CN-122011827-A - Titanium white powder masterbatch and preparation method and application thereof

Abstract

The invention relates to a titanium white powder masterbatch, a preparation method and application thereof, wherein the titanium white powder masterbatch comprises, by weight, 70-97 parts of titanium dioxide, 1-29 parts of calcium carbonate and 0.5-2 parts of polyvinylpyrrolidone, the particle size of D 50 of the calcium carbonate is 30-1260nm, and the mass ratio of the titanium dioxide to the calcium carbonate is (2.5-30): 1. The titanium white powder masterbatch provided by the invention is dust-free particles, has good environmental protection, regular particle morphology, moderate fineness, excellent fluidity and bulk density, is convenient for precise measurement, pneumatic conveying and automatic feeding, has excellent automatic suitability, can form uniform and stable white slurry after being dissolved in water, and has excellent dispersibility without agglomerated particles and flocculates.

Inventors

• WANG MENGMENG
• TANG LEI
• ZENG SAI
• LIU MAOCHEN
• LI MINGCAI

Assignees

• 金发科技股份有限公司

Dates

Publication Date

20260512

Application Date

20260324

Claims (10)

1. 1. The titanium white powder masterbatch is characterized by comprising the following components in parts by weight: 70-97 parts by weight of titanium dioxide 1-29 Parts by weight of calcium carbonate 0.5-2 Parts by weight of polyvinylpyrrolidone; The particle diameter of the D 50 of the calcium carbonate is 30-1260nm, and the mass ratio of the titanium pigment to the calcium carbonate is (2.5-30): 1.
2. 2. The titanium white powder masterbatch according to claim 1, wherein the titanium white powder masterbatch comprises the following components in parts by weight: 77-94 parts by weight of titanium dioxide 4-20 Parts by weight of calcium carbonate 0.6 To 1.6 parts by weight of polyvinylpyrrolidone.
3. 3. The titanium white powder masterbatch according to claim 1 or 2, characterized in that the titanium white powder comprises rutile titanium white and/or anatase titanium white.
4. 4. The titanium white powder masterbatch according to claim 1 or 2, characterized in that the calcium carbonate comprises light calcium carbonate and/or heavy calcium carbonate; Preferably, the light calcium carbonate comprises nano calcium carbonate; preferably, the D 50 particle size of the calcium carbonate is 200-400nm; preferably, the mass ratio of the titanium dioxide to the calcium carbonate is (3.9-18.6): 1.
5. 5. The titanium white powder masterbatch according to claim 1 or 2, characterized in that the polyvinylpyrrolidone has a K value of 27-33; preferably, the titanium white powder masterbatch further comprises a wetting dispersant; Preferably, the wetting dispersant is 0.5 to 2 parts by weight; Preferably, the wetting dispersant comprises a modified styrene maleic anhydride copolymer and/or an anionic polymeric wetting dispersant.
6. 6. The titanium white powder masterbatch according to claim 1 or 2, characterized in that the particle size of the titanium white powder masterbatch is 1.25-2.5mm.
7. 7. A method for preparing the titanium white powder masterbatch according to any one of claims 1-6, characterized in that it comprises the steps of: (1) Mixing titanium dioxide and calcium carbonate to obtain premixed dry powder; mixing polyvinylpyrrolidone, optionally a wetting dispersant and water to obtain a binding solution; (2) And mixing the binding liquid with the premixed dry powder, and granulating to obtain the titanium white powder masterbatch.
8. 8. The preparation method according to claim 7, wherein the mass percentage of polyvinylpyrrolidone in the adhesive liquid is 5-15%; preferably, the method of mixing of step (2) comprises spraying the binding liquid onto the pre-mixed dry powder after atomizing; Preferably, the spraying rate is 2-4mL/min.
9. 9. The method of claim 7, wherein the granulating comprises centrifugal shot blasting granulation; preferably, the centrifugal shot blasting granulation is carried out at a rotating speed of 150-200 rpm; Preferably, the centrifugal shot blasting granulation time is 20-30min; Preferably, the granulating step further comprises a drying step after completion; preferably, the drying temperature is 50-70 ℃; preferably, the drying further comprises a sieving step after completion.
10. 10. An aqueous coating, wherein the preparation raw material of the aqueous coating comprises the titanium white powder master batch according to any one of claims 1 to 6.

Description

Titanium white powder masterbatch and preparation method and application thereof Technical Field The invention belongs to the technical field of water-based paint, and particularly relates to a titanium white powder masterbatch, a preparation method and application thereof. Background With increasingly stringent environmental regulations, the use of solvent-borne coatings is limited, and aqueous coatings continue to grow in market share due to their environmental characteristics. The titanium pigment is used as the most critical white pigment in the water-based paint, and has the advantages of easiness in dust pollution, health and safety hazard, easiness in agglomeration of pigment particles, difficulty in uniform dispersion in a water-based system, influence on covering power, gloss and stability of the paint, and poor flowability of powdery materials, so that unstable blanking and inaccurate metering in an automatic production line are caused, and the production efficiency and intelligent upgrading are severely restricted. At present, the color master batch special for the paint has fewer research results, and the prior art has obvious limitations. CN112852099A discloses a color master batch for solvent-based paint and a preparation method thereof, wherein the color master batch is prepared from the following raw materials, by weight, 50-70 parts of carrier resin, 15-28 parts of pigment, 6-12 parts of dispersing agent and 1-5 parts of plasticizer, and the color master batch for solvent-based paint is prepared by taking modified aldehyde-ketone resin as a carrier, but cannot be used in water-based paint. CN114835925A discloses aldehyde ketone resin pre-dispersed colored sand and a preparation method thereof, wherein the colored sand comprises, by weight, 20-45 parts of toner, 25-45 parts of aldehyde ketone resin, 5-25 parts of a high-molecular compatilizer, 1-3 parts of oxidized polyethylene wax, 1-3 parts of ethylene bis stearamide, 1-4 parts of a calcium zinc stabilizer, 1-4 parts of palm oil, 1-3 parts of calcium carbonate, 1-3 parts of mica and 1-5 parts of an auxiliary agent, and the aldehyde ketone resin is used as a carrier to prepare the colored sand for paint in an auxiliary way, and the colored sand can not be used in water-based paint. CN117402526A discloses an art paint capable of being roll-coated and superimposed with color effects and a preparation method thereof, wherein the art paint comprises, by weight, 10-20 parts of water, 30-60 parts of a premix solution, 30-50 parts of an organic film forming substance and 3-5 parts of an auxiliary agent, the premix solution comprises silica sol and color master batches with a mass ratio of 1:1-1.5, the color master batches for plastics are adopted as color points in the interior wall paint of a building, the water solubility of the color master batches is improved by introducing the silica sol modified color master batches, the art effect is realized, but only one color point effect in the water paint is realized, and the color master batches cannot be dispersed in the water. Therefore, there is an urgent need to provide a titanium white powder masterbatch for aqueous coating materials which can be completely dispersed in water, has excellent dispersion properties, and is suitable for automated production. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide the titanium white powder master batch, the preparation method and the application thereof, and the titanium white powder master batch has good dispersibility in water, can form uniform and stable white slurry in water, has no agglomerated particles and flocculates, has regular particle morphology, moderate fineness, excellent fluidity and bulk density, is convenient for precise metering, pneumatic conveying and automatic feeding, has excellent automatic suitability, is dust-free particles, thoroughly solves the dust problem and has good environmental protection. To achieve the purpose, the invention adopts the following technical scheme: In a first aspect, the invention provides a titanium white powder masterbatch, which comprises the following components in parts by weight: 70-97 parts by weight of titanium dioxide 1-29 Parts by weight of calcium carbonate 0.5-2 Parts by weight of polyvinylpyrrolidone. The particle size of the calcium carbonate D 50 is 30-1260nm, and can be 50 nm, 100 nm, 200nm, 300 nm, 400 nm, 500 nm, 600 nm, 700 nm, 800 nm, 900 nm, 1000 nm, 1100 nm, 1200 nm and the like. In the present invention, the D 50 particle size of the calcium carbonate was obtained by laser particle size measurement (BT-9300 ST, dendong Baite Instrument Co., ltd.). The mass ratio of the titanium dioxide to the calcium carbonate is (2.5-30): 1, and can be 3:1, 5:1, 8:1, 10:1, 12:1, 15:1, 18:1, 20:1, 22:1, 25:1, 28:1 and the like. In the titanium white powder masterbatch provided by the invention, polyvinylpyrrolidone (PVP) can be used as a dispersing agent and