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Coating material and its preparation method

A coating material and resin technology, applied in the nano-modified organic-inorganic hybrid coating material and its preparation, in the field of coating materials, can solve the problems of reduced curing speed, large surface energy of nanoparticles, and reduced impact strength, etc.

Inactive Publication Date: 2013-06-19
CHONGQING UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The filling of the above-mentioned nanoparticles has a certain effect on improving the hardness and wear resistance of the polymer, but it has the following disadvantages: (1) the nano-inorganic particles are agglomerated due to incompatibility with the matrix, although the nanoparticles are surface-modified Or coating is beneficial to reduce agglomeration, but the process is complicated, industrialization is difficult, and the surface energy of nanoparticles is large, and the tendency of agglomeration is unavoidable; (2) the addition of inorganic nanoparticles is often accompanied by a decrease in curing speed; (3) Nano The agglomeration of particles becomes the source of collective defects, which often reduces the impact strength
Therefore, traditional fillers cannot control the movement of polymer segments at the molecular level, especially the mismatch of chemical potentials (such as solubility, compatibility, etc.) between hydrocarbon-based polymers and inorganic fillers leads to Inhomogeneity

Method used

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  • Coating material and its preparation method
  • Coating material and its preparation method
  • Coating material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: The formula 1 of nano-modified organic-inorganic hybrid coating material is as follows:

[0043]

[0044] In the reaction kettle, add 100 grams of xylene, 50 grams of carboxylated acrylic resin with a solid content of 50%, 80 grams of alkoxyacrylic resin with a solid content of 30%, 100 grams of methyl silicone resin with a solid content of 30%, and 0.6 grams of 731A sodium salt Powder, 0.6 g of X-405 wetting agent, 0.1 g of 013 defoamer, 0.2 g of BYK-333 leveling agent, slowly add 2 g of nano-modifier TriSilanolIsobutyl-POSS at 1000 rpm, within 5 to 10 minutes After the addition, continue to stir for 20-40 minutes, coat the film, and cure at 80° C. for 1 hour to obtain a nano-modified organic-inorganic hybrid coating material.

[0045] The pencil hardness of the coating is 3H, the gloss (Gloss 20°) is 95, the flexibility is 1mm, the impact strength is 60kg / cm, and the artificial accelerated aging resistance time is ≥1000 hours. Among them, the coating...

Embodiment 2

[0046] Embodiment 2: The formula 2 of nano-modified organic-inorganic hybrid coating material is as follows:

[0047]

[0048] In the reaction kettle, add 45 grams of acetone, 25 grams of butyl acetate, 5 grams of isopropanol, 12 grams of titanium dioxide, 10 grams of aluminum powder, 0.6 grams of DP-19 dispersant, 0.6 grams of NP-9 wetting agent, 1.3 Gram A36 defoamer, 0.5 gram RM-2020 leveling agent, high-speed stirring 0.8 hour under 2200rpm rotating speed, then add 20 grams of epoxy acrylic resin of solid content 50%, 100 grams of solid content 50% hydroxyl acrylic resin, in Slowly add 12 grams of TriSilanolIsobutyl-POSS at 1400rpm, finish adding within 30 minutes, continue stirring for 30 minutes, coat the film, and cure at 90°C for 0.5 hours to obtain a nano-modified organic-inorganic hybrid coating material.

[0049] The hardness of the coated pencil is 4H, the flexibility is 1mm, the impact strength is 60kg / cm, and the artificial accelerated aging resistance time is...

Embodiment 3

[0050] Embodiment 3: The formula 3 of nano-modified organic-inorganic hybrid coating material is as follows:

[0051]

[0052] In the reaction kettle, add 20 grams of methyl amyl ketone, 5 grams of 200# solvent oil, 7 grams of titanium dioxide, 5 grams of barium sulfate, 2 grams of iron oxide, 0.6 grams of SN5027 dispersant, 0.6 grams of W-18, 1.3 grams SN154 defoamer, 0.5 g of RM-8 leveling agent, high-speed stirring at 3000 rpm for 30 minutes, then add 35 g of solid content 60% amido acrylic resin, 50 g of solid content of 70% hydroxy acrylic resin, 10 g of solid content 30% methyl silicone resin, slowly add 24 grams of TriSilanolIsobutyl-POSS at 500rpm, finish adding within 30 minutes, continue stirring for 60 minutes, coat the film, and cure at 50°C for 12 hours to obtain nano-modified organic-inorganic hetero chemical coating material.

[0053]Coating pencil hardness 5H, flexibility 1mm, impact strength 60kg / cm, artificial accelerated aging resistance time ≥ 1000 hour...

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Abstract

A coating material is prepared by raw materials including a nano-modifier and resin matrixes of an acrylic resin and an organic silicone resin. The nano-modifier is hydroxyl polyhedral oligomeric silsesquioxane POSS. The nano-modifier POSS is uniformly dispersed at the molecular level in the resin matrixes (as shown in graphs 1, 2 and 3). The interactive force between POSS and the resins is strong so as to substantially raise the coating performance. In particular, the coating's properties such as glossiness, transparency, hardness, flexibility, impact strength, artificial accelerated aging resistance time and the like are all substantially raised. According to the coating, its pencil hardness is 3-6H, glossiness (Gloss 20o) is 95-96, flexibility is 1-3mm, impact strength is 60-80kg / cm, and artificial accelerated aging resistance time is greater than or equal to 1000 hours. The coating material provided by the invention can be widely applied in surface finishing of cars, metal, plastics, buildings, stone, timber, leather, textile and the like.

Description

technical field [0001] The invention relates to a coating material, in particular to a nano-modified organic-inorganic hybrid coating material and a preparation method thereof, belonging to the field of new materials. Background technique [0002] Coating material is a material coated on the surface of other objects to decorate, protect or give objects new functions. Traditional coating materials include organic coatings and inorganic coatings, both of which have their own advantages and disadvantages. With the rapid development of science and technology, people have higher and higher requirements for coating materials, and it is difficult for materials prepared with a single composition to meet various needs at the same time. Organic-inorganic hybrid coating materials formed by combining organic polymers and inorganic compounds at the molecular or nanoscale scale are expected to greatly improve the performance of one-component coating materials. [0003] Organic-inorganic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/00C09D133/00
Inventor 刘玉荣
Owner CHONGQING UNIV OF ARTS & SCI