agent 115 in the biodegradable high-biomass thermoplastic polyurethane resin 11 is 5 to 15 parts.

[0046] Please continue reading Figure 1 ,and Figure 3A and Figure 3B As shown, the molecular weight of the polyol 111 is less than 6000 g / mol, and has a functional group that can react with the isocyanate 113, and the polyol 111 can be one of polyethers, polyesters or polyester polyether copolymers such as polyethylene glycol, polypropylene glycol, tetramethylene glycol, polycaprolactone, polycarbonate, polybutylene adipate diol, polybutylene succinate, polylactic acid polyol, etc., and the polyol 111 is preferably the polyethylene glycol.

[0047] In addition, the bio-oil 112 contains one of a glyceride or a fatty acid, and the glyceride can be one of a triglyceride, a diglyceride and a monoglyceride, and the fatty acid is one of oleic acid, linoleic acid, linolenic acid, erucic acid, ricinoleic acid, celery acid, calendula acid, α-eleostearic acid, simmenynic acid, epoxy oleic acid olive oil, soybean oil, epoxy soybean oil, etc., extracted and squeezed from a plant, and a modified derivative thereof. The bio-oil 112 is preferably castor oil, and the common bio-oil 112 is as follows:

[0048]

[0049] However, the isocyanate 113 is at least one of 4,4-diisocyanatodicyclohexylmethane, hexamethylene diisocyanate, isophorone diisocyanate, 2,6-diisocyanatohexanoic acid, L-lysine triisocyanate and isocycloheximide, and the isocyanate 113 is preferably the isophorone diisocyanate.

[0050] Furthermore, the chain extender 114 or the cross-linking agent 115 is at least one of ethylene glycol, 1,4-butanediol, neopentyl glycol, 1,6-hexanediol, ethylenediamine, 2,2-dihydroxymethylpropionic acid, glycerol, 1,1,1-trimethylolpropane, pentaerythritol, polyetheramine or polyol, wherein the chain extender 114 is preferably the neopentyl glycol or the polyetheramine, and the cross-linking agent 115 is preferably the 1,1,1-trimethylolpropane.

[0051] The catalyst 116 is at least one of tin metal, zinc metal, potassium metal, bismuth metal or amine, and the solvent 117 is at least one of methyl isobutyl ketone, acetone, butanone, methanol, ethanol, isopropanol, propylene glycol, ethyl acetate, toluene and water.

[0052] Among them, the filler 12 is at least one of talc, montmorillonite, kaolin, mica powder, calcium carbonate, clay, bentonite, bentonite, magnesium sulfate, silicon dioxide, titanium dioxide, polymer synthetic resin, rosin, starch, cellulose 121, beeswax 122, wool wax, palm wax, jojoba oil, wood wax, candelilla wax, rice bran wax, soybean wax, silane compounds and modified derivatives thereof, and the filler 12 is preferably the cellulose 121, the beeswax 122 or the silane compound according to different uses.

[0053] See also Figure 2 As shown, the process steps of the preparation method 2 of the biodegradable coating with high biomass content are shown. Figure 3A and Figure 3B As shown, in the first preferred embodiment, a resin synthesis step 21 is first performed. When performing the resin synthesis step 21, 5 parts by weight of the polyol 111, 52 parts by weight of the bio-oil 112, 40 parts by weight of the isocyanate 113 and the catalyst 116 are first mixed together in a first temperature range to react for 75 minutes to 120 minutes, wherein the preferred temperature of the first temperature range is 70° C. to 87° C., and then, in an environment of 70° C. to 87° C., 8 parts by weight of the chain extender 114 or the cross-linking agent 115 are added. and then react for 50 to 90 minutes, and finally add the solvent 117 in a second temperature range to react for 30 to 65 minutes to complete a polymerization reaction 211, and the preferred temperature of the second temperature range is 60° C. to 75° C., and then the biodegradable high biomass thermoplastic polyurethane resin 11 is produced through the polymerization reaction 211 to produce the biodegradable high biomass thermoplastic polyurethane resin 11 uniformly dispersed in the solvent 117, and the biodegradable high biomass thermoplastic polyurethane resin 11 is one of the segmented polyurethane resins.

[0054] See also Figure 1 , Figure 2 and Figure 4As shown, after completing the resin synthesis step 21, a coating preparation step 22 is started. When performing the coating preparation step 22, 20 to 80 parts by weight of the filler 12 are added to 100 parts by weight of the biodegradable high-biomass thermoplastic polyurethane resin 11, and the mixture is uniformly mixed at room temperature to produce the biodegradable coating 1 with a high biomass content. In a first preferred embodiment, 20 to 80 parts by weight of the cellulose 121 are added to 100 parts by weight of the biodegradable high-biomass thermoplastic polyurethane resin 11, and the mixture is uniformly mixed at room temperature to produce a printable printing adhesion promoter 13, wherein the cellulose 121 is preferably 50 parts by weight, and the printing adhesion promoter 13 is preferably 50 parts by weight. The solid content of the filler 13 is 12%. In addition, the cellulose 121 must be stirred and mixed with the solvent 117 at room temperature to be evenly dissolved in the solvent 117 before being mixed with the biodegradable high-biomass thermoplastic polyurethane resin 11. Furthermore, the printing adhesion promoter 13 is one of the biodegradable coating 1 with a high biomass content. In addition, the addition of the filler 12 can enhance the stability of the biodegradable coating 1 with a high biomass content when stacked in a high-temperature environment, avoid the biodegradable coating 1 with a high biomass content from generating re-adhesion when stacked in a high-temperature environment, and thus make the biodegradable coating 1 with a high biomass content have the properties of being rolled up for storage, saving storage space and sample stability during high-temperature transportation.

[0055] In the second preferred embodiment, when performing the resin synthesis step 21, the castor oil, the isophorone diisocyanate and the polyethylene glycol are first subjected to the polymerization reaction 211, and then the neopentyl glycol is added, and the process is as follows:

[0056]

[0057] See also Figure 5 As shown, in the third preferred embodiment, when performing the resin synthesis step 21, first, 5 parts by weight of the polyol 111, 52 parts by weight of the bio-oil 112 and 44 parts by weight of a reactive diisocyanate 113a in the biodegradable high biomass thermoplastic polyurethane resin 11 are mixed together in an environment of 70° C. to 87° C. to react for 75 minutes to 120 minutes, then, 8 parts by weight of a diol chain extender 114a are added in an environment of 70° C. to 87° C. to react for another 50 minutes to 90 minutes, and finally, 2 parts by weight of a diamine chain extender solvent 118 are added in an environment of 60° C. to 75° C. to react for 30 minutes to 65 minutes to complete the polymerization reaction 211, thereby producing the biodegradable high biomass thermoplastic polyurethane resin 11.

[0058] See also Fig. 6A and Figure 6B As shown, in the fourth preferred embodiment, when performing the coating preparation step 22, 5 to 35 parts by weight of the beeswax 122 are added to 100 parts by weight of the biodegradable high-biomass thermoplastic polyurethane resin 11, and the mixture is uniformly mixed at room temperature to produce an oil-repellent and water-repellent agent 14 having oil-repellent and water-repellent properties, and the oil-repellent and water-repellent agent 14 is one of the biodegradable coatings 1 with high biomass content, wherein the beeswax 122 is preferably 20 parts by weight, and the solid content of the oil-repellent and water-repellent agent 14 is 12%. In addition, the beeswax 122 must first be subjected to an emulsification treatment step 3 before it can be added. In the biodegradable high-biomass thermoplastic polyurethane resin 11, the emulsification treatment step 3 is to place 5 to 30 parts by weight of the beeswax 122 in a beaker 31, and put the beeswax 122 and the beaker 31 into an oven 32 for pre-melting, and place the pre-melted beeswax 122 on a heating plate 33, and add a magnet 34 to the beaker 31 for stirring, and continuously add 0.5 to 5 parts by weight of an emulsifier 35 and 70 to 100 parts by weight of an aqueous solution 36 during the stirring process, and the emulsifier 35 can be Tween 20, Tween 40, Tween 60, Tween 80, Span 20, Span 40, Span 60, Span 80, Span 85, xylan, hemicellulose, microcrystalline cellulose, hydroxypropyl methylcellulose, methylcellulose, carboxymethyl cellulose, etc. and their modified derivatives, wherein the emulsifier 35 is preferably xylan.

[0059] See also Figure 7 As shown, in the fifth preferred embodiment, the difference from the first preferred embodiment is that this case has a heating and drying step 4 after the coating preparation step 22. As shown in the figure, when performing the heating and drying step 4, a wire rod is first used to evenly coat the biodegradable coating 1 with high biomass content on a target substrate after corona treatment, so that a printable layer or an oil-repellent and water-repellent layer is formed on a surface of the target substrate, and then the target substrate with the printable layer or the oil-repellent and water-repellent layer is placed in the oven 32 for drying, so that the surface of the target substrate achieves a finger-touch drying effect, and finger-touch drying refers to lightly touching the surface of the printable layer or the oil-repellent and water-repellent layer with a fingertip, and a finger or a fingerprint is not adhered to the printable layer or the oil-repellent and water-repellent layer. Furthermore, there is no limitation on the method of coating the biodegradable coating 1 with high biomass content on the target substrate, and it can be sprayed on the surface of the target substrate by spraying or scraped on the surface of the target substrate by using other media.

[0060] In the sixth preferred embodiment, a sample A, a sample B and a sample C are respectively subjected to a printing ink fastness test and their appearance states, wherein the sample A is a plastic film without any surface modification, and the sample B is the plastic film having the printing adhesion promoter 13, wherein the printing adhesion promoter 13 of the sample B is formed by coating the printing adhesion promoter 13 on the plastic film after corona treatment by the wire rod and drying it, so that a thickness of the printable layer is less than 5 μm, and the sample C is the plastic film having the printable layer, wherein the printing adhesion promoter 13 of the sample C is formed by spraying the printing adhesion promoter 13 on the plastic film after corona treatment by a spray gun and drying it, so that a thickness of the printable layer is less than 5 μm.

[0061] In the printing ink fastness test, the three samples A, B and C were first printed and cured at 200N, and then a Tesa 7475 tape was used to stick the samples A, B and C, and the Tesa 7475 tape was immediately torn off the samples A, B and C. By observing the conditions of the samples A, B and C attached to the Tesa 7475 tape, when the printable layer of one of the samples A, B and C was peeled off or adhered to the Tesa 7475 tape, it was judged to be poor in fastness. The results are listed in Table 1 below, whereby the plastic film with the printing adhesion promoter 13 can not only maintain a transparent appearance, but also has the advantage of better printing ink fastness, thereby producing printable characteristics.

[0062] Table 1

[0063]

[0064] In the seventh preferred embodiment, a sample D, a sample E and a sample F are subjected to a Cobb water absorption test and a surface grease resistance test respectively, wherein the sample D is a paper having the oil-repellent and water-repellent agent 14, and the oil-repellent and water-repellent agent 14 of the sample D is formed by coating the oil-repellent and water-repellent agent 14 on the paper by the wire rod and drying it to form the oil-repellent and water-repellent layer, so that a thickness of the oil-repellent and water-repellent layer is less than 5 μm, and the sample E is the paper having the oil-repellent and water-repellent agent 14, wherein the oil-repellent and water-repellent agent 14 of the sample E is formed by spraying the oil-repellent and water-repellent agent 14 on the paper by the spray gun and drying it to form the oil-repellent and water-repellent layer, so that a thickness of the oil-repellent and water-repellent layer is less than 5 μm, and in addition, the sample F is a paper without any surface modification.

[0065] In the Cobb water absorption test, the samples D, E and F of known weight are first fixed in a fixture of a water absorption test dish, and a certain volume of water is injected for immersion. After a specific time, the samples D, E and F are taken out to weigh their water absorption weight. In addition, in the surface grease resistance test, a test liquid with known surface tension is first dropped on a surface of the samples D, E and F. After a period of time, the surfaces of the samples D, E and F are wiped and their transparency is observed. In this embodiment, the test liquid is a mixed melt of castor oil, toluene and n-heptane. When the appearance of the samples D, E and F does not change, the test liquid with a higher kit value is used for testing until the appearance of the samples D, E and F is damaged or transparent, and the kit value of the previous test is immediately marked. The results are listed in Table 2 below.

[0066] Table 2

[0067]

[0068] In the eighth preferred embodiment, the sample B, the sample C, the sample D and the sample E are respectively subjected to a re-tack test, wherein in the re-tack test, the plurality of samples B are stacked, the plurality of samples C are stacked, the plurality of samples D are stacked or the plurality of samples E are stacked respectively, thereby generating a stack in which the printing adhesion promoter 13 contacts the printing adhesion promoter 13, the printing adhesion promoter 13 contacts the plastic film, the oil-repellent and water-repellent agent 14 contacts the oil-repellent and water-repellent agent 14 or the oil-repellent and water-repellent agent 14 contacts the paper, and then an object with a load of one kilogram is placed above the plurality of samples B, the plurality of samples C, the plurality of samples D or the plurality of samples E, and placed in the oven 32 and left to stand for one hour, wherein when one of the printing adhesion promoter 13 or the oil-repellent and water-repellent agent 14 generates a residual viscosity or is damaged, indented or other appearance changes, it is determined that the re-tack test has failed. The results are listed in the following Table 3, whereby the printing adhesion promoter 13 in the filler 12 is added to the adhesive film or the oil-repellent and water-repellent agent 14 is added to the paper, so that the printing adhesion promoter 13 and the oil-repellent and water-repellent agent 14 can pass the re-adhesion test at 70°C, further indicating that the plurality of samples B, the plurality of samples C, the plurality of samples D or the plurality of samples E can be stored in stacks, rolled up, etc., and have convenient storage and can avoid the disadvantage of stack re-adhesion during high-temperature transportation.

[0069] Table 3

[0070]

[0071] In the ninth preferred embodiment, the sample B, the sample C, the sample D and the sample E are respectively subjected to an ultraviolet light irradiation appearance stability test, so that the sample B, the sample C, the sample D and the sample E are irradiated by an ultraviolet lamp together, and then the appearance color changes of the printing adhesion promoter 13 and the oil-repellent and water-repellent agent 14 themselves and the changes under the ultraviolet light irradiation are tested, and the results are listed in the following Table 4. By this, the printing adhesion promoter 13 in the filler 12 is added to the adhesive film or the oil-repellent and water-repellent agent 14 is added to the paper, so that the printing adhesion promoter 13 and the oil-repellent and water-repellent agent 14 can be irradiated by the ultraviolet lamp for 50 hours and 100 hours, not only their appearance colors have no changes that can be identified by the naked eye, but also there will be no appearance degradation or residual viscosity. The state, thereby showing that the printing adhesion promoter 13 and the oil-repellent and water-repellent agent 14 can not only maintain a stability under the irradiation of the ultraviolet lamp, but also maintain the efficacy of printing adhesion promotion or oil-repellent and water-repellent.

[0072] Table 4

[0073]

[0074] The above description is only illustrative rather than restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the claims of the present invention, but all will fall within the scope of protection of the present invention.

Claims

1. A biodegradable coating with a high biomass content, characterized in that: Include: A biodegradable high biomass thermoplastic polyurethane resin; and a filler; Wherein, the biodegradable high-biomass thermoplastic polyurethane resin comprises: a polyol; Life oil; Monoisocyanate; and A chain extender or a cross-linking agent.

2. The biodegradable coating with high biomass content according to claim 1, characterized in that: In terms of weight proportions, the biodegradable coating with a high biomass content comprises 100 parts of the biodegradable high-biomass thermoplastic polyurethane resin and 5 to 80 parts of the filler, wherein the biodegradable high-biomass thermoplastic polyurethane resin comprises 5 to 60 parts of the polyol, 30 to 70 parts of the bio-oil, 20 to 60 parts of the isocyanate and 5 to 15 parts of the chain extender or the cross-linking agent.

3. The biodegradable coating with high biomass content according to claim 1, characterized in that: The biodegradable coating further comprises a solvent, which is at least one of methyl isobutyl ketone, acetone, butanone, methanol, ethanol, isopropanol, propylene glycol, ethyl acetate, toluene or water.

4. The biodegradable coating with high biomass content according to claim 1, characterized in that: The biodegradable paint further comprises a catalyst, which is at least one of tin metal, zinc metal, potassium metal, bismuth metal or amine.

5. The biodegradable coating with high biomass content according to claim 1, characterized in that: The filler is at least one of talc, montmorillonite, kaolin, mica powder, calcium carbonate, clay, bentonite, magnesium sulfate, silicon dioxide, titanium dioxide, polymer synthetic resin, rosin, starch, cellulose, beeswax, wool wax, palm wax, jojoba oil, wood wax, candelilla wax, rice bran wax, soybean wax, silane compounds and modified derivatives thereof.

6. The biodegradable coating with high biomass content according to claim 1, characterized in that: The polyol has a molecular weight of less than 6000 g / mol and has a functional group reactive with the isocyanate.

7. The biodegradable coating with high biomass content according to claim 6, characterized in that: The polyol is one of polyethers, polyesters or polyester polyether copolymers such as polyethylene glycol, polypropylene glycol, tetramethylene glycol, polycaprolactone, polycarbonate, polybutylene adipate diol, polybutylene succinate, polylactic acid polyol, etc.

8. The biodegradable coating with high biomass content according to claim 1, characterized in that: The biomass oil contains one of glycerides or fatty acids, and the glyceride is one of triglycerides, diglycerides and monoglycerides, and the fatty acid is one of oleic acid, linoleic acid, linolenic acid, erucic acid, ricinoleic acid, celery acid, calendula acid, α-eleostearic acid, ximenynic acid, epoxidized oleic acid olive oil, soybean oil, and epoxidized soybean oil.

9. The biodegradable paint with high biomass content according to claim 1, characterized in that: The isocyanate is at least one of 4,4-diisocyanate dicyclohexylmethane, hexamethylene diisocyanate, isophorone diisocyanate, 2,6-diisocyanatohexanoic acid, L-lysine triisocyanate and isocycloheximide.

10. The biodegradable paint with high biomass content according to claim 1, characterized in that: The chain extender or the crosslinking agent is at least one of ethylene glycol, 1,4-butanediol, neopentyl glycol, 1,6-hexanediol, ethylenediamine, 2,2-dihydroxymethylpropionic acid, glycerol, 1,1,1-trimethylolpropane, pentaerythritol, polyetheramine or polypolyester alcohol.

11. A method for preparing a biodegradable coating with a high biomass content, characterized in that: Include: A resin synthesis step: a biodegradable high biomass thermoplastic polyurethane resin undergoes a polymerization reaction; and a coating preparation step: adding a filler into the biodegradable high-biomass thermoplastic polyurethane resin and mixing them evenly, thereby producing a biodegradable coating with a high biomass content; The biodegradable high-biomass thermoplastic polyurethane resin comprises polyol, biomass oil, isocyanate, chain extender or cross-linking agent, catalyst and solvent.

12. The method for preparing a biodegradable coating with a high biomass content according to claim 11, characterized in that: The polymerization reaction is to firstly mix the polyol, the bio-oil and the isocyanate in a first temperature range for reaction, and then add one of the chain extender or the cross-linking agent for further reaction, and finally add the solvent for reaction in a second temperature range, thereby producing the biodegradable high-biomass thermoplastic polyurethane resin uniformly dispersed in the solvent, and the biodegradable high-biomass thermoplastic polyurethane resin is one of the segmented polyurethane resins.

13. The method for preparing a biodegradable coating with a high biomass content according to claim 12, characterized in that: Castor oil, isophorone diisocyanate and polyethylene glycol are first subjected to the polymerization reaction, and then neopentyl glycol is added, and the process is as follows:

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