Softwood composite thermal insulation coating and manufacturing method thereof

Abstract

The invention discloses a cork composite thermal insulation coating and a manufacturing method thereof, and belongs to the technical field of forest chemical coating manufacturing. The existing artificially synthesized paint, coating series chemical materials and diluents are not environment-friendly and are easy to age. Natural renewable softwood is used for producing the softwood composite thermal insulation coating. The softwood composite heat-insulating natural-color and colored paint with the particle size of less than or equal to 300 microns is produced by mixing a natural softwood powdery material, a foaming flame retardant, a small amount of environment-friendly chemical or water-based adhesive, a solvent material or a pigment and a solvent through wet grinding, and is used for water resistance, rust resistance and corrosion resistance of metal equipment and steel-wood furniture. Compared with the traditional paint coating, the paint coating has the advantages of thermal insulation (hot-cold-93 DEG C), comfort, aging resistance, long service life and B2-level fire resistance.

Description

Technical Field

[0001] The invention belongs to the technical field of forest product chemical industry, and relates to the field of cork composite thermal insulation coating and a manufacturing method thereof. Background Art

[0002] The paints and coatings on the current market are divided into two categories: one is natural biological tung oil, raw lacquer (earth paint) or processed lacquer; the second is polyurethane paint or water-based paint synthesized by chemical raw materials or adding colorants, which is mainly used for waterproofing and rust prevention of metal products, waterproofing of building walls, and waterproofing and anti-corrosion of wood furniture surfaces; according to the different requirements of the equipment and object structure shape required for spraying, solvent dilution is added, and spraying or brushing is adopted. The above natural tung oil and raw lacquer have a long life, but the resources are scarce, the cost is high, and the construction is complicated; chemical synthetic paints and coatings have low costs, waterproof and anti-corrosion, and the elasticity and comfort of handrails and guardrails are poor; the construction and spraying are convenient, but there are volatiles, which is not environmentally friendly and harmful to human health; the coating is easy to scratch, easy to fall off due to collision, easy to age, short life, and poor insulation (hot and cold ≤-93℃) performance.

[0003] In view of the shortcomings of existing natural tung oil, raw lacquer and chemical synthetic paints and coatings, we use cork composite materials and new methods to produce a cork composite elastic, heat-insulating, aging-resistant and long-life coating. Summary of the invention

[0004] The purpose of the present invention is to address the shortcomings of existing natural and chemical synthetic paints, construction components, environmental protection performance, processing method performance, etc., and to propose a cork composite thermal insulation coating and a manufacturing method: softened cork or carbonized softened cork powder with a particle size of ≤60-300 mesh is used to manufacture softened cork composite thermal insulation ablation (200-1650°C) or carbonized softened cork composite cold insulation (≤-93°C) coatings.

[0005] The present invention is specifically implemented in this way:

[0006] The cork composite thermal insulation coating comprises: softened or carbonized softened cork with a particle size of 60-300 meshes, a flame retardant defoamer with the same particle size, a silicon dioxide flame retardant and the like are evenly mixed and poured into a fine grinder.

[0007] According to the designed weight of softened cork or carbonized softened cork and flame retardant defoamer mixture (accounting for 30-40%); add synthetic solvent glue or water-based glue according to the designed weight (accounting for 20% of the cork mixture). For softened cork or carbonized cork, the weight of the diluent added is 6-7 times the weight of the solid materials such as softened cork mixed with cork or carbonized cork flame retardant defoamer. Softened cork or carbonized cork should be poured into different fine grinders, finely ground respectively, and the particle size reaches the different particle size (in microns) required by the design, and then taken out for use. During spraying construction, if the thin consistency does not meet the spraying requirements, use an electric sprayer to spray a certain amount of glue solvent or diluted water glue that is the same as the glue solvent, stir them evenly and then spray. Spray or brush and dry naturally (autumn and summer) or wind-heat dry (spring and winter). After drying, the surface is flat and the thickness is consistent, and the surface is sanded to a fixed thickness. Color coating can be prepared by adding a certain weight proportion of pigment into softened cork or carbonized cork and grinding them together as required.

[0008] The composition of the cork composite thermal insulation coating solution: 1-30 parts by weight of softened cork or carbonized cork particles; 1-20 parts by weight of flame retardant defoamer material; 1-20 parts by weight of chemical synthesis or water-based adhesive solvent in the mixture, 1-70 parts by weight of chemical or water-based diluent, to ensure normal spraying construction, after drying, the softened cork or carbonized softened cork, the flame retardant defoamer ratio is 1-80 parts, the adhesive and non-volatile solvent are ≤1-6 parts by weight, and the diluent is completely volatilized.

[0009] Preparation method of cork composite thermal insulation coating

[0010] 1. Grind, sieve, sort, remove dust or directly use the cork particles to produce cork fine powder, screen out the cork powder with a diameter of ≤60-300 mesh, put it into a downward pressure mixing barrel and add water to stir using the suspension principle. Pure cork powder floats in the water, take it out and dry it, screen out the pure softened cork or carbonized softened cork fine powder with a diameter of ≤60-300 mesh, and weigh it according to the proportion of softened cork or carbonized softened cork in the coating formula.

[0011] 2. Weigh out the weight according to the ratio of flame retardant and defoamer in the coating formula.

[0012] 3. Weigh the softened cork or carbonized cork powder and the flame retardant defoamer and mix them in a sealing machine. After mixing, pack them into bags for later use.

[0013] 4. According to the coating ratio requirements, weigh out the weight of the mixture of softened cork or carbonized softened cork and its flame retardant and defoaming agent, which is 30-40% of the total weight.

[0014] 5. Mix the mixed coating according to the formula ratio: mix the softened cork or carbonized softened cork with the flame retardant defoamer respectively, add the synthetic glue or water-based adhesive solvent required by the coating, the weight of which is 20% of the total weight of the softened cork mixture, and then add 6-7 times the total weight of the mixture of diluent or water, pour into a fine grinder and grind the closed mixed cork coating with a mesh size of ≤60-300 mesh to the required particle size of ≤300 microns (different required coatings can meet the requirements of cork particle size to micron or nanometer unit level).

[0015] 6. If the coating is too thick during spraying, add a certain amount of diluent, the amount of which is 10-70% of the total weight of the cork mixed coating. The softened cork composite heat-insulating coating or carbonized softened cork composite cold-insulating (≤-93℃) coating is made by the above method. The raw materials used are softened cork or carbonized softened cork respectively; the uses are different: heat-insulating softened cork and cold-insulating (≤-93℃) carbonized softened cork respectively. The uses are heat insulation and cold insulation respectively; after spraying and drying, the diluent volatilizes, and the weight of the coating is only the sum of the flame retardant defoamer of softened cork or carbonized cork, the curing rubber and the flame retardant defoamer.

[0016] Cork composite thermal insulation, anti-corrosion and environmentally friendly coatings are upgraded products of existing natural tung oil, lacquer and synthetic chemical paints and coatings. They can be used for waterproofing, rust-proofing, anti-corrosion, thermal insulation and comfort of metal machinery and equipment, pipelines, guardrails, steel and wooden furniture. They are environmentally friendly, flame retardant B2 grade, aging-resistant and have a long service life.

Claims

1. A cork composite thermal insulation (hot and cold ≤-93°C) coating, which has the following formula: 1-80 parts by weight of a mixture of softened cork or carbonized softened cork and a flame retardant defoamer after drying; 1-20 parts by weight of a synthetic chemical adhesive or a water-based adhesive (after the coating is dried); during spraying, 1-70 parts by weight of a chemical synthetic or water-based diluent is a cork mixture; 1-95 parts by weight of softened cork or carbonized softened cork and a flame retardant defoamer after the coating is dried; and 1-5 parts by weight of non-volatile solvent impurities.

2. According to claim 1, the particle size of the softened cork before processing is ≤60-300 mesh, and the particle size of the carbonized softened cork is 16-60 mesh; Softened cork and carbonized cork retain the properties of softened cork or carbonized softened cork, such as light weight, elastic shock absorption, waterproof and anti-corrosion, thermal insulation and comfort, fireproof B2 grade, and aging resistance. The flame retardant defoaming agent is in granular powder state before processing.

3. According to claim 1, the soft cork or carbonized soft cork and the flame retardant defoamer after wet fine grinding have a particle size of ≤300 microns and are mixed with a chemical synthetic adhesive or an aqueous adhesive solvent to form a liquid, and the content of the cork flame retardant defoamer is only ≤20% of the weight of the cork.

4. After the paint spraying construction dries, the dilution solvent is almost completely volatilized, and the coating is only 95% of the softened cork or carbonized softened cork, the adhesive after the flame retardant defoamer is cured, and the non-volatile adhesive soluble impurities are about 5%.