Plant-based environment-friendly powdered ink composition

Abstract

The invention relates to the technical field of powdered ink, and discloses a plant-based environment-friendly powdered ink composition which comprises the following components: resin, a coloring agent, a charge control agent, wax / a release agent and an additive. The resin comprises polyester resin and bio-based resin. The polyester resin comprises polyhydric alcohol and polybasic acid. The polyol comprises ethylene glycol, neopentyl glycol and a bisphenol A derivative. The polybasic acid comprises terephthalic acid, isophthalic acid and oxalic acid. Compared with the prior art, the plant-based environment-friendly powdered ink composition provided by the invention has the advantages that the plant-based environment-friendly powdered ink composition is based on a plant-oil-based biodegradable material and is prepared from plant oil, polyhydric alcohols and polybasic acid compounds, so that the excellent biodegradability and moisture resistance of the plant oil are kept; and when the resin is used for preparing the biological powdered ink, the biodegradability and moisture resistance of the powdered ink can be effectively improved, and the biological powdered ink prepared from the resin has excellent biodegradability, moisture resistance, performance retentivity and fixing strength.

Description

Technical Field

[0001] The present invention relates to the technical field of toners, in particular to a plant-based environmentally friendly toner composition. Background Art

[0002] Toner is a high-tech product based on materials science and rheology, with resin as its primary component (typically 70–90 wt.%). With the advent of new products, particularly high-speed printers and copiers, traditional styrene-acrylic resins are increasingly unable to meet the demands of low-temperature fusing. The key advantage of polyester resins is their high glass transition temperature and low softening point, resulting in exceptional melting properties during low-temperature fusing. These excellent properties have led to their increasing use in toner manufacturing. However, traditional polyester resins are primarily petroleum-based, making them difficult to degrade in the natural environment upon disposal. On the other hand, with the development of the global economy, there is an urgent need to develop inexpensive, environmentally friendly alternatives to non-degradable petroleum-based products.

[0003] Vegetable oils, produced from oil-producing plants, are not only a key component of edible oils but also serve as industrial raw materials. Due to their abundant reserves, environmental friendliness, and ease of modification, they are increasingly showing great potential for application in fields such as medicine, paints, and polymer materials. Vegetable oils are one of the most promising alternatives to petroleum in the synthesis of polymer materials. Fully utilizing them could alleviate dependence on petroleum resources and address the threat posed by increasingly depleted petroleum resources. The long carbon chains of vegetable oil fatty acids have low polarity and are highly hydrophobic, resulting in plant oil-based polymers that exhibit low water absorption and excellent hydrolytic stability.

[0004] How to obtain plant oil-based polymers suitable for preparing bio-inks has become a technical problem that needs to be solved urgently in this field. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the above technical difficulties and provide a plant-based environmentally friendly toner composition. The prepared toner has good biodegradability and moisture resistance.

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0007] A plant-based environmentally friendly toner composition comprises the following components: resin, colorant, charge control agent, wax / release agent, and additives.

[0008] The resins include polyester resins and bio-based resins.

[0009] The polyester resin includes a polyol and a polyacid.

[0010] The polyols include ethylene glycol, neopentyl glycol and bisphenol A derivatives.

[0011] The polyacids include terephthalic acid, isophthalic acid and oxalic acid.

[0012] The bio-based resin includes:

[0013] carbohydrate derivatives, including starch and cellulose;

[0014] vegetable oils, including castor oil, soybean oil, and palm oil;

[0015] Microbial fermentation products, including polyhydroxyalkanoates and polylactic acid.

[0016] The colorant includes:

[0017] carbon black;

[0018] Organic pigments: a type of colorant composed of carbon-based organic compounds, heavy metal-free, biodegradable organic pigments.

[0019] The waxes / release agents include polyethylene wax and paraffin wax.

[0020] The additives include silicon dioxide nanoparticles, aluminum oxide or titanium dioxide and magnetic materials.

[0021] The advantages of the present invention compared with the prior art are:

[0022] The plant-based environmentally friendly toner composition proposed in the present invention is based on a plant oil-based biodegradable material and is prepared from plant oil, polyols and polyacid compounds. It not only maintains the excellent biodegradability and moisture resistance of the plant oil; but also the resin used in the preparation of the bio-toner can effectively improve the biodegradability and moisture resistance of the toner. The bio-toner prepared with it has excellent biodegradability, moisture resistance, performance retention and fixing strength. DETAILED DESCRIPTION

[0023] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more. In addition, the term "include" and any variations thereof are intended to cover non-exclusive inclusions.

[0024] The present invention will be further described in detail below with reference to the embodiments.

[0025] Example 1

[0026] A plant-based environmentally friendly toner composition comprising:

[0027] 1. Resin (60%)

[0028] Main function: Acts as a binder for toner, affecting fixing performance and printing durability.

[0029] Core material: polyester resin + bio-based resin: modified resin derived from plant corn starch:

[0030] The synthesis of polyester resin mainly depends on two monomers:

[0031] (1) Polyols

[0032] Ethylene glycol: the most commonly used diol, providing flexibility to the molecular chain;

[0033] Neopentyl glycol (NPG): enhances the hydrolysis resistance and thermal stability of the resin;

[0034] Bisphenol A derivatives: used for high heat-resistant resins (BPA-EO, BPA-PO);

[0035] (2) Polyacids

[0036] Terephthalic Acid (PTA): Rigid structure, improves resin hardness and melting point;

[0037] Isophthalic Acid (IPA): Improves resin flexibility and solubility;

[0038] Adipic Acid: Introduces soft chain segments to reduce resin brittleness;

[0039] The raw materials of bio-based resins mainly come from the following biomass:

[0040] (1) Sugar derivatives

[0041] Starch (corn) → hydrolyzes to produce glucose, which is then fermented or chemically synthesized into resin monomers (such as lactic acid and succinic acid);

[0042] Cellulose (wood, straw) → produces glucose through enzymatic or acidic hydrolysis, which is further converted into resin raw materials;

[0043] (2) Vegetable oil

[0044] Castor oil → synthetic polyamide, polyurethane resin;

[0045] Soybean oil, palm oil → produce epoxy resin or alkyd resin through epoxidation or polymerization;

[0046] (3) Microbial fermentation products

[0047] Polyhydroxyalkanoates (PHA) → synthesized by bacterial fermentation of sugars and are completely biodegradable;

[0048] Polylactic acid (PLA) → Made from the polymerization of lactic acid (fermented from corn starch) and used in biodegradable toners.

[0049] 2. Colorant (10%)

[0050] Carbon black (black toner): high-purity carbon black with particle size controlled at nanometer level to enhance blackness;

[0051] Organic pigments (color toners): such as Phthalocyanine Blue (Cyan) chemical structure PB15:3, Azo Red (Magenta) chemical structure PY12+PR122, Benzidine Yellow (Yellow) PV23.

[0052] Organic pigments are a type of colorant composed of carbon-based organic compounds. They are heavy metal-free and biodegradable.

[0053] 3. Charge control agent (3%)

[0054] Adjusts the electrostatic properties of toner to ensure uniform development.

[0055] The formula of the present invention contains metal chromium and zinc compounds or high-end formula uses metal-free polymers (environmentally friendly).

[0056] 4. Wax / release agent (5%)

[0057] Polyethylene wax and paraffin wax: Helps toner release from the heat roller during fusing, reducing paper jams.

[0058] 5. Additives (3%)

[0059] Silica nanoparticles: improve fluidity and prevent agglomeration;

[0060] Alumina or titanium dioxide: adjust the triboelectric properties;

[0061] Magnetic materials: such as ferroferric oxide, used in magnetic development systems.

[0062] Example 2

[0063] A plant-based environmentally friendly toner composition comprises the following components in parts by weight: 50% resin, 5% colorant, 1% charge control agent, 1% wax / release agent, and 2% additives.

[0064] Example 3

[0065] A plant-based environmentally friendly toner composition comprises the following components in parts by weight: 70% resin, 15% colorant, 5% charge control agent, 10% wax / release agent, and 5% additives.

[0066] A method for preparing a plant-based environmentally friendly toner composition comprises the following steps:

[0067] Step 1: Weigh the resin, colorant, charge control agent, wax / release agent and additives according to the required weight and set aside;

[0068] Step 2: Evenly mix the resin, colorant, wax / release agent and additives;

[0069] Step 3: The mixture in step 2 is formed into granules through a twin-screw extruder;

[0070] Step 4: crushing the particles in step 3 into powder;

[0071] Step 5: Add the powder material prepared in step 4 and the charge control agent into a high-speed mixer and mix them to obtain a plant-based environmentally friendly toner composition.

[0072] The present invention and its embodiments are described above, and such description is not restrictive. If a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, and designs an embodiment similar to the technical solution without creative design, it shall fall within the scope of protection of the present invention.

Claims

1. A plant-based environmentally friendly toner composition, characterized in that: It includes the following components: resin, colorant, charge control agent, wax / release agent, additives.

2. The plant-based environmentally friendly toner composition according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 50-70% of resin, 5-15% of colorant, 1-5% of charge control agent, 1-10% of wax / release agent and less than 5% of additives.

3. The plant-based environmentally friendly toner composition according to claim 2, characterized in that: The resins include polyester resins and bio-based resins.

4. The plant-based environmentally friendly toner composition according to claim 3, characterized in that: The polyester resin includes a polyol and a polyacid.

5. The plant-based environmentally friendly toner composition according to claim 4, characterized in that: The polyols include ethylene glycol, neopentyl glycol and bisphenol A derivatives.

6. The plant-based environmentally friendly toner composition according to claim 4, characterized in that: The polyacids include terephthalic acid, isophthalic acid and oxalic acid.

7. The plant-based environmentally friendly toner composition according to claim 3, characterized in that: The bio-based resin includes: carbohydrate derivatives, including starch and cellulose; vegetable oils, including castor oil, soybean oil, and palm oil; Microbial fermentation products, including polyhydroxyalkanoates and polylactic acid.

8. The plant-based environmentally friendly toner composition according to claim 2, characterized in that: The colorant includes: carbon black; Organic pigments: a type of colorant composed of carbon-based organic compounds, heavy metal-free, biodegradable organic pigments.

9. The plant-based environmentally friendly toner composition according to claim 2, characterized in that: The waxes / release agents include polyethylene wax and paraffin wax.

10. The plant-based environmentally friendly toner composition according to claim 2, characterized in that: The additives include silicon dioxide nanoparticles, aluminum oxide or titanium dioxide and magnetic materials.