Quickly-dried oily osmosis film forming type nano composite protective agent as well as preparation method and application thereof

Abstract

The invention belongs to the field of coating, and discloses a quickly-dried oily osmosis film forming type nano composite protective agent, as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing methylsilicone oil with high hydrogen content, long-chain alkyl acrylic ester, a platinum catalyst and an inert anhydrous solvent, performing reaction under the temperature of 70-90 DEG C for 2-6 hours, performing cooling, adding acetenyl cyclohexanol serving as an inhibitor, and naturally volatilizing to remove the solvent so as to prepare long-chain alkyl modified polymethylsiloxane containing active silicon hydrogen keys; then diluting the long-chain alkyl modified polymethylsiloxane containing the active silicon hydrogen keys by the inert anhydrous solvent, then adding nano MQ silicon resin, a silane coupling agent and a titanate coupling agent for uniform mixing to obtain a mixture, and diluting the mixture by the inert anhydrous solvent until the effective mass content is 1-10 percent so as to obtain the quickly-dried oily osmosis film forming type nano composite protective agent. The surface of an inorganic multihole base material is coated with the product, so that excellent osmosis film forming property and quick dryness are achieved; the quickly-dried oily osmosis film forming type nano composite protective agent is high in antifouling property and acid-alkali resistance performance.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to a preparation method of a quick-drying oily penetrating film-forming nano-composite protective agent containing active group-containing long-chain alkyl acrylate modified methyl hydrogen-containing polysiloxane. Background technique [0002] In organopolysiloxane, the Si-O-Si and O-Si-O bond angles are large, the molecular chain is flexible, the bond energy is large, the surface energy is small, and it has excellent hydrophobicity, high and low temperature resistance, weather resistance, and corrosion resistance. , electrical insulation, radiation resistance, flame retardancy and biocompatibility, widely used in construction, ceramics, stone, aerospace, electronic appliances, national defense, textile, petrochemical, pharmaceutical, food processing, daily chemical, etc. field. The methyl group in polydimethylsiloxane has little hindrance and is easily destroyed by strong acid or strong b...

AI Technical Summary

Problems solved by technology

[0003] In polydimethylsiloxane coatings, due to the small size of the large number of methyl groups in the molecular chain, the micro-interaction with solvent molecules and the substrate is small, and it is very easy to form a group during the drying process. The uniformity of dispersion on the surface is very poor, forming local spots and spots, which seriously affects the appearance of the coating

After the solvent molecules volatilize, these active ingredients are difficult to dry due to activity problems, which not only seriously reduces production efficiency, but also affects the appearance and durability of the substrate

In addition, although the traditional silicone coating is hydrophobic, the surface of the coating film is smooth, and the water contact angle is below 101°

[0004] Acrylate polymers have excellent film-forming properties and dispersibility, but acrylate polymers have poor permeability. For example, the coating film formed on floor tile materials can be destroyed under external force and lose its protective effect.

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