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CN-121975412-A - Bio-based modified alkyd resin odor-free coating and preparation method thereof

CN121975412ACN 121975412 ACN121975412 ACN 121975412ACN-121975412-A

Abstract

The application discloses a bio-based modified alkyd resin odor-free paint and a preparation method thereof, which belong to the technical field of paint, and the technical scheme is characterized in that the bio-based modified alkyd resin odor-free paint comprises, by weight, 55-70 parts of bio-based modified alkyd resin, 10-20 parts of rutile type titanium dioxide, 10-20 parts of precipitated barium sulfate, 6-12 parts of odor-free solvent, 0.2-0.5 part of fumed silica, 0.3-0.5 part of wetting dispersant, 0.3-0.6 part of efficient composite drier and 0.25-0.45 part of antiskinning agent. The coating disclosed by the application has the advantages of lasting odor removing effect, low VOCs emission, good adhesive force and flexibility, high hardness, good acid resistance and excellent wear resistance, and also has good weather resistance and construction performance, and the coating conforms to the development trend of environment-friendly coatings, effectively fills the technical blank of industry, and meets the market demand.

Inventors

  • QIAN JINJUN
  • HE XUEJIAO
  • ZHOU XIN
  • FAN BOWEN
  • ZHOU KANG
  • JIAO MINGMING

Assignees

  • 江苏中江泰阿生物基材料有限公司

Dates

Publication Date
20260505
Application Date
20260312

Claims (10)

  1. 1. The bio-based modified alkyd resin odor-free coating is characterized by comprising, by weight, 55-70 parts of bio-based modified alkyd resin, 10-20 parts of rutile type titanium dioxide, 10-20 parts of precipitated barium sulfate, 6-12 parts of odor-free solvent, 0.2-0.5 part of fumed silica, 0.3-0.5 part of wetting dispersant, 0.3-0.6 part of efficient composite drier and 0.25-0.45 part of antiskinning agent, wherein the raw materials used by the bio-based modified alkyd resin comprise vegetable oil derivatives, cashew nut shell oil, sorbitol and polybasic acid.
  2. 2. The bio-based modified alkyd resin odor eliminating paint of claim 1, wherein the weight ratio of vegetable oil derivative, cashew nut shell oil, sorbitol, and polyacid is (30-35): 2-6): 18-22: (9-10).
  3. 3. The bio-based modified alkyd resin odor eliminating paint of claim 1, wherein said vegetable oil derivative comprises (4-6) 1 by weight of oleic acid and arachidonic acid.
  4. 4. The bio-based modified alkyd odor eliminating paint of claim 1, wherein the polyacid comprises terephthalic acid and biomass polyacid in a weight ratio of 1 (0.05-0.07).
  5. 5. The bio-based modified alkyd resin odor-free coating of claim 1, wherein the bio-based modified alkyd resin further comprises trimethylolpropane, wherein the amount of trimethylolpropane is 0.3-0.5% of the total weight of the bio-based modified alkyd resin.
  6. 6. The bio-based modified alkyd resin odor eliminating coating according to claim 1, wherein the rutile titanium dioxide is chloride process rutile titanium dioxide.
  7. 7. The bio-based modified alkyd odor eliminating paint of claim 1, wherein said odor eliminating solvent is one or more of D60 solvent, EGDA solvent, PGDA solvent, DBE solvent.
  8. 8. The bio-based modified alkyd resin odor eliminating paint of claim 1, wherein the high efficiency composite drier is one or more of cobalt, manganese, calcium, iron, zinc metal oxides or metal salts, and rare earth catalysts.
  9. 9. The bio-based modified alkyd odor-free coating of claim 1, wherein the antiskinning agent is an oxime antiskinning agent.
  10. 10. A method of preparing a bio-based modified alkyd odor-free coating as defined in any one of claims 1-9, comprising the steps of: (1) A pre-dispersion stage, namely mixing and stirring part of the odor-removing solvent and part of the bio-based modified alkyd resin for 5-10min at the rotating speed of 500-600r/min, then adding fumed silica, stirring at the rotating speed of 200-300r/min until the fumed silica is completely dissolved, then adding a wetting dispersant, adjusting the rotating speed to 800-1000r/min, stirring at a high speed for 5-10min, then adding rutile type titanium dioxide and precipitated barium sulfate, and continuously stirring until the whole slurry is in a uniform state; (2) Grinding, namely grinding the object obtained in the step (1) for 1-2 times under the flow rate of 800-1000kg/h, and checking the fineness of less than or equal to 30 mu m; (3) And in the paint mixing stage, at the rotating speed of 300-500r/min, mixing and stirring the residual bio-based modified alkyd resin and the high-efficiency composite drier for 5-10min, then adding the residual odor-removing solvent to adjust the viscosity of the system, and then adding the anti-skinning agent to continuously stir for 10-15min to obtain the bio-based modified alkyd resin odor-removing paint.

Description

Bio-based modified alkyd resin odor-free coating and preparation method thereof Technical Field The application relates to the technical field of coatings, in particular to the technical field of alkyd resin coatings, and especially relates to a bio-based modified alkyd resin odor-free coating and a preparation method thereof. Background In modern industry and daily life, the paint plays an important role, can protect the surface of an object from being damaged by corrosion, abrasion and the like, and can play a decorative role. The alkyd resin paint has the advantages of flexible formula, strong adhesive force, high cost performance and the like, and is widely applied to a plurality of fields such as buildings, furniture, metal protection and the like. The protective force of the product is improved, the service life is prolonged, the attractive degree of the product is added, and the development of related industries is promoted. However, with the improvement of the living standard of people and the enhancement of environmental protection consciousness, the requirements on the performance and environmental protection of the paint are higher and higher, and some problems of the traditional alkyd paint resin are highlighted. The traditional alkyd paint resin is mostly synthesized by taking petrochemical resources as raw materials, not only depends on non-renewable resources, but also easily releases a large amount of Volatile Organic Compounds (VOCs) in the construction and curing processes, generates strong pungent smell, endangers human health and pollutes the environment, and is difficult to meet the current environment-friendly and odor-removing demands. To improve this problem, bio-based modified alkyd resins, which use natural renewable resources such as soybean oil, castor oil, etc. as raw materials, have become a hot spot of research, can reduce petrochemical resource dependence and reduce VOCs emissions. However, in use, people find that the existing bio-based modification technology is still imperfect, and the modified paint is easy to have the problems of poor smell purifying effect and long smell residual time. Meanwhile, most of the odor-removing coatings on the market are insufficient in odor-removing durability only through physical odor-masking or simple odor-removing treatment, and mechanical performance and environmental protection performance of the coatings are difficult to be considered. Therefore, the modified alkyd resin coating which takes the renewable bio-based material as the raw material, has lasting odor removing effect, low emission of VOCs and good mechanical property is researched, can be in line with the development trend of environment-friendly coatings, effectively fills the blank of industry technology, and meets the actual demands of the market. Disclosure of Invention In order to solve the technical problems, the application provides a bio-based modified alkyd resin odor-free coating and a preparation method thereof. In a first aspect, the application provides a bio-based modified alkyd resin odor-free coating, which adopts the following technical scheme: The raw materials of the bio-based modified alkyd resin odor-free paint comprise, by weight, 55-70 parts of bio-based modified alkyd resin, 10-20 parts of rutile type titanium dioxide, 10-20 parts of precipitated barium sulfate, 6-12 parts of odor-free solvent, 0.2-0.5 part of fumed silica, 0.3-0.5 part of wetting dispersant, 0.3-0.6 part of efficient composite drier and 0.25-0.45 part of antiskinning agent, wherein the raw materials of the bio-based modified alkyd resin comprise vegetable oil derivatives, cashew nut shell oil, sorbitol and polybasic acid. By adopting the technical scheme, the bio-based modified alkyd resin is used as a main component, and is matched with various raw materials such as rutile type titanium dioxide, precipitated barium sulfate, odor removing solvent and the like to prepare the coating which is based on renewable bio-based raw materials, has lasting odor removing effect and low VOCs emission, and the obtained coating has good adhesive force and flexibility, high hardness, good acid resistance and excellent wear resistance, has good weather resistance and construction performance, meets the development trend of environment-friendly coating, effectively fills the technical blank of industry and meets market demands. The bio-based modified alkyd resin disclosed by the application adopts vegetable oil derivatives, cashew nut shell oil, sorbitol and polyalcohol as main raw materials to be mixed and matched for use. The long-chain structure of the cashew shell oil not only improves the dryness of the resin, but also can be crosslinked with double bonds of the vegetable oil derivative to increase the crosslinking density, thereby improving the chemical corrosion resistance and wear resistance of the resin, the alcoholic hydroxyl group of the cardanol can be used as a chain termination structure